ADC08832 - 8-Bit Serial I/O CMOS A/D Converters with Multiplexer and Sample/Hold Function

The ADC08831/ADC08832 are 8-bit successive approximation Analog to Digital converters with 3-wire serial interfaces and a configurable input multiplexer for 2 channels. The serial I/O will interface to COPSfamily of micro-controllers, PLD's, microprocessors, DSP's, or shift registers. The serial I/O is configured to comply with the MICROWIRE serial data exchange standard.

To minimize total power consumption, the ADC08831/ADC08832 automatically go into low power mode whenever they are not performing conversions.

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. The voltage reference input can be adjusted to allow encoding of small analog voltage spans to the full 8-bits of resolution.

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• 3-Wire Serial Digital Data Link Requires Few I/O Pins
• Analog Input Track/Hold Function
• 2-Channel Input Multiplexer Option with Address Logic
• Analog Input Voltage Range from GND to V_CC
• No Zero or Full Scale Adjustment Required
• TTL/CMOS Input/Output Compatible
• Superior Pin Compatible Replacement for ADC0831/2

Key Specifications

• Resolution: 8 Bits
• Conversion Time (f_C = 2 MHz): 4μs (Max)
• Power Dissipation: 8.5mW (Typ)
• Low Power Mode: 3.0mW (Typ)
• Single Supply: 5V_DC
• Total Unadjusted Error: ±1LSB
• No Missing Codes over Temperature

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