DC1984A - Demo Manual

DEMO MANUAL DC1984A
LTC5510
1MHz to 6GHz Wideband
High Linearity Active Mixer
Description
Demonstration circuit 1984A showcases the LTC®5510.
wideband high linearity active mixer for VHF/UHF upmixer
applications, where a 70MHz input signal is upconverted
to the 100MHz to 1GHz output range. Its input port is
optimized for 30MHz to 2.6GHz, and its output port is
optimized for 10MHz to 1.3GHz. The LO input can be
either high side or low side.
Another demonstration circuit, the DC1983A, utilizing a
multilayer chip hybrid balun, is designed for evaluating
the LTC5510 for wideband up/downmixer applications
with 30MHz to 3GHz input and 1.2GHz to 2.1GHz output.
DEMO BOARD
INPUT RANGE
LO RANGE
OUTPUT RANGE
DC1983A
30MHz to 3GHz
5MHz to 6GHz
1.2GHz to 2.1GHz
DC1984A
30MHz to 2.6GHz
5MHz to 6GHz
10MHz to 1.3GHz
The LTC5510 is a high linearity active mixer optimized
for applications requiring very wide input bandwidth,
low distortion and low LO leakage. The IC includes a
double-balanced active mixer with an input buffer and a
high speed LO amplifier. The mixer can be used for both
up- and down-conversion and requires only 0dBm of LO
power to achieve excellent distortion and noise performance. The LTC5510 is optimized for 5V, but can also
be used with a 3.3V supply with reduced performance.
The shutdown function allows the part to be disabled for
further power saving.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1984A
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.
Performance Summary
Specifications are at TC = 25°C, VCC = 5V, EN = High, PLO = 0dBm,
PIN = –10dBm (–10dBm/tone for two-tone tests), unless otherwise noted. (Note 1)
PARAMETER
CONDITIONS
VALUE
UNITS
Input Frequency Range
30 to 2600
MHz
Output Frequency Range
10 to 1300
MHz
LO Input Frequency Range
5 to 6000
MHz
–6 to 6
dBm
LO Input Power Range
Supply Voltage Range
5V Supply, R1 = Open (Default Configuration)
3.3V Supply, R1 = 2kΩ
4.5 to 5.3
3.1 to 3.5
Supply Current
5V Supply, R1 = Open (Default Configuration)
3.3V Supply, R1 = 2kΩ
98
90
mA
mA
Total Supply Current During Shutdown
EN = Low
1.3
mA
>1.8
V
EN Input High Voltage (On)
EN Input Low Voltage (Off)
V
V
<0.5
V
–20 to 200
µA
EN: Low to High
0.6
µs
EN: High to Low
0.6
µs
Temperature Monitor Pin (TEMP)
DC Voltage at TJ = 25°C
IIN = 10µA
IIN = 80µA
697
755
mV
mV
Temperature Monitor Pin (TEMP)
Voltage Temperature Coefficient
IIN = 10µA
IIN = 80µA
–1.80
–1.61
EN Input Current
–0.3V to VCC + 0.3V
Turn-On Time
Turn-Off Time
mV/°C
mV/°C
dc1984af
1
DEMO MANUAL DC1984A
Performance Summary
Specifications are at TC = 25°C, VCC = 5V, EN = High, PLO = 0dBm,
PIN = –10dBm (–10dBm/tone for two-tone tests), unless otherwise noted. (Note 1)
PARAMETER
CONDITIONS
VALUE
UNITS
5V VHF/UHF Upmixer Application: fIN = 70MHz, fOUT = 100MHz to 1000MHz, fLO = fIN + fOUT
Conversion Gain
fOUT = 456MHz
1.1
dB
Two-Tone Output 3rd Order Intercept (Δf = 2MHz)
fOUT = 456MHz
29.0
dBm
SSB Noise Figure
fOUT = 456MHz
11.3
dB
SSB Noise Floor at PIN = 5dBm
fIN = 44MHz, fLO = 532MHz, fOUT = 462MHz
–152
dBm/Hz
LO-IN Leakage
fLO = 100MHz to 1500MHz
< –62
dBm
LO-OUT Leakage
fLO = 100MHz to 1500MHz
< –39
dBm
IN-OUT Isolation
fIN = 50MHz to 400MHz
> 43
dB
IN-LO Isolation
fIN = 50MHz to 400MHz
> 70
dB
Input 1dB Compression
fOUT = 456MHz
11.0
dBm
Note 1: Subject to change without notice. Refer to the latest LTC5510 data sheet for the most up-to-date specifications.
