10-Bit, 60Msps, 3.0V, Low-Power ADC with Internal Reference

 

Part Number	Replacement	Explanation

Description

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The MAX1446 10-bit, 3V analog-to-digital converter (ADC) features a fully differential input, a pipelined 10-stage ADC architecture with digital error correction and wideband track and hold (T/H) incorporating a fully differential signal path. This ADC is optimized for low-power, high dynamic performance applications in imaging and digital communications. The MAX1446 operates from a single 2.7V to 3.6V supply, consuming only 90mW 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 MAX1446 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.

Lower and higher speed, pin-compatible versions of the MAX1446 are also available. Refer to the MAX1444 data sheet for a 40Msps version, the MAX1448 datasheet for an 80Msps version, and the MAX1449 datasheet for a 105Msps version.

The MAX1446 has parallel, offset binary, three-state outputs that can be operated from 1.7V to 3.3V 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) and automotive (-40°C to+105°C) temperature ranges.

MAX1446: Functional Diagram Enlarge+

Key Features

• Single 3.0V Operation
• Excellent Dynamic Performance
  • 59.5dB SNR at f_IN = 20MHz
  • 73dB SFDR at f_IN = 20MHz
• Low Power:
  • 30mA (Normal Operation)
  • 5µA (Shutdown Mode)
• Fully Differential Analog Input
• Wide 2V_P-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 (MAX1448 EV Kit)

Applications/Uses

• Baseband and IF Digitization
• CCD Imaging
• Digital Set-Top Boxes
• Ultrasound Imaging
• Video Digitizing Applications