AD7986 is a 18-bit, 2 MSPS PulSAR 15 mW ADC in LFCSP (QFN) package. AD7986 features 18-bit resolution with no missing codes, throughput of 2 MSPS (TURBO = high), 1.5 MSPS (TURBO = low), low power consumption, 15 mW at 2 MSPS, with external reference voltage, 26 mW at 2 MSPS with internal reference voltage.
The AD7986 is an 18‑bit successive‑approximation ADC capable of up to 2 MSPS in Turbo high mode. It offers low power dissipation (15 mW at 2 MSPS with internal reference), selectable internal or external voltage references, and a 1.8‑2.7 V digital‑interface supply. The device supports SPI, QSPI, Microwire and DSP‑compatible serial interfaces and can be daisy‑chained with a busy indicator.
Typical applications include battery‑powered equipment, data‑acquisition systems, medical instruments and seismic data acquisition. Layout guidelines recommend separating analog and digital sections, using ground planes, and placing decoupling capacitors close to the reference and power pins. An evaluation board (EVAL‑AD7986EB) is available for development.
| Resolution | 18 Bits |
|---|---|
| Maximum Throughput | 2 MSPS (Turbo high) |
| Input Voltage Range | ±VREF (differential) |
| Signal‑to‑Noise Ratio (internal reference) | 95.5 dB |
| Integral Non‑Linearity (typical) | ±1 LSB |
The AD7986 can sample up to 2 MSPS in Turbo high mode.
Yes, several AD7986s can be daisy‑chained on a single serial bus with an optional busy indicator.
It uses AVDD/DVDD = 2.5 V, BVDD = 5 V, and VIO selectable from 1.8 V to 2.7 V.