The LTC1290BISW is a data acquisition component which contains a serial I/O successive approximation A/D converter. It uses LTCMOS™ 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 combinations thereof). An on-chip sample-and-hold is included for all single-ended input channels. When the LTC1290BISW 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 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, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors.
Feature
- 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
- 50kHz Maximum Throughput Rate
- Available in 20-Lead PDIP and SO Wide Packages
Applications
- Resolution: 12 Bits
- Fast Conversion Time: 13µs Max Over Temp
- Low Supply Current: 6.0mA
(Picture: Pinout)
