LTC5548 - 2GHz to 14GHz Microwave Mixer with Wideband DC–6GHz IF

LTC5548
2GHz to 14GHz
Microwave Mixer with
Wideband DC– 6GHz IF
Description
Features
Upconversion or Downconversion
nn High IIP3: +24.4dBm at 5.8GHz
+21.4dBm at 9GHz
nn 7.1dB Conversion Loss at 5.8GHz
nn +15.2dBm Input P1dB at 5.8GHz
nn Integrated LO Buffer: 0dBm LO Drive
nn Selectable Integrated LO Frequency Doubler
nn Low LO-RF Leakage: <–30dBm
nn 50Ω Wideband Matched RF and LO Ports
nn 3.3V/120mA Supply
nn Fast Turn ON/OFF for TDD Operation
nn 3mm × 2mm, 12-Lead QFN Package
nn
Applications
Microwave Transceivers
Wireless Backhaul
nn Point-to-Point Microwave
nn Phased-Array Antennas
nn C, X and Ku Band RADAR
nn Test Equipment
nn Satellite MODEMs
nn
nn
The LTC®5548 is a high performance, microwave double
balanced passive mixer that can be used for frequency
upconversion or downconversion. The device is similar
to the LTC5549, but with a broadband, differential DC to
6GHz IF port. The LTC5548 is recommended for applications where the IF frequency range extends below 500MHz.
For applications where the IF frequency is always above
500MHz, the LTC5549 is recommended, since it includes
an integrated IF balun.
The LTC5548’s mixer and integrated RF balun are optimized to cover the 2GHz to 14GHz RF frequency range.
The device includes an integrated LO amplifier optimized
for the 1GHz to 12GHz frequency range, requiring only
0dBm drive. The device also includes an integrated LO
frequency doubler, which can be enabled or disabled with
a CMOS-compatible control pin.
The LTC5548 delivers exceptionally high IIP3 and P1dB,
in addition to very low LO to RF and LO to IF leakages.
The part also offers high integration in a small package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Conversion Loss and IIP3
(Low Side LO, IF = 240MHz)
LNA
RF
IF
RX
IFOUT
LO
RX
LO
DUPLEXER
TX
LO
LO
PA
RF
IF
TX
IFIN
30
CONVERSION LOSS (dB), IIP3 (dBm)
LTC5548
28
26
IIP3
24
22
20
18
DOWNMIXING
UPMIXING
16
14
12
10
CONVERSION LOSS
8
LTC5548
5548 TA01a
6
2
3
4
5
6
7
8
9
10 11 12
RF FREQUENCY (GHz)
5548 TA01b
5548f
For more information www.linear.com/LTC5548
1
LTC5548
Absolute Maximum Ratings
Pin Configuration
(Note 1)
IF +
2
IF –
3
LO
GND
12
11
10
13
GND
4
5
6
GND
1
RF
GND
GND
TOP VIEW
GND
Supply Voltage (VCC)...................................................4V
Enable Input Voltage (EN).................–0.3V to VCC + 0.3V
X2 Input Voltage (X2).......................–0.3V to VCC + 0.3V
LO Input Power (1GHz to 12GHz)................... ….+10dBm
LO Input DC Voltage ............................................. ±0.1V
RF Power (2GHz to 14GHz).................................+20dBm
RF DC Voltage ........................................................ ±0.1V
IF+/IF – Input Power (LF to 6GHz)........................+20dBm
IF+/IF – Input DC Voltage..........................................±0.3V
Operating Temperature Range (TC)......... –40°C to 105°C
Storage Temperature Range................... –65°C to 150°C
Junction Temperature (TJ)..................................... 150°C
9
VCC
8
X2
7
EN
UDB PACKAGE
12-LEAD (3mm × 2mm) PLASTIC QFN
TJMAX = 150°C, θJC = 25°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
Order Information
(http://www.linear.com/product/LTC5548#orderinfo)
Lead Free Finish
TAPE AND REEL (MINI)
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC5548IUDB#TRMPBF
LTC5548IUDB#TRPBF
LGXF
12-Lead (3mm × 2mm) Plastic QFN
–40°C to 105°C
TRM = 500 pieces.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
DC
Electrical Characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, unless otherwise noted. Test circuit shown in
Figure 1. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Requirements
Supply Voltage (VCC)
l
Supply Current Enabled
X2 = Low (LO Doubler Off)
X2 = High (LO Doubler On)
Shutdown Current
EN = Low
3.0
3.3
3.6
V
120
136
140
160
mA
mA
100
μA
Enable (EN) and LO Frequency Doubler (X2) Logic Inputs
Input High Voltage (On)
l
Input Low Voltage (Off)
l
Input Current
–0.3V to VCC + 0.3V
1.2
V
–30
0.3
V
100
μA
Chip Turn-On Time
0.2
μs
Chip Turn-Off Time
0.1
μs
2
5548f
For more information www.linear.com/LTC5548
LTC5548
AC Electrical Characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for twotone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
LO Frequency Range
l
1 to 12
GHz
RF Frequency Range
l
2 to 14
GHz
IF Frequency Range
l
DC to 6000
