The AD7858/AD7858L is a high-speed, low-power, 12-bit ADC that operates from a single 3 V or 5 V power supply, the AD7858 being optimized for speed and the AD7858L for low power consumption.
The AD7858 and AD7858L are high‑speed, low‑power 12‑bit analog‑to‑digital converters that operate from a single 3 V to 5.5 V supply. They feature eight single‑ended or four pseudo‑differential inputs, automatic power‑down after conversion, and built‑in system and self‑calibration for accurate operation over temperature and time.
The devices are offered in 24‑lead DIP, SOIC, and SSOP packages and provide a flexible serial interface (SPI, QSPI, 8051). Detailed timing specifications, pin configurations, and absolute maximum ratings are included for design integration.
| Supply Voltage (VDD) | 3 V to 5.5 V |
|---|---|
| Resolution | 12 bits |
| Maximum Sample Rate | 200 kSPS (AD7858) / 100 kSPS (AD7858L) |
| Power Consumption (3 V) | 12 mW (AD7858) / 4.5 mW (AD7858L) |
| Input Channels | Eight single‑ended or four pseudo‑differential |
| Package Types | 24‑lead DIP, SOIC, SSOP |
The AD7858 can sample at up to 200 kSPS, while the low‑power AD7858L supports up to 100 kSPS.
At 3 V, the AD7858 consumes about 12 mW, whereas the AD7858L uses about 4.5 mW.
The device supports eight single‑ended inputs or four pseudo‑differential input pairs.
It is available in 24‑lead DIP, SOIC, and SSOP packages.