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265ksps、+3V、6/2通道、12位ADC,带有+2.5V电压基准及并行接口

尺寸最小的低功耗、并行输出、12位ADC

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主要特征

应用/用途

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主要特征

  • 12-Bit Resolution, ±0.5 LSB Linearity
  • +3V Single-Supply Operation
  • Internal +2.5V Reference
  • Software-Configurable Analog Input Multiplexer
    • 6-Channel Single-Ended/3-Channel Pseudo-Differential (MAX1295)
    • 2-Channel Single-Ended/1-Channel Pseudo-Differential (MAX1297)
  • Software-Configurable Unipolar/Bipolar Analog Inputs
  • Low Current
    • 1.9mA (265ksps)
    • 1.0mA (100ksps)
    • 400µA (10ksps)
    • 2µA (Shutdown)
  • Internal 3MHz Full-Power Bandwidth Track/Hold
  • Parallel 12-Bit Interface
  • Small Footprint
    • 28-Pin QSOP (MAX1295)
    • 24-Pin QSOP (MAX1297)

应用/用途

  • 数据采集系统
  • 数据记录
  • 能量管理
  • 工业控制系统
  • 病人监护
  • 触摸屏

描述

The MAX1295/MAX1297 low-power, 12-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed 12-bit parallel interface. They operate with a single +2.7V to +3.6V analog supply.

Power consumption is only 5.4mW at the maximum sampling rate of 265ksps. Two software-selectable power-down modes enable the MAX1295/MAX1297 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can reduce supply current below 10µA at lower sampling rates.

Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1295 has six input channels and the MAX1297 has two (three input channels and one input channel, respectively, when in pseudo-differential mode).

Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications or for other circuits with demanding power-consumption and space requirements.

The MAX1295/MAX1297 tri-states active-low INT when active-low CS goes high. Refer to MAX1265/MAX1267 if tri-stating active-low INT is not desired.

The MAX1295 is offered in a 28-pin QSOP package, while the MAX1297 comes in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1294/MAX1296 data sheet.

简化框图

 

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心