MHz
RF Return Loss
ZO = 50Ω, 2GHz to 13.6GHz
>9
dB
LO Input Return Loss
ZO = 50Ω, 1GHz to 12GHz
>10
dB
LO Input Power
X2 = Low
X2 = High
–6
–6
0
0
6
3
dBm
dBm
Downmixer Application with LO Doubler Off (X2 = Low), IF = 240MHz, Low Side LO
Conversion Loss
RF Input = 2GHz
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
6.0
7.1
8.5
10.2
dB
dB
dB
dB
Conversion Loss vs Temperature
TC = –40°C to 105°C, RF Input = 5.8GHz
0.006
dB/°C
2-Tone Input 3rd Order Intercept
(ΔfRF = 2MHz)
RF Input = 2GHz
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
23.1
24.4
21.4
18.7
dBm
dBm
dBm
dBm
SSB Noise Figure
RF Input = 2GHz
RF Input = 5.8GHz
RF Input = 8.5GHz
6.2
8.0
9.6
dB
dB
dB
LO to RF Leakage
fLO = 1GHz to 12GHz
<–25
dBm
LO to IF Leakage
fLO = 1GHz to 12GHz
<–26
dBm
RF to LO Isolation
fRF = 2GHz to 14GHz
>40
dB
l
RF Input to IF Output Isolation
fRF = 2GHz to 14GHz
>35
dB
Input 1dB Compression
RF Input = 5.8GHz
15.2
dBm
7.3
9.2
11.8
dB
dB
dB
0.006
dB/°C
Downmixer Application with LO Doubler On (X2 = High), IF = 240MHz, Low Side LO
Conversion Loss
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
Conversion Loss vs. Temperature
TC = –40°C to 105°C, RF Input = 5.8GHz
2-Tone Input 3rd Order Intercept
(ΔfRF = 2MHz)
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
23.9
20.9
18.3
dBm
dBm
dBm
SSB Noise Figure
RF Input = 5.8GHz
RF Input = 8.5GHz
8.9
10.8
dB
dB
l
LO to RF Input Leakage
fLO = 1GHz to 5GHz
<–30
dBm
2LO to RF Input Leakage
fLO = 1GHz to 5GHz
≤–25
dBm
LO to IF Output Leakage
fLO = 1GHz to 5GHz
<–36
dBm
2LO to IF Output Leakage
fLO = 1GHz to 5GHz
<–20
dBm
Input 1dB Compression
fRF = 5.8GHz
14.8
dBm
5548f
For more information www.linear.com/LTC5548
3
LTC5548
AC Electrical Characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for twotone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Upmixer Application with LO Doubler Off (X2 = Low), IF = 240MHz, Low Side LO
Conversion Loss
RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
6.3
7.1
9.3
10.9
dB
dB
dB
dB
Conversion Loss vs Temperature
TC = –40°C to 105°C, RF Output = 5.8GHz
0.006
dB/°C
Input 3rd Order Intercept (ΔfIF = 2MHz)
RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
26.3
24.9
21.5
17.2
dBm
dBm
dBm
dBm
SSB Noise Figure
RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 8.5GHz
7.8
8.7
10.4
dB
dB
dB
LO to RF Output Leakage
fLO = 1GHz to 12GHz
<–25
dBm
LO to IF Input Leakage
fLO = 1GHz to 12GHz
<–26
dBm
IF to LO Isolation
fIF = 500MHz to 6GHz
>50
dB
IF to RF Isolation
fIF = 500MHz to 6GHz
>40
dB
Input 1dB Compression
RF Output = 5.8GHz
15.7
dBm
Upmixer Application with LO Doubler On (X2 = High), IF = 240MHz, Low Side LO
Conversion Loss
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
7.4
9.6
12.1
dB
dB
dB
Conversion Loss vs Temperature
TC = –40°C to 105°C, RF Output = 5.8GHz
0.006
dB/°C
2-Tone Input 3rd Order Intercept
(ΔfIF = 2MHz)
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
24.9
21.3
16.8
dBm
dBm
dBm
SSB Noise Figure
RF Output = 5.8GHz
RF Output = 9GHz
10.4
12.4
dB
dB
LO to RF Output Leakage
fLO = 1GHz to 5GHz
<–30
dBm
2LO to RF Output Leakage
fLO = 1GHz to 5GHz
<–25
dBm
LO to IF Input Leakage
fLO = 1GHz to 5GHz
<–36
dBm
2LO to IF Input Leakage
fLO = 1GHz to 5GHz
<–20
dBm
Input 1dB Compression
RF Output = 5.8GHz
14.8
dBm
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC5548 is guaranteed functional over the –40°C to 105°C
case temperature range (θJC = 25°C/W).
4
Note 3: SSB noise figure measurements performed with a small-signal
noise source, bandpass filter and 2dB matching pad on input, with
bandpass filters on LO, and output.
5548f
For more information www.linear.com/LTC5548
LTC5548
Typical Performance Characteristics
Supply Current vs Case
Temperature
Supply Current vs VCC
150
X2 = HIGH
140
140
130
130
120
120
110
ICC (mA)
ICC (mA)
150
X2 = LOW
100
90
80
70
–40 –20
EN = high, test circuit shown in Figure 1.
X2 = HIGH
X2 = LOW
110
100
0
20
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
90
VCC = 3V
VCC = 3.3V
VCC = 3.6V
80
40
60
80
100 120
70
3.0
3.1
CASE TEMPERATURE (°C)
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
5548 G01
5548 G02
5548f
For more information www.linear.com/LTC5548
5
LTC5548
Typical Performance Characteristics
2GHz to 12GHz downmixer application.
VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 240MHz,
unless otherwise noted. Test circuit shown in Figure 1.
