LTC1091 - 1, 2, 6 and 8 Channel, 10-Bit Serial I/O Data Acquisition Systems

The H (Metal Can), J (Ceramic), and K (Metal Can) Packages From Linear Technology Are Now Obsolete

The high impedance analog inputs and the ability to operate with reduced spans (below 1V full scale) allow direct connection to sensors and transducers in many applications, eliminating the need for gain stages. An efficient serial port communicates without external hardware to most MPU serial ports and all MPU parallel I/O ports allowing eight channels of data to be transmitted over as few as three wires. This, coupled with low power consumption, makes remote location possible and facilitates transmitting data through isolation barriers. Temperature drift of offset, linearity and full-scale error are all extremely low (1ppm/°C typically) allowing all grades to be specified with offset and linearity errors of ±0.5LSB maximum over temperature. In addition, the A grade devices are specified with full-scale error and total unadjusted error (including the effects of offset, linearity and full-scale errors) of ±1LSB maximum over temperature. The lower grade has a full-scale specification of ±2LSB for applications where full scale is adjustable or less critical.

特点

Programmable Features– Unipolar/Bipolar Conversions– Differential/Single-Ended Multiplexer Configurations
Sample-and-Holds
Single Supply 5V, 10V or ±5V Operation
Direct 3- or 4-Wire Interface to Most MPU Serial Ports and All MPU Parallel I/O Ports
Analog Inputs Common Mode to Supply Rails
Resolution: 10 Bits
Total Unadjusted Error (A Grade): ±1LSB Over Temp
Fast Conversion Time: 20µs
Low Supply CurrentLTC1091: 3.5mA Max, 1.5mA TypLTC1092/LTC1093/LTC1094: 2.5mA Max, 1mA Typ