LTC1064-1ACN#PBF

Overview

The LTC1064-1ACN#PBF is an 8th order, clock sweepable elliptic lowpass switched capacitor filter in a 14-pin PDIP package. It operates from ±2.37V to ±8V supplies with a maximum corner frequency of 50kHz and a 100:1 clock-to-center frequency ratio. The device features 150µVRMS wideband noise and 0.03% THD at 3VRMS input. Passband ripple is guaranteed at ±0.1dB over the full military temperature range (-40°C to +85°C). Stopband attenuation reaches 68dB minimum at 1.5 times the cutoff frequency.

Feature Summary

• Integrated 8th order elliptic lowpass filter topology within a compact 14-pin package
• Clock-programmable cutoff frequency with a fixed 100:1 tuning ratio
• Low harmonic distortion and wideband noise performance comparable to discrete op amp designs
• Guaranteed passband ripple specifications across the full operating temperature range

Applications

• Antialiasing filters for data acquisition systems
• Telecom PCM filters
• Precision signal conditioning front ends

Procurement Notes

Verify the specific AC suffix indicates extended temperature range compliance against the datasheet specifications. Confirm the N package designation matches the required 14-lead plastic DIP form factor. Ensure power supply bypassing components are included in the bill of materials as they are not integrated internally.

Selection Notes

Select this component when high-order filtering is required without external passive components. Use compensation capacitors on pins 1, 6, 7, and 13 if the target cutoff frequency exceeds 20kHz to maintain passband flatness. Verify that the system clock source can provide the necessary TTL or CMOS levels up to 5MHz.

Part Context

This part belongs to the LTC1064 family of switched capacitor filters. It is pin-compatible with the LTC1064-2 variant. The AC suffix denotes the commercial/extended temperature grade compared to the standard C version. Related parts include the LTC1069 series for lower power applications.

Replacement Considerations

The LTC1064-2 is a pin-compatible alternative within the same family. For single-supply operation, consider the LTC1569 series which includes an internal precision clock.