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The ADA4961 is a high performance BiCMOS RF digital gain amplifier (DGA) optimized for driving heavy loads (≥2.0 GHz). It achieves typical IMD3 performance of ~90 dBc at 500 MHz and ~85 dBc at 1.5 GHz. This RF performance enables the best performance of GHz-level converters and, unlike typical GaAs amplifiers, has minimal constraints on the driver amplifier or overall power consumption. The device can easily drive 10-bit to 16-bit HS converters.

Antialiasing filter (AAF) design can be simplified or eliminated for many receiver applications.

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 digital trim capability has 1 dB resolution to optimize the signal-to-noise ratio (SNR) over a 21 dB input level range.

The ADA4961 has high bandwidth and low distortion performance up to 2 GHz. These features, along with wide gain adjustment and relatively low power consumption, make it the amplifier of choice for many high-speed applications, including IF, RF, and broadband applications where dynamic range at very high frequencies is critical.

Not only is the ADA4961 ideal for driving analog-to-digital converters (ADCs), it can also be used in mixers, PIN diode attenuators, SAW filters, and multi-component discrete devices. It is packaged in a 4mm × 4mm, 24-lead LFCSP and has an operating temperature range of ?40°C to +85°C.

application

ADC driver for 10-bit to 14-bit GSPS converter

RF/IF Gain Blocks

line driver

Instrumentation

Satellite Communications

data collection

military system

high speed

?3 dB bandwidth: 3.2 GHz

-1 dB bandwidth: 1.8 GHz

Slew rate: 12,000 V/μs

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 Startup

MD3/HD3 distortion, maximum gain, 5 V, high performance (HP) mode

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

Shenzhen Yujixin Electronics Co., Ltd.

Contact: Mr. Xiao

Mobile: +86-134-3077-2257 (same number on WeChat)

Tel: +86-0755-2870-8773

QQ: 1157099927 2039672975

E-mail: xiaozheng1608@163.com

Address of Shenzhen Office: Room B17, West 5th Floor, Building 4, SEG Science and Technology Park, Huaqiang North, Futian District, Shenzhen