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AD7690 - Differential ADC

Description

The AD76901 is an 18-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power supply, VDD.

It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port.

Features

  • 18-bit resolution with no missing codes Throughput: 400 kSPS INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR) Dynamic range: 102 dB at 400 kSPS Oversampled dynamic range: 125 dB at 1 kSPS Noise-free code resolution: 20 bits at 1 kSPS Effective resolution: 22.7 bits at 1 kSPS SINAD: 101.5 dB at 1 kHz THD:.
  • 125 dB at 1 kHz True differential analog input range: ±VREF 0 V to VREF with VREF up to VDD on both inputs No pipeline delay Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V.

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Full PDF Text Transcription

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Data Sheet 18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/LFCSP AD7690 FEATURES 18-bit resolution with no missing codes Throughput: 400 kSPS INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR) Dynamic range: 102 dB at 400 kSPS Oversampled dynamic range: 125 dB at 1 kSPS Noise-free code resolution: 20 bits at 1 kSPS Effective resolution: 22.7 bits at 1 kSPS SINAD: 101.5 dB at 1 kHz THD: −125 dB at 1 kHz True differential analog input range: ±VREF 0 V to VREF with VREF up to VDD on both inputs No pipeline delay Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface Proprietary serial interface SPI/QSPI/MICROWIRE™/DSP compatible Daisy-chain multiple ADCs and busy indicator Power dissipation 4.25 μW at 100 SPS 4.
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