ANALOG DEVICES ADL5350 Service Manual
LF to 4 GHz
R
FEATURES
Broadband radio frequency (RF), intermediate frequency (IF),
and local oscillator (LO) ports
Conversion loss: 6.8 dB
Noise figure: 6.5 dB
High input IP3: 25 dBm
High input P1dB: 19 dBm
Low LO drive level
Single-ended design: no need for baluns
Single-supply operation: 3 V @ 19 mA
Miniature, 2 mm × 3 mm, 8-lead LFCSP
RoHS compliant
APPLICATIONS
Cellular base stations
Point-to-point radio links
RF instrumentation
High Linearity Y-Mixer
ADL5350
FUNCTIONAL BLOCK DIAGRAM
GND
ADL5350
RF IF
LO
LO
INPUT
Figure 1.
3V
RF
INPUT OR
OUTPUT
VPOS
OUTPUT O
INPUT
GND
IF
05615-001
GENERAL DESCRIPTION
The ADL5350 is a high linearity, up-and-down converting
mixer capable of operating over a broad input frequency range.
It is well suited for demanding cellular base station mixer designs
that require high sensitivity and effective blocker immunity. Based
on a GaAs pHEMT, single-ended mixer architecture, the ADL5350
provides excellent input linearity and low noise figure without
the need for a high power level LO drive.
In 850 MHz/900 MHz receive applications, the ADL5350
provides a typical conversion loss of only 6.7 dB. The input IP3
is typically greater than 25 dBm, with an input compression
point of 19 dBm. The integrated LO amplifier allows a low LO
drive level, typically only 4 dBm for most applications.
The high input linearity of the ADL5350 makes the device an
excellent mixer for communications systems that require high
blocker immunity, such as GSM 850 MHz/900 MHz and
800 MHz CDMA2000. At 2 GHz, a slightly greater supply
current is required to obtain similar performance.
The single-ended broadband RF/IF port allows the device to be
customized for a desired band of operation using simple external
filter networks. The LO-to-RF isolation is based on the LO
rejection of the RF port filter network. Greater isolation can be
achieved by using higher order filter networks, as described in
the
Applications Information section.
The ADL5350 is fabricated on a GaAs pHEMT, high performance
IC process. The ADL5350 is available in a 2 mm × 3 mm, 8-lead
LFCSP. It operates over a −40°C to +85°C temperature range.
An evaluation board is also available.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved.
ADL5350
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
850 MHz Receive Performance .................................................. 3
1950 MHz Receive Performance ................................................ 3
Spur Tables......................................................................................... 4
850 MHz Spur Table..................................................................... 4
1950 MHz Spur Table................................................................... 4
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Typical Perf or m an c e Charac t e r istics ..............................................7
850 MHz Characteristics..............................................................7
1950 MHz Characteristics......................................................... 12
Functional Description .................................................................. 17
Circuit Description .................................................................... 17
Implementation Procedure....................................................... 17
Applications Information.............................................................. 19
Low Frequency Applications .................................................... 19
High Frequency Applications................................................... 19
Evaluation Board ............................................................................ 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 22
REVISION HISTORY
2/08—Revision 0: Initial Version
Rev. 0 | Page 2 of 24
ADL5350
SPECIFICATIONS
850 MHz RECEIVE PERFORMANCE
VS = 3 V, TA = 25°C, LO power = 4 dBm, re: 50 Ω, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Conditions
RF Frequency Range 750 850 975 MHz
LO Frequency Range 500 780 945 MHz Low-side LO
IF Frequency Range 30 70 250 MHz
Conversion Loss 6.7 dB fRF = 850 MHz, fLO = 780 MHz, fIF = 70 MHz
SSB Noise Figure 6.4 dB fRF = 850 MHz, fLO = 780 MHz, fIF = 70 MHz
Input Third-Order Intercept (IP3) 25 dBm
Input 1dB Compression Point (P1dB) 19.8 dBm fRF = 820 MHz, fLO = 750 MHz, fIF = 70 MHz
LO-to-IF Leakage 29 dBc LO power = 4 dBm, fLO = 780 MHz
LO-to-RF Leakage 13 dBc LO power = 4 dBm, fLO = 780 MHz
RF-to-IF Leakage 19.5 dBc RF power = 0 dBm, fRF = 850 MHz, fLO = 780 MHz
