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
