AD7674 is an 18-bit, 2.5 LSB INL, 800 kSPS SAR ADC with the following features: 18-bit resolution, no missing codes, no pipeline delay, differential input range of ±VREF (VREF up to 5 V), throughput of 800 kSPS (Warp mode), 666 kSPS (Normal mode), 570 kSPS (Impulse mode), INL of ±2.5 LSB max (±9.5 ppm of full scale), dynamic range of 103 dB typ (VREF = 5 V), S/(N+D) of 100 dB typ @ 2 kHz (VREF = 5 V), parallel (18-, 16-, or 8-bit bus) and serial 5 V/3 V interface SPI®/QSPI™/MICROWIRE™/DSP compatible, on-board reference buffer, single 5 V supply operation, power dissipation of 98 mW typ @ 800 kSPS, 78 mW typ@ 500 kSPS (Impulse mode), 160 µW @ 1 kSPS (Impulse mode), 48-lead LQFP or 48-lead LFCSP package, pin-to-pin compatible upgrade of AD7676/AD7678/AD7679
The AD7674 is an 18‑bit, charge‑redistribution SAR analog‑to‑digital converter offering up to 800 kSPS throughput in Warp mode. It features a differential input range of ±5 V, no missing codes, and selectable parallel (8‑, 16‑, or 18‑bit) or 3‑wire serial interfaces compatible with 3 V and 5 V logic.
Available in 48‑lead LQFP or 48‑lead LFCSP packages, the device operates from –40 °C to +85 °C and consumes as little as 98 mW at 800 kSPS. Detailed specifications, timing diagrams, pin functions, and ordering information are provided throughout the document.
| Resolution | 18 bits |
|---|---|
| Maximum Throughput (Warp mode) | 800 kSPS |
| Power Dissipation @ 800 kSPS | 98 mW typ |
| Supply Voltage (AVDD) | 4.75‑5.25 V |
| Differential Input Range | ±5 V |
| Dynamic Range | 103 dB typ |
| Signal‑to‑Noise Ratio | 100 dB typ @ 2 kHz |
| Aperture Delay | 2 ns |
| Package Options | 48‑lead LQFP or 48‑lead LFCSP |
| Operating Temperature Range | -40 °C to +85 °C |
The AD7674 can sample at up to 800 kSPS in Warp mode.
It operates from a single 5 V supply, with AVDD specified as 4.75 V to 5.25 V.
The device is offered in a 48‑lead LQFP or a 48‑lead LFCSP package.
Typical power dissipation is 98 mW when operating at 800 kSPS.