Datasheet > ADA4961

ADA4961

更新时间： 2024-11-27 14:58:23

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亚德诺 - ADI		/
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描述
低失真3.2 GHz RF DGA

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ADA4961 数据手册

Low Distortion, 3.2 GHz, RF DGA

Data Sheet

ADA4961

FEATURES

FUNCTIONAL BLOCK DIAGRAM

High speed

−3 dB bandwidth: 3.2 GHz

−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

VOUT+

VIN+

0dB TO 21dB

ATTEN

+15dB

VIN–

VOUT–

DNC

GND

DNC

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 A_V= 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 LFCSP

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. C

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.

Technical Support

www.analog.com

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ADA600F-24-E	RSG	获取价格	Hight power & peak power, Parallel / master-slave / N+1 redundant (optional), Current moni
ADA600F-24-F	RSG	获取价格	Hight power & peak power, Parallel / master-slave / N+1 redundant (optional), Current moni
ADA600F-24-G	RSG	获取价格	Hight power & peak power, Parallel / master-slave / N+1 redundant (optional), Current moni
ADA600F-24-J	RSG	获取价格	Hight power & peak power, Parallel / master-slave / N+1 redundant (optional), Current moni
ADA600F-24-N	RSG	获取价格	Hight power & peak power, Parallel / master-slave / N+1 redundant (optional), Current moni
ADA600F-24-R	RSG	获取价格	Hight power & peak power, Parallel / master-slave / N+1 redundant (optional), Current moni

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