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ADA4960-1_17

更新时间： 2024-11-24 01:18:35
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5 GHz, Low Distortion lADC Driver/Line Driver

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ADA4960-1_17 数据手册

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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  
Document Feedback  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
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.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 ©2010–2017 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
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