The LTC1064-3 is a monolithic 8th‑order low‑pass Bessel filter that provides a linear phase response across its passband. An external TTL or CMOS clock programs the filter's cutoff frequency, with selectable clock‑to‑cutoff ratios of 75:1, 120:1, or 150:1. The device operates from a single supply of +2.37 V to +8 V and requires no external components.
Key specifications include a maximum corner frequency of 95 kHz, total harmonic distortion of 0.03 % or better, wideband noise of 60 µV rms, and a typical power‑supply current of up to 32 mA. The pin‑out is described in detail, with power‑supply pins, clock pin, analog ground pins, and a ratio pin that sets the filter's frequency ratio. Typical performance graphs and absolute maximum ratings are provided for design reference.
| Maximum Corner Frequency | 95 kHz |
|---|---|
| Supply Voltage Range | +2.37 V to +8 V |
| Total Harmonic Distortion | 0.03 % or better |
| Wideband Noise | 60 µV rms |
It operates from a single supply of +2.37 V up to +8 V.
No external components are needed for normal operation.
The maximum cutoff frequency is 95 kHz.