5.9 GHz to 8.5 GHz, Low Noise Amplifier
Data Sheet
ADL5721
Rev. 0 Document Feedback
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Tel: 781.329.4700 ©2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Frequency range: 5.9 GHz to 8.5 GHz
Typical gain of 25 dB
Low noise input
Noise figure: <1.7 dB typical from 5.9 GHz to 8.5 GHz
High linearity input
>4.0 dBm typical input third-order intercept (IIP3)
>−10.6 dBm typical input 1 dB compression point (P1dB)
Matched 50 Ω single-ended input
Matched 100 Ω differential outputs
8-lead, 2.00 mm × 2.00 mm LFCSP microwave packaging
APPLICATIONS
Point to point microwave radios
Instrumentation
Satellite communications (SATCOM)
Phased arrays
FUNCTIONAL BLOCK DIAGRAM
50Ω
SINGLE-ENDED 100Ω
DIFFERENTIAL
GND
INPT
RBIAS
VCC1
OUTN
OUTP
BAND
VCC2
ADL5721
14258-001
Figure 1.
GENERAL DESCRIPTION
The ADL5721 is a narrow-band, high performance, low noise
amplifier targeting microwave radio link receiver designs. The
monolithic silicon germanium (SiGe) design is optimized for
microwave radio link bands ranging from 5.9 GHz to 8.5 GHz.
The unique design offers a single-ended 50 Ω input impedance
and provides a 100 Ω balanced differential output that is ideal
for driving Analog Devices, Inc., differential downconverters
and radio frequency (RF) sampling analog-to-digital converters
(ADCs). This low noise amplifier (LNA) provides noise figure
performance that, in the past, required more expensive three-
five (III-V) compounds process technology to achieve. This
LNA uses a band switch feature to allow the input P1dB and
noise figure to trade off for optimum system performance.
The ADL5721 and ADL5723 to ADL5726 family of narrow-
band LNAs are each packaged in a tiny, thermally enhanced,
2.00 mm × 2.00 mm LFCSP package. The ADL5721 and
ADL5723 to ADL5726 family operates over the temperature
range of −40°C to +85°C.
ADL5721 Data Sheet
Rev. 0 | Page 2 of 15
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
AC Specifications .......................................................................... 3
DC Specifications ......................................................................... 3
Absolute Maximum Ratings ............................................................ 4
Thermal Resistance ...................................................................... 4
ESD Caution .................................................................................. 4
Pin Configuration and Function Descriptions ............................. 5
Typical Performance Characteristics ............................................. 6
Low Band (BAND = 0 V) .............................................................6
High Band (BAND = 1.8 V) ........................................................8
Theory of Operation ...................................................................... 10
Applications Information .............................................................. 11
Layout .......................................................................................... 11
Differential vs. Single-Ended Output ...................................... 11
Evaluation Board ............................................................................ 13
Initial Setup ................................................................................. 13
Results .......................................................................................... 13
Basic Connections for Operation ............................................. 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 15
REVISION HISTORY
4/16—Revision 0: Initial Version
Data Sheet ADL5721
Rev. 0 | Page 3 of 15
SPECIFICATIONS
AC SPECIFICATIONS
TA = 25°C, VCC1 = 1.8 V, VCC2 = 3.3 V, ZSOURCE = 50 Ω, ZLOAD = 100 Ω differential, unless otherwise noted.
Table 1.
Parameter Test Conditions/Comments Min Typ Max Unit
FREQUENCY RANGE
Low Band, BAND = 0 V 5.9 7.2 GHz
High Band, BAND = 1.8 V 7.1 8.5 GHz
FREQUENCY = 5.9 GHz Low band, BAND = 0 V
Gain (S21) 25.0 dB
Noise Figure 1.7 dB
Input Third-Order Intercept (IIP3) Δf = 1 MHz, input power (PIN) = −30 dBm per tone 4.3 dBm
Input 1 dB Compression Point (P1dB) −10.6 dBm
Input Return Loss (S11) 10 dB
Output Return Loss (S22) 9 dB
FREQUENCY = 7.2 GHz Low band, BAND = 0 V
Gain (S21) 25.9 dB
Noise Figure 1.6 dB
Input Third-Order Intercept (IIP3)
Δf = 1 MHz, P
IN
= −30 dBm per tone
dBm
Input 1 dB Compression Point (P1dB) −9.3 dBm
Input Return Loss (S11) 10 dB
Output Return Loss (S22) 10 dB
FREQUENCY = 8.5 GHz High band, BAND = 1.8 V
Gain (S21) 24.6 dB
Noise Figure 1.5 dB
Input Third-Order Intercept (IIP3) Δf = 1 MHz, PIN = −30 dBm per tone 5.7 dBm
Input 1 dB Compression Point (P1dB) −8.6 dBm
Input Return Loss (S11)
dB
Output Return Loss (S22) 10 dB
DC SPECIFICATIONS
Table 2.
