The MAX132 is a CMOS, 18-bit plus sign, serial-output, analog-to-digital converter (ADC). Multi-slope integra- tion provides high-resolution conversions in less time than standard integrating ADCs, allowing operation up to 100 conversions per second. Low conversion noise provides guaranteed operation with ±512mV full-scale input range (2µV/LSB). A simple 4-wire serial interface connects easily to all common microprocessors, and twos-complement output coding simplifies bipolar mea- surements. Typical supply current is only 60µA and is reduced to 1µA in sleep mode. Four serially pro- grammed digital outputs can be used to control an external multiplexer or programmable-gain amplifier. The MAX132 comes in 24-pin narrow DIP and wide SO packages, and is available in commercial and extend- ed temperature grades. High resolution, compact size, and low power make this device ideal for data loggers, weigh scales, data-acqui- sition systems, and panel meters.