AD7617BSTZ

1MSPS 16CH muxed dual 14B SAR ADC

Product Details

The AD7617 is a 14-bit, DAS that supports dual simultaneous sampling of 16 channels. The AD7617 operates from a single +5 V supply and can accommodate ±10 V, ±5 V, and ±2.5 V true bipolar input signals while sampling at throughput rates up to 1 MSPS per channel pair with 85 dB signal-to-noise ratio SNR. Higher SNR performance can be achieved with the on-chip oversampling mode 85.3 dB for an oversampling ratio OSR of 2.

The input clamp protection circuitry can tolerate voltages up to ±21 V. The AD7617 has 1 MΩ analog input impedance, regardless of sampling frequency. The single-supply operation, on-chip filtering, and high input impedance eliminate the need for driver op amps and external bipolar supplies.

The device contains analog input clamp protection, a dual, 14-bit charge redistribution successive approximation register SAR analog-to-digital converter ADC, a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces. The AD7617 is serial peripheral interface SPI/QSPI™/DSP/MICROWIRE compatible.

Applications

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Power line monitoring

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Protective relays

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Multiphase motor control

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Instrumentation and control systems

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Data acquisition systems DASs

 

### Features and Benefits

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16-channel, dual, simultaneously sampled inputs

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Independently selectable channel input ranges

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True bipolar: ±10 V, ±5 V, ±2.5 V

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Single 5 V analog supply and 2.3 V to 3.6 V VDRIVE supply

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Fully integrated data acquisition solution

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Analog input clamp protection

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Input buffer with 1 MΩ analog input impedance

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First-order antialiasing analog filter

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On-chip accurate reference and reference buffer

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Dual 14-bit SAR ADC

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Throughput rate: 2× 1 MSPS per channel pair

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Oversampling capability with digital filter

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Flexible sequencer with burst mode

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Flexible parallel/serial interface

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SPI/QSPI/MICROWIRE/DSP compatible

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Optional CRC error checking

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Hardware/software configuration

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Performance

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85.3 dB typical SNR at 500 kSPS 2× oversampling

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85 dB typical SNR at 1 MSPS

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−103 dB typical THD at ±10 V range

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±0.3 LSB INL typical, ±0.99 LSB DNL maximum

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8 kV ESD analog input pins only

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On-chip self detect function

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80-lead LQFP package