ADC08234

Features:

Serial digital data link requires few I/O pins
Analog input track/hold function
4- or 8-channel input multiplexer options with address logic
On-chip 2.5V band-gap reference (g2% over temperature guaranteed)
No zero or full scale adjustment required
TTL/CMOS input/output compatible
0V to 5V analog input range with single 5V power supply
Pin compatible with Industry-Standards ADC0831/4/8


Application

High-speed data acquisition
Digitizing automotive sensors
Process control/monitoring
Remote sensing in noisy environments
Disk drives
Portable instrumentation
Test systems


Pinout




Specifications

Supply Voltage (V^_CC)                                                              6.5V
Voltage at Inputs and Outputs                       -0.3V to V_CC + 0.3V
Power Dissipation at TA e 25§C (Note 5)                         800 mW
ESD Susceptibility (Note 6)                                                  1500V




Description

The ADC08231/ADC08234/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 ADC08231/ADC08234/ADC08238 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.