Parameter Test Conditions/Comments Min Typ Max Unit
POWER INTERFACE
VCC1 Voltage 1.65 1.8 1.95 V
VCC2 Voltage 3.1 3.3 3.5 V
Quiescent Current vs. Temperature
VCC1 TA = 25°C 11.6 mA
−40°C ≤ TA ≤ +85°C 12.1 mA
VCC2 TA = 25°C 74.1 mA
−40°C ≤ TA ≤ +85°C 74.4 mA
ADL5721 Data Sheet
Rev. 0 | Page 4 of 15
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter Rating
Supply Voltages
VCC1
2.25 V
VCC2 4.1 V
Maximum Junction Temperature 150°C
Operating Temperature Range −40°C to +85°C
Storage Temperature Range −55°C to +125°C
Lead Temperature Range (Soldering 60 sec) −65°C to +150°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
THERMAL RESISTANCE
θJA is thermal resistance, junction to ambient (°C/W), θJB is
thermal resistance, junction to board (°C/W), and θJC is thermal
resistance, junction to case (°C/W).
Table 4. Thermal Resistance
Package Type
θ
JA1
θ
JB1
θ
JC1
Unit
8-Lead LFCSP 39.90 23.88 3.71 °C/W
1 See JEDEC standard JESD51-2 for additional information on optimizing the
thermal impedance for a printed circuit board (PCB) with 3 × 4 vias.
ESD CAUTION
Data Sheet ADL5721
Rev. 0 | Page 5 of 15
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
GND
INPT
RBIAS
VCC1
OUTN
NOTES
1. THE EXPOSED PAD MUS T BE
SOLDERED TO A LOW IM P E DANCE
GRO UND P LANE.
2. THE DEV ICE NUMBE R ON THE FIGURE
DOES NOT INDICATE T HE LABEL ON
THE PACKAGE. RE FER TO THE PIN 1
INDI CATOR FOR THE PIN LOCATIONS.
OUTP
BAND
VCC2
3
4
1
2
6
5
8
7
ADL5721
TOP VIEW
(Not to Scal e)
14258-002
Figure 2. Pin Configuration
Table 5. Pin Function Descriptions
Pin No. Mnemonic Description
1 VCC1 1.8 V Power Supply. It is recommended to place the decoupling capacitors as close to this pin as possible.
2 GND Ground.
3 INPT RF Input. This pin is a 50 Ω single-ended input.
4 RBIAS Resistor Bias. For typical operation, connect a 442 Ω resistor from RBIAS to GND. It is recommended to
place the RBIAS resistor as close to the pin as possible.
5 BAND Band Select Control. Select a logic low of 0 V for the lower frequency range from 5.9 GHz to 7.2 GHz.
Select a logic high of 1.8 V for the higher frequency range from 7.1 GHz to 8.5 GHz.
6, 7 OUTP, OUTN RF Outputs. These pins are 100 Ω differential outputs.
8 VCC2 3.3 V Power Supply. It is recommended to place the decoupling capacitors as close to this pin as possible.
EPAD (EP) Exposed Pad. The exposed pad must be soldered to a low impedance ground plane.
ADL5721 Data Sheet
Rev. 0 | Page 6 of 15
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VCC1 = 1.8 V, VCC2 = 3.3 V, ZSOURCE = 50 Ω, ZLOAD = 100 Ω differential, unless otherwise noted.
