HITTITE HMC795LP5E

HMC795LP5E
v00.0409
modulators - direct quadrature - SMT
10
Typical Applications
Features
The HMC795LP5E is ideal for:
High Linearity OIP3: + 22 dBm
• UMTS, GSM or CDMA Basestations
High Output Power: +10 dBm Output P1dB
• Fixed Wireless or WLL
High Carrier Suppression: 55 dBc
• ISM Transceivers, 900 & 2400 MHz
High Sideband Suppression: 53 dBc
• GMSK, QPSK, QAM, SSB Modulators
Read/Write Serial Port Interface (SPI)
• Cellular/3G and WiMAX/4G
SPI & 6-bit parallel port programmable
32 dB Gain Control
• Microwave IFs
DC - 440 MHz Baseband Input
32 Lead 5x5 mm QFN Package: 25 mm2
Functional Diagram
General Description
The HMC795LP5E is a variable gain, direct quadrature
modulator ideal for digital modulation applications
from 50 - 2800 MHz including: Cellular/3G, Broadband
Wireless Access and ISM circuits. Housed in a compact
5x5mm (LP5) SMT QFN package, the modulator
offers a high level of integration, exceptionally low
carrier feedthrough, and a low cost alternative to more
complicated double upconversion architectures.
The LO requires -9 to +3 dBm and can be driven
in either differential or single-ended mode. The
baseband inputs will support modulation inputs from
DC - 440 MHz.
The differential RF output port is driven by a 6 bit
digital controlled variable gain amplifier to nominally
provide up to 32 dB of very linear gain control in 0.5 dB
steps. The low carrier suppression is maintained over
the VGA dynamic range. The gain control interface
accepts either three wire serial input or 6 bit parallel
word. In addition, the gain control can be modified
through the SPI to adjust a look up table to control the
gain step to as low as 0.1 dB, with reduced range, or
to adjust individual gain steps for system linearization.
Electrical Specifications, See Test Conditions on Following Page
Parameter
Min.
RF Frequency
Typ.
Max.
Min.
11
7
9
9
11
1000
Output Power
8
9.5
Output P1dB
13
14
Typ.
Max.
Min.
11
4
8
9
11
1950
Typ.
Max.
2690
Units
MHz
11
dB
dBm
Output IP3
23
25
18
22
17
22
dBm
Carrier Feedthrough (Uncal)
-40
-45
-42
-46
-42
-46
dBm
Carrier Feedthrough (Cal)
-55
-62
-55
-62
-52
-57
dBm
Sideband Suppression (Uncal)
43
55
49
53
45
50
Output Noise Floor @ 20 MHz offset
10 - 1
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
-158
-157
-156
-155
-154
dBc
-153
dBm/Hz
RF Return Loss
-10
-14
-10
-12
-10
-12
dB
LO Return Loss
-10
-15
-10
-15
-10
-12
dB
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Electrical Specifications (Continued)
Parameter
Conditions
Min.
Typ.
Max.
Units
0
dB
Gain Control Characteristics
Gain Control Range
Gain Control Step
-31.5
Can be adjusted with SPI
0.5
dB
State Error (at max Attenuation)
±0.5
±1
dB
Gain Step Error
±0.05
±0.13
dB
RF Input Characteristics
RF Return Loss
RF Bandwidth
2800
MHz
Requires external matching
50
9
-15
-10
dB
with matching specified in table
5
10
15
%
5600
MHz
LO Input Characteristics
LO Frequency Range
LO Return Loss
100
Required 1 nF blocking cap
LO Drive Level
-10
dB
-9
0
+3
dBm
1.2
1.3
1.4
V
Baseband Inputs
I/Q Input Bias Level
Output Power ±0.5 dB of Typ.
Input Bias Current
Differential Input Impedance
Bandwidth
90
µA
5K||100pF
Ohms||pF
DC
440
MHz
5.5
V
DC Power Requirements
Analog Supply Voltage
(VCCMIX, VCCBG, VCCRF, VCCDAC, VCCLO)
All must be equal
Digital Supply Voltage (VDD3)
IDD - Total Current Consumption
4.5
5
3
3.3
3.5
V
106
127
145
mA
1
µA
Power Down Current
Test Conditions: Unless Otherwise Specified, the Following Test Conditions Were Used
Parameter
Condition
Temperature
25 °C
VGA Attenuation
0 dB
Baseband Input Frequency
1 MHz
Baseband Input DC Voltage
1.3V
Baseband Input AC Voltage
(Peak to Peak Differential, I and Q)
1.4V
Baseband Input AC Voltage for OIP3 Measurement
(Peak to Peak Differential, I and Q)
290 mV per tone @ 1 & 1.5 MHz
Frequency Offset for Output Noise Measurements
Supply
20 MHz
Analog: +5V, Digital: +3.3V
LO Input Power
0 dBm
LO Input Mode
Differential
Sideband and Carrier Suppression
RF Output Mode
Uncalibrated
Differential
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
RF Frequency Range
10 - 2
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Calibrated vs. Uncalibrated Test Results
During the Uncalibrated Carrier Suppression tests, care is taken to ensure that the I/Q signal paths from the Vector
Signal Generator (VSG) to the Device Under Test (DUT) are equal. The “Uncalibrated” Carrier Suppression plots were
measured at T= -40 °C, +25 °C, and +85 °C.
The “Calibrated” Carrier Suppression data was plotted after a manual adjustment of the IP/IN & QP/QN DC offsets
at +25 °C, 5V Vcc, 0 dBm LO input power level, and the RF output frequency set to the midband of the measurement
range. The adjustment settings were held constant during tests over temperature and frequency.
Typical Performance Characteristics, Vcc +5V, LO 0 dBm, +25 °C
Output Power, Output IP3 & Sideband
Suppression vs. Freq. over Temperature [1]
Uncalibrated & Calibrated Carrier
Feedthrough vs. Freq. over Temperature [1]
-40
0
UNCALIBRATED
OUTPUT IP3
-45
30
-10
20
-20
OUTPUT POWER
10
-30
0
+25 C
+85 C
-40 C
-10
-40
SIDEBAND SUPPRESSION
-20
800
850
900
950
1000
1050
1100
1150
-50
CARRIER FEEDTHROUGH (dBm)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
40
SIDEBAND SUPPRESSION (dBc)
-60
1200
-50
-55
-60
CALIBRATED
-65
-70
+25 C
+85 C
-40 C
-75
-80
800
850
900
950
FREQUENCY (MHz)
Output Power & Output Noise @ 1 GHz vs.
