LTC1564

Features:

4-Bit Digitally Controlled 8th-Order Lowpass Filter
f  Adjustable from 10kHz to 150kHz in 10kHz UTOFF teps
100dB Attenuation at 2.5 `  fCUTOFF
4-Bit Digitally Controlled Programmable Gain mplifier
G = 1 to 16 in 1V/V Steps
Miniature 16-Pin SSOP PackageNo External Components122dB Total System Dynamic Range
Rail-to-Rail Input and Output Range2.7V to 10V Operation
Low Noise Mute Mode
Low Power Shutdown Mode


Application

Antialias or Reconstruction FilteringDSP Systems ommunications Systems cientific Instruments igh Resolutions (16 Bits to 20 Bits) rocessing Signals Buried in Noise udio Signal Processing rogrammable Data Rates utomatic Gain Control (AGC) ingle Part Replacing Multiple Filters


Pinout




Specifications

(Note 1)
Total Supply Voltage (V⁺  to V ) .......................  11V
Input Voltage .................... V⁺   + 0.3V to V  0.3V
Output Short-Circuit Duration......................Indefinite
Operating Temperature Range
       LTC1564C..........................................0C to 70 C
       LTC15641................................... 40 C TO 85 C
Storage Temperature Range............ 65 C to 150 C
Lead Temperature (Soldering, 10 sec).............300 C

Description

The LTC^(R) 1564 is a new type of continuous time filter for ntialiasing, reconstruction and other band-limiting appli ations. No other analog components or filter expertise are eeded to use it. There is one analog input pin and one nalog output pin. The cutoff frequency (f ) and gain are rogrammable while the shape of the lowpass response is ixed. A latching digital interface stores f  and gain settings rt can be bypassed for control directly from the pins.TheLTC1564 operates from 2.7V to 10V total (single or split upplies) and comes in a 16-pin surface mount SSOP.

The LTC1564 is a rail-to-rail high resolution 8th-order owpass filter with two stopband notches, giving approxiately 100dB attenuation at 2.5 times the assband cutoff requency f  (a de-facto standard for DSP front ends).Signals with low or variable levels can be normalized with he built-in variable gain that reduces input-referred noise ith increasing gain for a typical dynamic range (maximum signal level to minimum noise) of 122dB (20 equivalent bits) with 20kHz f_C  and 118dB at 100kHz f_C  on a -5V upply.

Other frequency-response shapes can be provided upon equest. Please contact LTC Marketing.