ANALOG DEVICES ADL5561 Service Manual
2.9 GHz Ultralow Distortion
V
V
V
FEATURES
−3 dB bandwidth of 2.9 GHz (AV = 6 dB)
Low supply current: 40 mA
Pin-strappable gain adjust: 6 dB, 12 dB, 15.5 dB
Differential or single-ended input to differential output
Low noise input stage: 2.1 nV/√Hz RTI at A
Low broadband distortion (Av = 6 dB)
10 MHz: −94 dBc HD2, −87 dBc HD3
70 MHz: −98 dBc HD2, −87 dBc HD3
140 MHz: −95 dBc HD2, −87 dBc HD3
250 MHz: −80 dBc HD2, −73 dBc HD3
IMD3s of −86 dBc @ 250 MHz center
Slew rate: 9.8 V/ns
Fast settling of 2 ns and overdrive recovery of 3 ns
Single-supply operation: 3 V to 3.6 V
Power-down control
Fabricated using the high speed XFCB3 SiGe process
APPLICATIONS
Differential ADC drivers
Single-ended-to-differential conversion
RF/IF gain blocks
SAW filter interfacing
= 12 dB
V
RF/IF Differential Amplifier
ADL5561
FUNCTIONAL BLOCK DIAGRAM
CC
R
F
ENBL
VON
VCOM
VOP
GND
08004-001
VIP2
VIP1
IN1
IN2
R
G2
R
G1
R
G1
R
G2
R
F
ADL5561
GND
Figure 1.
GENERAL DESCRIPTION
The ADL5561 is a high performance differential amplifier
optimized for RF and IF applications. The amplifier offers low
noise of 2.1 nV/√Hz and excellent distortion performance over
a wide frequency range, making it an ideal driver for high speed
8-bit to 16-bit analog-to-digital converters (ADCs).
The ADL5561 provides three gain levels of 6 dB, 12 dB, and 15.5 dB
through a pin-strappable configuration. For the single-ended
input configuration, the gains are reduced to 5.6 dB, 11.1 dB, and
14.1 dB. Using an external series input resistor expands the
amplifier gain flexibility and allows for any gain selection from
0 dB to 15.5 dB.
The quiescent current of the ADL5561 is typically 40 mA and,
when disabled, consumes less than 3 mA, offering excellent
input-to-output isolation.
Rev. C
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.
The device is optimized for wideband, low distortion performance.
These attributes, together with its adjustable gain capability,
make this device the amplifier of choice for general-purpose IF
and broadband applications where low distortion, noise, and power
are critical. This device is optimized for the best combination of
slew speed, bandwidth, and broadband distortion. These attributes
allow it to drive a wide variety of ADCs and make it ideally suited
for driving mixers, pin diode attenuators, SAW filters, and multielement discrete devices.
Fabricated on the Analog Devices, Inc., high speed SiGe process,
the ADL5561 is supplied in a compact 3 mm × 3 mm, 16-lead
LFCSP package and operates over the temperature range of
−40°C to +85°C.
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 ©2009–2011 Analog Devices, Inc. All rights reserved.
ADL5561
TABLE OF CONTENTS
Features.............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram ..............................................................1
General Description......................................................................... 1
Revision History ...............................................................................2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics............................................. 8
Circuit Description......................................................................... 13
Basic Structure............................................................................ 13
REVISION HISTORY
6/11—Rev. B to Rev. C
Changes to Figure 28 and Figure 29............................................. 12
Added Figure 30 and Figure 31; Renumbered Sequentially .....12
Changes to Ordering Guide.......................................................... 21
3/10—Rev A to Rev. B
Changes to Figure 43...................................................................... 21
Changes to Ordering Guide.......................................................... 21
9/09—Rev 0 to Rev. A
Changes to Features Section............................................................ 1
Changes to Table 1............................................................................ 3
Changes to Figure 5.......................................................................... 8
Changes to Figure 9 and Figure 10................................................. 9
Changes to Equation 1, Figure 32, and Figure 34....................... 15
Changes to Equation 2................................................................... 16
Changes to Figure 38, Figure 39, Figure 40, and Table 9........... 17
Changes to Figure 43...................................................................... 19
Moved Table 14 to ......................................................................... 19
5/09—Revision 0: Initial Version
Applications Information.............................................................. 14
Basic Connections...................................................................... 14
Input and Output Interfacing................................................... 15
Gain Adjustment and Interfacing ............................................ 16
ADC Interfacing......................................................................... 16
Layout Considerations............................................................... 18
Soldering Information............................................................... 19
Evaluation Board........................................................................ 19
Outline Dimensions....................................................................... 21
Ordering Guide .......................................................................... 21
Rev. C | Page 2 of 24
ADL5561
SPECIFICATIONS
VCC = 3.3 V, VCOM = 1.65 V, RL = 200 Ω differential, AV = 6 dB, CL = 1 pF differential, f = 140 MHz, TA = 25°C.
