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400ksps、+5V、8/4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

产品详情

主要特征

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 4
Conv. Rate (ksps) (max) 400
Data Bus µP/8
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 1
External VREF (V) (max) 5.5
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 1.25
INL (±LSB) 1
Package/Pins QSOP/24
Budgetary
Price (See Notes)
9.23
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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 4
Conv. Rate (ksps) (max) 400
Data Bus µP/8
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 1
External VREF (V) (max) 5.5
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 1.25
INL (±LSB) 1
Package/Pins QSOP/24
Budgetary
Price (See Notes)
9.23

主要特征

  • 12-Bit Resolution, ±0.5 LSB Linearity
  • +5V Single-Supply Operation
  • User-Adjustable Logic Level (+2.7V to +5.5V)
  • Internal +2.5V Reference
  • Software-Configurable Analog Input Multiplexer
    • 8-Channel Single-Ended/4-Channel Pseudo-Differential (MAX1290)
    • 4-Channel Single-Ended/2-Channel Pseudo-Differential (MAX1292)
  • Software-Configurable Unipolar/Bipolar Analog Inputs
  • Low Current:
    • 2.5mA (400ksps)
    • 1.0mA (100ksps)
    • 400µA (10ksps)
    • 2µA (Shutdown)
  • Internal 6MHz Full-Power Bandwidth Track/Hold
  • Byte-Wide Parallel (8 + 4) Interface
  • Small Footprint:
    • 28-Pin QSOP (MAX1290)
    • 24-Pin QSOP (MAX1292)

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 MAX1290/MAX1292 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, byte-wide parallel interface. The devices operate with a single +5V analog supply and feature a VLOGIC pin that allows them to interface directly with a +2.7V to +5.5V digital supply.

Power consumption is only 10mW (VDD = VLOGIC) at a 400ksps max sampling rate. Two software-selectable power-down modes enable the MAX1290/MAX1292 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can cut supply current to under 10µA at reduced sampling rates.

Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1290 has eight input channels and the MAX1292 has four input channels (four and two input channels, 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 MAX1290/MAX1292 tri-states active-low INT when active-low CS goes high. Refer to MAX1262/MAX1264 if tri-stating active-low INT is not desired.

The MAX1290 is available in a 28-pin QSOP package, while the MAX1292 comes in a 24-pin QSOP. For pin-compatible +3V, 12-bit versions, refer to the MAX1291/MAX1293 data sheet.

简化框图

MAX1290、MAX1292:典型工作电路 MAX1290、MAX1292:典型工作电路 Zoom icon

Technical Docs

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