LTC1197LCS8#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1197LCS8#TRPBF is a 10-bit, 250ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead MSOP package. It operates on a single 2.7V to 4V supply with typical power dissipation of 2.2mW at full speed. The device features a differential analog input and an external reference pin. It utilizes a 3-wire serial interface compatible with SPI and Microwire protocols. Key electrical parameters include a maximum sampling rate of 250ksps, 1 LSB DNL, 4 LSB gain error, and a signal-to-noise plus distortion ratio of 58dB.

Analog To Digital Converters (ADC) Feature Summary

• 10-Bit Resolution at 250ksps Sampling Rate
• Single 2.7V Supply Operation with 2.2mW Typical Power Dissipation
• Differential Analog Input with Adjustable External Reference
• Auto Shutdown Reduces Power Linearly at Lower Sample Rates

Analog To Digital Converters (ADC) Applications

• High Speed Data Acquisition Systems
• Portable or Compact Instrumentation
• Low Power or Battery-Operated Instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix CS8 corresponds to the 8-lead MSOP plastic package and TRPBF indicates tape and reel packaging with lead-free finish. Confirm the 'L' designation ensures operation down to 2.7V. Check for RoHS compliance documentation as required by project specifications.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 10-bit resolution is required with a single 2.7V supply. The differential input architecture allows measurement of signals floating on a DC common mode voltage. Ensure the system clock frequency does not exceed 3.5MHz to maintain specified performance limits at the lower supply voltage.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1197 family of switched-capacitor ADCs. It is the low-voltage variant of the LTC1197, designed specifically for 2.7V operation compared to the standard 5V version. It shares pin compatibility with the LTC1199 series but lacks the internal multiplexer, offering a dedicated differential input channel instead.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1197CMS8#TRPBF serves as a direct replacement for 5V applications, though supply voltage constraints must be addressed. For systems requiring an integrated multiplexer, the LTC1199LCS8#TRPBF is the functional equivalent within the same voltage range.

Analog To Digital Converters (ADC) FAQ

What is the maximum clock frequency for the LTC1197L at 2.7V?

The maximum recommended clock frequency for the LTC1197L operating at 2.7V is 3.5MHz.

Does the LTC1197L have an internal voltage reference?

No, the LTC1197L requires an external voltage reference connected to the VREF pin to define the input span.

How does the auto shutdown feature affect power consumption?

The automatic power down reduces supply current linearly as the sample rate is reduced, allowing for micropower performance in intermittent sampling applications.