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ADA4961ACPZN-R7

更新时间： 2024-11-26 21:20:31
品牌 Logo 应用领域
亚德诺 - ADI 电信信息通信管理电信集成电路
页数 文件大小 规格书
25页 957K
描述
Low Distortion, 3.2 GHz, RF DGA

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ADA4961ACPZN-R7 数据手册

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Low Distortion, 3.2 GHz, RF DGA  
Data Sheet  
ADA4961  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
High speed  
−3 dB bandwidth: 3.2 GHz  
24  
23  
22  
21  
20  
19  
−1 dB bandwidth: 1.8 GHz  
Slew rate: 12,000 V/μs  
EXPOSED  
PAD  
ADA4961  
Digitally adjustable gain  
Voltage gain: −6 dB to +15 dB  
Power gain: −3 dB to +18 dB  
5-bit parallel or SPI bus gain control with fast attack  
IMD3/HD3 distortion, maximum gain, 5 V, high performance  
(HP) mode  
2
3
17  
16  
VOUT+  
VIN+  
0dB TO 21dB  
ATTEN  
+15dB  
VIN–  
VOUT–  
DNC  
18  
15  
14  
4
5
GND  
GND  
DNC  
DNC  
1
7
8
9
10  
11  
12  
13  
6
IMD3/HD3 at 1 GHz: −90 dBc/−83 dBc  
IMD3/HD3 at 1.5 GHz: −85 dBc/−75 dBc  
IMD3/HD3 at 2 GHz: −70 dBc/−70 dBc  
Low noise  
NOTES  
1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.  
Noise density referred to output (RTO): −154 dBm/Hz  
Noise figure: 5.5 dB at AV = 15 dB, 1 GHz  
Differential impedances: 100 Ω input, 50 Ω output  
Low power mode operation, power-down control  
Single 3.3 V or 5 V supply operation  
Available in 24-lead, 4 mm × 4 mm LFSCP  
Figure 1.  
APPLICATIONS  
ADC driver for 10-bit to 14-bit GSPS converters  
RF/IF gain blocks  
Line drivers  
Instrumentation  
Satellite communications  
Data acquisition  
Military systems  
GENERAL DESCRIPTION  
The ADA4961 is a high performance, BiCMOS RF digital gain  
amplifier (DGA), optimized for driving heavy loads out to  
2.0 GHz and beyond. The device typically achieves −90 dBc  
IMD3 performance at 500 MHz and −85 dBc at 1.5 GHz. This  
RF performance allows GHz converters to achieve their optimum  
performance with minimal limitations of the driver amplifier or  
constraints on overall power that typically result from GaAs  
amplifiers. This device can easily drive 10-bit to16-bit HS  
converters.  
digital adjustability provides for 1 dB resolution, thus optimizing  
the signal-to-noise ratio (SNR) for input levels spanning 21 dB.  
The ADA4961 is optimized for wideband, low distortion  
performance at frequencies up to 2 GHz. These attributes,  
together with wide gain adjustment and relatively low power,  
make the ADA4961 the amplifier of choice for many high speed  
applications, including IF, RF, and broadband applications  
where dynamic range at very high frequencies is critical.  
The ADA4961 is ideally suited for driving not only analog-to-  
digital converters (ADCs), but also mixers, pin diode  
attenuators, SAW filters, and multielement discrete devices. It is  
available in a 4 mm × 4 mm, 24-lead LFCSP and operates over a  
temperature range of −40°C to +85°C.  
For many receiver applications, antialias filter (AAF) designs  
can be simplified or not required.  
The ADA4961 has an internal differential input impedance of  
100 Ω and a differential dynamic output impedance of 50 Ω,  
eliminating the need for external termination resistors. The  
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  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Technical Support  
©2014 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
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