VGA Attenuation over Temperature [1]
-140
-10
-150
-20
-160
OUTPUT NOISE
4
8
12
16
20
ATTENUATION (dB)
1150
24
28
-170
-180
32
-40
-55
+25 C
+85 C
-40 C
CARRIER
FEEDTHROUGH
-60
-45
-65
-70
-50
-75
-80
-55
SIDEBAND
SUPPRESSION
-85
-90
0
-60
4
8
12
16
20
24
28
ATTENUATION (dB)
[1] Output Matched to 1 GHz
10 - 3
1200
-50
CARRIER FEEDTHROUGH (dBm)
OUTPUT POWER (dBm)
-130
0
-40
0
1100
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
32
SIDEBAND SUPPRESSION (dBc)
+25 C
+85 C
-40 C
OUTPUT POWER
-30
1050
Carrier Feedthrough & Sideband
Suppression @ 1 GHz vs. VGA Attenuation
over Temperature [1]
-120
20
10
1000
FREQUENCY (MHz)
OUTPUT NOISE @ 20 MHz (dBm/Hz)
modulators - direct quadrature - SMT
10
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Output Power & Output Noise
@ 1 GHz vs. Input Baseband Amplitude
over Temperature [1]
-145
-150
OUTPUT POWER
5
0
-155
OUTPUT NOISE
-5
-10
0.1
2
1
-160
3
-45
-45
-50
-50
-55
-55
SIDEBAND
SUPPRESSION
-60
+25 C
+85 C
-40 C
-65
-70
1
-10
20
-20
OUTPUT POWER
-10
-20
800
-40
850
900
950
1000
-30
-40
SIDEBAND SUPPRESSION
1050
1100
-50
-45
CARRIER FEEDTHROUGH (dBm)
OUTPUT IP3
0 dBm
+3 dBm
-9 dBm
-60
1200
1150
UNCALIBRATED
-50
-55
CALIBRATED
-60
-65
-70
0 dBm
+3 dBm
-9 dBm
-75
-80
800
850
900
Output Power, Output IP3 & Sideband Suppression vs. Freq. over Supply Voltage [1]
0
-10
20
-20
OUTPUT POWER
-10
-20
800
850
900
950
1000
-30
-40
SIDEBAND SUPPRESSION
1050
FREQUENCY (MHz)
1050
1100
1150
1200
-40
1100
1150
-50
-60
1200
-45
CARRIER FEEDTHROUGH (dBm)
30
4.5V
5.0V
5.5V
1000
Uncalibrated & Calibrated Carrier Feedthrough vs. Freq. over Supply Voltage [1]
OUTPUT IP3
SIDEBAND SUPPRESSION (dBc)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
40
0
950
FREQUENCY (MHz)
FREQUENCY (MHz)
10
3
Uncalibrated & Calibrated Carrier
Feedthrough vs. Freq. over LO Power [1]
0
SIDEBAND SUPPRESSION (dBc)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
40
0
2
10
INPUT BASEBAND AMPLITUDE (Vp-p diff)
Output Power, Output IP3 & Sideband
Suppression vs. Freq. over LO Power [1]
10
-65
-70
0.1
INPUT BASEBAND AMPLITUDE (Vp-p diff)
30
-60
UNCALIBRATED
-50
-55
CALIBRATED
-60
-65
-70
4.5 V
5.0 V
5.5 V
-75
-80
800
850
900
950
1000
1050
1100
FREQUENCY (MHz)
1150
1200
modulators - direct quadrature - SMT
OUTPUT POWER (dBm)
10
-40
CARRIER
FEEDTHROUGH
SIDEBAND SUPPRESSION (dBc)
+25 C
+85 C
-40 C
15
-40
OUTPUT NOISE @ 20 MHz (dBm/Hz)
OP1dB 14.3 dBm
OP1dB 14.1 dBm
OP1dB 14.0 dBm
CARRIER FEEDTHROUGH (dBm)
20
Carrier Feedthrough & Sideband
Suppression @ 1 GHz vs. Input Baseband
Amplitude over Temperature [1]
[1] Output Matched to 1 GHz
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10 - 4
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Output Power, Output IP3 & Sideband
Suppression vs. Freq. over Temperature [1]
40
-45
+25 C
+85 C
-40 C
OUTPUT IP3
-10
20
-20
OUTPUT POWER
10
-30
0
-40
SIDEBAND SUPPRESSION
-10
-50
-20
1800
1850
1900
1950
2000
2050
2100
CARRIER FEEDTHROUGH (dBm)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
UNCALIBRATED
30
-60
2200
2150
-50
-55
-60
-65
CALIBRATED
-70
+25 C
+85 C
-40 C
-75
-80
1800
1850
1900
1950
FREQUENCY (MHz)
Output Power & Output Noise @ 1950 MHz
vs. VGA Attenuation MHz over Temperature [1]
-120
OUTPUT POWER (dBm)
-130
0
-140
-10
-150
-20
-160
-30
-170
OUTPUT NOISE
4
8
12
16
20
24
-180
32
28
-70
-75
-80
-85
-60
4
8
12
16
20
24
-150
OUTPUT NOISE
-5
-10
-155
-15
-160
2
INPUT BASEBAND AMPLITUDE (Vp-p diff)
32
3
-30
-45
-35
-50
-40
-55
-45
SIDEBAND
SUPPRESSION
-60
-65
-70
0.1
-50
+25 C
+85 C
-40 C
-55
-60
1
2
INPUT BASEBAND AMPLITUDE (Vp-p diff)
[1] Output Matched to 1950 MHz
10 - 5
28
CARRIER
FEEDTHROUGH
CARRIER FEEDTHROUGH (dBm)
OUTPUT POWER (dBm)
-55
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
3
SIDEBAND SUPPRESSION (dBc)
-145
OUTPUT POWER
1
SIDEBAND
SUPPRESSION
-40
-140
-20
0.1
-50
Carrier Feedthrough & Sideband
Suppression @ 1950 MHz vs. Input
Baseband Amplitude over Temperature [1]
OP1dB 10.9 dBm
OP1dB 11.6 dBm
OP1dB 11.8 dBm
0
-45
-65
-90
0
OUTPUT NOISE @ 20 MHz (dBm/Hz)
5
+25 C
+85 C
-40 C
CARRIER
FEEDTHROUGH
-60
ATTENUATION (dB)
20
+25 C
+85 C
-40 C
2200
-40
-55
Output Power & Output Noise
@ 1950 MHz vs. Input Baseband
Amplitude over Temperature [1]
10
2150
-50
ATTENUATION (dB)
15
2100
SIDEBAND SUPPRESSION (dBc)
+25 C
+85 C
-40 C
OUTPUT POWER
-40
0
2050
Carrier Feedthrough & Sideband
Suppression @ 1950 MHz vs. VGA
Attenuation over Temperature [1]
CARRIER FEEDTHROUGH (dBm)
20
10
2000
FREQUENCY (MHz)
OUTPUT NOISE @20MHz (dBm/Hz)
modulators - direct quadrature - SMT
-40
0
SIDEBAND SUPPRESSION (dBc)
10
Uncalibrated & Calibrated Carrier
Feedthrough vs. Freq. over Temperature [1]
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Output Power, Output IP3 & Sideband
Suppression vs. Freq. over LO Power [1]
0
20
-20
OUTPUT POWER
10
-30
0
-40
SIDEBAND SUPPRESSION
-10
-50
-20
1800
1850
1900
1950
2000
2050
2100
2150
-45
-60
2200
UNCALIBRATED
-50
-55
CALIBRATED
-60
-65
-70
-80
1800
1850
1900
0
-10
-20
OUTPUT POWER
10
-30
-40
SIDEBAND SUPPRESSION
-10
-50
1850
1900
1950
2000
2050
2150
2200
2100
2150
-60
2200
UNCALIBRATED
-50
-55
CALIBRATED
-60
-65
-70
4.5 V
5.0 V
5.5 V
-75
-80
1800
1850
FREQUENCY (MHz)
1900
1950
2000
2050
2100
2150
2200
FREQUENCY (MHz)
Output Power, Output IP3 & Sideband
Suppression vs. Freq. over Temperature [2]
40
Uncalibrated & Calibrated Carrier
Feedthrough vs. Freq. over Temperature [2]
-30
10
OUTPUT IP3
30
-10
OUTPUT POWER
10
-20
0
-30
-10
