ADI LTC1094CN#PBF

The 10-bit data acquisition systems are designed to provide complete function, excellent accuracy and ease of use when digitizing analog data from a wide variety of signal sources and transducers. Built around a 10-bit, switched capacitor, successive approximation A/D core, these devices include software configurable analog multiplexers and bipolar and unipolar conversion modes as well as on-chip sample-and-holds. On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers. These circuits can provide a complete data acquisition system in ratiometric applications or can be used with an external reference in others. 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 (1 ppm/°C typically) allowing all grades to be specified with offset and linearity errors of ±0.5 LSB 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 ±1 LSB maximum over temperature. The lower grade has a full-scale specification of ±2 LSB for applications where full scale is adjustable or less critical.

• 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 Current: LTC1091: 3.5mA Max, 1.5mA Typ; LTC1092/LTC1093/LTC1094: 2.5mA Max, 1mA Typ