Absolute Maximum Ratings
NOTE. Stresses beyond 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.
Supply Voltage (VCC)................................................6.0V
Enable Voltage (EN)......................... –0.3V to VCC + 0.3V
LO Input Power (1MHz to 6GHz)......................... +10dBm
IN Input Power (1MHz to 6GHz).......................... +18dBm
Temp Monitor Input Current (TEMP).......................10mA
Operating Temperature Range (TC)......... –40°C to 105°C
Detailed Description
Supply Voltage Ramping
Supply Voltage
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.
The LTC5510 automatically detects the supply voltage and
configures internal components for 5V or 3.3V operation.
The auto-detect circuit switches at approximately 4.1V.
To avoid undesired operation, the mixer should only be
operated in the 4.5V to 5.3V or 3.1V to 3.6V supply range.
Do not clip powered test leads directly onto the demonstration circuit’s VCC and EN turrets. Instead, make all
necessary connections with power supplies turned off,
then increase to operating voltage.
For best overall temperature performance, the external
bias adjustment resistor, R1, should be left open for 5V
supply and set to 2kΩ for 3.3V supply. By default, demonstration circuit 1984A is configured for 5V supply, and
R1 is not installed.
2
dc1984af
DEMO MANUAL DC1984A
Detailed Description
Enable Function
LO Port
The LTC5510 features Enable/Shutdown control. When
the applied Enable (EN) voltage is logic high (>1.8V), the
mixer is enabled. When the Enable (EN) voltage is logic
low (<0.5V), the mixer is shutdown reducing current
consumption to approximately 1.3mA. The Enable voltage
should never fall below –0.3V, or exceed the power supply
voltage by more than 0.3V.
Demonstration Circuit 1984A’s LO input port is broadband
matched to 50Ω from 5MHz to 6GHz, with better than 10dB
return loss. The impedance match is maintained whether
the part is enabled or disabled.
The LTC5510’s junction temperature can be estimated by
forcing a current into the on-chip diode and measuring
the resulting voltage:
–6
RETURN LOSS (dB)
Temperature Monitor (TEMP)
0
ON (EN = HI)
–18
–24
10μA forced current:
TJ =
–12
OFF (EN = LOW)
VD − 742.4
–1.796
–30
0
80μA forced current:
TJ =
5000
dc1984a F02
OUT Port
Where TJ is the junction temperature in °C, and VD is the
TEMP pin voltage in mV.
IN Port
Demonstration Circuit 1984A utilizes a wideband transmission line type transformer at the output port. The output
port is well matched to 50Ω from 10MHz to 1.3GHz.
0
Demonstration Circuit 1984A’s IN port is broadband
matched to 50Ω from 30MHz to 2.6GHz.
–6
RETURN LOSS (dB)
0
–6
RETURN LOSS (dB)
2000
3000
4000
FREQUENCY (MHz)
Figure 2. LO Port Return Loss
VD − 795.6
–1.609
–12
–12
–18
–24
–18
–30
–24
–30
1000
0
300
600
900
1200
FREQUENCY (MHz)
1500
dc1984a F03
Figure 3. OUT Port Return Loss
0
1000
2000
3000
FREQUENCY (MHz)
4000
dc1984a F01
Figure 1. IN Port Return Loss
dc1984af
3
DEMO MANUAL DC1984A
Measurement Equipment and Setup
The LTC5510 is a wideband active mixer IC with very high
linearity. Accuracy of its performance measurement is
highly dependent on equipment setup and measurement
technique. The recommended measurement setups are
presented in Figure 4, Figure 5 and Figure 6. The following
precautions should be observed:
3. Use high performance amplifiers with high IP3 and
high reverse isolation, such as the Mini-Circuits ZHL1042J, on the outputs of the RF signal generators to
improve source isolation to prevent the sources from
modulating each other and generating intermodulation
products.
1. Use high performance signal generators with low harmonic output and low phase noise, such as the Rohde
& Schwarz SME06. Filters at the signal generators’
outputs may also be used to suppress higher order
harmonics.
4. Use attenuator pads with good VSWR on the demonstration circuit’s input and output ports to improve
source and load match to reduce reflections, which
may degrade measurement accuracy.
2. A high quality RF power combiner which provides
broadband 50Ω termination on all ports and has good
port-to-port isolation should be used, such as the MiniCircuits ZFSC-2-372-S+.
5. A high dynamic range spectrum analyzer, such as
the Rohde & Schwarz FSEM30, should be used for
linearity measurement.
