The LTC1564 is a new type of continuous time filter for antialiasing, reconstruction and other band-limiting applications. It has one analog input pin and one analog output pin. The cutoff frequency (fC) and gain are programmable while the shape of the lowpass response is fixed. A latching digital interface stores fC and gain settings or it can be bypassed for control directly from the pins. The LTC1564 operates from 2.7V to 10V total (single or split supplies) and comes in a 16-pin surface mount package.
The LTC1564 is a digitally controlled 8th‑order low‑pass filter with a programmable cutoff frequency and gain. It offers a rail‑to‑rail input and output range, operates from 2.7 V to 10 V, and delivers a total dynamic range of 122 dB. The device is supplied in a 16‑lead plastic SSOP package and requires no external components.
The document lists absolute maximum ratings, electrical characteristics, pin descriptions, and typical performance curves. It also includes example applications such as antialias filtering for DSP front ends and low‑noise input buffering. Detailed tables show how the digital F and G codes set the cutoff frequency and passband gain.
| Cutoff frequency range | 10 kHz – 150 kHz |
|---|---|
| Passband gain range | 1 – 16 (1 V/V steps) |
| Supply voltage range | 2.7 V to 10 V |
| Total system dynamic range | 122 dB |
| Total supply voltage (typical) | 10.5 V |
| Input impedance (gain = 1) | 10 kΩ |
The cutoff frequency is adjustable from 10 kHz to 150 kHz in 10 kHz steps.
The passband gain can be programmed from 1 to 16 in 1 V/V steps.
It operates from 2.7 V to 10 V, either as a single supply or split supplies.
The device provides a total system dynamic range of 122 dB.