This document describes the features and characteristics of the 18-bit, 2.5 LSB INL, 100 kSPS SAR ADC AD7678, including resolution, input range, throughput, dynamic range, etc.
The AD7678 is an 18‑bit charge‑redistribution SAR analog‑to‑digital converter that operates from a single 5 V supply. It offers differential input ranges up to 5 V, a maximum throughput of 100 kSPS, and low power dissipation (18 mW at full speed). The device supports versatile serial (SPI, QSPI, Microwire) and parallel (8‑, 16‑, or 18‑bit) interfaces, making it suitable for high‑speed data acquisition and instrumentation applications.
The datasheet provides detailed specifications, timing diagrams, pin configurations, absolute maximum ratings, and application hints. It also includes performance characteristics such as dynamic range (103 dB typ), SNR (100 dB typ @ 2 kHz), and power‑supply sensitivity, along with mechanical dimensions and ordering information.
| Resolution | 18 Bits |
|---|---|
| Maximum Throughput | 100 kSPS |
| Power Dissipation @ 100 kSPS | 18 mW |
| Supply Voltage | Single 5 V |
| Dynamic Range | 103 dB typ |
| Signal‑to‑Noise Ratio | 100 dB typ @ 2 kHz |
The AD7678 provides 18‑bit resolution.
It can sample at up to 100 kSPS.
The device operates from a single 5 V supply.