-40
-20
-50
+25 C
+85 C
-40 C
-30
SIDEBAND SUPPRESSION
-60
-40
-70
2500
2550
2600
2650
2700
2750
2800
FREQUENCY (MHz)
[1] Output Matched to 1950 MHz
CARRIER FEEDTHROUGH (dBm)
0
20
SIDEBAND SUPPRESSION (dBc)
POWER (dBm) & IP3 (dBm)
2100
-45
CARRIER FEEDTHROUGH (dBm)
OUTPUT IP3
20
-20
1800
2050
-40
SIDEBAND SUPPRESSION (dBc)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
40
4.5V
5.0V
5.5V
2000
Uncalibrated & Calibrated Carrier Feedthrough vs. Freq. over Supply Voltage [1]
Output Power, Output IP3 & Sideband Suppression vs. Freq. over Supply Voltage [1]
0
1950
FREQUENCY (MHz)
FREQUENCY (MHz)
30
10
0 dBm
+3 dBm
-9 dBm
-75
-35
UNCALIBRATED
-40
-45
CALIBRATED
-50
+25 C
+85 C
-40 C
-55
-60
2500
2550
2600
2650
2700
2750
2800
modulators - direct quadrature - SMT
-10
CARRIER FEEDTHROUGH (dBm)
0 dBm
+3 dBm
-9 dBm
OUTPUT IP3
30
-40
SIDEBAND SUPPRESSION (dBc)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
40
Uncalibrated & Calibrated Carrier
Feedthrough vs. Freq. over LO Power [1]
FREQUENCY (MHz)
[2] Output Matched to 2690 MHz
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10 - 6
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Carrier Feedthrough & Sideband
Suppression @ 2960 MHz vs. VGA
Attenuation over Temperature [1]
Output Power & Output Noise @ 2690 MHz
vs. VGA Attenuation over Temperature [1]
OUTPUT POWER (dBm)
-10
-150
-20
-160
-30
-40
0
-170
OUTPUT NOISE
4
8
12
16
20
24
-20
-50
-40
-50
-70
-60
-80
+25 C
+85 C
-40 C
-70
4
8
12
-135
-140
OUTPUT POWER
0
-145
-10
-150
OUTPUT NOISE
CARRIER FEEDTHROUGH (dBm)
OP1dB 11.9 dBm
OP1dB 12.3 dBm
-155
2
-40
-30
CARRIER
FEEDTHROUGH
-50
-60
-50
+25 C
+85 C
-40 C
-10
-35
OUTPUT POWER
10
-30
0
-40
-10
-50
SIDEBAND SUPPRESSION
2650
2700
FREQUENCY (MHz)
2750
-60
2800
CARRIER FEEDTHROUGH (dBm)
OUTPUT POWER (dBm), OUTPUT IP3 (dBm)
-30
SIDEBAND SUPPRESSION (dBc)
0
-20
2600
SIDEBAND
SUPPRESSION
-60
2
1
UNCALIBRATED
-40
-45
CALIBRATED
-50
0 dBm
+3 dBm
-9 dBm
-55
-60
2500
2550
2600
2650
2700
FREQUENCY (MHz)
[1] Output Matched to 2960 MHz
10 - 7
3
Uncalibrated & Calibrated Carrier
Feedthrough vs. Freq. over LO Power [1]
0 dBm
+3 dBm
-9 dBm
20
2550
-40
INPUT BASEBAND AMPLITUDE (Vp-p diff)
40
-20
2500
-100
32
28
-20
-70
0.1
3
Output Power, Output IP3 & Sideband
Suppression vs. Freq. over LO Power [1]
OUTPUT IP3
24
-30
INPUT BASEBAND AMPLITUDE (Vp-p diff)
30
20
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
2750
2800
SIDEBAND SUPPRESSION (dBc)
OUTPUT POWER (dBm)
OP1dB 11.1 dBm
1
16
Carrier Feedthrough & Sideband
Suppression @ 2960 MHz vs. Input Baseband Amplitude over Temperature [1]
20
-20
0.1
-90
ATTENUATION (dB)
Output Power & Output Noise
@ 2960 MHz vs. Input Baseband
Amplitude over Temperature [1]
10
-60
CARRIER
FEEDTHROUGH
ATTENUATION (dB)
+25 C
+85 C
-40 C
-40
-30
-80
0
-180
32
28
OUTPUT NOISE @ 20 MHz (dBm/Hz)
modulators - direct quadrature - SMT
-140
OUTPUT POWER
-30
SIDEBAND
SUPPRESSION
SIDEBAND SUPPRESSION (dBc)
0
-130
OUTPUT NOISE @ 20 MHz (dBm/Hz)
+25C
+85C
-40C
10
10
-10
-120
CARRIER FEEDTHROUGH (dBm)
20
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Output Power, Output IP3 & Sideband Suppression vs. Freq. over Supply Voltage [1]
OUTPUT IP3
20
-30
-10
-35
-20
OUTPUT POWER
10
-30
SIDEBAND SUPPRESSION
0
-40
-10
-50
-20
2500
2550
2600
2650
2700
UNCALIBRATED
-40
-45
-50
10
4.5 V
5.0 V
5.5 V
-55
-60
2800
2750
CALIBRATED
-60
2500
2550
FREQUENCY (MHz)
2600
2650
2700
2750
2800
FREQUENCY (MHz)
Absolute Error [2] vs. Frequency
Normalized Attenuation vs. Frequency
(Only Major States are Shown)
(only Major States are Shown)
0
1
0.5
-10
ABSOLUTE ERROR (dB)
NORMALIZED ATTENUATION (dB)
-5
-15
-20
-25
0
-0.5
-30
-35
0
0.5
1
1.5
2
-1
2.5
0
0.5
FREQUENCY (GHz)
vs. Attenuation State
0.5
0.25
0.25
2.5 GHz
2 GHz
1 GHz
50 MHz
2.5
2
2.5
0
-0.25
-0.25
-0.5
2
(Only Major States are Shown)
0.5
0
1.5
Step Error [3] vs. Frequency
STEP ERROR (dB)
ABSOLUTE ERROR (dB)
Absolute Error
[2]
1
FREQUENCY (GHz)
0
4
8
12
16
20
24
28
32
-0.5
0
ATTENUATION (dB)
0.5
1
1.5
modulators - direct quadrature - SMT
POWER (dBm) & IP3 (dBm)
30
0
SIDEBAND SUPPRESSION (dBc)
4.5V
5.0V
5.5V
CARRIER FEEDTHROUGH (dBm)
40
Uncalibrated & Calibrated Carrier Feedthrough vs. Freq. over Supply Voltage [1]
FREQUENCY (GHz)
[1] Output Matched to 2960 MHz
[2] Absolute error - difference between measured and ideal attenuation
[3] Step error - difference between measured attuation step and ideal step of 0.5 dB
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10 - 8
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
10
RF Return Loss vs. Attenuation
0.15
0
0.1
-5
RF RETURN LOSS (dB)
STEP ERROR (dB)
Step Error vs. Attenuation
0.05
0
-0.05
50 MHz, 1 GHz, 2 GHz, 2.5 GHz
-0.1
-0.15
0
4
8
12
16
-10
1000MHz
-15
2690MHz
-20
-25
20
24
28
-30
32
1950 MHz
0
4
8
12
16
20
24
28
RF Return Loss vs. Frequency Offset,
VGA Attenuation 0 dB
LO Return Loss vs. Frequency
0
0
1000MHz
-5
RETURN LOSS (dB)
RETURN LOSS (dB)
-10
-20
-10
2690MHz
-15
-20
-30
1950MHz
SINGLE-ENDED LO
-40
-25
DIFFERENTIAL LO
WITH BD2326 BALUN
0
1
2
3
4
-30
-150
5
-100
FREQUENCY (GHz)
0
50
100
150
OFFSET FREQUENCY (MHz)
ACPR for W-CDMA @ 2140 MHz
vs. Output Power for Various Input Levels,
VGA Attenuation 0 dB [1]
ACPR for W-CDMA @ 2140 MHz
vs. Output Power & VGA Attenuation for
Various Input Levels [1]
-50
-30
-60
0 dB
-40
-55
ADJACENT CH.
ACPR
ACPR
-50
-60
ACPR (dB)
ACPR (dBc)
-50
-65
-60
31.5dB
31.5dB
-70
0 dB
65mV (rms)
-120
0 dB
37mV (rms)
-70
ALTERNATE CH.
