LTC1562-2

Features:

Continuous Time-No Clock
Four 2nd Order Filter Sections, 20kHz to 300kHz Center Frequency
Butterworth, Chebyshev, Elliptic or Equiripple Delay Response
Lowpass, Bandpass, Highpass Responses
99dB Typical S/N, ±5V Supply (Q = 1)
93dB Typical S/N, Single 5V Supply (Q = 1)
Rail-to-Rail Input and Output Voltages
DC Accurate to 3mV (Typ)
±0.5% Typical Center Frequency Accuracy
"Zero-Power" Shutdown Mode
Single or Dual Supply, 5V to 10V Total
Resistor-Programmable f_O, 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


Pinout




Specifications

Total Supply Voltage (V ⁺ to V ) .............................. 11V
Maximum Input Voltage at Any Pin ............................ (V 0.3V)  V (V ⁺ + 0.3V)
Storage Temperature Range ..................................... 65°C to 150°C
Operating Temperature Range
    LTC1562C-2 .......................................................... 0°C to 70°C
    LTC1562I-2 ........................................................... 40°C to 85°C
Lead Temperature (Soldering, 10 sec) ...................... 300°C


Description

The LTC^®1562-2 is a low noise, low distortion continuous time filter with rail-to-rail inputs and outputs, optimized for a center frequency (f_O) of 20kHz to 300kHz. It contains four independent 2nd order filter blocks, which 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 and elliptic responses can also be realized.

The LTC1562-2 is designed for applications where dynamic range is important. For example, by cascading 2nd order sections in pairs, the user can configure the IC as a dual 4th order Butterworth lowpass filter with over 90dB signal-tonoise ratio from a single 5V power supply. Low level signals can exploit the built-in gain capability of the LTC1562-2. Varying the gain of a section can achieve a dynamic range as high as 114dB with a ±5V supply.

Other cutoff frequency ranges can be provided upon request. Please contact LTC Marketing.