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LTC1090CSW Datasheet(PDF) 1 Page - Linear Technology |
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LTC1090CSW Datasheet(HTML) 1 Page - Linear Technology |
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1 / 28 page  1 LTC1090 1090fc Single Chip 10-Bit Data Acquisition System ■ Software Programmable Features: Unipolar/Bipolar Conversions 4 Differential/8 Single Ended Inputs MSB or LSB First Data Sequence Variable Data Word Length ■ Built-In Sample and Hold ■ Single Supply 5V, 10V or ±5V Operation ■ Direct 4 Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports ■ 30kHz Maximum Throughput Rate ■ Resolution: 10 Bits ■ Total Unadjusted Error (LTC1090A): ±1/2LSB Max ■ Conversion Time: 22µs ■ Supply Current: 2.5mA Max, 1.0mA Typ The LTC ®1090 is a data acquisition component which contains a serial I/O successive approximation A/D con- verter. It uses LTCMOS TM switched capacitor technology to perform either 10-bit unipolar, or 9-bit plus sign bipolar A/D conversions. The 8-channel 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. The serial I/O is designed to be compatible with industry standard full duplex serial interfaces. It allows either MSB or LSB first data and automatically provides 2’s complement output coding in the bipolar mode. The output data word can be programmed for a length of 8, 10, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors. The LTC1090A is specified with total unadjusted error (including the effects of offset, linearity and gain errors) less than ±0.5LSB. The LTC1090 is specified with offset and linearity less than ±0.5LSB but with a gain error limit of ±2LSB for applications where gain is adjustable or less critical. FEATURES DESCRIPTIO LTCMOS is a trademark of Linear Technology Corp. , LTC and LT are registered trademarks of Linear Technology Corporation. KEY SPECIFICATIO S LTC1090 • TA02 OUTPUT CODE 0 512 1024 1.0 0.5 0.0 – 0.5 –1.0 Linearity Plot TYPICAL APPLICATIO 5V LTC1090 MPU (e.g., 8051) FOR 8051 CODE SEE APPLICATIONS INFORMATION SECTION DIFFERENTIAL INPUT BIPOLAR INPUT –5V 5V –5V (+) (–) T LTC1090 • TA01 UNIPOLAR INPUTS P1.1 DOUT P1.2 DIN P1.3 SCLK P1.4 CS SERIAL DATA LINK – UNIPOLAR INPUT |
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