ACPR
-80
-100
110mV (rms)
-140
0 dB
-80
-160
28dB
-75
-15
-10
-5
CARRIER OUTPUT POWER (dBm)
0
-90
-40
OUTPUT NOISE
-30
-20
-10
0
CARRIER OUTPUT POWER (dBm)
[1] W-CDMA (Modulation Set-up for ACPR Mode): The baseband I and Q input signals were generated using “Test Model 1 with 64 channels
10 - 9
32
ATTENUATION STATE (dB)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
-180
10
OUTPUT NOISE @ 20 MHz (dBm/Hz)
modulators - direct quadrature - SMT
ATTENUATION (dB)
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Truth Table
VCCMIX, VCCBG, VCCRF, VCCDAC
-0.3V to +5.5V
VDD3
-0.3V to +3.6V
LO Input Power
+18 dBm
Baseband Input Voltage (DC)
0V to +1.4V
Baseband Input Voltage (AC + DC)
0V to +1.8V
Maximum Junction Temperature
125 °C
Continuous Pdiss (T = 85°C)
(derate 25 mW/°C above 85°C)
1W
Thermal Resistance (Rth)
(junction to ground paddle)
40 °C/W
Storage Temperature
-65 to +150 °C
Operating Temperature
-40 to +85 °C
Reflow Soldering
Peak Temperature
260 °C
ESD Sensitivity (HBM)
Class 1B
Control Voltage Input
AGC5
AGC4
AGC3
AGC2
AGC1
AGC1
Attenuation
Low
Low
Low
Low
Low
Low
0 dB
Low
Low
Low
Low
Low
High
0.5 dB
Low
Low
Low
Low
High
Low
1 dB
Low
Low
Low
High
Low
Low
2 dB
Low
Low
High
Low
Low
Low
4 dB
Low
High
Low
Low
Low
Low
8 dB
High
Low
Low
Low
Low
Low
16 dB
High
High
High
High
High
High
31.5 dB
Any combination of the above states will provide an increase in the
attenuation approximately equal to the sum of the bits selected
Stresses above those listed under Absolute Maximum Ratings may
cause permanent damage to the device. This is a stress rating only;
functional operation of the device at these or any other conditions
above those indicated in the operational section of this specification
is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS]
3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED LAND PATTERN.
Package Information
Part Number
Package Body Material
Lead Finish
HMC795LP5E
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL Rating
MSL1
Package Marking [1]
[2]
10
modulators - direct quadrature - SMT
Absolute Maximum Ratings
H795
XXXX
[1] 4-Digit lot number XXXX
[2] Max peak reflow temperature of 260 °C
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10 - 10
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Pin Descriptions
modulators - direct quadrature - SMT
10
10 - 11
Pin Number
Function
Description
1
RstB
Digital reset input, active low
2
VCCRF
Supply voltage for the output driver,
5V, 24mA @ max gain, 0.7mA @ min gain
3, 6, 19, 22
GND
These pins and the ground paddle should be
connected to a high quality RF/DC ground.
4, 5
RFN, RFP
Differential RF open collector output, needs pull up
inductor to VCCRF and DC coupling capacitor on both
pins, 5V, 0.5mA @min gain, 24.4mA @ max gain
7, 8, 9, 10,
11, 12
AGC0, AGC1,
AGC2, AGC3,
AGC4, AGC5
Parallel binary input gain control word
13
VCCDAC
Supply voltage for the DAC, 3.9mA @ 5V
14, 15
QP, QN
Q channel differential baseband input. These high
impedance ports should be biased at 1.3V. Nominal
recommended baseband input is 1.4V pp differential
16, 25
VCCMIX
Supply voltage for the I/Q mixers, 31.7mA @ 5V
17
N/C
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
18
VCCLO
Supply voltage for the LO chain, 65.2mA @ 5V
Interface Schematic
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Pin Descriptions (Continued)
Function
Description
20, 21
LOP, LON
LO inputs. Need DC decoupling capacitors. The ports
could be driven single ended or differentially
23
VCCBG
Supply voltage for the bandgap, 4.3mA @ 5V
Interface Schematic
External bypass decoupling for
precision bias circuits, 3.80V
24
DECOUPLE
26, 27
IN, IP
I channel differential baseband input. These high
impedance ports should be biased at 1.3V. Nominal
recommended baseband input is 1.4V pp differential
28
VDD3
Supply voltage for the digital
29
SDO
Main Serial port data output
30
SDI
Main Serial port data input
31
SEN
Main Serial port latch enable input
32
SCK
Main Serial port clock input
NOTE: BIAS ref voltage cannot drive an external load. Must
be measured with 10GOhm meter such as Agilent 34410A,
normal 10Mohm DVM will read erroneously.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
Pin Number
10 - 12
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Evaluation PCB
modulators - direct quadrature - SMT
10
10 - 13
The circuit board used in the application should use RF circuit design techniques. Signal lines should have
50 ohm impedance while the package ground leads and exposed paddle should be connected directly to the
ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and
bottom ground planes. The evaluation circuit board shown is available from Hittite upon request.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
List of Materials for Evaluation PCB [1]
Description
Item
Description
J1, J10
2 Pin DC Connector
R7
10 kOhm Resistor, 0402 Pkg
J2, J3, J5 - J8
PCB Mount SMA Connector
J4
12 Pin DC Connector
R8, R9, R12 - R20,
R22, R23, R25, R26,
R28, R29
Do Not Populate
J9
12 Pin Socket Connector
R10
4 kOhm Resistor, 0402 Pkg
C1, C4, C8, C10, C14, C15,
C18, C20, C23, C34, C35,
C38
1 µF Capacitor, 0402 Pkg
C2
C3, C5, C6, C11, C12
R11
1 kOhm Resistor, 0402 Pkg
T1, T2
RF Transformer
10 µF Capacitor, 1206 Pkg
TP1 - TP3
DC Pin
4.7 µF Capacitor, 0805 Pkg
FB1 - FB3
1 kOhms Ferrite Bead, 0805 Pkg
L1, L3
10 nH Inductor, 0402 Pkg
L2, L6
4.7 nH Inductor, 0402 Pkg
C7, C16, C17, C22, C24,
C25, C28, C33, C36, C37,
C40
1 nF Capacitor, 0402 Pkg
C9, C21
10 nF Capacitor, 0402 Pkg
C13
1.2 nF Capacitor, 0402 Pkg
C19, C27, C32, C41
100 pF Capacitor, 0402 Pkg
C26, C30 - C31, C39, C42
Do Not Populate
R1, R4, R21, R24, R27,
R30 - R32
100 kOhm Resistor, 0402 Pkg
R2, R3, R5, R6
0 Ohm Resistor, 0402 Pkg
U1
Linear Regulator, 3.3V
U2
Linear Regulator, 5V
U3
HMC795LP5E Modulator
PCB [2]
125087 Eval Board
[1] When requesting an evaluation board, please reference the
appropriate PCB number listed in the table “Components for the
Selected Frequencies”
[2] Circuit Board Material: Arlon 25FR / FR4
Table 9. Components for Selected Frequencies
Tuned Frequency
850 MHz
1950 MHz
2960 MHz
Evaluation Board Number
127433
125370
130190
[1]
129934
129935
130186
47 nH
4.7 nH
1.8 nH
Evaluation Kit Number
L2, L6
L1, L3
27 nH
10 nH
5.6 nH
R29
2.5 kOhms
DEPOP
DEPOP
T1
TCN2-14
TCN2-26
TCN2-26
[1] Evaluation Kit includes evaluation board, USB controller board, USB cable and evaluation software.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
Item
10 - 14
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Application & Evaluation PCB Schematic
modulators - direct quadrature - SMT
10
10 - 15
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Theory of Operation
The HMC795LP5E modulator consists of the following functional blocks
1. LO Interface
2. I/Q modulator
3. Digitally controlled variable gain amplifier
4. Gain control DAC
5. Bias Circuit
6. Serial Port interface
The LO interface consists of a gain stage followed by a divide by 2 stage that generates two carrier signals in quadrature which are used to drive the mixers. As a result, the LO path is immune to large variations in the LO signal
level and the modulator performance does not vary much with LO power. Due to the on chip divider, the input LO
frequency must be twice that of the desired carrier frequency. This offers the advantage of significantly lowering
carrier feedthrough.
