LTC1064-7CSW#PBF

Overview

The LTC1064-7CSW#PBF is a clock-tunable monolithic 8th order lowpass filter with linear passband phase and flat group delay. It features a cutoff frequency up to 100kHz, tuned via an external TTL or CMOS clock. The device offers wide dynamic range, achieving 92dB S/N with ±7.5V supplies. It operates on power supply voltages ranging from ±2.375V to ±8V. The component is housed in a 16-lead plastic SO (Wide) package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Linear Phase Response: Provides flat group delay and linear phase characteristics suitable for time-critical applications.
• Steep Roll-Off: Attenuates signals more effectively than equivalent 8th order Bessel filters at higher frequencies.
• Clock Tunable: Cutoff frequency is adjusted by varying the external clock frequency without additional components.
• High Dynamic Range: Delivers low noise and high signal-to-noise ratio across various supply voltage configurations.

Applications

• Data Communication Filters
• Time Delay Networks
• Phase-Matched Filters

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the CSW designation corresponds to the 16-lead SO Wide package variant. Ensure the supplier provides documentation matching the Analog Devices datasheet specifications for the -7C industrial temperature grade.

Selection Notes

Select this part when linear phase response and steep roll-off are required simultaneously. Choose based on the desired cutoff frequency relative to the available clock source. Verify that the system power supply allows for the necessary headroom to achieve optimal dynamic range and output swing specifications.

Part Context

This component belongs to the LTC1064 series of switched-capacitor filters. It is pin-compatible with other members like the LTC1064-X, LTC1164-7, and LTC1264-7. The -7 designation specifically denotes the linear phase, 8th order lowpass characteristic within this family.

Replacement Considerations

LTC1064-7CN

FAQ

How is the cutoff frequency determined?

The cutoff frequency is set by the ratio of the external clock frequency to the internal circuitry, selectable as 50:1 or 100:1 via Pin 10.

What is the maximum clock frequency?

The maximum clock frequency depends on the supply voltage; it reaches 5.0MHz with ±7.5V supplies.

Does the filter require external capacitors?

No external components are needed to define the filter response, although bypass capacitors are recommended for power supplies.