SP8542BN

® SP8542/SP8544 Two and Four Channel 12-Bit Multiplexed Sampling ADCs s s s s s s s s Two or Four Channel Input Mux 12 Bit Resolution Single +5Volt Supply Internal 1.25 Volt Reference Unipolar 0 to +2.5 Volt Input Range Fast, 3.75 µs Conversion Time per Channel Fast Power Shutdown/Turn-On Mode 3-Wire Synchronous Serial High Speed Interface s 2µA Shutdown Mode (10µW) s Low Power CMOS 42mW typical DESCRIPTION The SP8542 (2 channel) and SP8544 (4 channel) are 12-Bit serial in/out data acquisition systems with a bi-directional serial interface. The devices contain a high speed 12-Bit analog to digital converter, internal reference, and a 2 or 4 channel input mux which drives the internal sample/ hold circuitry. The SP8542 is available in 16-pin PDIP and SOIC packages, and the SP8544 is available in 18-pin PDIP and SOIC packages, specified over Commercial and Industrial temperature ranges. CONTROL LOGIC MUX Register CS SCLK DIN CH0 CH1 *CH2 *CH3 COUNTER STATUS SAR MUX CDAC OFFSET ADJUST SHUTDOWN RTRIM BUFFER REF. LATCHED COMPARATOR DOUT GAIN ADJUST REF OUT SP8542 - 2 CHANNEL MUX *SP8544 - 4 CHANNEL MUX SP8542/8544DS/01 SP8542/8544 Two and Four Channel 12-Bit Multiplexed Sampling ADC's © Copyright 2000 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS (TA=+25˚C unless otherwise noted) .............................................. VDD to DGND ............................................................. -0.3V to +7V VDA to AGND .............................................