IF/2 Spurious −50 dBc RF power = 0 dBm, fRF = 850 MHz, fLO = 780 MHz
Supply Voltage 2.7 3 3.5 V
Supply Current 16.5 mA LO power = 4 dBm
= 849 MHz, f
f
RF1
each RF tone 0 dBm
= 850 MHz, fLO = 780 MHz, fIF = 70 MHz;
RF2
1950 MHz RECEIVE PERFORMANCE
VS = 3 V, TA = 25°C, LO power = 6 dBm, re: 50 Ω, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Conditions
RF Frequency Range 1800 1950 2050 MHz
LO Frequency Range 1420 1760 2000 MHz Low-side LO
IF Frequency Range 50 190 380 MHz
Conversion Loss 6.8 dB fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz
SSB Noise Figure 6.5 dB fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz
Input Third-Order Intercept (IP3) 25 dBm
Input 1dB Compression Point (P1dB) 19 dBm fRF = 1950 MHz, fLO = 1760 MHz, fIF = 190 MHz
LO-to-IF Leakage 13.5 dBc LO power = 6 dBm, fLO = 1760 MHz
LO-to-RF Leakage 10.5 dBc LO power = 6 dBm, fLO = 1760 MHz
RF-to-IF Leakage 11.5 dBc RF power = 0 dBm, fRF = 1950 MHz, fLO = 1760 MHz
IF/2 Spurious −54 dBc RF power = 0 dBm, fRF = 1950 MHz, fLO = 1760 MHz
Supply Voltage 2.7 3 3.5 V
Supply Current 19 mA LO power = 6 dBm
= 1949 MHz, f
f
RF1
each RF tone 0 dBm
RF2
= 1951 MHz, fLO = 1760 MHz, fIF = 190 MHz;
Rev. 0 | Page 3 of 24
ADL5350
SPUR TABLES
All spur tables are (N × fRF) − (M × fLO) mixer spurious products for 0 dBm input power, unless otherwise noted. N.M. indicates that a
spur was not measured due to it being at a frequency >6 GHz.
850 MHz SPUR TABLE
Table 3.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 ≤–100 –20.6 –19.2 –15.3 –16.7 –38.4 –26.6 –22.1 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M .
1 –21.6 –5.6 –23. 6 –19. 6 –31.9 –28.7 –46.1 –48.5 –33. 2 N. M. N.M. N. M. N.M. N.M. N. M. N.M.
2 –50.0 –69.2 –50.5 –59.8 –49. 1 –57.5 –51.0 –77.7 –65.8 –60. 8 N.M. N.M. N. M. N.M. N.M. N.M.
3 –74.8 –66.0 –71.8 –68.1 –70. 2 –67.4 –66.9 –70.8 –85.2 –87. 3 –72.2 N. M. N.M. N.M. N.M . N.M.
4 ≤–100 –92.6 –91.6 –96.1 –92.7 –98.7 –90.2 –91.7 –88.8 ≤–100 ≤–100 –91.7 –88.6 N.M. N.M. N.M.
5 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 –99.5 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M. N .M.
6 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M.
N
7 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
8 N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
9 N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
10 N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
11 N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
12 N.M. N.M. N.M. N.M. N.M. N. M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
13 N.M. N.M. N.M. N.M. N.M. N. M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
14 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
15 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
1950 MHz SPUR TABLE
M
05615–068
Table 4.
0 ≤–100 –13.1 –32.8 –22.4 N.M. N.M. N. M. N.M . N.M. N.M. N.M. N.M . N.M. N.M. N.M. N. M.
1 –10. 8 –7. 0 –25.3 – 27.7 –33. 9 N.M. N.M. N.M. N.M. N.M. N.M . N.M. N. M. N.M. N. M. N. M.
2 –48. 2 –61. 2 –41. 2 –44.6 –47.0 –74.6 N.M. N.M. N.M. N.M. N. M. N.M . N.M. N.M. N.M. N. M.
3 –72. 3 –71. 4 –83. 6 –64.5 –62.4 –64.3 –83.7 N.M. N. M. N.M. N.M . N.M. N. M. N.M. N. M. N. M.
4 N. M. N.M. –91. 4 –84.2 –78.3 –76.5 –80.0 –92.0 N.M. N. M. N.M. N.M. N.M. N. M. N.M. N.M.
5 N. M. N.M. N.M . –90.8 –82.3 –77.1 –79.5 –83.8 –95.2 N. M. N.M. N.M. N.M. N.M. N.M. N.M.
6 N.M.N.M.N.M.N.M.≤–100 ≤–100 –93.4 –94.5 ≤–100 –99.2 ≤–100 N.M. N.M. N.M. N. M. N.M.
N
7 N.M.N.M.N.M.N.M.N.M.≤–100 ≤–100 –94.0 –96.4 ≤–100 ≤–100 ≤–100 N.M. N. M. N.M. N.M.
8 N.M.N.M.N.M.N.M.N.M.N.M.≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M . N.M. N.M.
9 N.M.N.M.N.M.N.M.N.M.N.M.N.M.≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N .M. N. M.
10 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 N.M.
11 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
12 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
13 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100 ≤–100 ≤–100
14 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100 ≤–100
15 N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. N.M. ≤–100 ≤–100
0123456789101112131415
M
05615–069
Rev. 0 | Page 4 of 24
ADL5350
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter Rating
Supply Voltage, VS 4.0 V
RF Input Level 23 dBm
LO Input Level 20 dBm
Internal Power Dissipation 324 mW
θJA 154.3°C/W
Maximum Junction Temperature 135°C
Operating Temperature Range −40°C to +85°C
Storage Temperature Range −65°C to +150°C
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.
