LTC1290

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
*50kHz Maximum Throughput Rate


Pinout




Specifications

Supply Voltage (V_CC ) to GND or V^- ............................ 12V
Negative Supply Voltage (V^- )........................ 6V to GND
Voltage
   Analog/Reference Inputs.........(V_CC ) 0.3V to V + 0.3V
   Digital Inputs............................................ 0.3V to 12V
   Digital Outputs ............................. 0.3V to V_CC + 0.3V 
Power Dissipation................................................. 500mW
Operating Temperature Range
   LTC1290BC, LTC1290CC, LTC1290DC......... 0 C to 70
   LTC1290BI, LTC1290CI, LTC1290DI ...... 40 C to 85
   LTC1290BM, LTC1290CM,
   LTC1290DM.......................................... 55 C to 125
Storage Temperature Range.................. 65 C to 150
Lead Temperature (Soldering, 10 sec.).................. 300


Description

The LTC^@ 1290 is a data acquisition component which contains a serial I/O successive approximation A/D converter. It uses LTCMOS^TM  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 LTC1290 is idle it can be powered down with a serial word in applications where low power consumption is desired.


The LTC1290 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.