LOW BAND (BAND = 0 V)
0
5
10
15
20
25
30
35
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
GAIN (d B)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-003
Figure 3. Gain vs. Frequency for Various Temperatures
0
5
10
15
20
25
30
35
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
GAIN (d B)
FREQUENCY (GHz)
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
14258-004
Figure 4. Gain vs. Frequency for Various Supply Voltages
0
1
2
3
4
5
6
7
8
9
10
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
NOISE FIGURE (dB)
FREQUENCY (GHz)
TA = –40° C
TA = +25°C
TA = +85°C
14258-005
Figure 5. Nosie Figure vs. Frequency for Various Temperatures
0
1
2
3
4
5
6
7
8
9
10
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
NOISE FIGURE (dB)
FREQUENCY (GHz)
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
14258-006
Figure 6. Noise Figure vs. Frequency for Various Supply Voltages
–30
–25
–20
–15
–10
–5
0
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
INP UT P1d B ( dBm)
FREQUENCY (GHz)
TA = –40° C
TA = +25°C
TA = +85°C
14258-007
Figure 7. Input P1dB vs. Frequency for Various Temperatures
–30
–25
–20
–15
–10
–5
0
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
INPUT P1dB (d Bm)
FREQUENCY (GHz)
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
14258-008
Figure 8. Input P1dB vs. Frequency for Various Supply Voltages
Data Sheet ADL5721
Rev. 0 | Page 7 of 15
–30
–25
–20
–15
–10
–5
0
5
10
15
20
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
INP UT IP 3 ( dBm)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-009
Figure 9. Input IP3 vs. Frequency for Various Temperatures
–30
–25
–20
–15
–10
–5
0
5
10
15
20
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
FREQUENCY (GHz)
INP UT IP 3 ( dBm)
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
14258-010
Figure 10. Input IP3 vs. Frequency for Various Supply Voltages
–40
–35
–30
–25
–20
–15
–10
–5
0
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
INPUT RETURN LOSS ( dB)
FREQUENCY (GHz)
TA = –40° C
TA = +25°C
TA = +85°C
14258-011
Figure 11. Input Return Loss vs. Frequency for Various Temperatures
–40
–35
–30
–25
–20
–15
–10
–5
0
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
OUTPUT RE TURN LOSS ( dB)
FREQUENCY (GHz)
TA = –40° C
TA = +25°C
TA = +85°C
14258-012
Figure 12. Output Return Loss vs. Frequency for Various Temperatures
ADL5721 Data Sheet
Rev. 0 | Page 8 of 15
HIGH BAND (BAND = 1.8 V)
0
5
10
15
20
25
30
35
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
GAI N ( dB)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-013
Figure 13. Gain vs. Frequency for Various Temperatures
0
5
10
15
20
25
30
35
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
GAIN (d B)
FREQUENCY (GHz)
14258-014
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
Figure 14. Gain vs. Frequency for Various Supply Voltages
0
1
2
3
4
5
6
7
8
9
10
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
NOISE FIGURE (dB)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-015
Figure 15. Nosie Figure vs. Frequency for Various Temperatures
0
2
4
6
8
10
9
7
5
3
1
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
NOISE FIGURE (dB)
FREQUENCY (GHz)
14258-016
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
Figure 16. Noise Figure vs. Frequency for Various Supply Voltages
–30
–25
–20
–15
–10
–5
0
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INPUT P1dB (d Bm)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-017
Figure 17. Input P1dB vs. Frequency for Various Temperatures
–30
–25
–20
–15
–10
–5
0
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INPUT P1dB (d Bm)
FREQUENCY (GHz)
14258-018
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
Figure 18. Input P1dB vs. Frequency for Various Supply Voltages
Data Sheet ADL5721
Rev. 0 | Page 9 of 15
–30
–25
–20
–15
–10
–5
0
5
10
15
20
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INP UT IP 3 ( dBm)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-019
Figure 19. Input IP3 vs. Frequency for Various Temperatures
–30
–25
–20
–15
–10
–5
0
5
10
15
20
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INPUT I P 3 ( dBm)
FREQUENCY (GHz)
14258-020
3.1V/1.65V
3.3V/1.8V
3.5V/1.95V
Figure 20. Input IP3 vs. Frequency for Various Supply Voltages
–30
–25
–20
–15
–10
–5
0
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INP UT RET URN LOS S ( dB)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-021
Figure 21. Input Return Loss vs. Frequency for Various Temperatures
–30
–25
–20
–15
–10
–5
0
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
OUT P UT RETURN LOSS ( dB)
FREQUENCY (GHz)
T
A
= –40° C
T
A
= +25°C
T
A
= +85°C
14258-022
Figure 22. Output Return Loss vs. Frequency for Various Temperatures
ADL5721 Data Sheet
Rev. 0 | Page 10 of 15
THEORY OF OPERATION
The ADL5721 is a narrow-band, high performance, low noise
amplifier targeting microwave radio link receiver designs. The
monolithic SiGe design is optimized for microwave radio link
bands ranging from 5.9 GHz to 8.5 GHz.
