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LTC1294CI Datasheet(PDF) 1 Page - Linear Technology |
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LTC1294CI Datasheet(HTML) 1 Page - Linear Technology |
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1 / 28 page  1 LTC1293/LTC1294/LTC1296 Single Chip 12-Bit Data Acquisition System The LTC1293/4/6 is a family of data acquisition systems which contain a serial I/O successive approximation A/D converter. It uses LTCMOS TM switched capacitor technol- ogy to perform either 12-bit unipolar, or 11-bit plus sign bipolar A/D conversions. The input multiplexer can be configured for either single ended or differential inputs (or combinations thereof). An on-chip sample and hold is included for all single ended input channels. When the LTC1293/4/6 is idle it can be powered down in applica- tions where low power consumption is desired. The 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. The serial I/O is designed to communicate without external hardware to most MPU serial ports and all MPU parallel I/O ports allowing up to eight channels of data to be transmitted over as few as three wires. DESCRIPTIO S FEATURE s Software Programmable Features Unipolar/Bipolar Conversion Differential/Single Ended Inputs MSB-First or MSB/LSB Data Sequence Power Shutdown s Built-In Sample and Hold s Single Supply 5V or ±5V Operation s Direct 4-Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports s 46.5kHz Maximum Throughput Rate s System Shutdown Output (LTC1296) s Resolution ..................................................... 12 Bits s Fast Conversion Time ............ 12 µs Max Over Temp. s Low Supply Current ........................................ 6.0mA KEY SPECIFICATIO S APPLICATI TYPICAL 12-Bit Data Acquisition System with Power Shutdown LTCMOS TM is a trademark of Linear Technology Corporation CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM DGND – + RB 5.1k R2 1.2M R1 10k 1/4 LT1014 R2 1.2M C2 1 µF 350 Ω STRAIN GAUGE BRIDGE +5V 47 µF 1N4148 MPU LTC1296 VCC SSO CLK CS DOUT DIN REF+ REF– AGND V– THREE ADDITIONAL STRAIN GAUGE INPUTS CAN BE ACCOMMODATED USING THE OTHER AMPLIFIERS IN THE LT1014 LTC1293 TA01 2N3906 74HC04 |
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