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TDA9901TS

Wideband differential digital controlled variable gain amplifier

NXP Semiconductors. 

TDA9901

Wideband differential digital controlled variable gain amplifier

Rev. 04 — 14 August 2008

Product data sheet

1. General description

The TDA9901 is a wideband, low-noise amplifier with differential inputs and outputs. The

TDA9901 incorporates an Automatic Gain Control (AGC) function with digital control. The

TDA9901 is optimized for fast switching between different gain settings, preserving small

phase and amplitude error.

The TDA9901 presents an excellent combination of low noise and good linearity for a wide

input frequency range. The TDA9901 is optimized for processing Input Frequency (IF)

signals. It is also suited for many other applications as a general purpose digitally

controlled variable gain amplifier.

The TDA9901 is able to operate from 4.75 V to 5.25 V supply for the analog part and from

3.0 V to 5.25 V for the digital part.

2. Features

I 130 MHz, −3 dB small signal bandwidth

I Digitally controlled gain

I Transistor-Transistor Logic (TTL) and CMOS compatible digital inputs (3.3 V or 5 V)

I TTL single-ended or differential clock input with

Positive Emitter-Coupled Logic (PECL) compatibility

I 24 dB gain control range

I Four steps of 6 dB plus 6 dB fixed gain

I 30 dB gain maximum

I High impedance differential inputs

I Low impedance differential inputs

I High power supply rejection

I 125 nV/√Hz output voltage noise density at 30 dB gain

I Fast gain settling

I Dual control modes: transparent or latched

3. Applications

I Linear AGC systems

I Wireless infrastructure

I Fixed network

I Instrumentation

I Multipurpose amplifier

I Driver for differential ADCs (e.g. ADC1206S040/055/070 and ADC1006055/070)

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