10-Bit, 40Msps, 3.0V, Low-Power ADC with Internal Reference

The MAX1444 10-bit, 3V analog-to-digital converter (ADC) features a pipelined 10-stage ADC architecture with fully differential wideband track-and-hold (T/H) input and digital error correction incorporating a fully differential signal path. This ADC is optimized for lowpower, high dynamic performance applications in imaging and digital communications. The MAX1444 operates from a single 2.7V to 3.6V supply, consuming only 57mW while delivering a 59.5dB signal-to-noise ratio (SNR) at a 20MHz input frequency. The fully differential input stage has a 400MHz -3dB bandwidth and may be operated with single-ended inputs. In addition to low operating power, the MAX1444 features a 5µA power-down mode for idle periods.

An internal 2.048V precision bandgap reference is used to set the ADC full-scale range. A flexible reference structure allows the user to supply a buffered, direct, or externally derived reference for applications requiring increased accuracy or a different input voltage range.

The MAX1444 has parallel, offset binary, CMOS-compatible three-state outputs that can be operated from 1.7V to 3.6V to allow flexible interfacing. The device is available in a 5mm x 5mm 32-pin TQFP package and is specified over the extended industrial (-40°C to +85°C) temperature range.

Applications

* Baseband and IF Digitization

* CCD Imaging

* Digital Set-Top Boxes

* Ultrasound Imaging

* Video Digitizing Applications

* Single 3.0V Operation

* Excellent Dynamic Performance

* 59.5dB SNR at fIN = 20MHz

* 74dBc SFDR at fIN = 20MHz

* Low Power

* 19mA (Normal Operation)

* 5µA (Shutdown Mode)

* Fully Differential Analog Input

* Wide 2Vp-p Differential Input Voltage Range

* 400MHz -3dB Input Bandwidth

* On-Chip 2.048V Precision Bandgap Reference

* CMOS-Compatible Three-State Outputs

* 32-Pin TQFP Package

* Evaluation Kit Available