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MAX1422

Maxim Integrated Products
Part Number MAX1422
Manufacturer Maxim Integrated Products
Description 12-Bit 20Msps 3.3V Low-Power ADC
Published Mar 24, 2010
Detailed Description 19-1899; Rev 1; 5/04 www.DataSheet4U.com 12-Bit, 20Msps, 3.3V, Low-Power ADC with Internal Reference General Descripti...
Datasheet PDF File MAX1422 PDF File

MAX1422
MAX1422

Overview
19-1899; Rev 1; 5/04 www.
DataSheet4U.
com 12-Bit, 20Msps, 3.
3V, Low-Power ADC with Internal Reference General Description The MAX1422 3.
3V, 12-bit analog-to-digital converter (ADC) features a fully differential input, pipelined, 12stage ADC architecture with wideband track-and-hold (T/H) and digital error correction incorporating a fully-differential signal path.
The MAX1422 is optimized for lowpower, high dynamic performance applications in imaging and digital communications.
The converter operates from a single 3.
3V supply, consuming only 137mW while delivering a 67dB (typ) signal-to-noise ratio (SNR) at a 5MHz input frequency and a 20Msps sampling frequency.
The fully-differential input stage has a small signal -3dB bandwidth of 400MHz and may be operated with single-ended inputs.
An internal 2.
048V precision bandgap reference sets the ADCs full-scale range.
A flexible reference structure accommodates an internally or externally applied buffered or unbuffered reference for applications requiring increased accuracy or a different input voltage range.
In addition to low operating power, the MAX1422 features two power-down modes, a reference power-down, and a shutdown mode.
In reference power-down, the internal bandgap reference is deactivated, resulting in a 2mA (typ) supply current reduction.
For idle periods, a full shutdown mode is available to maximize power savings.
The MAX1422 provides parallel, offset binary, CMOScompatible three-state outputs.
The MAX1422 is available in a 7mm ✕ 7mm ✕ 1.
4mm, 48-pin TQFP package and is specified over the commercial (0°C to +70°C) and extended industrial (-40°C to +85°C) temperature ranges.
Pin-compatible higher-speed versions of the MAX1422 are also available.
Please refer to the MAX1421 data sheet for 40Msps and the MAX1420 data sheet for 60Msps.
♦ Single 3.
3V Power Supply ♦ 67dB SNR at fIN = 5MHz ♦ Internal 2.
048V Precision Bandgap Reference ♦ Differential Wideband Input T/H Amplifier ♦ Power-Down Modes 130mW (Reference S...


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