The AD7688 is a 16-bit, 1.5 LSB INL, 500 kSPS PulSAR differential ADC. It features 16-bit resolution, 500 kSPS throughput, ±0.4 LSB INL, 96.5 dB dynamic range, 95.5 dB SNR, -118 dB THD, true differential analog input range, single-supply 5V operation, multiple logic interface options, daisy-chaining of multiple ADCs, and low power dissipation.
The AD7688 is a 16‑bit PulSAR ADC offering up to 500 kSPS conversion rate, true differential inputs, and a single‑supply 5 V operation. It features low power consumption, no missing codes, and a versatile serial interface that supports SPI, QSPI, Microwire and daisy‑chaining.
The document provides full electrical specifications, absolute maximum ratings, pin‑out diagrams for MSOP and QFN packages, timing parameters, and application hints for battery‑powered equipment, data acquisition and instrumentation. Ordering information and mechanical dimensions are also included.
| Resolution | 16 bits |
|---|---|
| Throughput | 500 kSPS |
| Integral Nonlinearity (INL) | 0.4 LSB typ, +1.5 LSB max |
| Dynamic Range | 96.5 dB |
| Power Dissipation (100 kSPS) | 3.75 mW @ 5 V |
| Standby Current | 1 nA |
| Supply Voltage (VDD) | 4.5 V to 5.5 V |
| Digital Interface Logic Levels | Compatible with 1.8 V, 2.5 V, 3 V, or 5 V |
The AD7688 provides a 16‑bit resolution with no missing codes.
The ADC can sample at up to 500 kSPS.
The device operates from a VDD of 4.5 V to 5.5 V, with VIO ranging from 2.3 V to VDD.