LTC1164-7CSW#TRPBF

Overview

The LTC1164-7CSW#TRPBF is a low power, clock-tunable monolithic 8th order lowpass filter with linear passband phase and flat group delay. It operates on a single 5V supply or dual supplies up to ±8V. The cutoff frequency is tuned via an external TTL or CMOS clock, supporting ratios of 50:1 or 100:1. Key electrical parameters include a typical supply current of 2.5mA at 5V, a maximum clock frequency of 1MHz, and a wide dynamic range with THD + Noise up to 75dB at single 5V. The device provides better than Bessel roll-off, achieving 34dB attenuation at twice the cutoff frequency. It is housed in a 16-lead SW (SOIC Wide) package.

Feature Summary

• Linear phase response with flat group delay for minimal signal distortion
• Clock-tunable cutoff frequency using standard TTL or CMOS signals
• Low power consumption without sacrificing dynamic range
• Steeper roll-off characteristics compared to equivalent Bessel filters

Applications

• Data communication filters
• Time delay networks
• Phase matched filters

Procurement Notes

Verify that the ordering suffix #TRPBF confirms Lead Free status and Tape and Reel packaging format. Confirm the CSW variant corresponds to the 16-lead Plastic SO (Wide) package. Ensure the C suffix matches the required -40°C to 85°C operating temperature range for your specific application environment.

Selection Notes

Select this component when linear phase response and flat group delay are critical requirements. Choose the 50:1 clock ratio for double-sampling to reduce aliasing risks, or the 100:1 ratio for higher attenuation. Ensure the external clock source meets the specified rise/fall time limits to prevent internal jitter. Verify that the input signal amplitude remains within slew rate limitations to avoid distortion at maximum clock frequencies.

Part Context

This part belongs to the LTC1164 family of universal filter building blocks. It is pin-compatible with the LTC1064-X series and LTC1264-7. Unlike the elliptic variants in the same family, the LTC1164-7 prioritizes linear phase performance over steep stopband rejection, making it distinct from the LTC1164-8 which offers ultraselective elliptic filtering.

Replacement Considerations

The N Package (LTC1164-7CN) is listed as an alternate source. The J Package (Ceramic DIP) is obsolete. Direct functional substitutes within the same linear phase family include the LTC1064-7.