AD7898 is a fast 12-bit, 220 kSPS ADC that operates from a single 5V supply and is housed in a small 8-lead SOIC package.
The AD7898 ADC provides 12‑bit resolution with a maximum throughput of 220 kSPS. It operates from a single 5 V supply and offers two input‑range options: +10 V (AD7898‑10) and +2.5 V (AD7898‑3). The device includes an on‑chip track/hold amplifier, a flexible three‑wire serial interface, and a power‑down mode for portable applications.
The datasheet details electrical specifications, timing parameters, absolute maximum ratings, pin functions, and ordering information. It also includes performance graphs such as SINAD, PSRR, and effective number of bits versus input frequency.
| Resolution | 12 Bits |
|---|---|
| Maximum Throughput Rate | 220 kSPS |
| Supply Voltage | 5 V (single‑supply) |
| Power Dissipation | 22.5 mW max |
| Input Voltage Range (AD7898‑10) | +10 V |
| Input Voltage Range (AD7898‑3) | +2.5 V |
| Reference Input Voltage | 2.5 V ±5 % |
The AD7898 operates from a single 5 V supply (5 V ± 5 %).
The device can convert at up to 220 kSPS in both Mode 0 and Mode 1.