The unique design of the ADL5721 offers a single-ended 50 Ω
input impedance and provides a 100 Ω balanced differential
output. This LNA is ideal for driving Analog Devices differential
downconverters and RF sampling ADCs.
The ADL5721 provides cost-effective noise figure performance
without requiring more expensive III-V compounds process
technology.
This LNA uses a band switch feature to allow the input P1dB
and noise figure to trade off for optimum system performance.
The BAND pin allows the user to select between two frequency
ranges. A logic low of 0 V on the BAND pin selects the lower
frequency range from 5.9 GHz to 7.2 GHz, whereas a logic high
of 1.8 V selects the higher frequency range from 7.1 GHz to
8.5 GHz.
The ADL5721 is available in an 8-lead, 2.00 mm × 2.00 mm
LFCSP package, and operates over the temperature range of
−40°C to +85°C.
Data Sheet ADL5721
Rev. 0 | Page 11 of 15
APPLICATIONS INFORMATION
LAYOUT
Solder the exposed pad on the underside of the ADL5721 to a
low thermal and electrical impedance ground plane. This pad is
typically soldered to an exposed opening in the solder mask on
the evaluation board. Connect these ground vias to all other
ground layers on the evaluation board to maximize heat
dissipation from the device package.
14258-023
Figure 23. Evaluation Board Layout for the ADL5721 Package
DIFFERENTIAL vs. SINGLE-ENDED OUTPUT
This section provides the test results that compare the ADL5721
using a differential vs. a single-ended output. When using the
device as a single-ended output, use the RFOP output of the
evaluation board and terminate RFON to 50 Ω. Note that the
converse can be done as well; however, doing so produces slightly
different results from the plots shown in this section, caused by
some amplitude imbalance between the two differential ports,
RFOP and RFON. The output trace and connector loss were not
deembedded for these measurements.
Note that this performance is typical and not guaranteed.
35
30
25
20
15
10
5
0
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
GAI N ( dB)
FREQUENCY (GHz)
14258-024
Figure 24. Gain vs. Frequency, BAND = 0 V
0
35
30
25
20
15
10
5
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
GAI N ( dB)
FREQUENCY (GHz)
14258-027
Figure 25. Gain vs. Frequency, BAND = 1.8 V
0
1
2
3
4
5
6
7
8
9
10
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
NOISE FIGURE (dB)
FREQUENCY (GHz)
14258-025
Figure 26. Noise Figure vs. Frequency, BAND = 0 V
0
1
2
3
4
5
6
7
8
9
10
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
NOSIE FIGURE (dB)
FREQUENCY (GHz)
14258-028
Figure 27. Noise Figure vs. Frequency, BAND = 1.8 V
ADL5721 Data Sheet
Rev. 0 | Page 12 of 15
–10
–5
0
–20
–15
–30
–25
5
10
15
20
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
INPUT I P 3 ( dBm)
FREQUENCY (GHz)
14258-030
Figure 28. Input IP3 vs. Frequency, BAND = 0 V
–10
–5
–20
–15
–30
–25
0
5
10
15
20
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INPUT I P 3 ( dBm)
FREQUENCY (GHz)
14258-031
Figure 29. Input IP3 vs. Frequency, BAND = 1.8 V
–20
–15
–10
–30
–25
–5
0
5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2
INPUT P1dB (d Bm)
FREQUENCY (GHz)
14258-032
Figure 30. Input P1dB vs. Frequency, BAND = 0 V
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5
INPUT P1dB (d Bm)
FREQUENCY (GHz)
14258-033
–20
–15
–10
–30
–25
–5
0
Figure 31. Input P1dB vs. Frequency, BAND = 1.8 V
Data Sheet ADL5721
Rev. 0 | Page 13 of 15
EVALUATION BOARD
The ADL5721-EVALZ comes with an ADL5721 chip. It supports
a single 5 V supply for ease of use. For 5 V operation, the 3.3 V
and 1.8 V test loops are for evaluation purposes only. When the
3.3 V and 1.8 V supply is used, remove the R1 and R2 resistors
from the evaluation board. Figure 34 shows a picture of the
ADL5721-EVALZ lab bench setup.
