The AD7859/AD7859L are high performance, low power single supply, 8-channel, 12-bit analog-to-digital converters (ADCs) suitable for portable applications such as personal digital assistants, medical instruments, and mobile communications.
The AD7859 and AD7859L are high‑speed, low‑power, 8‑channel, 12‑bit analog‑to‑digital converters that operate from a single 3 V to 5 V supply. The AD7859 is optimized for up to 200 kSPS throughput, while the AD7859L targets low‑power operation at up to 100 kSPS. Both devices include self‑calibration, system calibration, and flexible power‑down options.
The datasheet provides detailed electrical specifications, timing diagrams, pin‑out information for PQFP and PLCC packages, and absolute maximum ratings. It also describes the on‑chip registers, conversion timing, and recommended external components such as reference capacitors.
| Supply Voltage (AVDD/DVDD) | 3.0 V to 5.5 V |
|---|---|
| Resolution | 12 bits |
| Number of Channels | 8 |
| Maximum Throughput Rate | 200 kSPS (AD7859) / 100 kSPS (AD7859L) |
| Typical Power Consumption (Normal Mode) | 15 mW (AD7859) / 5.5 mW (AD7859L) |
| Input Voltage Range (Unipolar) | 0 V to VREF |
The AD7859 can convert at up to 200 kSPS, while the low‑power AD7859L can convert at up to 100 kSPS.
Typical normal‑mode power consumption is 15 mW for the AD7859 and 5.5 mW for the AD7859L.
Both analog and digital supplies may be between 3.0 V and 5.5 V.