LTC1090 Datasheet | Linear Technology

LTC1090 Single Chip 10-Bit Data Acquisition System Features - DESCRIPTIO - - - - 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 30k Hz Maximum Throughput Rate The LTC®1090 is a data acquisition ponent which contains a serial I/O successive approximation A/D converter. It uses LTCMOSTM 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 binations thereof). An on-chip sample and hold is included for all single ended input channels. The serial I/O is designed to be patible with industry standard full duplex serial interfaces. It allows either MSB or LSB first data and automatically provides 2’s plement 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. U KEY SPECIFICATIO S - - - - Resolution: 10 Bits Total Unadjusted Error (LTC1090A): ± 1/2LSB Max Conversion Time: 22µs Supply Current: 2.5m A Max, 1.0m A Typ , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corp. TYPICAL APPLICATIO LTC1090 DIFFERENTIAL INPUT 5V BIPOLAR INPUT 5V - 5V DOUT DIN T UNIPOLAR INPUTS SCLK CS FOR 8051 CODE SEE APPLICATIONS INFORMATION SECTION MPU (e.g., 8051) ERROR...