Zenode.ai Logo
Beta
K

LTC1063 Series

DC Accurate, Clock-Tunable 5th Order Butterworth Lowpass Filter

Manufacturer: Analog Devices

Catalog

DC Accurate, Clock-Tunable 5th Order Butterworth Lowpass Filter

Key Features

• Clock-Tunable Cutoff Frequency
• 1mV DC Offset (Typical)
• 80dB CMRR (Typical)
• Internal or External Clock
• 50µVRMSClock Feedthrough
• 100:1 Clock-to-Cutoff Frequency Ratio
• 95µVRMSTotal Wideband Noise
• 0.01% THD at 2VRMSOutput Level
• 50kHz Maximum Cutoff Frequency
• Cascadable for Faster Roll-Off
• Operates from ±2.375 to ±8V Power Supplies
• Self-Clocking with 1 RC
• Available in 8-Pin DIP and 16-Pin SO Wide Packages

Description

AI
The LTC1063 is the first monolithic filter providing both clock-tunability, low DC output offset and over 12-bit DC accuracy. The frequency response of the LTC1063 closely approximates a 5th order Butterworth polynomial. With appropriate PCB layout techniques the output DC offset is typically 1mV and is constant over a wide range of clock frequencies. With ±5V supplies and ±4V input voltage range, the CMR of the device is 80dB.The filter cutoff frequency is controlled either by an internal or external clock. The clock-to-cut off frequency ratio is 100:1. The on-board clock is power supply independent, and it is programmed via an external RC. The 50µVRMSclock feed through is considerably reduced over existing monolithic filters.The LTC1063 wideband noise is 95µVRMS, and it can process large AC input signals with low distortion. With ±7.5V supplies, for instance, the filter handles up to 4VRMS(92dB S/N ratio) while the standard 1kHz THD is below 0.02%; 80dB dynamic ranges (S/N +THD) is ob-tained with input levels between 1VRMSand 2.3VRMS.The LTC1063 is available in 8-pin miniDIP and 16-pin SO wide packages. For a linear phase response, see LTC1065 data sheet.ApplicationsAudioStrain Gauge AmplifiersAnti-Aliasing FiltersLow Level FilteringDigital Voltmeters60Hz Lowpass FiltersSmoothing FiltersReconstruction Filters