The AD7811/AD7812 are high performance, low power, 10-bit A/D converters with a maximum sampling rate of 350 kSPS and a power supply range of 2.7V to 5.5V. The devices feature 10-bit resolution, 2.3us conversion time, and can be configured as four single-ended inputs, three pseudo-differential inputs, or two independent pseudo-differential channels. Additionally, the AD7811/AD7812 include on-board track and hold circuitry, a 2.5V±2.5% reference voltage, and support a DSP/microcontroller-compatible serial interface.
The AD7811 (four single‑ended inputs) and AD7812 (eight single‑ended inputs) are high‑speed 10‑bit analog‑to‑digital converters that operate from a single 2.7 V to 5.5 V supply and typically consume only 10 mW. They feature an onboard 2.5 V reference, track‑and‑hold circuitry, and automatic power‑down modes to reduce consumption at lower throughput rates.
Both devices are offered in 16‑lead (AD7811) and 20‑lead (AD7812) packages: plastic DIP, SOIC, and TSSOP. The serial interface is compatible with most DSPs and microcontrollers, and a package‑address pin allows two devices to share the same bus in multipackage applications. Control registers provide software conversion start, power‑down control, and channel configuration as single‑ended or pseudo‑differential.
| Resolution | 10 Bits |
|---|---|
| Maximum Sampling Rate | 350 kSPS |
| Supply Voltage Range | 2.7 V to 5.5 V |
| On‑chip Reference | 2.5 V ±2.5% |
| Conversion Time | 2.3 µs max |
| Power Dissipation (normal operation) | 10.5 mW max |
| Full Power‑Down Current | 1 µA max |
| Input Voltage Range | 0 V to Vpp |
Both devices can sample at up to 350 kSPS.
They operate from a single supply of 2.7 V to 5.5 V.
Normal operation power dissipation is up to 10.5 mW.
Yes, they support automatic power‑down as well as full and partial power‑down modes.