MAX1112

19-1231; Rev 1; 10/98 KIT ATION EVALU E L B A AVAIL +5V, Low-Power, Multi-Channel, Serial 8-Bit ADCs General Description ____________________________Features o +4.5V to +5.5V Single Supply o Low Power: 135µA at 50ksps 13µA at 1ksps o 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1112) o 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1113) o Internal Track/Hold; 50kHz Sampling Rate o Internal 4.096V Reference o SPI/QSPI/MICROWIRE-Compatible Serial Interface o Software-Configurable Unipolar or Bipolar Inputs o Total Unadjusted Error: ±1LSB (max) ±0.3LSB (typ) MAX1112/MAX1113 The MAX1112/MAX1113 are low-power, 8-bit, 8-channel analog-to-digital converters (ADCs) that feature an internal track/hold, voltage reference, clock, and serial interface. They operate from a single +4.5V to +5.5V supply and consume only 135µA while sampling at rates up to 50ksps. The MAX1112’s 8 analog inputs and the MAX1113’s 4 analog inputs are software-configurable, allowing unipolar/bipolar and singleended/differential operation. Successive-approximation conversions are performed using either the internal clock or an external serial-interface clock. The full-scale analog input range is determined by the 4.096V internal reference, or by an externally applied reference ranging from 1V to V DD. The 4-wire serial interface is compatible with the SPI™, QSPI™, and MICROWIRE™ serial-interface standards. A serial-strobe output provides the end-of-conversion signal for interrupt-...