LTC1096/LTC1096L LTC1098/LTC1098L Micropower Sampling 8-Bit Serial I/O A/D Converters FEATURESDESCRIPTION n 80μA Maximum Supply Current The LTC®1096/LTC1096L/LTC1098/LTC1098L are n 1nA Typical Supply Current in Shutdown micropower, 8-bit A/D converters that draw only 80μA of n 5V Operation (LTC1096/LTC1098) supply current when converting. They automatically power n 3V Operation (LTC1096L/LTC1098L)(2.65V Min) down to 1nA typical supply current whenever they are not n Sample-and-Hold performing conversions. They are packaged in 8-pin SO n 16μs Conversion Time packages and have both 3V (L) and 5V versions. These n 33kHz Sample Rate 8-bit, switched-capacitor, successive approximation ADCs n ±0.5LSB Total Unadjusted Error Over Temp include sample-and-hold. The LTC1096/LTC1096L have a n Direct 3-Wire Interface to Most MPU Serial Ports and single differential analog input. The LTC1098/LTC1098L All MPU Parallel I/O Ports offer a software selectable 2-channel MUX. n 8-Pin SO Plastic Package On-chip serial ports allow effi cient data transfer to a wide range of microprocessors and microcontrollers over three APPLICATIONS wires. This, coupled with micropower consumption, makes remote location possible and facilitates transmitting data n Battery-Operated Systems through isolation barriers. n Remote Data Acquisition n Battery Monitoring These circuits can be used in ratiometric applications or n Battery Gas Gauges with an external reference. The high impedance analog n Temperature Measurement inputs and the ability to operate with reduced spans (be- n Isolated Data Acquisition low 1V full scale) allow direct connection to sensors and L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. transducers in many applications, eliminating the need All other trademarks are the property of their respective owners. for gain stages. TYPICAL APPLICATION10μW, S8 Package, 8-Bit A/DSupply Current vs Sample RateSamples at 200Hz and Runs Off a 5V Battery 1000 1μF 5V TA = 25°C VCC = VREF = 5V MPU (μA) (e.g., 8051) CC 100 CS/ VCC P1.4 SHUTDOWN +IN CLK P1.3 ANALOG INPUT LTC1096 0V TO 5V RANGE –IN DOUT P1.2 10 GND VREF SUPPLY CURRENT, I 10968 TA01 1 0.1 1 10 100 SAMPLE FREQUENCY, fSMPL (kHz) 10968 TA02 10968fc 1
