5 GHz, Low Distortion
ADC Driver/Line Driver
ADA4960-1
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
−3 dB bandwidth of 5 GHz (AV = 6 dB)
Single resistor programmable gain: 0 dB to 18 dB
Differential or single-ended input to differential output
Low harmonic distortion (HD2/HD3 @ AV = 6 dB)
−88/−69 dBc @ 250 MHz
VCC
BIAS CELL
PD
VOCM
VIP
IIP
VOP
−77/−66 dBc @ 500 MHz
R
−73/−72 dBc @ 1 GHz
G
IIN
VON
GND
IMD3 @ 1 GHz = −63 dBc
Slew rate
VIN
8700 V/µs (AV = 6 dB, 2 V step)
6600 V/μs (AV = 18 dB, 2 V step)
Fast settling: 1 ns to 1%, 1.4 ns to 0.1%
Fast overdrive recovery: 6.7 ns to 1%, 9.3 ns to 0.5%
Single-supply operation: 5 V
ADA4960-1
Figure 1.
1.2
1.0
A
= 6dB
V
0.1 dB gain flatness to 300 MHz
DC level translation
A
= 18dB
V
0.8
0.6
A
= 12dB
V
80%
Available in 16-lead LFCSP
0.4
0.2
APPLICATIONS
A
(dB) SLEW RATE (V/µs)
V
0
–0.2
–0.4
Differential ADC drivers for giga-sample ADCs
GBPS line drivers with pre-emphasis
High speed data acquisition
6
8700
7700
6600
12
18
20%
–0.6
–0.8
–1.0
Electronic surveillance countermeasures
Pulse capture and conditioning
Oscilloscopes
–1.2
–0.2
Satellite communications
0
0.2
0.4
TIME (ns)
0.6
0.8
1.0
Single-ended-to-differential converters
RF/IF gain blocks
Figure 2. Rise Time, VOUT = 2 V p-p, TA = 25°C,
For AV = 6 dB, AV = 12 dB, and AV = 18 dB
GENERAL DESCRIPTION
The ADA4960-1 is a high performance, differential amplifier
optimized for RF and IF applications. It achieves better than 63 dB
IMD3 performance for frequencies up to and beyond 1 GHz,
making it an ideal driver for 8-bit to 10-bit giga-sample analog-
to-digital converters (ADCs).
The device is optimized for the best combination of slew rate,
bandwidth, and broadband distortion. These attributes allow it
to drive a wide variety of ADCs. It is ideally suited for driving
mixers, pin diode attenuators, SAW filters, and multi-element
discrete devices.
The buffered inputs of the ADA4960-1 isolate the gain-setting
resistor (RG) from the signal inputs, maintaining a constant 10 kΩ
input resistance, easing matching and input drive requirements.
The ADA4960-1 has a nominal 150 Ω differential output impedance.
The user accessible gain adjust and bandwidth extension features
allow configuration of the ADA4960-1 for line driver and
channel equalization applications.
The quiescent current of the ADA4960-1 is typically 60 mA. When
disabled, it consumes less than 3 mA, offering excellent input-to-
output isolation.
The ADA4960-1 is optimized for wideband, low distortion
performance for frequencies up to and beyond 1 GHz. These
attributes, together with its adjustable gain capability, make this
device the amplifier of choice for general-purpose IF and broad-
band applications where low distortion, noise, and power are critical.
Fabricated on an Analog Devices, Inc., high speed SiGe process,
the ADA4960-1 is available in a compact 3 mm × 3 mm, 16-lead
LFCSP. It operates over the temperature range of −40°C to +85°C.
Rev. A
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rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.
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Tel: 781.329.4700 ©2010–2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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