ADC08131 General Description
The ADC08131/ADC08134/ADC08138 are 8-bit successive approximation A/D converters with serial I/O and config- urable input multiplexers with up to 8 channels. The serial I/O is configured to comply with the NSC MICROWIRE™ serial data exchange standard for easy interface to the COPS™ family of controllers, and can easily interface with standard shift registers or microprocessors. 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.
ADC08131 Maximum Ratings
Supply Voltage (VCC) 6.5V
Voltage at Inputs and Outputs −0.3V to VCC + 0.3V
Input Current at Any Pin (Note 4) ±5mA
Package Input Current (Note 4) ±20 mA
Power Dissipation at TA = 25˚C
(Note 5) 800 mW
ESD Susceptibility (Note 6) 1500V
ADC08131 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 (±2% 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
ADC08131 Typical Application
Digitizing automotive sensors
Process control/monitoring
Remote sensing in noisy environments
Embedded diagnostics
ADC08131 Connection Diagram
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