Key facts
- Brand
- Linear Technology
- Model
- LTC1062
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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LINEAR AN20-1 Data Sheet
The document describes the LTC1062 as a versatile, DC accurate instrumentation lowpass filter with gain and phase characteristics that approximate a 5th order Butterworth filter. It utilizes an external resistor and capacitor to isolate the IC from the input signal's DC path, ensuring high DC accuracy. The architecture involves sensing the output voltage through an internal buffer before applying it to an internal switched-capacitor network.
Key topics covered include tuning the filter by selecting appropriate external R and C values based on the desired cutoff frequency, utilizing either an external clock or the internal oscillator (tunable up to 130kHz), managing single supply operation, and analyzing dynamic range and signal-to-noise ratios. The note also addresses issues such as clock feedthrough and harmonic distortion.
Linear Technology LTC1062 specifications
| Supply Voltage Range | +2.5 V to +9 V |
|---|---|
| Input Frequency Range | 0 Hz to 20 kHz |
| Clock‑to‑Cutoff Ratio | 100:1 |
| Maximum Attenuation (100 kHz clock, 1 kHz cutoff) | ≈ 64 dB |
| RMS Noise (DC‑17 kHz) | 100 µV |
Source: Linear Technology LTC1062 5th Order Lowpass Filter Handbook
All Linear Technology LTC1062 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum guaranteed offset voltage over temperature for the buffered output?
The maximum guaranteed offset voltage over temperature is 20mV.
From: LINEAR AN20-1 Data Sheet
What clock frequency should be used for a maximally flat amplitude response?
The clock should be 100 times the desired cutoff frequency.
From: LINEAR AN20-1 Data Sheet
What is the typical RMS noise of the LTC1062?
The RMS noise from DC to 17 kHz is about 100 µV.
From: Linear Technology LTC1062 5th Order Lowpass Filter Handbook
How many LTC1062 devices can be cascaded?
Two LTC1062 devices can be cascaded to form a 10th‑order filter.
From: Linear Technology LTC1062 5th Order Lowpass Filter Handbook