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
26
24
22
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
26
IIP3
20
18
16
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
14
12
10
8
6
4
CONVERSION LOSS
2
3
4
5
6
7
8
IIP3
22
20
18
16
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
14
12
10
8
6
4
10 11 12
9
24
CONVERSION LOSS
2
3
4
RF FREQUENCY (GHz)
5
6
7
8
10 11 12
9
RF FREQUENCY (GHz)
5548 G03
5548 G04
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
26
24
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
26
IIP3
22
20
18
16
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
14
12
10
8
CONVERSION LOSS
6
4
2
3
4
5
6
7
8
9
24
20
18
16
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
14
12
10
8
CONVERSION LOSS
6
4
10 11 12
IIP3
22
2
3
4
RF FREQUENCY (GHz)
5
6
7
8
10 11 12
9
RF FREQUENCY (GHz)
5548 G05
5548 G06
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
26
24
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
26
IIP3
22
20
18
16
VCC = 3V
VCC = 3.3V
VCC = 3.6V
14
12
10
8
6
4
CONVERSION LOSS
2
3
4
5
6
7
8
9
10 11 12
24
IIP3
22
20
18
16
VCC = 3V
VCC = 3.3V
VCC = 3.6V
14
12
10
8
CONVERSION LOSS
6
4
2
3
RF FREQUENCY (GHz)
5
6
7
8
9
10 11 12
RF FREQUENCY (GHz)
5548 G07
6
4
5548 G08
5548f
For more information www.linear.com/LTC5548
LTC5548
2GHz
to 12GHz downmixer application.
Typical
Performance Characteristics
VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 240MHz,
unless otherwise noted. Test circuit shown in Figure 1.
Conversion Loss and IIP3 vs IF
Frequency (Low Side LO)
Input P1dB vs RF Frequency
16
26
15
IIP3
24
14
22
INPUT P1dB (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
28
20
18
RF = 5.8GHz
RF = 9.8GHz
16
14
12
11
HIGH SIDE LO
LOW SIDE LO
9
8
6
12
10
CONVERSION LOSS
10
13
0
0.5
1
1.5
2
8
3
2.5
2
3
4
IF FREQUENCY (GHz)
5
6
7
8
9
5548 G09
5548 G10
LO Leakage
RF Isolation
–10
65
–20
LO-IF
–30
LO-RF
RF ISOLATION (dB)
60
LO LEAKAGE (dBm)
10 11 12
RF FREQUENCY (GHz)
–40
RF-LO
55
50
45
RF-IF
40
35
–50
1
2
3
4
5
6
7
8
30
9 10 11 12
2
3
LO FREQUENCY (GHz)
4
5
6
7
8
5548 G11
30
60
DISTRIBUTION (%)
DISTRIBUTION (%)
5.8GHz IIP3 Histogram
35
85°C
25°C
–40°C
70
10 11 12
5548 G12
5.8GHz Conversion Loss
Histogram
80
9
RF FREQUENCY (GHz)
50
40
30
20
85°C
25°C
–40°C
25
20
15
10
5
10
0
6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6
0
22.8 23.2 23.6
CONVERSION LOSS (dB)
24
24.4 24.8 25.2 25.6
IIP3 (dBm)
5548 G13
5548 G14
5548f
For more information www.linear.com/LTC5548
7
LTC5548
Typical
Performance Characteristics
2GHz to 12GHz downmixer application with LO
frequency doubler enabled. VCC = 3.3V, EN = high, X2 = high, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3
tests, Δf = 2MHz), IF = 240MHz, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
26
24
24
IIP3
22
20
18
16
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
14
12
10
8
CONVERSION LOSS
6
4
2
3
4
5
6
7
8
9
10 11 12
26
IIP3
22
20
18
16
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
14
12
10
8
CONVERSION LOSS
6
4
2
3
4
5
6
7
8
IIP3
20
18
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
8
CONVERSION LOSS
6
4
2
3
4
5
6
7
8
9
20
18
16
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
14
12
10
8
CONVERSION LOSS
6
4
10 11 12
IIP3
22
2
3
4
8
6
CONVERSION LOSS
2
3
4
5
6
7
8
10 11 12
9
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
5
6
7
8
9
24
20
18
16
VCC = 3V
VCC = 3.3V
VCC = 3.6V
14
12
10
8
6
4
10 11 12
IIP3
22
CONVERSION LOSS
2
3
4
5
6
7
8
10 11 12
9
RF FREQUENCY (GHz)
5548 G18
5548 G17
Conversion Loss and IIP3
vs IF Frequency (Low Side LO)
Input P1dB vs RF Frequency
LO and 2LO Leakage to IF
16
26
–10
IIP3
24
20
18
RF = 5.8GHz
RF = 9.8GHz
16
14
12
10
8
6
0.5
1
1.5
14
13
12
11
10
CONVERSION LOSS
0
LO AND 2LO LEAKAGE (dBm)
15
22
INPUT P1dB (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
10
RF FREQUENCY (GHz)
5548 G16
2
2.5
3
9
5548 G19
–20
2LO-IF
–30
LO-IF
–40
HIGH SIDE LO
LOW SIDE LO
2
3
4
5
6
7
8
9
10 11 12
RF FREQUENCY (GHz)
IF FREQUENCY (GHz)
8
12
26
RF FREQUENCY (GHz)
4
VCC = 3V
VCC = 3.3V
VCC = 3.6V
14
5548 G15
CONVERSION LOSS (dB), IIP3 (dBm)
24
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
26
24
10
16
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
26
12
18
5548 G14
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
14
20
RF FREQUENCY (GHz)
5548 G15
16
IIP3
22
4
10 11 12
9
24
RF FREQUENCY (GHz)
RF FREQUENCY (GHz)
22
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
CONVERSION LOSS (dB), IIP3 (dBm)
26
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
–50
1
2
3
4
5
LO FREQUENCY (GHz)
5548 G20
5548 G21
5548f
For more information www.linear.com/LTC5548
LTC5548
2GHz
to 12GHz upmixer application.
