LTC1197LIS8#PBF

Analog To Digital Converters (ADC) Overview

The LTC1197LIS8#PBF is a 10-bit successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Analog Devices. It operates on a single 2.7V to 4V supply and supports sampling rates up to 250ksps. The device features a differential analog input, an external reference pin, and a 3-wire serial interface compatible with SPI and Microwire protocols. Packaged in an 8-lead SOIC, it typically dissipates 2.2mW at full speed. Key electrical specifications include a signal-to-noise plus distortion ratio of 58dB and a maximum clock frequency of 3.5MHz.

Analog To Digital Converters (ADC) Feature Summary

• 10-bit resolution with a maximum sampling rate of 250ksps
• Differential analog input with adjustable external reference
• Single 2.7V to 4V supply operation with 2.2mW typical power dissipation
• Auto shutdown functionality reduces power linearly at lower sample rates

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems
• Portable or compact instrumentation
• Battery-operated instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'IS8' indicates industrial temperature range (-45°C to 85°C) and SOIC-8 packaging. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the external reference voltage requirements align with the 2.7V to 4V operating supply constraints.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high speed-to-power efficiency in a compact form factor. The differential input allows measurement of signals floating on a DC common mode voltage. For designs requiring a multiplexer, consider the LTC1199 variant instead. Ensure digital logic levels are compatible with the 2.7V to 4V supply rail.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1197 family of micropower ADCs. It serves as a 10-bit upgrade to the 8-bit LTC1196/LTC1198 series. The 'L' designation specifies low-voltage operation (2.7V), while 'I' denotes the industrial temperature range. It shares pinouts with the LTC1199 but lacks the internal multiplexer.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1197IS8#TRPBF is the tape-and-reel version of this component. The LTC1197LCS8#PBF offers the same electrical characteristics in a commercial temperature range (0°C to 70°C).

Analog To Digital Converters (ADC) FAQ

What is the maximum clock frequency for the LTC1197L?

The maximum recommended clock frequency is 3.5MHz when operating at 2.7V.

Does the LTC1197L have an internal voltage reference?

No, the LTC1197L requires an external reference connected to the VREF pin.

How does the auto shutdown feature work?

Power shutdown is activated when the CS pin is brought high, reducing supply current linearly as the sample rate decreases.