The LO port can be driven differentially or single ended if the unused side is AC grounded. However, when driven
single-endedly, the carrier feedthrough and sideband rejection can be degraded by either large 2nd order LO tones,
such as when driven by a VCO with a divider output, or, by large half-harmonic tones, such as when driven by a VCO
with a doubler output.
The LO interface can be enabled/disabled separately through the serial port interface using Reg01h <0> and can be
used to disable the modulator output. The RF output signal is suppressed by 100 dB when only the LO interface is
disable and the LO signal itself is suppressed approximately 60 dB. In addition, the LO buffer bias can be increased
using Reg02h <7>. This setting is recommended for LO frequencies above 5 GHz.
I/Q Modulator
The HMC795LP5E has two double-balanced mixers, one for the in-phase channel and one for the quadrature channel. The differential baseband inputs (QP, QN, IP, and IN) consist of the bases of NPN transistors, which present a
high impedance. The DC common mode voltage at the baseband inputs sets the currents in the two mixer cores.
Varying the baseband common mode voltage varies the current in the mixers and affects the overall modulators
performance. The recommended DC voltage for the baseband common mode voltage is 1.3V DC, ± 0.1V.
The output of the two mixers are summed together differentially and then used to drive the differential input of the VGA
stage. The mixer can be enabled/disabled with Reg01h <1>. The external baseband DC bias also need to be disabled
to completely disable the mixers. Disabling the mixer enables a weak pull down at the mixer inputs which connects
the mixer inputs through a resistive path to ground. This may pull the external input low resulting in large current flow
if the external bias is not disabled.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
LO Interface
10 - 16
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Digitally Controlled Variable Gain Amplifier
modulators - direct quadrature - SMT
10
10 - 17
10
-50
5
-60
0
-70
-5
-80
MAGNITUDE
-10
PHASE
-90
-15
-100
-20
-110
-25
-120
-30
0
4
8
12
16
20
24
28
32
S21 PHASE (deg)
S21 MAGNITUDE (dB)
The output of the HMC795LP5E is a 6 bit, digitally controlled, variable gain amplifier that can provide very accurate
linear- in-dB gain control over a 31.5 dB range in 0.5 dB steps. The VGA also provides relatively constant phase over
the entire gain range, as shown in Figure 1. An 11 bit DAC is used to control the VGA. See the Gain Control DAC
section for more detail about gain control.
-130
ATTENUATION (dB)
Figure 1. VGA S21 magnitude and phase @ 2 GHz vs attenuation
For maximum performance and flexibility, the output ports of the VGA are differential open collectors that require
pull up inductors to the positive supply and external matching components. The evaluation board allows for several
options for matching. See the Output Matching section for more details.
The VGA can be enabled/disabled separately through the SPI using Reg01h <2>. The ON/OFF isolation of the VGA
is greater than 60 dB for RF output frequencies up to 2.5 GHz.
Gain Control DAC
An 11 bit DAC is used to control the VGA for linear-in-dB gain control, Figure 2 shows the control for the DAC.. The
DAC is normally controlled by a look up table (LUT) that is in turn, controlled by the 6 bit parallel port. The values of
the look up table are fixed to give 0.5 dB steps over a 31.5 dB gain range.
Figure 2. Simplified DAC control diagram
For increased flexibility, there are three methods to control the DAC and VGA gain.
1. Parallel Mode Use the 6 bit parallel port to provide fixed 0.5 dB gain steps. In this mode the DAC
is controlled by a look up table with 64 states that map the 6 bit parallel port to fixed 11-Bit gain
words for each state. The values of the LUT are fixed to give nominally 0.5 dB attenuation steps
over a 31.5 dB gain range.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
2. Correction Mode Use the SPI port in conjunction with the 6 bit parallel port to apply a 4 bit,
2’s complement, correction factor to any attenuation step. This option can be used to compensate
the gain control for systematic variations in the transmit chain by adding negative or positive correction
factors to any of the fixed LUT values to either slightly increase or decrease the gain step for that particulate
state. This mode requires the host controller to write the desired corrections to the SPI after the chip is
powered up. The correction factors are then applied to the desired gain steps when ever the parallel port gain
control changes, until the chip is powered down.
COR(dB) = 10 · log10
[(
1+
(CORword · mult)
LUTword
-1
) ]
where mult is the correction multiplication factor, and CORword and LUTword are the decimal equivalent
of the binary correction and LUT word. An expression for determining the LUTword is given in the bypass
mode section below. Figures 3, 4 and 5 show the range of correction in dB for 4 dB, 16 dB and 31.5 dB
attenuation and Figure 6 shows the output power versus attenuation for no correction, maximum positive
and maximum negative correction applied to all states in the LUT. The LUT value for 0 dB attenuation can
only be decreased since it already at maximum. Increasing the word value will cause an overflow resulting
in maximum attenuation instead.
1
0.3
X3
X4
ATTENUATION CHANGE (dB)
ATTENUATION CHANGE (dB)
0.2
X2
0.1
X1
0
-0.1
-0.2
-0.3
-8
-6
-4
-2
0
2
4
6
8
X3
0.5
X4
X2
X1
0
-0.5
-1
-8
-6
-4
-2
0
2
4
6
8
LUT CORRECTION WORD
LUT CORRECTION WORD
Figure 3. Attenuation Change from 4 dB Attenuation
vs. LUT Correction Word over Different
Multiplication Factors
Figure 4. Attenuation Change from 16 dB Attenuation
vs. LUT Correction Word over Different
Multiplication Factors
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
The 4 bit, 2’s compliment, correction factor for each line in the LUT are set by Reg4h to Reg13h.
The correction factor for 0 dB attenuation (line 0) is set in Reg4h <3:0>, 0.5 dB (line 1) is set by
Reg4h <7:4>, 1.0 dB (line 2) by Reg4h<11:8> and so on until Reg13h <15:12> which sets the correction factor for 31.5 dB attenuation. If more adjustment is needed, the LUT correction values can
be increased by a factor of 2, 3, or 4 times by using Reg2h <15:8>. Reg2h <9:8> sets the multiplication factor
for the first quadrant of the LUT, lines 0 to 15, <11:10> for lines 16 to 31, <13:12> for lines 32 to 47 and <15:14>
for the last quadrant, lines 48 to 63. The correction in dB can be estimated by
10 - 18
HMC795LP5E
10 - 19
8
10
6
5
4
X1
2
X2
X3
0
X4
0
-2
-4
-8
-5
MAX +VE
CORRECTION
-10
-15
MAX -VE
CORRECTION
-20
-25
-6
-30
-8
-6
-4
-2
0
2
4
6
8
0
4
8
12
16
20
24
28
32
LUT CORRECTION WORD
ATTENUATION (dB)
Figure 5. Attenuation Change from 31.5 dB
Attenuation vs. LUT Correction Word over Different
Multiplication Factors
Figure 6. Output Power @ 850 MHz vs. VGA
Attenuation for no Correction, Maximum Positive &
Maximum Negative Correction Values
3. Bypass Mode. Use the SPI port to bypass the parallel port and LUT completely. In this mode Reg2h<4>
is set to enable the bypass mode. The host controller can then write the desired gain word to the SPI using
Reg3h<10:0> for each and every desired gain change. The input word can be determined from the desired
gain (in dB) by
LUTword(10:0) = dec2bin[round[(211 - 1) · 10 (-attn)/20]]
and is plotted in Figure 7. In the this mode it is possible to use much lower attenuation steps over a reduced
gain control range. The limit for reliable attenuation steps is 0.1 dB with a gain control range of approximately
22 dB.
32
28
24
ATTENUATION (dB)
modulators - direct quadrature - SMT
10
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
OUTPUT POWER (dBm)
ATTENUATION CHANGE (dB)
v00.0409
20
16
12
8
4
0
0
500
1000
1500
2000
LUT WORD
Figure 7. Attenuation vs. LUT word
The DAC can be enabled/disabled separately through the serial port interface using bit 3 of register 01h. Disabling the
DAC will also disable the VGA.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Bias Circuit
A band gap reference circuit generates the reference currents used by the different sections. The bias circuit can be
disabled with Reg01h <4>. Disabling the bias circuit will also disable the reference currents to all the other sections
except the mixers, since they use an external bias. An external pin, pin 24, is also provided to allow for external
decoupling for low noise performance, 100nF is recommended.