Typical
Performance Characteristics
VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 240MHz,
unless otherwise noted. Test circuit shown in Figure 1.
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
28
26
26
IIP3
24
22
20
18
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
16
14
12
10
CONVERSION LOSS
8
6
2
3
4
5
6
7
8
9
28
IIP3
24
22
20
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
18
16
14
12
10
CONVERSION LOSS
8
6
10 11 12
2
3
4
RF FREQUENCY (GHz)
5
6
7
8
9
IIP3
22
20
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
10
CONVERSION LOSS
8
6
2
3
4
5
6
7
8
9
22
20
18
14
12
10
CONVERSION LOSS
8
6
10 11 12
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
16
2
3
4
2
3
4
5
6
7
3
IF FREQUENCY (GHz)
8
9
7
8
9
10 11 12
IIP3
24
22
20
VCC = 3V
VCC = 3.3V
VCC = 3.6V
18
16
14
12
10
CONVERSION LOSS
8
6
10 11 12
2
3
4
5
6
7
8
9
10 11 12
RF FREQUENCY (GHz)
5548 G27
IF Isolation
90
16
80
15
70
14
13
12
10
0
0.5
1
1.5
2
2.5
IF-LO
60
50
IF-RF
40
30
LS LO, RF = 5.8GHz
LS LO, RF = 9.8GHz
3
IF FREQUENCY (GHz)
5548 G28
6
26
17
11
2.5
5
5548 G24
IF ISOLATION (dB)
INPUT P1dB (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS
2
CONVERSION LOSS
8
Input P1dB vs IF Frequency
RF = 5.8GHz
RF = 9.8GHz
1.5
10
5548 G26
IIP3
1
12
RF FREQUENCY (GHz)
Conversion Loss and IIP3
vs IF Frequency (Low Side LO)
0.5
14
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
IIP3
24
5548 G25
0
VCC = 3V
VCC = 3.3V
VCC = 3.6V
16
28
RF FREQUENCY (GHz)
32
30
28
26
24
22
20
18
16
14
12
10
8
6
18
RF FREQUENCY (GHz)
CONVERSION LOSS (dB), IIP3 (dBm)
26
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
28
12
20
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
26
14
22
5548 G23
28
16
IIP3
24
RF FREQUENCY (GHz)
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
18
26
6
10 11 12
5548 G22
24
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
CONVERSION LOSS (dB), IIP3 (dBm)
28
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
20
0
0.5
1
1.5
2
2.5
3
IF FREQUENCY (GHz)
5548 G29
5548 G30
5548f
For more information www.linear.com/LTC5548
9
LTC5548
Typical
Performance Characteristics
2GHz to 12GHz upmixer application with LO
frequency doubler enabled. VCC = 3.3V, EN = high, X2 = high, TC = 25°C, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-tone IIP3
tests, Δf = 2MHz), output measured at 5.8GHz, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
28
26
26
IIP3
24
22
20
18
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
16
14
12
10
CONVERSION LOSS
8
6
2
3
4
5
6
7
8
9
28
IIP3
24
22
20
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
18
16
14
12
10
CONVERSION LOSS
8
6
10 11 12
2
3
4
RF FREQUENCY (GHz)
5
6
7
8
9
20
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
12
CONVERSION LOSS
8
2
3
4
5
6
7
8
9
24
18
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
16
14
12
CONVERSION LOSS
10
8
6
10 11 12
IIP3
20
2
3
4
5
6
7
8
9
3
4
5
6
7
8
24
9
10 11 12
IIP3
22
20
18
VCC = 3V
VCC = 3.3V
VCC = 3.6V
16
14
12
CONVERSION LOSS
10
8
2
3
4
5
6
7
8
9
10 11 12
RF FREQUENCY (GHz)
5548 G33
Input P1dB vs IF Frequency
LO and 2LO Leakage to RF
–10
RF = 5.8GHz
RF = 9.8GHz
CONVERSION LOSS
LO AND 2LO LEAKAGE (dBm)
16
INPUT P1dB (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
2
5548 G35
IIP3
15
14
13
12
11
1.5
2
2.5
3
IF FREQUENCY (GHz)
10
LS LO, RF = 5.8GHz
LS LO, RF = 9.8GHz
0
0.5
1
1.5
2
2.5
3
IF FREQUENCY (GHz)
5548 G37
10
CONVERSION LOSS
8
6
10 11 12
17
1
10
RF FREQUENCY (GHz)
Conversion Loss and IIP3 vs IF
Frequency (Low Side LO)
0.5
12
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
22
5548 G34
0
14
26
RF FREQUENCY (GHz)
32
30
28
26
24
22
20
18
16
14
12
10
8
6
VCC = 3V
VCC = 3.3V
VCC = 3.6V
16
5548 G33
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
IIP3
10
18
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
22
14
20
RF FREQUENCY (GHz)
26
16
22
5548 G32
26
18
IIP3
24
RF FREQUENCY (GHz)
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
24
26
6
10 11 12
5548 G31
6
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
CONVERSION LOSS (dB), IIP3 (dBm)
28
CONVERSION LOSS (dB), IIP3 (dBm)
CONVERSION LOSS (dB), IIP3 (dBm)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
–20
2LO-RF
–30
–40
–50
LO-RF
1
2
3
4
5
6
LO FREQUENCY (GHz)
5548 G38
5548 G39
5548f
For more information www.linear.com/LTC5548
LTC5548
Pin Functions
GND (Pins 1, 4, 6, 10, 12, Exposed Pad Pin 13): Ground.