Table 1.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth AV = 6 dB, V
A
A
= 12 dB, V
V
= 15.5 dB, V
V
Bandwidth for 0.1 dB Flatness AV = 6 dB, V
A
A
= 12 dB, V
V
= 15.5 dB, V
V
Gain Accuracy AV = 6 dB, RL = open 0.15 dB
A
A
= 12 dB, RL = open 0.05 dB
V
= 15.5 dB, RL = open 0.05 dB
V
Gain Supply Sensitivity VCC ± 10% −0.023 dB/V
Gain Temperature Sensitivity −40°C to +85°C, AV =15.5 dB 0.24 mdB/°C
Slew Rate Rise, AV = 15.5 dB, RL= 200 Ω, V
Fall, AV = 15.5 dB, RL = 200 Ω, V
Settling Time 2 V step to 1% 2 ns
Overdrive Recovery Time VIN = 4 V to 0 V step, V
Reverse Isolation (S12) 60 dB
INPUT/OUTPUT CHARACTERISTICS
Output Common Mode VCC/2 V
Voltage Adjustment Range 1.4 to 1.8 V
Maximum Output Voltage Swing 1 dB compressed 4.3 V p-p
Output Common-Mode Offset Referenced to VCC/2 25 mV
Output Common-Mode Drift −40°C to +85°C 170 μV/°C
Output Differential Offset Voltage 1 mV
CMRR 65 dB
Output Differential Offset Drift −40°C to +85°C 15 μV/°C
Input Bias Current 3 μA
Input Resistance (Differential) AV = 6 dB 400 Ω
A
A
Input Resistance (Single-Ended)1 A
A
A
= 12 dB 200 Ω
V
= 15.5 dB 133 Ω
V
= 5.6 dB, RS = 50 Ω 307 Ω
V
= 11.1 dB, RS = 50 Ω 179 Ω
V
= 14.1 dB, RS = 50 Ω 132 Ω
V
Input Capacitance (Single-Ended) 0.3 pF
Output Resistance (Differential) 12 Ω
POWER INTERFACE
Supply Voltage 3 3.3 3.6 V
ENBL Threshold Device disabled, ENBL low 0.6 V
Device enabled, ENBL high 1.3 V
ENBL Input Bias Current ENBL high −27 μA
ENBL low −300 μA
Quiescent Current ENBL high 37 40 44.5 mA
ENBL low 3 mA
≤ 1.0 V p-p 2900 MHz
OUT
≤ 1.0 V p-p 2300 MHz
OUT
≤ 1.0 V p-p 1800 MHz
OUT
≤ 1.0 V p-p 200 MHz
OUT
≤ 1.0 V p-p 200 MHz
OUT
≤ 1.0 V p-p 600 MHz
OUT
= 2 V step 9.8 V/ns
OUT
= 2 V step 10.1 V/ns
OUT
≤ ±10 mV 3 ns
OUT
Rev. C | Page 3 of 24
ADL5561
Parameter Conditions Min Typ Max Unit
10 MHz NOISE/HARMONIC PERFORMANCE
Second/Third Harmonic Distortion AV = 6 dB, RL = 200 Ω, V
A
A
Output Third-Order Intercept/Third-Order
Intermodulation Distortion
= 12 dB, RL = 200 Ω, V
V
= 15.5 dB, RL = 200 Ω, V
V
AV= 6 dB, RL = 200 Ω, V
composite (2 MHz spacing)
= 12 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
= 15.5 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
Noise Spectral Density (RTI) AV = 6 dB 3 nV/√Hz
A
A
= 12 dB 2.1 nV/√Hz
V
= 15.5 dB 1.7 nV/√Hz
V
1 dB Compression Point (RTO) AV = 6 dB 19 dBm
A
A
= 12 dB 19 dBm
V
= 15.5 dB 19 dBm
V
70 MHz NOISE/HARMONIC PERFORMANCE
Second/Third Harmonic Distortion AV = 6 dB, RL = 200 Ω, V
A
A
Output Third-Order Intercept/Third-Order
Intermodulation Distortion