Power on Reset and Soft Reset
Serial Port Interface
The HMC795LP5E features a four wire serial port for simple communication with the host controller. Register types
may be Read Only, Write Only, or Read/Write, as described in the registers descriptions. Typical serial port operation
can be run with SCK at speeds up to 50 MHz. The HMC795LP5E chip address is fixed as “4d” or “100b”.
Serial Port WRITE Operation
A typical WRITE cycle is shown in Figure 8. It is 40 clock cycles long.
1. The host both asserts SEN (active low Serial Port Enable) and places the MSB of the data on SDI followed
by a rising edge on SCLK.
2. HMC795LP5E reads SDI on the 1st rising edge of SCLK after SEN.
3. HMC795LP5E registers the data bits in the next 29 rising edges of SCLK.
4. Host places the seven register address bits on the next seven falling edges of SCLK, MSB first.
5. HMC795LP5E registers the register address bits in the next seven rising edges of SCLK.
6. Host places the 3 chip address bits <100> on the next 3 falling edges of SCLK, MSB first.
7. HMC795LP5E registers the chip address bits in the next 3 rising edges of SCLK.
8. SEN is de-asserted on the 40th falling edge of SCLK. This completes the WRITE cycle.
9. HMC795LP5E also exports data back on the SDO line. For details see the section on READ operation.
The host changes the data on the falling edge of SCLK and the HMC795LP5E reads the data on the rising
edge.
Serial Port READ Operation
The SPI can read from the internal registers in the chip. The data is available on SDO line. This line itself is tri-stated
after power up. After a WRITE cycle, the HMC795LP5E controls the SDO line and exports data on this line during the
current WRITE cycle. The HMC795LP5E chip address is fixed as ‘4d’ or ‘100b’
A READ operation is always preceded by a WRITE operation to Register 0 to define the register to be queried.
Every READ cycle is also a WRITE cycle in that data sent to the SPI while reading the data will also be stored by the
HMC795LP5E when SEN goes high. If this is not desired then it is suggested to write to Register 0 during the READ
operation as the status of the device will be unaffected.
A typical READ cycle is also shown in Figure 8. A read cycle is 40 clock cycles long. To specifically read a register, the
address of that register must be written in the register 0. A read cycle can then be initiated as follows;
10
modulators - direct quadrature - SMT
The HMC795LP5E features a hardware Power On Reset (POR). All chip registers will be reset to default states
approximately 250 us after power up. The SPI registers may also be hardware reset by holding RSTB, pin 1, low, or
software reset by writing 80h to Reg00h followed by writing 00h to Reg00h.
1. The host asserts SEN (active low Serial Port Enable) followed by a rising edge SCLK.
2. HMC795LP5E reads SDI (the MSB) on the 1st rising edge of SCK after SEN.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10 - 20
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
3. HMC795LP5E registers the data bits in the next 29 rising edges of SCLK (total of 30 data bits). The
LSBs of the data bits represent the address of the register that is intended to be read.
4. Host places the 7 register address bits on the next 7 falling edges of SCLK (MSB to LSB) while the
HMC795LP5E reads the address bits on the corresponding rising edge of SCK. For a read operation this
is “0000000”.
5. Host places the 3 chip address bits <100> on the next 3 falling edges of SCK (MSB to LSB). Note
the HMC795LP5E chip address is fixed as “4d” or “100b”.
modulators - direct quadrature - SMT
10
10 - 21
6. SEN goes from low to high after the 40th rising edge of SCK. This completes the first portion of the
READ cycle.
7. The host asserts SEN (active low Serial Port Enable) followed by a rising edge SCLK.
8. HMC795LP5E places the 30 data bits, 7 address bits, and 3 chip id bits on the SDO on each rising
edge of the SCK commencing with the first rising edge beginning with MSB.
9. The host de-asserts SEN (i.e. sets SEN high) after reading the 40 bits from the SDO output. The 32
bits consists of 30 data bits, 7 address bits, and the 3 chip id bits. This completes the READ cycle.
Figure 8. SPI Timing Diagram for write and read operation
Main SPI Timing Characteristics DVDD = +3.3V ±10%, GND = 0V
Parameter
Conditions
Min.
Typ.
Max
Units
t1
SEN to SCK setup time
8
nsec
t2
SDI to SCK setup time
8
nsec
t3
SDI to CLK hold time
8
nsec
t4
SCK high duration
8
nsec
t5
SCK low duration
8
nsec
t6
SEN low duration after 40th CLK
20
nsec
t7
SEN high duration
20
nsec
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Output Matching
The output ports of the VGA are differential open collectors that require pull up inductors to the positive supply and
external matching components. The evaluation board uses a 2:1 impedance transformer to convert the differential
output to single ended for evaluation purposes. Three options are available for the evaluation board, each with
different matching components, one for 850 MHz, one for 1950 MHz, and another for 2690 MHz. When requesting
an evaluation board, please reference the appropriate PCB number listed in the table “Components for the Selected
Frequencies”
Figure 9. Simple output matching network
0
10
NARROW BAND
DIFFERENTIAL
NARROW BAND
DIFFERENTIAL
-5
OUTPUT POWER (dBm)
RETURN LOSS (dB)
-10
-15
-20
WIDE BAND
-25
DIFFERENTIAL
DIFFERENTIAL
-35
-40
[1]
WIDE BAND
-30
[2]
WIDE BAND
DIFFERENTIAL
5
[2]
WIDE BAND
SINGLE ENDED
WIDE BAND
DIFFERENTIAL
0
[1]
-5
WIDE BAND
SINGLE ENDED
0
500
1000
1500
2000
2500
FREQUENCY (MHz)
Figure 10. Output Return Loss for Various
Matching Options
3000
-10
0
500
1000
1500
2000
2500
3000
3500
FREQUENCY (MHz)
Figure 11. Output Power for Various
Matching Options
[1] With TCN2-14 Transformer
[1] With TCN2-14 Transformer
[2] With TCN2-26 Transformer
[2] With TCN2-26 Transformer
A narrow band solution, with higher output power, is possible by using a simple L-match network, as shown in
Figure 12. A shunt resistor is included to control the Q of the matching network and sets the output power of the
HMC795LP5E. Consequently a low value resistor will result in a broadband match but lower output power than a
high value resistor. The table below provides recommend component values for various output frequencies with
a bandwidth of approximately 5-10%. It is also possible to use an LC matching network where L2 is removed and
the DC blocking capacitor is used as a matching component. Experiments show that the output power is reduced
approximately 1 -2 dB though and that values for the capacitors become unrealistic (< 500 fF) above 2 GHz.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
There are a number of ways to match the RF output of the HMC795LP5E for optimum performance. The most basic
method is to use a 50 Ω resistor to Vcc and a 1 nF dc bypass capacitor connected in series as shown Figure 9(a). This
option provides a good broadband match, see Figure 10, but limits the maximum output power, compared to a narrow
band match, see Figure 11. Single-ended operation is possible by using a transformer, which can limit the bandwidth,
as seen in the output power plot, or by using only one side of the differential output. However, biasing for the unused
side is still required. For best performance it is recommended to terminate the unused side with the same matching
and load impedance as the used side, see Figure 9(b). Output power is generally reduced by 2 to 3 dB for singleended operation, as shown in Figure 11.
