The AD7674 is a 18-bit, 2.5 LSB INL, 800 kSPS SAR ADC that provides high speed 800 kSPS sampling and up to 103 dB of dynamic range in a single 5 V supply operation. The AD7674 also features a pin-to-pin compatible upgrade of AD7676, AD7678, and AD7679 for applications requiring 18-bit resolution and 800 kSPS sampling.
The AD7674 is an 18‑bit, charge‑redistribution SAR analog‑to‑digital converter that operates from a single 5 V supply. It provides high‑speed conversion rates up to 800 kSPS in Warp mode and supports both parallel (18‑, 16‑, or 8‑bit) and 3‑wire serial interfaces compatible with SPI, QSPI, Microwire, and DSP protocols.
Key features include a maximum integral non‑linearity of ±2.5 LSB, dynamic range of 103 dB, low power dissipation (98 mW typ at 800 kSPS), and operation over a temperature range of –40 °C to +85 °C. The device is offered in 48‑lead LQFP or LFCSP packages and includes an on‑board reference buffer.
| Resolution | 18 Bits |
|---|---|
| Maximum Throughput (Warp mode) | 800 kSPS |
| Integral Non‑Linearity (INL) | ±2.5 LSB |
| Power Dissipation @ 800 kSPS | 98 mW typ |
| Operating Temperature Range | –40 °C to +85 °C |
| Supply Voltage (AVDD/DVDD) | 5 V (4.75 V – 5.25 V) |
The AD7674 can achieve up to 800 kSPS in Warp mode.
Typical power dissipation is 98 mW at 800 kSPS.
It is offered in a 48‑lead LQFP (ST‑48) and a 48‑lead LFCSP (CP‑48) package.