= 12 dB, RL = 200 Ω, V
V
= 15.5 dB, RL = 200 Ω, V
V
AV = 6 dB, RL = 200 Ω, V
composite (2 MHz spacing)
= 12 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
= 15.5 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
Noise Spectral Density (RTI) AV = 6 dB 3 nV/√Hz
A
A
= 12 dB 2.1 nV/√Hz
V
= 15.5 dB 1.7 nV/√Hz
V
1 dB Compression Point (RTO) AV = 6 dB 19 dBm
A
A
= 12 dB 18.9 dBm
V
= 15.5 dB 18.9 dBm
V
140 MHz NOISE/HARMONIC PERFORMANCE
Second/Third Harmonic Distortion AV = 6 dB, RL = 200 Ω, V
A
A
Output Third-Order Intercept/Third-Order
Intermodulation Distortion
= 12 dB, RL = 200 Ω, V
V
= 15.5 dB, RL = 200 Ω, V
V
AV = 6 dB, RL = 200 Ω, V
composite (2 MHz spacing)
= 12 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
= 15.5 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
Noise Spectral Density (RTI) AV = 6 dB 3 nV/√Hz
A
A
= 12 dB 2.1 nV/√Hz
V
= 15.5 dB 1.7 nV/√Hz
V
1 dB Compression Point (RTO) AV = 6 dB 19.1 dBm
A
A
= 12 dB 18.8 dBm
V
= 15.5 dB 18.7 dBm
V
= 2 V p-p −94/−87 dBc
OUT
= 2 V p-p −92/−88 dBc
OUT
= 2 V p-p −95/−87 dBc
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 2 V p-p −98/−87 dBc
OUT
= 2 V p-p −93/−83 dBc
OUT
= 2 V p-p −93/−82 dBc
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 2 V p-p −95/−87 dBc
OUT
= 2 V p-p −83/−83 dBc
OUT
= 2 V p-p −83/−82 dBc
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
+42.7/−89 dBm/dBc
+41/−85 dBm/dBc
+40/−85 dBm/dBc
+45/−93 dBm/dBc
+43/−89 dBm/dBc
+41/−86 dBm/dBc
+49/−102 dBm/dBc
+48/−100 dBm/dBc
+39/−96 dBm/dBc
Rev. C | Page 4 of 24
ADL5561
Parameter Conditions Min Typ Max Unit
250 MHz NOISE/HARMONIC PERFORMANCE
Second/Third Harmonic Distortion AV = 6 dB, RL = 200 Ω, V
A
A
Output Third-Order Intercept/Third-Order
Intermodulation Distortion
= 12 dB, RL = 200 Ω, V
V
= 15.5 dB, RL = 200 Ω, V
V
AV = 6 dB, RL = 200 Ω, V
composite (2 MHz spacing)
= 12 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
= 15.5 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
Noise Spectral Density (RTI) AV = 6 dB 3.2 nV/√Hz
A
A
= 12 dB 2.2 nV/√Hz
V
= 15.5 dB 1.7 nV/√Hz
V
1 dB Compression Point (RTO) AV = 6 dB 19.1 dBm
A
A
= 12 dB 18.9 dBm
V
= 15.5 dB 18.7 dBm
V
500 MHz NOISE/HARMONIC PERFORMANCE
Second/Third Harmonic Distortion AV = 6 dB, RL = 200 Ω, V
A
A
Output Third-Order Intercept/Third-Order
Intermodulation Distortion
= 12 dB, RL = 200 Ω, V
V
= 15.5 dB, RL = 200 Ω, V
V
AV = 6 dB, RL = 200 Ω, V
composite (2 MHz spacing)
= 12 dB, RL = 200 Ω, V
A
V
composite( 2 MHz spacing)