The band switch feature allows the input P1dB and noise figure
to trade off for optimum system performance. For the lower
frequency band (BAND = 0 V), short Pin 1 and Pin 2 of the
P1 connector. For the higher frequency band (BAND = 1.8 V),
open Pin 1 and Pin 2 of the P1 connector to obtain better
system performance.
INITIAL SETUP
To set up t he ADL5721-EVALZ, take the following steps:
1. Power up the ADL5721-EVALZ with a 5 V dc supply. The
supply current of the evaluation board is approximately
88 mA, which is a combination of the VCC1 (1.8 V) and
the VCC2 (3.3 V) currents.
2. Connect the signal generator to the input of the ADL5721-
EVALZ.
3. Connect RFOP and RFON to a 180° hybrid that can work
within the 5.9 GHz to 8.5 GHz frequency range.
4. Connect the difference output of the hybrid to the spectrum
analyzer. Terminate the sum port of the hybrid to 50 Ω.
See Figure 34 for the ADL5721-EVALZ lab bench setup.
RESULTS
Figure 32 and Figure 33 show the expected results when testing
the ADL5721-EVALZ using the Rev. A version of the evaluation
board and its software. Note that future iterations of the software
may produce different results. See the ADL5721 product page
for the most recent software version.
Figure 32 shows the results of the differential output for an input
of 7.2 GHz at −15 dBm with a BAND = 0 V, with Pin 1 and Pin 2
of the P1 connector shorted. The hybrid and board loss were
not deembedded.
POWER OUTPUT (dBm)
20
10
0
–10
–20
–30
–40
–50
–60
–70
–80
7.15 7.177.16 7.18 7.19 7.21 7.237.20 7.22 7.24 7.25
FREQUENCY (GHz)
2
14258-036
RESOLUTION BANDWIDTH = 20kHz
VIDEO BANDWIDTH = 20kHz
SWEEP = 301ms (1001pts)
Figure 32. Results of the ADL5721 with an Input of 7.2 GHz at −15 dBm,
BAND = 0 V
Figure 33 shows the results of the differential output for an
input of 8.5 GHz at −15 dBm with a BAND = 1.8 V, with Pin 1
and Pin 2 of the P1 connector open. The hybrid and board loss
were not deembedded.
20
10
0
–10
–20
–30
–40
–50
–60
–70
–80
2
POWER OUTPUT (dBm)
14258-037
8.45 8.478.46 8.48 8.49 8.51 8.538.50 8.52 8.54 8.55
FREQUENCY (GHz)
RESOLUTION BANDWIDTH = 20kHz
VIDEO BANDWIDTH = 20kHz
SWEEP = 301ms (1001pts)
Figure 33. Results of the ADL5721 with an Input of 8.5 GHz at −15 dBm,
BAND = 1.8 V
+5V DC GND
BAND
INPUT
180° HYBRID FOR DIFFERENTIAL
TO SINGLE-ENDED OUTPUT
RF FREQUENCY GENERATOR
RFOP
SPECTRUM
ANALYZER
RFON
14258-035
Figure 34. ADL5721-EVALZ Lab Bench Setup
ADL5721 Data Sheet
Rev. 0 | Page 14 of 15
BASIC CONNECTIONS FOR OPERATION
Figure 35 shows the basic connections for operating the ADL5721 as it is implemented on the evaluation board of the device.
