The AD7858/AD7858L are high-speed, low-power, 12-bit ADCs that operate from a single 3 V or 5 V power supply, the AD7858 being optimized for speed and the AD7858L for power.
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. The AD7858 is optimized for speed (200 kSPS) while the AD785L version targets low power consumption.
The device offers eight single‑ended or four pseudo‑differential inputs, flexible serial interfaces (SPI, QSPI, 8051), automatic self‑calibration on power‑up, and multiple power‑down modes. It is available in 24‑lead DIP, SOIC, and SSOP packages.
| Supply Voltage | 3 V to 5.5 V |
|---|---|
| Sampling Rate (AD7858) | 200 kSPS |
| Sampling Rate (AD7858L) | 100 kSPS |
| Resolution | 12 bits |
| Power Consumption (AD7858) | 12 mW (VDD = 3 V) |
| Power Consumption (AD7858L) | 4.5 mW (VDD = 3 V) |
| Input Channels | 8 single‑ended or 4 pseudo‑differential |
| Package Options | 24‑lead DIP, SOIC, SSOP |
The AD7858 can sample at up to 200 kSPS.
The AD7858L is the low‑power version of the ADC.
It supports automatic power‑down after conversion, full power‑down, and partial power‑down via control register bits.