= 15.5 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
Noise Spectral Density (RTI) AV = 6 dB 4.1 nV/√Hz
A
A
= 12 dB 2.4 nV/√Hz
V
= 15.5 dB 1.8 nV/√Hz
V
1 dB Compression Point (RTO) AV = 6 dB 16.3 dBm
A
A
= 12 dB 16.4 dBm
V
= 15.5 dB 16.2 dBm
V
1000 MHz NOISE/HARMONIC PERFORMANCE
Second/Third Harmonic Distortion AV = 6 dB, RL = 200 Ω, V
A
A
Output Third-Order Intercept/Third-Order
Intermodulation Distortion
= 12 dB, RL = 200 Ω, V
V
= 15.5 dB, RL = 200 Ω, V
V
AV = 6 dB, RL = 200 Ω, V
composite (2 MHz spacing)
= 12 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
= 15.5 dB, RL = 200 Ω, V
A
V
composite (2 MHz spacing)
Noise Spectral Density (RTI) AV = 6 dB 6 nV/√Hz
A
A
= 12 dB 2.6 nV/√Hz
V
= 15.5 dB 1.8 nV/√Hz
V
1 dB Compression Point (RTO) AV = 6 dB 10.8 dBm
A
A
1
See the section for a discussion of single-ended input, dc-coupled operation. Applications Information
= 12 dB 12.6 dBm
V
= 15.5 dB 12.5 dBm
V
= 2 V p-p −80/−73 dBc
OUT
= 2 V p-p −76/−70 dBc
OUT
= 2 V p-p −78/−72 dBc
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 2 V p-p
OUT
= 1 V p-p −69/−57 dBc
OUT
= 1 V p-p −72/−60 dBc
OUT
= 1V p-p −66/−61 dBc
OUT
= 1 V p-p
OUT
= 1 V p-p
OUT
= 1 V p-p
OUT
= 1 V p-p −58/−53 dBc
OUT
= 1 V p-p −55/−50 dBc
OUT
= 1 V p-p −57/−50 dBc
OUT
= 1 V p-p
OUT
= 1 V p-p
OUT
= 1 V p-p
OUT
+41/−86 dBm/dBc
+40/−84 dBm/dBc
+39/−83 dBm/dBc
+40/−97 dBm/dBc
+36/−90 dBm/dBc
+34/−75 dBm/dBc
+18/−54 dBm/dBc
+18/−56 dBm/dBc
+18/−46 dBm/dBc
Rev. C | Page 5 of 24
ADL5561
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltage (VCC) 3.6 V
VIP1, VIP2, VIN1, VIN2 VCC + 0.5 V
Internal Power Dissipation 155 mW
θJA 98.3°C/W
Maximum Junction Temperature 125°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. C | Page 6 of 24
ADL5561
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
GND
GND
GND
GND
14
13
15
16
PIN 1
INDICATOR
1VIP2
2VIP1
ADL5561
3VIN1
TOP VIEW
(Not to Scale)
4VIN2
5
6
VCC
NOTES
1. EXPOSED P ADDLE. CONNECT TO A LO W
IMPEDANCE THERMAL AND ELECTRI CAL
GROUND PLANE.
VCC
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 VIP2
2 VIP1
3 VIN1
4 VIN2
Balanced Differential Input. Biased to VCOM, typically ac-coupled. Input for A
VIP1 for A
= 15.5 dB.
v
Balanced Differential Input. Biased to VCOM, typically ac-coupled. Input for A
VIP2 for A
= 15.5 dB.
v
Balanced Differential Input. Biased to VCOM, typically ac-coupled. Input for A
VIN2 for A
= 15.5 dB.
v
Balanced Differential Input. Biased to VCOM, typically ac-coupled. Input for A
VIN1 for A
= 15.5 dB.
v
5, 6, 7, 8 VCC Positive Supply.
