SAR ADC

MS51588

  • New design recommended
16bit, 8 channel, 500kSPS, SAR ADC
Overview

MS51588N is an 8-channel, 16bit, charge redistribution successive approximation analog-to-digital converter, using a single power supply.

The MS51588N has all the components required for a multichannel, low-power data acquisition system, including: a true 16-bit SAR ADC with no code loss; An 8-channel low-crosstalk multiplexer for configuring inputs as single-ended inputs (with or without reference ground), differential inputs, or bipolar inputs; Reference source buffers; Temperature sensor; Optional monopole filter; And a sequencer that is very useful for multi-channel sequential sampling.

MS51588N uses a simple SPI interface to write configuration registers and read conversion results. The SPI interface uses a separate power supply (VIO), which is set to the host logic level. Power consumption is proportional to the conversion rate.

The MS51588N comes in a small QFN20 package and operates from -40°C to +125°C.

Key Features
  • • 16-bit lossless resolution
  • • Integrated multiplexer: 8-way selectable input configuration
  • • Unipolar and bipolar inputs, single-ended and differential inputs
  • INL: ±0.5LSB (typical), ±1.5LSB (maximum)
  • • Dynamic range: 92dB
  • • SINAD: 92dB(20kHz)
  • • Analog input range: 0 to VREF (VREF up to VDD)
  • • Internal temperature sensor
  • • Channel sequencer
  • • Single supply operation: 4.5V to 5.5V,
  • Logic power supply: 1.8V to VDD
  • • Serial interface: compatible with SPI, MICROWIRE,
  • QSPI and DSP
  • • Power consumption: 7.5mW(5V@100kSPS),
  • 23mW(5V@500kSPS)
  • • Standby current: 200nA@5V
Key Features
Multi-channel system monitoring
Battery powered devices
Medical devices: ECG, EKG
Mobile communications: GPS
Power line monitoring
Data acquisition
Seismic data acquisition system
Instrumentation
Process Control