ADL5721
25-146-1000-92
ADM7170ACPZ-1.8 ADM7172ACPZ-3.3
RED
4.7UF
1000PF
4.7UF
0
4.7UF
0
1000PF
4.7UF
69157-102
0.1UF 33PF 33PF 0.1UF
0
10K
CNSRI2516100092_SW109201A5
4.7NF
442
RED RED BLK
CNSRI2516100092_SW109201A5
CNSRI2516100092_SW109201A5
25-146-1000-92
25-146-1000-92
4.7NF C4C1 C2 C3 C6
C5
RFIN
RBIAS
P1
R3
U1 U2
C8
C7
R1
C9 C12
C11
R2
C10
5V GND3P3V 1P8V
R4
572X_RFON
572X_RFOP
DUTA
1.8V
5V
5V 3.3V
3.3V
3.3V
1.8V
1.8V
5V
1.8V
RFIN
OUTN
OUTP
BAND
1
1
2
5
3
4
8
7
1
25
PAD 6
PAD 6
3
4
8
7
1
2
1 11 1
1
1
4 3 2
4 3 2
432 5
2
37
6
PAD
4
1 8
AGND
AGND
AGND AGND
OUTN
OUTPINPT
PAD
VCC2
BANDRBIAS
GND
VCC1
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
EP
VIN
VIN
GND
EN
SS
SENSE
VOUT
VOUT
EP
VIN
VIN
GND
EN
SS
SENSE
VOUT
VOUT
AGND
AGND
AGND
AGND
AGND
AGND AGND
AGND
AGND
14258-034
Figure 35. Evaluation Board Schematic
Table 6. Evaluation Board Configuration Options
Component Function Default Condition
3P3V, 1P8V, GND, 5V Power supplies and ground. Not applicable
RFIN, 572X_RFOP, 572x_RFON, BAND Input, output, and data. Not applicable
RBIAS 442 Ω for RBIAS. RBIAS = 442 Ω (0402)
R1, R2 1.8 V and 3.3 V regulator connections. R1, R2 = 0 Ω (0402)
R3 Band select. R3 = 0 Ω (0603)
R4
Pull-up or pull-down resistor.
R4 = 10 kΩ (0402)
C1 to C12 The capacitors provide the required decoupling of the supply
related pins.
C1, C4 = 4.7 nF (0402),
C2, C3 = 33 pF (0402),
C5, C6 = 0.1 µF (0402),
C7, C9, C10, C12 = 4.7 µF (0603),
C8, C11 = 1000 pF (0603)
P1 Jumper to change bands, 2-pin jumper. Not applicable
U1 ADM7170ACPZ-1.8 1.8 V regulator. Not applicable
U2 ADM7172ACPZ-3.3 3.3 V regulator. Not applicable
DUTA ADL5721 device under test (DUT). Not applicable
Data Sheet ADL5721
Rev. 0 | Page 15 of 15
OUTLINE DIMENSIONS
1.70
1.60
1.50
0.425
0.350
0.275
TOP VIEW
8
1
5
4
0.30
0.25
0.20
BOTTOM VIEW
PIN 1 INDEX
AREA
SEATING
PLANE
0.60
0.55
0.50
1.10
1.00
0.90
0.20 REF
0.15 REF
0.05 MAX
0.02 NO M
0.50 BSC
EXPOSED
PAD
PIN 1
INDICATOR
(R 0.15)
FO R P ROPE R CONNECT ION OF
THE EXPOSED PAD, REFER TO
THE P IN CO NFIGURATION AND
FUNCT IO N DE S CRIPT IONS
SECTION OF THIS DATA SHEET.
01-14-2013-C
2.10
2.00 SQ
1.90
Figure 36. 8-Lead Lead Frame Chip Scale Package [LFCSP]
2.00 mm × 2.00 mm Body and 0.55 mm Package Height
(CP-8-10)
Dimensions shown in millimeters
ORDERING GUIDE
Model1 Temperature Range Package Description Package Option
ADL5721ACPZN −40°C to +85°C 8-Lead Lead Frame Chip Scale Package [LFCSP] CP-8-10
ADL5721ACPZN-R7 −40°C to +85°C 8-Lead Lead Frame Chip Scale Package [LFCSP] CP-8-10
ADL5721-EVALZ
Evaluation Board
1 Z = RoHS-Compliant Part.
©2016 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D14258-0-4/16(0)