50Ω
TERMINATION
NETWORK
ANALYZER
50Ω
TERMINATION
+
–
5V DC
POWER
SUPPLY
Figure 4. Proper Equipment Setup for Return Loss Measurements
4
dc1984af
DEMO MANUAL DC1984A
Measurement Equipment and Setup
6. Use narrow resolution bandwidth (RBW) and engage
video averaging on the spectrum analyzer to lower
the displayed average noise level (DANL) in order to
improve sensitivity and to increase dynamic range.
However, the trade-off is increased sweep time.
7. Spectrum analyzers can produce significant internal
distortion products if they are overdriven. Generally,
spectrum analyzers are designed to operate at their best
with about –30dBm at their input filter or preselector.
Sufficient spectrum analyzer input attenuation should be
used to avoid saturating the instrument, but too much
attenuation reduces sensitivity and dynamic range.
SIGNAL
GENERATOR
1
8. Before taking measurements, the system performance
should be evaluated to ensure that:
a. Clean input signals can be produced. The two-tone
signals’ OIP3 should be at least 15dB better than the
DUT’s IIP3.
b.The spectrum analyzer’s internal distortion is minimized.
c. The spectrum analyzer has enough dynamic range
and sensitivity. The measurement system’s IIP3
should be at least 15dB better than the DUT’s OIP3.
d.The system is accurately calibrated for power and
frequency.
6dB
SIGNAL
GENERATOR
2
SPECTRUM
ANALYZER
MINI-CIRCUITS 3dB
ZHL-1042J
SIGNAL
GENERATOR
3
3dB
MINI-CIRCUITS 3dB
ZHL-1042J
MINI-CIRCUITS
ZFSC-2-372-S+
+ 5V DC
POWER
– SUPPLY
Figure 5. Proper Equipment Setup for RF Performance Measurements
dc1984af
5
DEMO MANUAL DC1984A
Measurement Equipment and Setup
SIGNAL
GENERATOR
BPF
6dB
NOISE
FIGURE
METER
NOISE
SOURCE
3dB
BPF
BPF
3dB
+ 5V DC
POWER
– SUPPLY
Figure 6. Proper Equipment Setup for Noise Figure Measurement
Quick Start Procedure
Demonstration circuit 1984A is easy to set up to evaluate
the performance of the LTC5510. Refer to Figure 4, Figure
5 and Figure 6 for proper equipment connections.
NOTE. Care should be taken to never exceed absolute
maximum input ratings. Make all connections with RF
and DC power off.
Return Loss Measurements
1. Configure the Network Analyzer for return loss measurement, set appropriate frequency range, and set the
test signal to 0dBm.
3. Connect all test equipment as shown in Figure 4 with
the DC power supply turned off.
4. Increase the DC power supply voltage to 5V, and verify
that the total current consumption is close to the figure
listed in the Performance Summary. The supply voltage
should be confirmed at the demo board VCC and GND
terminals to account for test lead ohmic losses.
5. Terminate unused demo board ports in 50Ω. Measure
return losses of the IN, LO and OUT ports.
2. Calibrate the Network Analyzer.
6
dc1984af
DEMO MANUAL DC1984A
Quick Start Procedure
RF Performance Measurements
1. Connect all test equipment as shown in Figure 5, with the
signal generators and the DC power supply turned off.
2. Increase the DC power supply voltage to 5V, and verify
that the total current consumption is close to the figure
listed in the Performance Summary. The supply voltage
should be confirmed at the demo board VCC and GND
terminals to account for test lead ohmic losses.
3. Set the LO source (signal generator 1) to provide a
0dBm CW signal at appropriate LO frequency to the
demo board LO input port.
4. Set the RF sources (signal generators 2 and 3) to
provide two –10dBm CW signals, 2MHz apart, at the
appropriate frequencies to the demo board IN port.
5. Measure the resulting output on the Spectrum Analyzer:
6. Calculate output 3rd order intercept:
OIP3 =
∆IM3
+ POUT
2
Where ΔIM3 = POUT – PIM3. POUT is the lowest fundamental
output signal power. PIM3 is the highest 3rd order intermodulation product power.
7. Turn off one of the RF signal generators, and measure
conversion gain, IN-OUT isolation, LO-OUT leakage,
and input 1dB compression point.
Noise Figure Measurement
1. Configure and calibrate the noise figure meter for mixer
measurements.
2. Connect all test equipment as shown in Figure 6, with
the signal generator and the DC power supply turned
off.
