LTC1290CISW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1290CISW#PBF is a single-chip 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates an 8-channel analog multiplexer, a sample-and-hold circuit, and a successive approximation A/D converter using LTCMOS switched capacitor technology. The device supports unipolar (12-bit) or bipolar (11-bit plus sign) conversions with a maximum throughput rate of 50kHz and a conversion time of 13µs max over temperature. It operates on a single +5V supply or ±5V supplies, drawing 6.0mA typical current. The component features a synchronous full-duplex serial interface compatible with industry standards, allowing direct connection to microprocessor serial ports.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 12-bit SAR ADC with 8-channel input multiplexer supporting single-ended or differential configurations
• Synchronous full-duplex serial I/O interface with software-programmable MSB/LSB-first data sequence and variable word lengths (8, 12, or 16 bits)
• On-chip sample-and-hold for all single-ended channels with power-down capability via serial command
• Direct four-wire interface to MPU serial ports or parallel ports without external hardware

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel signal acquisition
• Data acquisition modules interfacing with IBM PC serial ports or similar microprocessors
• Weaving machine warp tension monitoring and precision control systems
• General-purpose sensor interfaces in embedded computing environments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS3 adherence as per manufacturer documentation. Confirm the 'I' grade designation corresponds to the -40°C to 85°C industrial operating temperature range. Ensure the SW package variant matches the required surface-mount footprint specifications for PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a high channel count (8 channels) is required within a single IC package. Choose the CISW#PBF variant for industrial temperature ranges (-40°C to 85°C) and surface-mount assembly. Consider the 50kHz throughput limit and 13µs conversion time against application speed requirements. Verify that the serial interface timing aligns with the target microprocessor's clock capabilities.

Analog To Digital Converters (ADC) Part Context

The LTC1290 belongs to Linear Technology's family of single-chip data acquisition systems. The 'C' grade denotes commercial performance specifications, while the 'I' suffix specifies the extended industrial temperature range. The 'SW' indicates a 20-lead Plastic SO Wide package. This part serves as a complete solution for replacing discrete MUX, S/H, and ADC components in cost-sensitive data acquisition designs.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the LTC1290BCSW#PBF and LTC1290CCSW#PBF. These variants share identical functional specifications but differ in temperature grades (Commercial vs Industrial). Verify pinout compatibility and electrical parameters before substitution.