LTC1562

Features:

Continuous Time-No Clock
Four 2nd Order Filter Sections, 10kHz to 150kHz Center Frequency
±0.5% Typical Center Frequency Accuracy
±0.3% Typical Center Frequency Accuracy (A Grade)
Wide Variety of Response Shapes
Lowpass, Bandpass and Highpass Response
103dB Typical S/N, ±5V Supply (Q = 1)
97dB Typical S/N, Single 5V Supply (Q = 1)
96dB Typical S/(N + THD) at ±5V Supply, 20kHz Input
Rail-to-Rail Input and Output Voltages
DC Accurate to 3mV (Typ)
"Zero-Power" Shutdown Mode
Single or Dual Supply, 5V to 10V Total
Resistor-Programmable fO, Q, Gain


Application

High Resolution Systems (14 Bits to 18 Bits)
Antialiasing/Reconstruction Filters
Data Communications, Equalizers
Dual or I-and-Q Channels (Two Matched 4th Order Filters in One Package)
Linear Phase Filtering
Replacing LC Filter Modules


Specifications

Total Supply Voltage (V+ to V) .............................. 11V
Maximum Input Voltage
at Any Pin ......................(V 0.3V) £ V £ (V + + 0.3V)
Operating Temperature Range
LTC1562C.................................................. 0°C to 70°C
LTC1562I ............................................ 40°C to 85°C
Storage Temperature Range ............. 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C


Description

The LTC®1562 is a low noise, low distortion continuous-time filter with rail-to-rail inputs and outputs, optimized for a center frequency (fO) of 10kHz to 150kHz. Unlike most monolithic filters, no clock is needed. Four independent 2nd order filter blocks can be cascaded in any combination, such as one 8th order or two 4th order filters. Each block's response is programmed with three external resistors for center frequency, Q and gain, using simple design formulas.
Each 2nd order block provides lowpass and bandpass outputs. Highpass response is available if an external capacitor replaces one of the resistors. Allpass, notch and elliptic responses can also be realized.