The AD7899 is a fast, low-power, 14-bit A/D converter that operates from a single 5 V supply. The part contains a 2.2 µs successive-approximation ADC, a track/hold amplifier, 2.5 V reference, on-chip clock oscillator, signal conditioning circuitry, and a high-speed parallel interface.
The AD7899 is a fast, low‑power 14‑bit analog‑to‑digital converter that operates from a single 5 V supply. It provides a 2.2 µs conversion time, 0.3 µs track/hold acquisition, and up to 400 kSPS throughput. The device includes over‑voltage protection, a high‑speed parallel interface that can run at 3 V or 5 V, and power‑saving standby mode.
Three versions are offered: AD7899‑1 with ±10 V or ±5 V ranges, AD7899‑2 with 0‑2.5 V or 0‑5 V unipolar ranges, and AD7899‑3 with a +2.5 V range. The part is available in 28‑lead SOIC and SSOP packages and meets commercial temperature specifications of –40 °C to +85 °C.
| Resolution | 14‑bit |
|---|---|
| Maximum Throughput | 400 kSPS |
| Power Consumption (Normal Mode) | 80 mW typ |
| Power‑Saving Mode | 20 pW typ |
| Input Voltage Ranges | +10 V, +5 V, +2.5 V, 0‑5 V, 0‑2.5 V |
| Overvoltage Protection | Up to +18 V on analog inputs |
The device can sample up to 400 kSPS.
Typical power consumption is 80 mW.
It supports +10 V, +5 V, +2.5 V, 0‑5 V and 0‑2.5 V ranges depending on the version.