These pins must be soldered to the RF ground on the circuit
board. The exposed pad metal of the package provides
both electrical contact to ground and good thermal contact
to the printed circuit board.
EN (Pin 7): Enable Pin. When the voltage applied to this
pin is greater than 1.2V, the mixer is enabled. When the
voltage is less than 0.3V, the mixer is disabled. Typical
input current is less than 30μA. This pin has an internal
376kΩ pull-down resistor.
IF+, IF– (Pins 2, 3): Differential Terminals for the IF. These
pins may be used for a differential IF or connected to an
external balun if a single-ended IF port is needed. The IF
port can be used from DC up to 6GHz depending on the
external balun bandwidth.
X2 (Pin 8): Digital Control Pin for LO Frequency Doubler.
When the voltage applied to this pin is greater than 1.2V,
the LO frequency doubler is enabled. When the voltage DC
is less than 0.3V, the LO frequency doubler is disabled.
Typical input current is less than 30μA. This pin has an
internal 376kΩ pull-down resistor.
RF (Pin 5): Single-Ended Terminal for the RF Port. This
pin is internally connected to the primary side of the RF
transformer, which has low DC resistance to ground. A
series DC blocking capacitor must be used to avoid damage
to the integrated transformer if DC voltage is present. The
RF port is impedance matched from 2GHz to 14GHz as
long as the LO is driven with a 0 ±6dBm source between
1GHz and 12GHz.
VCC (Pin 9): Power Supply Pin. This pin must be externally
connected to a regulated 3.3V supply, with a bypass capacitor located close to the pin. Typical current consumption
is 120mA when the part is enabled.
LO (Pin 11): Input for the Local Oscillator (LO). A series
DC blocking capacitor must be used. Typical DC voltage
at this pin is 1.6V.
Block Diagram
3
LTC5548
2
IF –
IF +
X2
5
LO
AMP
RF
11
LO
MIXER
CORE
REF/BIAS
7
EN
8
X2
9
VCC
GND PINS ARE NOT SHOWN.
5548 BD
5548f
For more information www.linear.com/LTC5548
11
LTC5548
Test Circuit
IF
50Ω
•
T1
•
3
2
1
IF –
IF+
GND
4 GND
LTC5548
GND 12
C4
RF
50Ω
13
GND
5 RF
C1
ZO = 50Ω
L = 1.4mm
6 GND
LO 11
ZO = 50Ω
L = 3.55mm
C3
LO
50Ω
GND 10
EN
X2
VCC
7
8
9
VCC
(3.0V TO 3.6V)
EN
X2
C2
C5
5548 F01
REF DES
VALUE
SIZE
VENDOR
COMMENT
C1, C3
0.15pF
0402
AVX
ACCU-P 04021JR15ZBS
C2, C4
22pF
0402
AVX
0402A220JAT2A
C5
1µF
0603
Murata
GRM188R71A105KA61
T1
TC1-1-13M+*
Mini Circuits
IF = 4.5MHz to 3GHz
TCM1-83X+
Mini Circuits
IF = 10MHz to 6GHz
* Standard Evaluation Board Configuration
Figure 1. Standard Test Circuit Schematic
12
5548f
For more information www.linear.com/LTC5548
LTC5548
Applications Information
Introduction
The LTC5548 consists of a high linearity double-balanced
mixer core, LO buffer amplifier, LO frequency doubler and
bias/enable circuits. See the Block Diagram section for a
description of each pin function. The RF and LO are singleended terminals. The IF is differential. An external balun is
needed if a single-ended IF signal is desired. The LTC5548
can be used as a frequency downconverter where the RF
is used as an input and IF is used as an output. It can also
be used as a frequency upconverter where the IF is used
as an input and RF is used as an output. Low side or high
side LO injection can be used. The evaluation circuit and the
evaluation board layout are shown in Figure 1 and Figure 2,
respectively.
LTC5548
RF
50Ω
5
RF
C1 ZO = 50Ω
L = 1.4mm
5548 F03
Figure 3. Simplified RF Port Interface Schematic
0
IF = 240MHz
IF = 1890MHz
IF = 4000MHz
RF RETURN LOSS (dB)
5
10
15
20
25
30
35
40
2
3
4
5
6
7
8
9 10 11 12 13 14
RF FREQUENCY (GHz)
5548 F04a
(a)
0
IF = 240MHz
IF = 1890MHz
IF = 4000MHz
Figure 2. Evaluation Board Layout
RF Port
The mixer’s RF port, shown in Figure 3, is connected to the
primary winding of an integrated transformer. The primary
side of the RF transformer is DC-grounded internally and
the DC resistance of the primary side is approximately
3.2Ω. A DC blocking capacitor is needed if the RF source
has DC voltage present. The secondary winding of the
RF transformer is internally connected to the mixer core.
RF RETURN LOSS (dB)
5
10
15
20
25
30
35
2
3
4
5
6
7
8
9
10
11
RF FREQUENCY (GHz)
(b)
5548 F04b
Figure 4. RF Port Return Loss (a) C1 = 0.15pF (b) C1 Open
5548f
For more information www.linear.com/LTC5548
13
LTC5548
Applications Information
The RF port is broadband matched to 50Ω from 2GHz to
14GHz with a 0.15pF shunt capacitor (C1) located 1.4mm
away from the RF pin. The RF port is 50Ω matched from
2GHz to 10GHz without C1. An LO between –6dBm and
6dBm is required for good RF impedance matching. The
measured RF input return loss is shown in Figure 4 for
IF frequencies of 240MHz, 1890MHz and 4GHz with low
side LO.