10 - 22
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Figure 12. Simple output matching network
modulators - direct quadrature - SMT
10
10 - 23
Recommending Matching Components
450 MHz
850 MHz
1450 MHz
1850 MHz
1950 MHz
L1
270 nH
L2
82 nH
2400 MHz
2500 MHz
47 nH
12 nH
5.6 nH
27 nh
12 nH
12 nH
2690
4.7 nH
2.7 nH
2.2 nH
1.8 nH
10 nH
6.8 nH
5.6 nH
5.6 nH
R1
-
2.4K
2.4K
-
-
-
-
-
T1
Bypassed
TCN2-14
TCN2-14
TCN2-26
TCN2-26
TCN2-26
TCN2-26
TCN2-26
DAC Modulator Interface Network
The HMC795LP5Eis capable of interfacing with a variety of popular D/A Convertors. Most DAC have differential
outputs with a source or sink current of 0 mA to 20 mA. However, most DACs require a different output compliance
voltage than that of the DC input bias level for the HMC795LP5E. A passive interface network can be used to transform
the common-mode voltage of the DAC to the desired DC input bias of the modulator of 1.3V. Figures 13 and 14 show
the interface network for two different topologies.
1. Topology 1. DAC Vcm > HMC795LP5E Vcm. This topology is used shift the DAC output common
mode voltage down to the required DC level at the modulator input.
2. Topology 2. DAC Vcm < HMC795LP5E Vcm. This topology is used shift the DAC output common
mode voltage up to the required DC level at the modulator input.
The resistive level-shifting network is not frequency sensitive but the resistive divider network inherent in the network
attenuates the baseband signal. The bypass capacitors shown Figures 13 and 14 will eliminate the attenuation for
frequencies greater than 3 kHz. Either topology can be used on the HMC795LP5E evaluation board.
Figure 13. DAC Interface network topology 1
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
10
Figure 14. DAC Interface network topology 2
DAC Interface Network Values
Topology 1
Topology 2
DAC Vcm
3.3
0.5
R1
62 Ω
36 Ω
R2
130 Ω
200 Ω
R3
82 Ω
910 Ω
Register Map
Reg 01h - Enable / Control Register
Bit
Width
Default
[0]
enLO
Name
1
1
enables LO path
Description
[1]
enMix
1
1
enables Mixer LO bias
- see I/Q modulator section for more detail
[2]
enDrvr
1
1
enables output driver
[3]
enDAC
1
1
enables gain control DAC
[4]
enBias
1
1
enables bandgap and bias
Reg 02h - Function Register
Width
Default
[1:0}
Bit
Reserved
2
00
Reserved
[3:2]
Reserved
2
00
Reserved
LUT Bypass
1
0
Allows direct control of the gain control DAC
via the DAC word in Reg03
Reserved
2
00
Reserved
LO Buffer Bias
1
0
Increases the LO buffer bias current by
approximately 7.5mA
00
Multiplication factor for correction to
attenuation settings 0 to 7.5dB
00: x1 (default)
01: x2
10: x3
11: x4
[4]
[6:5]
[7]
[9:8]
Name
mult_0
2
Description
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
modulators - direct quadrature - SMT
v00.0409
10 - 24
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Reg 02h - Function Register
Bit
[11:10]
modulators - direct quadrature - SMT
10
10 - 25
[13:12]
Name
Width
mult_1
2
mult_2
2
Default
Description
00
Multiplication factor for lines 16 - 31 of LUT
(2nd Quadrant)
00: x1 (nom)
01: x2
10: x3
11: x4
00
Multiplication factor for correction to
attenuation settings 16 to 23.5dB
00: x1 (default)
01: x2
10: x3
11: x4
00
Multiplication factor for correction to
attenuation settings 24 - 31.5dB
00: x1 (default)
01: x2
10: x3
11: x4
[15:13]
mult_3
2
[17:16]
Reserved
2
00
Reserved
[21:18]
Reserved
4
0000
Reserved
Width
Default
Reg 03h - Gain Control
Bit
Name
Description
Gain control DAC input word. LUT bypass bit
in register 2h must be enabled.
[10:0]
idac
11
000h
Gain control DAC word consists of an 11bit
input word where 7FFh is maximum gain and
36h corresponds to minimum gain.
Neglecting DAC error, the input word can be
determined from the desired gain (in dB) as
follows:
idac<10:0>=dec2bin(round((2^(11)
1)*10^(gain/20)))
Reg 04h - LUT Correction 0 - 3
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 0 -15 (attenuation 0 to 7.5 dB) is set in Reg2 by bits mult_0 [9:8]
Bit
[3:0]
Name
LUT_0
Width
Default
4
0000
Description
2’s complement 4bit correction to LUT line 0 (attenuation 0 dB)
[7:4]
LUT_1
4
0000
2’s complement 4-bit correction to LUT line 1 (attenuation 0.5 dB)
[11:8]
LUT_2
4
0000
2’s complement 4-bit correction to LUT line 2 (attenuation 1 dB)
[15:12]
LUT_3
4
0000
2’s complement 4-bit correction to LUT line 3 (attenuation 1.5 dB)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Reg 05h - LUT Correction 4 - 7
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 0 -15 (attenuation 0 to 7.5 dB) is set in Reg2 by bits mult_0 [9:8]
Name
Width
Default
Description
[3:0]
LUT_4
4
0000
2’s complement 4-bit correction to LUT line 4 (attenuation 2 dB)
[7:4]
LUT_5
4
0000
2’s complement 4-bit correction to LUT line 5 (attenuation 2.5 dB)
[11:8]
LUT_6
4
0000
2’s complement 4-bit correction to LUT line 6 (attenuation 3 dB)
[15:12]
LUT_7
4
0000
2’s complement 4-bit correction to LUT line 7 (attenuation 3.5 dB)
Reg 06h - LUT Correction 8 - 11
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 0 -15 (attenuation 0 to 7.5 dB) is set in Reg2 by bits mult_0 [9:8]
Bit
Name
Width
Default
Description
[3:0]
LUT_8
4
0000
2’s complement 4-bit correction to LUT line 8 (attenuation 4 dB)
[7:4]
LUT_9
4
0000
2’s complement 4-bit correction to LUT line 9 (attenuation 4.5 dB)
[11:8]
LUT_10
4
0000
2’s complement 4-bit correction to LUT line 10 (attenuation 5 dB)
[15:12]
LUT_11
4
0000
2’s complement 4-bit correction to LUT line 11 (attenuation 5.5 dB)
Reg 07h - LUT Correction 12 - 15
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 0 -15 (attenuation 0 to 7.5 dB) is set in Reg2 by bits mult_0 [9:8]
Bit
Name
Width
Default
Description
[3:0]
LUT_12
4
0000
[7:4]
LUT_13
4
0000
2’s complement 4-bit correction to LUT line 12 (attenuation 6 dB)
2’s complement 4-bit correction to LUT line 13 (attenuation 6.5 dB)
[11:8]
LUT_14
4
0000
2’s complement 4-bit correction to LUT line 14 (attenuation 7 dB)
[15:12]
LUT_15
4
0000
2’s complement 4-bit correction to LUT line 15 (attenuation 7.5 dB)
Reg 08h - LUT Correction 16 - 19
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 16 - 31 (attenuation 8 to 15.5 dB) is set in Reg2 by bits mult_0 [11:10]
Width
Default
[3:0]
Bit
LUT_16
Name
4
0000
2’s complement 4-bit correction to LUT line 16 (attenuation 8 dB)
Description
[7:4]
LUT_17
4
0000
2’s complement 4-bit correction to LUT line 17 (attenuation 8.5 dB)
[11:8]
LUT_18
4
0000
2’s complement 4-bit correction to LUT line 18 (attenuation 9 dB)
[15:12]
LUT_19
4
0000
2’s complement 4-bit correction to LUT line 19 (attenuation 9.5 dB)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10
modulators - direct quadrature - SMT
Bit
10 - 26
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Reg 09h - LUT Correction 20 - 23
