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12位、20Msps、+3.3V、低功耗ADC,内置电压基准

产品详情

主要特征

Parametric specs for High-Speed ADCs (> 5Msps)
Resolution (bits) 12
# Input Channels 1
Sample Rate (Msps) (max) 20
Data Bus Interface µP/12
AC Specs (MHz) (@ fIN) 15
SFDR (dBc) (min) 74
ENOB (bits) (min) 10.5
SINAD (dB) 65
SNR (dB) 67
THD (dB) -72
DNL (±LSB) 1
INL (±LSB) 2
Package/Pins LQFP/48
Budgetary
Price (See Notes)
7.4
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参量

Parametric specs for High-Speed ADCs (> 5Msps)
Resolution (bits) 12
# Input Channels 1
Sample Rate (Msps) (max) 20
Data Bus Interface µP/12
AC Specs (MHz) (@ fIN) 15
SFDR (dBc) (min) 74
ENOB (bits) (min) 10.5
SINAD (dB) 65
SNR (dB) 67
THD (dB) -72
DNL (±LSB) 1
INL (±LSB) 2
Package/Pins LQFP/48
Budgetary
Price (See Notes)
7.4

主要特征

  • 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 Shutdown Mode)
    • 10µW (Shutdown Mode)
  • Space-Saving 48-Pin TQFP Package

应用/用途

  • CCD像素处理
  • 数据采集
  • 中频与基带数字化
  • 医疗超声成像
  • 雷达

描述

The MAX1422 3.3V, 12-bit analog-to-digital converter (ADC) features a fully differential input, pipelined, 12- stage 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, CMOS-compatible three-state outputs.

The MAX1422 is available in a 7mm x 7mm x 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.

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Technical Docs

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在Maxim的知识库中搜索技术问题的答案

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