The RF input impedance and input reflection coefficient
versus RF frequency is listed in Table 1. The reference plane
for this data is Pin 5 of the IC, with no external matching,
and the LO is driven at 7.5GHz.
Table 1. RF Input Impedance and S11 (at Pin 5, No External
Matching, LO Input Driven at 7.5GHz)
S11
FREQUENCY
(GHz)
INPUT
IMPEDANCE
MAG
ANGLE
2
34.3+j28.9
0.37
99.6
3
49.4+j24.7
0.24
77.4
4
57.2-j3.8
0.08
–25.8
5
37.7+j4.4
0.15
157.4
6
43.4+j2.2
0.07
160.2
7
46.2-j1.9
0.04
–152.3
8
47.8-j1.1
0.02
–155.0
Table 1. RF Input Impedance and S11 (at Pin 5, No External
Matching, LO Input Driven at 7.5GHz)
9
48.8+j0.6
0.01
152.8
10
46.1+j9.1
0.10
107.8
11
35.8+j3.2
0.17
165.2
12
16.3+j4.1
0.51
169.5
13
10.9+j2.3
0.64
174.5
14
12.9-j3.5
0.59
–171.4
LO Input
The mixer’s LO input, shown in Figure 5, consists of a
single-ended to differential conversion, high speed limiting differential amplifier and an LO frequency doubler.
The LO amplifier is optimized for the 1GHz to 12GHz LO
frequency range. LO frequencies above or below this frequency range may be used with degraded performance.
The LO frequency doubler is controlled by a digital voltage
input at X2 (Pin 8). When the X2 voltage is higher than
1.2V, the LO frequency doubler is enabled. When X2 is left
open or its voltage is lower than 0.3V, the LO frequency
doubler is disabled.
The DC voltage at the LO input is about 1.6V. A DC blocking capacitor (C4) is required.
LTC5548
Z0 = 50Ω
L = 3.55mm
X2
LO
C4
LO
11
C3
8
X2
9
VCC
5548 F05
Figure 5. Simplified LO Input Schematic
14
5548f
For more information www.linear.com/LTC5548
LTC5548
Applications Information
The LO is 50Ω matched from 1GHz to 12GHz, with a 0.15pF
shunt capacitor (C3) located 3.55mm away from the LO
pin. External matching components may be needed for
extended LO operating frequency range. The measured LO
input return loss is shown in Figure 6. The LO return loss
does not change when LO frequency double is enabled.
The nominal LO input level is 0dBm, although the limiting
amplifiers will deliver excellent performance over a ±6dBm
input power range.
0
X2 = LOW, EN = HIGH
X2 = LOW, EN = LOW
X2 = HIGH, EN = HIGH
LO RETURN LOSS (dB)
5
10
15
20
25
30
1
2
3
4
5
6
7
8
The LO input impedance and input reflection coefficient
versus frequency, is shown in Table 2.
Table 2. LO Input Impedance vs Frequency (at Pin 11, No
External Matching)
S11
FREQUENCY
(GHz)
INPUT
IMPEDANCE
MAG
ANGLE
1
63.8-j17.4
0.19
–42.9
2
58.1-j12.7
0.14
–50.8
3
50.5-j10.8
0.11
–81.2
4
43.4-j9.1
0.12
–120.4
5
36.7+j4.6
0.16
157.9
6
30.9-j6.8
0.25
–155.6
7
28.1-j6.3
0.29
–159.3
8
28.7-j5.1
0.28
–162.8
9
28.9-j2.2
0.27
–172.5
10
26.4+j2.6
0.31
171.8
11
24.1+j3.1
0.35
170.8
12
24.3+j0.3
0.35
179.1
9 10 11 12 13
LO FREQUENCY (GHz)
5548 F06a
(a) C3 = 0.15pF
0
X2 = LOW, EN = HIGH
X2 = LOW, EN = LOW
X2 = HIGH, EN = HIGH
LO RETURN LOSS (dB)
5
10
15
20
25
30
1
2
3
4
5
6
7
8
9 10 11 12 13
LO FREQUENCY (GHz)
5548 F06b
(b) C3 Open
Figure 6. LO Input Return Loss
5548f
For more information www.linear.com/LTC5548
15
LTC5548
Applications Information
IF Port
The measured IF port return loss is shown in Figure 8.
The mixer’s IF port is differential as shown in Figure 7. ESD
protection diodes are connected to both of these ports.
The differential IF output of the LTC5548 is suitable for
directly driving a wideband differential amplifier or filter.
Figure 9 shows a schematic for the evaluation of LTC5548
with a differential IF at very low IF frequency.
The impedance of the IF+ and IF– terminals is approximately 25Ω in parallel with 0.25pF. An external 1:1 balun
is required for a 50Ω single-ended IF. Using a TC1-1-13M+
balun, for example, the IF port is broadband matched from
4.5MHz to 3GHz, when the LO is applied.