3. Increase the DC power supply voltage to 5V, and verify
that the total current consumption is close to the figure
listed in the Performance Summary. The supply voltage
should be confirmed at the demo board VCC and GND
terminals to account for test lead ohmic losses.
4. Measure the single-sideband noise figure.
PCB Layout
Layer 1, Top Layer
Layer 2, Ground Layer
dc1984af
7
DEMO MANUAL DC1984A
PCB Layout
Layer 3, Power Layer
Layer 4, Bottom Layer
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
4
C1, C2, C4, C5
CAP, 0402, X7R, 16V, 0.1µF, 10%
MURATA, GRM155R71C104KA88D
2
1
C3
CAP, 0402, C0G, 50V, 0.5pF, ±0.1pF
MURATA, GJM1555C1HR50BB01D
3
1
C6
CAP, 0603, X7R, 16V, 1µF, 10%
MURATA, GRM188R71C105KA12D
4
4
C7, C8, C9, C10
CAP, 0402, X7R, 16V, 10nF, 10%
MURATA, GRM155R71C103KA01D
5
4
E1, E2, E3, E4
TESTPOINT, TURRET, 0.094"
MILL-MAX, 2501-2-00-80-00-00-07-0
6
3
J1, J2, J3
CONN, SMA, 50Ω, EDGE-LAUNCH
E.F. JOHNSON, 142-0701-851
7
0
J4
CONN, OPTION
8
0
L1, L2
IND, 0603, OPTION
9
1
L3
IND, 0603, WIRE-WOUND, 220nH, 2%
COILCRAFT, 0603HP-R22XGLU
10
2
L4, L5
IND, 0402, WIRE-WOUND, 15nH, 2%
COILCRAFT, 0402HP-15NXGLU
11
0
R1
RES, 0402, OPTION
12
1
T1
XFMR, 1:1, 4.5-3000MHz
MINI-CIRCUITS, TC1-1-13M+
13
1
T2
XFMR, 4:1, 10-1900MHz
MINI-CIRCUITS, TC4-19LN+
14
1
U1
IC, LTC5510IUF#PBF, QFN 4mm × 4mm
LINEAR TECHNOLOGY, LTC5510IUF#PBF
15
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1984A
8
dc1984af
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.
A
B
C
E4
3.1V - 3.6V
2.0K
OPEN
R1
6
4
5
1. ALL COMPONENTS ARE 0402 SIZE
NOTE: UNLESS OTHERWISE SPECIFIED
4.5V - 5.3V
E3
T1
1:1 XFMR
MINI-CIRCUITS
TC1-1-13M+
EN
RANGE
3
2
1
3.3V
VCC
VCC RANGE
J1
5V (DEFAULT)
*
IN
TEMP
J2
4
C2
0.1uF
C3
0.5pF
C1
0.1uF
LGND
IN-
IN+
TEMP
L3
220nH
0603
4
3
2
1
0.1uF
C4
15
U1
LTC5510IUF
9
17
10
11
12
3
C8
10nF
SCALE = NONE
A.K.
SUNNY H.
PCB DES.
APPROVALS
2
1
2
3
__
ECO
DATE:
2
E2
E1
6
4
J4
J3
OUTOPT
OUT+
DATE
7-09-13
LTC5510IUF
1
DEMO CIRCUIT 1984A
Tuesday, July 09, 2013
IC NO.
SHEET 1
2
OF 1
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
GND
*
VCC
4.5V - 5.3V
C10
10nF
C9
10nF
SUNNY H.
APPROVED
WIDEBAND ACTIVE MIXER, LOW FREQUENCY OUTPUT
N/A
SIZE
DESCRIPTION
PRODUCTION
1
REVISION HISTORY
TECHNOLOGY
T2
4:1 XFMR
MINI-CIRCUITS
TC4-19LN+
2
REV
TITLE: SCHEMATIC
C6
1uF
0603
L5
15nH
L4
15nH
APP ENG.
L2
OPT
0603
L1
OPT
0603
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
3
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C7
10nF
*
R1
OPT
GND
GND
OUT-
OUT+
GND
0.1uF
C5
13
LO
4
16
TP
5
LO+
VCC1
6
EN
14
LOVCC2
7
GND
IADJ
8
D
5
A
B
C
D
DEMO MANUAL DC1984A
Schematic Diagram
dc1984af
9
DEMO MANUAL DC1984A
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
10 Linear Technology Corporation
dc1984af
LT 0713 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
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