ESD CAUTION
Rev. 0 | Page 5 of 24
ADL5350
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1RF/IF
2GND2
ADL5350
TOP VIEW
3LOIN
(Not to Scale)
4NC
NC = NO CONNECT
Figure 2. Pin Configuration
8 RF/IF
7NC
6 VPOS
5 GND1
05615-002
Table 6. Pin Function Descriptions
Pin No. Mnemonic Description
1, 8 RF/IF
RF and IF Input/Output Ports. These nodes are internally tied together. RF and IF port separation is
achieved using external tuning networks.
2, 5, Paddle GND2, GND1, GND Device Common (DC Ground).
3 LOIN LO Input. Needs to be ac-coupled.
4, 7 NC No Connect. Grounding NC pins is recommended.
6 VPOS
Positive Supply Voltage for the Drain of the LO Buffer. A series RF choke is needed on the supply line
to provide proper ac loading of the LO buffer amplifier.
Rev. 0 | Page 6 of 24
ADL5350
TYPICAL PERFORMANCE CHARACTERISTICS
850 MHz CHARACTERISTICS
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
20
19
18
17
16
15
14
13
SUPPLY CURRENT (mA)
12
11
10
–40–200 20406080
TEMPERATURE ( °C)
Figure 3. Supply Current vs. Temperature
10
9
8
7
6
5
4
3
CONVERSION LOSS (dB)
2
1
0
–40 806040200–20
TEMPERATURE ( °C)
Figure 4. Conversion Loss vs. Temperature
28
27
26
25
24
23
22
INPUT IP3 (dBm)
21
20
19
18
–40 806040200–20
TEMPERATURE ( °C)
Figure 5. Input IP3 (IIP3) vs. Temperature
05615-003
05615-004
05615-005
INPUT P1dB (dBm)
22
20
18
16
14
SUPPLY CURRENT (mA)
12
10
7.4
7.2
7.0
6.8
6.6
6.4
CONVERSION LOSS (dB)
6.2
6.0
23
22
21
20
19
18
17
16
15
14
13
–40 806040200–20
TEMPERATURE ( °C)
Figure 6. Input P1dB vs. Temperature
+25°C
–40°C +85°C
2.7 3.53.43.33.23.13.02.92.8
SUPPLY VOLTAGE (V)
Figure 7. Supply Current vs. Supply Voltage
2.7 3.53.43.33.23.13.02.92.8
SUPPLY VOLTAGE (V)
Figure 8. Conversion Loss vs. Supply Voltage
+85°C
+25°C
–40°C
05615-006
05615-007
05615-008
Rev. 0 | Page 7 of 24
ADL5350
Supply voltage = 3 V, RF frequency = 850 MHz, IF frequency = 70 MHz, RF level = 0 dBm, LO level = 4 dBm, TA = 25°C, unless otherwise noted.
28
22
INPUT IP3 (dBm)
INPUT P1dB (dBm)
27
26
25
24
23
22
2.7 3.53.43.33.23.13.02.92.8
23
22
21
20
19
18
17
+85°C
SUPPLY VOLTAGE (V)
Figure 9. Input IP3 vs. Supply Voltage
–40°C
+25°C
+85°C
–40°C
+25°C
20
18
16
14
SUPPLY CURRENT (mA)
12
10
750 975950925900875850825800775
05615-009
–40°C
+25°C
RF FREQUENCY ( MHz)
+85°C
05615-012
Figure 12. Supply Current vs. RF Frequency
7.6
7.4
7.2
7.0
6.8
6.6
6.4
CONVERSION LOSS (dB)
6.2
6.0
+85°C
+25°C
–40°C
NOISE FI GURE (dB)
16
2.7 3.53.43.33.23.13.02.92.8
SUPPLY VOLTAGE (V)
Figure 10. Input P1dB vs. Supply Voltage
8.0
7.5
7.0
6.5
6.0
5.5
5.0
2.7 3. 53.43.33.23.13.02.92.8
SUPPLY VOLTAGE (V)
Figure 11. Noise Figure vs. Supply Voltage
05615-010
05615-011
5.8
750 800 850 900 950
RF FREQUENCY (M Hz)
Figure 13. Conversion Loss vs. RF Frequency
27.0
26.5
INPUT IP3 (dBm)
26.0
25.5
25.0
24.5
24.0
23.5
23.0
22.5
22.0
750 975950925900875850825800775
+85°C
RF FREQUENCY (M Hz)
–40°C
+25°C
Figure 14. Input IP3 vs. RF Frequency
05615-013
05615-014
Rev. 0 | Page 8 of 24
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