Features and Benefits
- 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 Responses
- 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
The LTC1562 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.
The LTC1562 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 94dB signal-to-noise ratio from a single 5V power supply. Low level signals can exploit the built-in gain capability of the LTC1562. Varying the gain of a section can achieve a dynamic range as high as 118dB with a ±5V supply.
Other cutoff frequency ranges can be provided upon request. Please contact LTC Marketing.
- 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
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit DC266B-A is for the evaluation of 8th order filter circuits using an LTC1562 (no dash) and DC266B-B for an LTC1562-2. LTC1562 and LTC1562-2 are quad 2nd order active-RC filter building blocks. Each 2nd order section has an integrator trimmed with internal capacitors and resistors to 100kHz and 200 kHz for the LTC1562 and LTC1562-2 respectively. The trimmed frequency error is ±0.6% for the LTC1562A and ±1.5% for the LTC1562-2. The LTC1562 or LTC1562-2 2nd order sections can be configured with external resistors to implement lowpass, bandpass or highpass filters.
Documentation & Resources
R401 Reliability Data3/26/2018
DC266B - Demo Manual11/18/2016
DC Accurate, Rail-to-Rail Active RC Lowpass Filter Replaces Discrete Designs—One Resistor Value Sets the Cutoff Frequency5/1/2000 LT Journal
Sharp Gain Roll-Offs Using the LTC1562 Quad Operational Filter IC (Part 3)11/1/1999 LT Journal
How to Design High Order Filters with Stopband Notches Using the LTC1562 Operational Filter (Part 2)2/1/1999 LT Journal
New Universal Continuous-Time Filter with Extended Frequency Range2/1/1999 LT Journal
How to Design High Order Filters with Stopband Notches Using the LTC1562 Quad Operational Filter (Part 1)5/1/1998 LT Journal
Universal Continuous-Time Filter Challenges Discrete Designs2/1/1998 LT Journal
Tools & Simulations
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Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC1562ACG#PBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562ACG#TRPBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562AIG#PBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562AIG#TRPBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562CG#PBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562CG#TRPBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562CN#PBF||Material Declaration||Reliability Data||16-Lead PDIP (Narrow 0.30 Inch)|
|LTC1562IG#PBF||Material Declaration||Reliability Data||20-Lead SSOP|
|LTC1562IG#TRPBF||Material Declaration||Reliability Data||20-Lead SSOP|
|Wafer Fabrication Data||R401 Reliability Data|
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