LTC1290 Datasheet | Linear Technology

Single Chip 12-Bit Data Acquisition System Features - Software Programmable Features - Unipolar/Bipolar Conversion - Four Differential/Eight Single-Ended Inputs - MSB- or LSB-First Data Sequence - Variable Data Word Length - Power Shutdown - Built-In Sample-and-Hold - Single Supply 5V or ±5V Operation - Direct Four-Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports - 50k Hz Maximum Throughput Rate - Available in 20-Lead PDIP and SO Wide Packages U KEY SPECIFICATIO S - Resolution: 12 Bits - Fast Conversion Time: 13µs Max Over Temp - Low Supply Current: 6.0m A DESCRIPTIO The LTC®1290 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 12-bit unipolar or 11-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. When the LTC1290 is idle it can be powered down with a serial word in applications where low power consumption is desired. The serial I/O is designed to be patible with industry standard full duplex serial interfaces. It allows either MSBor 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, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors. , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5287525. TYPICAL APPLICATIO 12-Bit 8-Channel Sampling Data Acquisition System SINGLE-ENDED INPUT 0V TO 5V OR ±5V ±15V OVERVOLTAGE RANGE- 1k - - - DIFFERENTIAL INPUT (+) ±5V MON MODE RANGE (- ) - - - CH0 VCC CH1...