MAX1421:12位、40Msps、3.3V、低功耗ADC,内置电压基准

The MAX1421 is a 3.3V, 12-bit analog-to-digital converter (ADC), featuring 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 MAX1421 is optimized for low-power, high-dynamic performance applications in imaging and digital communications. The converter operates from a single 3.3V supply, consuming only 188mW while delivering a typical signal-to-noise ratio (SNR) of 66dB at an input frequency of 15MHz and a sampling frequency of 40Msps. 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 full-scale range of the ADC. A flexible reference structure accommodates an internal 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 MAX1421 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 typical 2mA supply current reduction. For idle periods, a full shutdown mode is available to maximize power savings. The MAX1421 provides parallel, offset binary, CMOS-compatible three-state outputs. The MAX1421 is available in a 7mm x 7mm, 48-pin TQFP package, and is specified over the commercial (0°C to +70°C) and the extended industrial (-40°C to +85°C) temperature ranges. Pin-compatible higher- and lower-speed versions of the MAX1421 are also available. Please refer to the MAX1420 data sheet for a frequency of 60Msps and the MAX1422 data sheet for a frequency of 20Msps.

关键特性
  • Single 3.3V Power Supply
  • 67dB SNR at fIN = 5MHz
  • 66dB SNR at fIN = 15MHz
  • Internal, 2.048V Precision Bandgap Reference
  • Differential, Wideband Input T/H Amplifier
  • Power-Down Modes
    • 180mW (Reference Shutdown Mode)
    • 10µW (Shutdown Mode)
  • Space-Saving 48-Pin TQFP Package
MAX1421:功能框图
MAX1421:功能框图
应用
  • 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
数据手册DataSheet
语言下载文件备注
英文MAX1421.pdfRev 1; 06/2006
关键参数
Part NumberInput Chan.Resolution
(bits)
Sample Rate
(Msps)
AC Specs
(MHz)
SFDR
(dBc)
ENOB
(bits)
SINAD
(dB)
SNR
(dB)
THD
(dB)
DNL
(±LSB)
INL
(±LSB)
Full Pwr. BW
(MHz)
ICC
(mA)
Data Bus InterfacePackage/PinsBudgetary
Price
max ≥@ fINminminmintypSee Notes
MAX142111240157010.363.566-691215057.5µP/12LQFP/48$6.94 @1k
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1421CCM+D停止供货LQFP;48引脚-40°C至+85°C参考数据资料
MAX1421CCM+TD停止供货LQFP;-40°C至+85°C参考数据资料
MAX1421CCM-D停止供货LQFP;-40°C至+85°C参考数据资料
MAX1421CCM-TD停止供货LQFP;-40°C至+85°C参考数据资料
MAX1421ECM+D生产中LQFP,;48引脚;82.8mm²-40°C至+85°CRoHS/无铅:无铅
MAX1421ECM+TD生产中LQFP,;48引脚;82.8mm²-40°C至+85°CRoHS/无铅:无铅
MAX1421ECM-D停止供货MAX1421ECM+LQFP,;48引脚;82.8mm²-40°C至+85°CRoHS/无铅:否
MAX1421ECM-TD停止供货MAX1421ECM+LQFP;48引脚-40°C至+85°C参考数据资料
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