IF –
3
2
5
IF RETURN LOSS (dB)
LTC5548
0
IF +
10
TCM1-83X+
15
TC1-1-13M+
20
25
30
35
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
IF FREQUENCY (GHz)
5548 F07
5548 F08
Figure 7. Simplified IF Port Schematic
Figure 8. IF Port Return Loss
L-PADS AND 180° COMBINER FOR
50Ω SINGLE-ENDED MEASUREMENT
34.8Ω
IF –
50Ω
10kHz TO 20MHz
COMBINER
0°
35.7Ω
+
34.8Ω
50Ω
3
LTC5548
Z0 = 50Ω
L = 1.4mm
IF
50Ω
35.7Ω
2
IF –
IF +
X2
LO
AMP
RF
0.15pF
IF
50Ω
OUT
180°
Z0 = 50Ω
L = 3.55mm
5
RF
ZMSCJ-2-2
22pF
11
LO
LO
0.15pF
MIXER
CORE
REF/BIAS
7
EN
8
X2
9
VCC
5548 F09
VCC
3.3V
EN
X2
22pF
1µF
Figure 9. Test Circuit for Wideband Differential Output at IF Frequency of 10kHz to 20MHz
16
For more information www.linear.com/LTC5548
5548f
LTC5548
Applications Information
The complete test circuit, shown in Figure 9, uses resistive
impedance matching attenuators (L-pads) on an evaluation
board to transform each 25Ω IF output to 50Ω. An external 0°/180° power combiner is then used to convert the
100Ω differential output to 50Ω single-ended to facilitate
measurement. The measured performance is shown in
Figure 10. The measured results do not include the loss
of the L-pads and external 180° combiner.
CONVERSION LOSS (dB), IIP3 (dBm)
Figure 11 shows a simplified schematic of the EN pin
interface. To enable the chip, the EN voltage must be
higher than 1.2V. The voltage at the EN pin should never
exceed VCC by more than 0.3V. If this should occur, the
supply current could be sourced through the ESD diode,
potentially damaging the IC. If the EN pin is left floating,
its voltage will be pulled low by the internal pull-down
resistor and the chip will be disabled.
X2 Interface
25
IIP3
23
15
13
RF = 5.8GHz
LS LO
11
9
CONVERSION LOSS
7
5
Enable Interface
0
4000
8000
12000
20000
16000
IF FREQUENCY (kHz)
5548 F10
Figure 10. Conversion Gain and IIP3 for Differential
IF Frequency of 10kHz to 20MHz
9
7
VCC
EN
Figure 12 shows a simplified schematic of the X2 pin
interface. To enable the integrated LO frequency doubler,
the X2 voltage must be higher than 1.2V. The X2 voltage
at the pin should never exceed VCC by more than 0.3V. If
this should occur, the supply current could be sourced
through the ESD diode, potentially damaging the IC. If the
X2 pin is left floating, its voltage will be pulled low by the
internal pull-down resistor and the LO frequency doubler
will be disabled.
Supply Voltage Ramping
Fast ramping of the supply voltage can cause a current
glitch in the internal ESD protection circuits. Depending on
the supply inductance, this could result in a supply voltage transient that exceeds the maximum rating. A supply
voltage ramp time of greater than 1ms is recommended.
LTC5548
9
BIAS
8
5548 F11
Figure 11. Simplified Enable Input Circuit
VCC
LTC5548
X2
5548 F12
Figure 12. Simplified X2 Interface Circuit
5548f
For more information www.linear.com/LTC5548
17
LTC5548
Applications Information
Spurious Output Levels
Mixer spurious output levels versus harmonics of the
RF and LO are tabulated in Table 3. The spur levels were
measured on a standard evaluation board using the test
circuit shown in Figure 1. The spur frequencies can be
calculated using the following equation:
Frequency Downconversion: fSPUR = (M • fRF)±(N • fLO)
Frequency Upconversion: fSPUR = (M • fIF)±(N • fLO)
Table 3a. Downconversion IF Output Spur Levels (dBc): LO Frequency Doubler Off (X2 = Low): fSPUR = (M • fRF) – (N • fLO)
RF = 5250MHz, PRF = –6dBm, PLO = 0dBm, LO = 4900MHz
N
0
1
0
M
2
3
4
5
–25
–5
–37
–45
*
1
–51
0
–42
–16
–59
–56
2
–72
–69
–81
–77
–71
–75
3
–75
–72
–78
–61
–79
–69
4
*
–75
–77
–79
–81
–78
5
*
*
–74
–78
–77
–81
*Out of the test equipment range.
Table 3b. Downconversion IF Output Spur Levels (dBc): LO Frequency Doubler On (X2 = High): fSPUR = (M • fRF) – (N • fLO)
RF = 5252MHz, PRF = –6dBm, PLO = 0dBm, LO = 2450MHz
N
0
0
M
1
2
3
4
5
6
7
8
–24
–14
–8
–5
–22
–32
–32
–51
1
–25
–18
0
–18
–29
–28
–18
–29
–43
2
–67
–77
–64
–61
–60
–61
–68
–70
–65
3
–75
–74
–72
–78
–72
–76
–63
–69
–78
4
*
–76
–74
–74
–74
–76
–67
–77
–68
5
*
*
*
–75
–75
–74
–69
–66
–70
*Out of the test equipment range.
18
5548f
For more information www.linear.com/LTC5548
LTC5548
Package Description
Please refer to http://www.linear.com/product/LTC5548#packaging for the most recent package drawings.
