The AD7829-1 is a high-speed, 8-channel, microprocessor-compatible, 8-bit analog-to-digital converter with a maximum throughput of 2 MSPS. The AD7829-1 contains an on-chip reference (2.5 V), automatic power-down at the end of conversion, and wide operating supply range (3 V ± 10% and 5 V ± 10%).
The AD7829-1 is a high‑speed 8‑channel, microprocessor‑compatible 8‑bit analog‑to‑digital converter. It features a 420 ns conversion time, on‑chip 2.5 V reference, track‑and‑hold amplifier, and a flexible parallel interface that supports stand‑alone operation via an EOC pulse. The device operates from a single 3 V ± 10 % or 5 V ± 10 % supply and includes an automatic power‑down function on the CONVST pin.
Typical applications include data‑acquisition systems, DSP front ends, disk drives, and mobile communication subsampling. The parallel interface allows easy mapping into microprocessor address space, and the part can be interfaced to a variety of microcontrollers such as 8051, PIC16C6x/7x, and ADSP‑21xx families.
| Conversion time | 420 ns max |
|---|---|
| Maximum throughput | 2 MSPS |
| Resolution | 8 bits |
| Number of analog input channels | 8 |
| Supply voltage range | 3 V ± 10 % to 5 V ± 10 % |
| On‑chip reference voltage | 2.5 V (±2 %) |
| Power‑down current | 5 µA max |
| Normal operation current | 12 mA max |
| Signal‑to‑Noise‑and‑Distortion Ratio | 148 dB min |
The maximum conversion time is 420 ns.
After a conversion, the CONVST pin is sampled; if it is low, the ADC powers down automatically.
It can operate from a single 3 V ± 10 % or 5 V ± 10 % supply.
The device provides eight single‑ended analog input channels.