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 16 - 31 (attenuation 8 to 15.5 dB) is set in Reg2 by bits mult_0 [11:10]
Bit
[3:0]
modulators - direct quadrature - SMT
10
10 - 27
Width
Default
LUT_20
Name
4
0000
2’s complement 4-bit correction to LUT line 20 (attenuation 10 dB)
Description
[7:4]
LUT_21
4
0000
2’s complement 4-bit correction to LUT line 21 (attenuation 10.5 dB)
[11:8]
LUT_22
4
0000
2’s complement 4-bit correction to LUT line 22 (attenuation 11 dB)
[15:12]
LUT_23
4
0000
2’s complement 4-bit correction to LUT line 23 (attenuation 11.5 dB)
Reg 0Ah - LUT Correction 24 - 27
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 16 - 31 (attenuation 8 to 15.5 dB) is set in Reg2 by bits mult_0 [11:10]
Bit
[3:0]
Width
Default
LUT_24
Name
4
0000
2’s complement 4-bit correction to LUT line 24 (attenuation 12 dB)
Description
[7:4]
LUT_25
4
0000
2’s complement 4-bit correction to LUT line 25 (attenuation 12.5 dB)
[11:8]
LUT_26
4
0000
2’s complement 4-bit correction to LUT line 26 (attenuation 13 dB)
[15:12]
LUT_27
4
0000
2’s complement 4-bit correction to LUT line 27 (attenuation 13.5 dB)
Reg 0Bh - LUT Correction 28 - 31
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 16 - 31 (attenuation 8 to 15.5 dB) is set in Reg2 by bits mult_0 [11:10]
Bit
Name
Width
Default
Description
[3:0]
LUT_28
4
0000
2’s complement 4-bit correction to LUT line 28 (attenuation 14 dB)
[7:4]
LUT_29
4
0000
2’s complement 4-bit correction to LUT line 29 (attenuation 14.5 dB)
[11:8]
LUT_30
4
0000
2’s complement 4-bit correction to LUT line 30 (attenuation 15 dB)
[15:12]
LUT_31
4
0000
2’s complement 4-bit correction to LUT line 31 (attenuation 15.5 dB)
Reg 0Ch - LUT Correction 32 - 35
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 32 - 47 (attenuation 15 to 23.5 dB) is set in Reg2 by bits mult_0 [13:12]
Bit
Name
Width
Default
Description
[3:0]
LUT_32
4
0000
2’s complement 4-bit correction to LUT line 32 (attenuation 16 dB)
[7:4]
LUT_33
4
0000
2’s complement 4-bit correction to LUT line 33 (attenuation 16.5 dB)
[11:8]
LUT_34
4
0000
2’s complement 4-bit correction to LUT line 34 (attenuation 17 dB)
[15:12]
LUT_35
4
0000
2’s complement 4-bit correction to LUT line 35 (attenuation 17.5 dB)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Reg 0Dh - LUT Correction 36 - 39
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 32 - 47 (attenuation 15 to 23.5 dB) is set in Reg2 by bits mult_0 [13:12]
Width
Default
[3:0]
LUT_36
Name
4
0000
2’s complement 4-bit correction to LUT line 36 (attenuation 18 dB)
Description
[7:4]
LUT_37
4
0000
2’s complement 4-bit correction to LUT line 37 (attenuation 18.5 dB)
[11:8]
LUT_38
4
0000
2’s complement 4-bit correction to LUT line 38 (attenuation 19 dB)
[15:12]
LUT_39
4
0000
2’s complement 4-bit correction to LUT line 39 (attenuation 19.5 dB)
10
Reg 0Eh - LUT Correction 40 - 43
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 32 - 47 (attenuation 15 to 23.5 dB) is set in Reg2 by bits mult_0 [13:12]
Bit
Name
Width
Default
Description
[3:0]
LUT_40
4
0000
2’s complement 4-bit correction to LUT line 40 (attenuation 20 dB)
[7:4]
LUT_41
4
0000
2’s complement 4-bit correction to LUT line 41 (attenuation 20.5 dB)
[11:8]
LUT_42
4
0000
2’s complement 4-bit correction to LUT line 42 (attenuation 21 dB)
[15:12]
LUT_43
4
0000
2’s complement 4-bit correction to LUT line 43 (attenuation 21.5 dB)
Reg 0Fh - LUT Correction 44 - 47
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 32 - 47 (attenuation 15 to 23.5 dB) is set in Reg2 by bits mult_0 [13:12]
Bit
Name
Width
Default
Description
[3:0]
LUT_44
4
0000
2’s complement 4-bit correction to LUT line 44 (attenuation 22 dB)
[7:4]
LUT_45
4
0000
2’s complement 4-bit correction to LUT line 45 (attenuation 22.5 dB)
[11:8]
LUT_46
4
0000
2’s complement 4-bit correction to LUT line 46 (attenuation 23 dB)
[15:12]
LUT_47
4
0000
2’s complement 4-bit correction to LUT line 47 (attenuation 23.5 dB)
Reg 10h - LUT Correction 48 - 51
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 48 - 63 (attenuation 24 to 31.5 dB) is set in Reg2 by bits mult_0 [15:14]
Bit
Name
Width
Default
Description
[3:0]
LUT_48
4
0000
[7:4]
LUT_49
4
0000
2’s complement 4-bit correction to LUT line 48 (attenuation 24 dB)
2’s complement 4-bit correction to LUT line 49 (attenuation 24.5 dB)
[11:8]
LUT_50
4
0000
2’s complement 4-bit correction to LUT line 50 (attenuation 25 dB)
[15:12]
LUT_51
4
0000
2’s complement 4-bit correction to LUT line 51 (attenuation 25.5 dB)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
modulators - direct quadrature - SMT
Bit
10 - 28
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Reg 11h - LUT Correction 52 - 55
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 48 - 63 (attenuation 24 to 31.5 dB) is set in Reg2 by bits mult_0 [15:14]
Bit
modulators - direct quadrature - SMT
10
10 - 29
Name
Width
Default
Description
[3:0]
LUT_52
4
0000
2’s complement 4-bit correction to LUT line 52 (attenuation 26 dB)
[7:4]
LUT_53
4
0000
2’s complement 4-bit correction to LUT line 53 (attenuation 26.5 dB)
[11:8]
LUT_54
4
0000
2’s complement 4-bit correction to LUT line 54 (attenuation 27 dB)
[15:12]
LUT_55
4
0000
2’s complement 4-bit correction to LUT line 55 (attenuation 27.5 dB)
Reg 12h - LUT Correction 56 - 59
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 48 - 63 (attenuation 24 to 31.5 dB) is set in Reg2 by bits mult_0 [15:14]
Bit
[3:0]
Name
LUT_56
Width
Default
4
0000
Description
2’s complement 4-bit correction to LUT line 56 (attenuation 28 dB)
[7:4]
LUT_57
4
0000
2’s complement 4-bit correction to LUT line 57 (attenuation 28.5 dB)
[11:8]
LUT_58
4
0000
2’s complement 4-bit correction to LUT line 58 (attenuation 29 dB)
[15:12]
LUT_59
4
0000
2’s complement 4-bit correction to LUT line 59 (attenuation 29.5 dB)
Reg 13h - LUT Correction 60 - 63
LUT correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. Multiplication
factor for LUT lines 48 - 63 (attenuation 24 to 31.5 dB) is set in Reg2 by bits mult_0 [15:14]
Bit
[3:0]
Name
LUT_60
Width
Default
4
0000
Description
2’s complement 4-bit correction to LUT line 60 (attenuation 30 dB)
[7:4]
LUT_61
4
0000
2’s complement 4-bit correction to LUT line 61 (attenuation 30.5 dB)
[11:8]
LUT_62
4
0000
2’s complement 4-bit correction to LUT line 62 (attenuation 31 dB)
[15:12]
LUT_63
4
0000
2’s complement 4-bit correction to LUT line 63 (attenuation 31.5 dB)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC795LP5E
v00.0409
SiGe Wideband Direct Quadrature
Modulator w/ vga, 50 - 2800 MHz
Characterization Set-up
modulators - direct quadrature - SMT
10
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
10 - 30