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高速、8通道、8位同时采样/保持ADC,带有电压基准

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主要特征

应用/用途

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 8
Conv. Rate (ksps) (max) 250
Data Bus µP/8
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.5
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 2.5
INL (±LSB) 0.5
Package/Pins SOIC (W)/28
Budgetary
Price (See Notes)
11.18
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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 8
Conv. Rate (ksps) (max) 250
Data Bus µP/8
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.5
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 2.5
INL (±LSB) 0.5
Package/Pins SOIC (W)/28
Budgetary
Price (See Notes)
11.18

主要特征

  • 8 Simultaneously Sampling Track/Hold Inputs
  • 3.6µs Conversion Time Per Channel
  • Unipolar or Bipolar Input Range
  • Single-Ended or Differential Inputs
  • Mixed Input Configurations Possible
  • 2.5V Internal Reference
  • Single +5V or Dual ±5V Supply Operation

应用/用途

  • AC Power Meters
  • DSP Analog Input
  • Phase-Sensitive Data Acquisition
  • Portable Data Loggers
  • Vibration and Waveform Analysis

描述

The MAX155/MAX156 are high-speed, 8-bit, multichannel analog-to-digital converters (ADCs) with simultaneous track/holds (T/Hs) to eliminate timing differences between input channel samples. The MAX155 has 8 analog input channels and the MAX156 has 4 analog input channels. Each channel has its own T/H, and all T/Hs sample at the same instant. The ADC converts a channel in 3.6µs and stores the result in an internal 8x8 RAM. The MAX155/MAX156 also feature a 2.5V internal reference and power-down capability, providing a complete, sampling data-acquisition system.

When operating from a single +5V supply, the MAX155/MAX156 perform either unipolar or bipolar, single-ended or differential conversions. For applications requiring wider dynamic range or bipolar conversions around ground, the VSS supply pin may be connected to -5V.

Conversions are initiated with a pulse to the active-low WR pin, and data is accessed from the ADC’s RAM with a pulse to the active-low RD pin. A bidirectional interface updates the channel configuration and provides output data. The ADC may also be wired for output-only operation.The MAX155 comes in 28-pin PDIP and wide SO packages, and the MAX156 comes in 24-pin narrow PDIP and 28-pin wide SO packages.

简化框图

MAX155:引脚配置 MAX155:引脚配置 Zoom icon

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