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+2.375V、低功耗、8通道、串行12位ADC

可理想用于2.5V 12位系统

产品详情

主要特征

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 100
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.048
External VREF (V) (min) 1
External VREF (V) (max) 3.3
Unipolar VIN (V) (max) 2.048
Bipolar VIN (±V) (max) 1.024
INL (±LSB) 1
Package/Pins PDIP/20
SSOP/20
Budgetary
Price (See Notes)
14.95
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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 100
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.048
External VREF (V) (min) 1
External VREF (V) (max) 3.3
Unipolar VIN (V) (max) 2.048
Bipolar VIN (±V) (max) 1.024
INL (±LSB) 1
Package/Pins PDIP/20
SSOP/20
Budgetary
Price (See Notes)
14.95

主要特征

  • Single +2.375V to +3.3V Operation
  • 8-Channel Single-Ended or 4-Channel Differential Analog Inputs
  • Low Power:
    • 0.8mA (100ksps)
    • 10µA (1ksps)
    • 1µA (power-down mode)
  • Internal Track/Hold, 100kHz Sampling Rate
  • SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • 20-Pin DIP/SSOP Packages

应用/用途

  • 电池供电应用
  • 数据采集
  • 医疗仪器
  • 便携式数据记录

描述

The MAX1245 12-bit data-acquisition system combines an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and ultra-low power consumption. It operates from a single +2.375V to +3.3V supply, and its analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.

The 4-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. A serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1245 works with an external reference, and uses either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

This device provides a hard-wired active-low SHDN pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface powers up the MAX1245, and the quick turn-on time allows it to be shut down between conversions. This technique can cut supply current to under 10µA at reduced sampling rates.

The MAX1245 is available in a 20-pin DIP package and an SSOP that occupies 30% less area than an 8-pin DIP. For supply voltages from +2.7V to +5.25V, use the pin-compatible MAX147.

简化框图

MAX1245:典型工作电路 MAX1245:典型工作电路 Zoom icon

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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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