9 VCOM
Common-Mode Voltage. A voltage applied to this pin sets the common-mode voltage of the input and
output. Typically decoupled to ground with a 0.1 μF capacitor. With no reference applied, input and
output common mode floats to midsupply (VCC/2).
10 VON Balanced Differential Output. Biased to VCOM, typically ac-coupled.
11 VOP Balanced Differential Output. Biased to VCOM, typically ac-coupled.
12 ENBL Enable. Apply positive voltage (1.0 V < ENBL < VCC) to activate device.
13, 14, 15, 16 GND Ground. Connect to low impedance ground.
EP Exposed Paddle. Connect to a low impedance thermal and electrical ground plane.
12 ENBL
11 VOP
10 VON
9VCOM
8
7
VCC
VCC
08004-031
= 12 dB gain, strapped to
V
= 6 dB gain, strapped to
V
= 6 dB gain, strapped to
V
= 12 dB gain, strapped to
V
Rev. C | Page 7 of 24
ADL5561
T
√
TYPICAL PERFORMANCE CHARACTERISTICS
VCC = 3.3 V, VCOM = 1.65 V, RL = 200 Ω differential, AV = 6 dB, CL = 1 pF differential, f = 140 MHz, and TA = 25°C.
16
MAXIMUM GAIN
14
12
MID GAIN
10
GAIN (dB)
8
6
MINIMUM GAIN
4
10M 100M 1G 10G
FREQUENCY ( Hz)
–40°C
+25°C
+85°C
Figure 3. Gain vs. Frequency Response for 200 Ω Differential Load,
= 6 dB, AV = 12 dB, and AV = 15.5 dB over Temperature
A
V
16
MAXIMUM GAIN
14
12
MID GAIN
10
GAIN (dB)
8
6
MINIMUM GAIN
4
10M 100M 1G 10G
FREQUENCY ( Hz)
–40°C
+25°C
+85°C
Figure 4. Gain vs. Frequency Response for 1 kΩ Differential Load
= 6 dB, AV = 12 dB, and AV = 15.5 dB over Temperature
A
V
16
AV MAXIMUM
A
MID
V
14
A
MINIMUM
V
12
10
8
6
NOISE FI GURE (dB)
4
2
0
10 100 1000
FREQUE NCY (MHz)
Figure 5. Noise Figure vs. Frequency at
= 6 dB, AV = 12 dB, and AV = 15.5 dB
A
V
08004-002
08004-003
08004-004
20
19
18
17
16
15
14
MIN GAIN +85°C
OP1dB (dBm)
MIN GAIN +25°C
MIN GAIN –40°C
13
MID GAIN +85°C
MID GAIN +25°C
12
MID GAIN –40°C
MAX GAIN +85°C
11
MAX GAIN +25°C
MAX GAIN –40°C
10
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY ( MHz)
Figure 6. Output P1dB (OP1dB) vs. Frequency at A
= 15.5 dB over Temperature, 200 Ω Differential Load
A
V
25
20
15
MIN GAIN +85°C
OP1dB (dBm)
MIN GAIN +25°C
MIN GAIN –40°C
MID GAIN +85°C
10
MID GAIN +25°C
MID GAIN –40°C
MAX GAIN +85°C
MAX GAIN +25°C
MAX GAIN –40°C
5
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY ( MHz)
Figure 7. Output P1dB (OP1dB) vs. Frequency at A
= 15.5 dB over Temperature, 1 kΩ Differential Load
A
V
8
AV MAXIMUM
A
MID
V
7
A
MINIMUM
Hz)
Y (nV/
NOISE SPECT RAL DENSI
V
6
5
4
3
2
1
0
10 100 1000
FREQUENCY ( MHz)
V
V
Figure 8. Noise Spectral Density vs. Frequency at
= 6 dB, AV = 12 dB, and AV = 15.5 dB
A
V
08004-016
= 6 dB, AV = 12 dB, and
08004-017
= 6 dB, AV = 12 dB, and
08004-015
Rev. C | Page 8 of 24
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