UDB Package
Variation A
12-LeadUDB
Plastic
QFN (3mm × 2mm)
Package
(Reference Variation:
LTC DWG # 05-08-1985
Rev Ø)
A
12-Lead Plastic QFN (3mm × 2mm)
(Reference LTC DWG # 05-08-1985 Rev Ø)
0.25 ±0.05
0.85 ±0.05
0.65 ±0.05
0.77 ±0.05
0.05 REF
2.50 ±0.05
DETAIL B
DETAIL B
0.25 ±0.10
PACKAGE
OUTLINE
0.25 ±0.05
0.50 BSC
0.75 ±0.05
0.77 ±0.10
0.05 REF
DETAIL A
3.50 ±0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.13
TYP
10
12
0.15 REF
0.60 ±0.10
0.40 ±0.10
9
1 0.40 REF
7
0.40 ±0.10
3
2.00 ±0.10
6
3.00 ±0.10
0.50 ±0.10
0.75 ±0.05
0.20 REF
DETAIL A
4
0.50 ±0.10
(UDB12) DFN 0814 REV 0
0.25 ±0.05
0.50 BSC
BOTTOM VIEW—EXPOSED PAD
SIDE VIEW
0.00 – 0.05
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
5548f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection
of its circuits
as described
herein will not infringe on existing patent rights.
For more
information
www.linear.com/LTC5548
19
LTC5548
Typical Application
Wideband 10MHz to 6GHz Upconversion to 6.5GHz
Conversion Loss and IIP3 vs Input
Frequency (High Side LO)
TCM1-83X+
LTC5548
•
•
10MHz TO 6GHz
IF +
RF
IF –
6.5GHz
LO
ZO = 50Ω
L = 3.55mm
22pF
0.15pF
CONVERSION LOSS (dB), IIP3 (dBm)
28
26
24
20
RFOUT = 6.5GHz
LO DOUBLER OFF
TC = 25°C
18
16
14
12
10
CONVERSION LOSS
8
6
6.51GHz to 12.5GHz
IIP3
22
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
5548 TA02a
INPUT FREQUENCY (GHz)
5548 TA02b
Related Parts
PART NUMBER DESCRIPTION
COMMENTS
Mixers, Modulators and Demodulators
LTC5549
2GHz to 14GHz Microwave Mixer
8dB Conversion Loss, 24dBm IIP3, 500MHz to 6GHz Single-Ended IF with Integrated
Balun
LTC5544
4GHz to 6GHz Downconverting Mixer
7.5dB Gain, >25dBm IIP3 and 10dB NF, 3.3V/200mA Supply
LTC5576
3GHz to 8GHz High Linearity Active
Upconverting Mixer
25dBm OIP3, –0.6dB Gain, 14.1dB NF, –154dBm/Hz Output Noise Floor, –28dBm LO
Leakage at 8GHz
LTC5551
300MHz to 3.5GHz Ultrahigh Dynamic Range
Downconverting Mixer
+36dBm IIP3; 2.4dB Gain, <10dB NF, 0dBm LO Drive, +18dBm P1dB,
670mW Power Consumption
LTC5567
400MHz to 4GHz, Active Downconverting Mixer 1.9dB Gain, 26.9dBm IIP3 and 11.8dB NF at 1950MHz, 3.3V/89mA Supply
LTC5577
300MHz to 6GHz High Signal Level Active
Downconverting Mixer
50Ω Matched Input from 1.3GHz to 4.3GHz, 30dBm IIP3, 0dB Gain,
>40dB LO-RF Isolation, 0dBm LO Drive
LTC5510
1MHz to 6GHz Wideband High Linearity Active
Mixer
50Ω Matched Input from 30MHz to 6GHz, 27dBm OIP3, 1.5dB Gain,
Up- or Down-Conversion
LTC5585
4GHz Wideband I/Q Demodulator
400MHz to 4GHz Direct Conversion, 25.7dBm IIP3; 60dBm, IIP2 Adjustable to >85dBm,
DC Offset Cancellation, >500MHz I & Q Bandwidth
LTC5588-1
6GHz I/Q Modulator
200MHz to 6GHz Direct Conversion, 31dBm OIP3 Adjustable to 34dBm, –160dBm/Hz
Output Noise Floor, Excellent ACPR
Amplifiers
LTC6430-20
High Linearity Differential IF Amp
20MHz to 2GHz Bandwidth, 20.8dB Gain, 51dBm OIP3, 2.9dB NF at 240MHz
LTC6431-20
High Linearity Single-Ended IF Amp
20MHz to 1.4GHz Bandwidth, 20.8dB Gain, 46.2dBm OIP3, 2.6dB NF at 240MHz
RF Power Detectors
LTC5564
15GHz Ultra Fast 7ns Response Time RF
Detector with Comparator
600MHz to 15GHz, –24dB to 16dBm Input Power Range, 9ns Comparator Response
Time, 125°C Version
LT5581
6GHz Low Power RMS Detector
40dB Dynamic Range, ±1dB Accuracy Over Temperature, 1.5mA Supply Current
LTC5582
40MHz to 10GHz RMS Detector
±0.5dB Accuracy Over Temperature, ±0.2dB Linearity Error, 57dB Dynamic Range
LTC5583
Dual 6GHz RMS Power Detector
Up to 60dB Dynamic Range, ±0.5dB Accuracy Over Temperature, >50dB Isolation
RF PLL/Synthesizer with VCO
LTC6948
Ultralow Noise, Low Spurious Frac-N PLL with
Integrated VCO
20 Linear Technology Corporation
373MHz to 6.39GHz, –157dBc/Hz WB Phase Noise Floor, –274dBc/Hz Normalized
In-Band 1/f Noise
1630 McCarthy Blvd., Milpitas, CA 95035-7417
For more information www.linear.com/LTC5548
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com/LTC5548
5548f
LT 0216 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2016