Kevin Wrenner, Troy Seman and Mark Thoren ® Ω 1.0 5V 4 0.1µF 3 1.7k 1.7k I2C BUS CA0 5 6 VCC REF 8 REF_SEL 3 SDA LTC2631A VOUT 7 2 SCL -LM12 1 CA0 GND 4 – 5 LTC2054 + 2 0.5 10V 1 8 M9 9 M3 10 M1 1 P1 2 P3 3 P9 0.1µF 7 VCC LT1991 VEE 4 REF OUT 6 0 VOUT = ±5V –0.5 5 0.1µF –10V 08/08/448 ZERO SCALE = –5V FULL SCALE = 5V LSB = 2.44mV 0.1µF INL (LSB) 5V DN448 F01 –1.0 0 1024 2048 CODE 3072 4095 DN F02 5V 0.1µF 8 SERIAL BUS 5 6 VCC REF 0.1µF CLR 3 SDI LTC2640 VOUT 7 2 SCK -HZ12A 1 CS/LD GND 8 M9 9 M3 10 M1 1 P1 2 P3 3 P9 4 2.7V TO 5.5V 5V LT1790A-2.048 0.1µF 1, 2 0.1µF 7 VCC LT1991 REF VEE 4 OUT 0V 6 SERIAL BUS –1.0235V 5 0.1µF 4 –5V DN448 F03 6 1µF 5 6 3 SDI VCC REF 2 SCK LTC2640 VOUT 7 1 -LM12A CS/LD 0V 8 REF_SEL GND 4 2.0475V DN448 F04 5V 0.1µF 0.1µF VIN = 0V TO 5V 1k 6 IN+ 0.01µF 4 VCC LTC2453 1k 5 0.01µF 3 REF+ IN– SDA SCL 10k 10k 8 7 REF– GND GND 2 1 9 I2C BUS 5 6 VCC REF REF_SEL 3 SDA LTC2631 VOUT 7 2 SCL -HM12A 1 CA0 GND 4 8 VOUT = 0V TO 5V µP DN448 F05 LTC2631-LM LTC2631-LZ LTC2631-HM LTC2631-HZ LTC2640-LM LTC2640-LZ LTC2640-HM LTC2640-HZ I2C I2C I2C I2C SPI SPI SPI SPI 2.5V 2.5V 4.096V 4.096V 2.5V 2.5V 4.096V 4.096V dn448 0808 • PRINTED IN JAPAN LINEAR TECHNOLOGY CORPORATION 2008