LTC1293/LTC1294/LTC1296 Single Chip 12-Bit Data Acquisition System DESCRIPTIO FEATURES Software Programmable Features The LTC1293/4/6 is a family of data acquisition systems Unipolar/Bipolar Conversion which contain a serial I/O successive approximation A/D TM Differential/Single Ended Inputs converter. It uses LTCMOS switched capacitor technol- MSB-First or MSB/LSB Data Sequence ogy to perform either 12-bit unipolar, or 11-bit plus sign Power Shutdown bipolar A/D conversions. The input multiplexer can be Built-In Sample and Hold configured for either single ended or differential inputs (or Single Supply 5V or 5V Operation combinations thereof). An on-chip sample and hold is Direct 4-Wire Interface to Most MPU Serial included for all single ended input channels. When the Ports and All MPU Parallel Ports LTC1293/4/6 is idle it can be powered down in applica- 46.5kHz Maximum Throughput Rate tions where low power consumption is desired. The System Shutdown Output (LTC1296) LTC1296 includes a System Shutdown Output pin which can be used to power down external circuitry, such as signal conditioning circuitry prior to the input mux. KEY SPECIFICATIO S The serial I/O is designed to communicate without external Resolution: 12 Bits hardware to most MPU serial ports and all MPU parallel Fast Conversion Time: 12s Max Over Temp I/O ports allowing up to eight channels of data to be Low Supply Current: 6.0mA transmitted over as few as three wires. TM LTCMOS is a trademark of Linear Technology Corporation TYPICAL APPLICATI 12-Bit Data Acquisition System with Power Shutdown R B 5.1k 2N3906 R2 74HC04 CH0 V + 1.2M +5V CC R1 1/4 LT1014 CH1 SSO 47F 10k CH2 CLK CH3 CS 350 STRAIN MPU GAUGE BRIDGE CH4 D OUT R2 1N4148 LTC1296 1.2M CH5 D IN + CH6 REF C2 1F CH7 REF COM AGND THREE ADDITIONAL STRAIN GAUGE INPUTS DGND V CAN BE ACCOMMODATED USING THE OTHER AMPLIFIERS IN THE LT1014 LTC1293 TA01 129346fs 1 O U U ULTC1293/LTC1294/LTC1296 (Notes 1 and 2) ABSOLUTEXAI U RATI GS Power Dissipation............................................. 500mW Supply Voltage (V ) to GND or V ......................... 12V CC Operating Temperature Range Negative Supply Voltage (V ) ..................... 6V to GND LTC1293/4/6BC, LTC1293/4/6CC, Voltage LTC1293/4/6DC ....................................... 0C to 70C Analog and Reference LTC1296BI, LTC1296CI, LTC1296DI ... 40C to 85C Inputs ............................ (V ) 0.3V to V + 0.3V CC Storage Temperature Range ..................65C to 150C Digital Inputs ......................................... 0.3V to 12V Lead Temperature (Soldering, 10 sec.)................ 300C Digital Outputs .......................... 0.3V to V + 0.3V CC / (Top Views) Consult factory for Industrial and Military grades. PACKAGE ORDER I FOR ATIO ORDER PART ORDER PART CH0 1 CH0 1 16 V 16 V CC CC NUMBER NUMBER CH1 2 15 CLK CH1 2 15 CLK 3 CS CH2 3 14 CS CH2 14 LTC1293BCSW LTC1293BCN 4 13 D CH3 4 13 D CH3 OUT OUT LTC1293CCSW LTC1293CCN CH4 5 CH4 5 12 D 12 D IN IN CH5 6 11 V CH5 6 11 V REF REF LTC1293DCSW LTC1293DCN 7 AGND COM 7 10 AGND COM 10 8 9 V DGND 8 9 V DGND SW PACKAGE, 16-LEAD PLASTIC SO WIDE N PACKAGE, 16-LEAD PDIP T = 110C, = 150C/ W T = 110C, = 100C/ W (N) JMAX JA JMAX JA CH0 1 20 DV CC LTC1294BCN 2 19 AV CH1 CC CH0 1 20 DV CC LTC1294CCN 3 18 CLK CH2 CH1 2 19 AV CC LTC1294BCSW CH3 4 17 CS LTC1294DCN CH2 3 18 CLK CH4 5 16 D LTC1294CCSW OUT CH3 4 17 CS 6 15 D CH5 IN LTC1294DCSW CH4 5 16 D OUT + 7 14 REF CH6 CH5 6 15 D IN CH7 8 13 REF + CH6 7 14 REF COM 9 12 AGND CH7 8 13 REF 10 11 V DGND COM 9 12 AGND N PACKAGE, 20-LEAD PDIP DGND 10 11 V T = 110C, = 100C/ W (N) JMAX JA SW PACKAGE, 20-LEAD PLASTIC SO WIDE J PACKAGE, 20-LEAD CERDIP LTC1294BCJ T = 110C, = 150C/ W JMAX JA T = 150C, = 80C/ W (J) JMAX JA LTC1294CCJ OBSOLETE PACKAGE LTC1294DCJ Consider the N Package for Alternate Source CH0 1 20 V CC LTC1296BIN CH1 2 19 SSO CH0 1 20 V CC LTC1296CIN 3 18 CLK CH2 LTC1296BCSW CH1 2 19 SSO 4 17 CS CH3 LTC1296DIN CH2 3 18 CLK LTC1296CCSW CH4 5 16 D OUT LTC1296BCN CH3 4 17 CS CH5 6 15 D IN LTC1296DCSW CH4 5 16 D OUT + LTC1296CCN 7 14 REF CH6 LTC1296BISW CH5 6 15 D IN CH7 8 13 REF LTC1296DCN + CH6 7 14 REF LTC1296CISW COM 9 12 AGND CH7 8 13 REF DGND 10 11 V LTC1296DISW COM 9 12 AGND DGND 10 11 V N PACKAGE, 20-LEAD PDIP T = 110C, = 100C/ W (N) JMAX JA SW PACKAGE, 20-LEAD PLASTIC SO WIDE J PACKAGE, 20-LEAD CERDIP LTC1296BCJ T = 110C, = 150C/ W JMAX JA T = 150C, = 80C/ W (J) JMAX JA LTC1296CCJ OBSOLETE PACKAGE LTC1296DCJ Consider the N Package for Alternate Source 129346fs 2 U WU U W W W