The ADC08231, ADC08234 and ADC08238 are 8-bit successive approximation A/D converters with serial I/O and configurable input multiplexers with up to 8 channels. The serial I/O is configured to comply with the NSC MICROWIRETM serial data exchange standard for easy interface to the COPSTM family of controllers, and can easily interface with standard shift registers or microprocessors. Designed for high-speed, low-power applications, the devices are capable of a fast 2 ms conversion when used with a 4 MHz clock. All three devices provide a 2.5V band-gap derived reference with guaranteed performance over temperature. A track-hold function allows the analog voltage at the positive input to vary during the actual A/D conversion. The analog inputs can be configured to operate in various combinations of single-ended, differential, or pseudo-differential modes. In addition, input voltage spans as small as 1V can be accommodated.
The ADC08231/ADC08234/ADC08238 are 8‑bit successive‑approximation A/D converters with serial I/O, configurable 4‑ or 8‑channel multiplexers, an on‑chip 2.5 V band‑gap reference, and a track/hold function. They operate with a 4 MHz clock to achieve a 2 ms conversion time and are designed for high‑speed, low‑power applications.
Typical applications include high‑speed data acquisition, automotive sensor digitizing, process control, remote sensing, disk drives, portable instrumentation, and test systems. Key specifications such as resolution, conversion time, power dissipation, and supply voltage are listed in the electrical characteristics section, and multiple package options are provided for various board‑level designs.
| Resolution | 8 Bits |
|---|---|
| Conversion time (max) | 2 ms |
| Power dissipation (max) | 20 mW |
| Supply voltage | 5 V DC |
| Reference voltage | 2.5 V band‑gap |
| Analog input range | 0 V to 5 V |
The devices achieve a maximum conversion time of 2 ms when operated with a 4 MHz clock.
They require a single 5 V DC supply (operating range 4.5 V to 6.3 V).
Each converter includes an on‑chip 2.5 V band‑gap reference.