LTC1289 Datasheet | Linear Technology

3 Volt Single Chip 12-Bit Data Acquisition System + Features - Single Supply 3.3V or ±3.3V Operation - Software Programmable Features Unipolar/Bipolar Conversions 4 Differential/8 Single-Ended Inputs Variable Data Word Length Power Shutdown - Built-In Sample-and-Hold - Direct 4-Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports - 25k Hz Maximum Throughput Rate - Available in 20-Lead PDIP and 20-Lead SW Packages U APPLICATIO S - Minimum Guaranteed Supply Voltage: 2.7V - Resolution: 12 Bits - Fast Conversion Time: 26µs Max Over Temp - Low Supply Currents: 1.0m A DESCRIPTIO The LTC®1289 is a 3V data acquisition ponent which contains a serial I/O successive approximation A/D converter. The device specifications are guaranteed at a supply voltage of 2.7V. It uses LTCMOSTM switched capacitor technology to perform a 12-bit unipolar, or 11-bit plus sign bipolar A/D conversion. 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 LTC1289 is idle it can be powered down 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. , LT, LTC and LTM 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. TYPICAL APPLICATIO Single Cell 3V 12-Bit Data Acquisition System +3V - 1/4 LTC1079 + 1N4148 10Ω 10µF - 3V FOR OVERVOLTAGE PROTECTION ON ONLY ONE CHANNEL LIMIT THE INPUT CURRENT TO 15m A. FOR MORE THAN ONE CHANNEL...