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LTC1065CS PDF预览

LTC1065CS

更新时间: 2024-01-13 20:51:54
品牌 Logo 应用领域
凌特 - Linear 时钟
页数 文件大小 规格书
12页 315K
描述
DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter

LTC1065CS 数据手册

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LTC1065  
DC Accurate, Clock-Tunable  
Linear Phase 5th Order Bessel  
Lowpass Filter  
U
DESCRIPTIO  
EATURE  
Clock-Tunable Cutoff Frequency  
1mV DC Offset (Typical)  
80dB CMR (Typical)  
Internal or External Clock  
50µVRMS Clock Feedthrough  
100:1 Clock-to-Cutoff Frequency Ratio  
80µVRMS Total Wideband Noise  
0.004% Noise + THD at 2VRMS Output Level  
50kHz Maximum Cutoff Frequency  
Cascadable for Faster Roll-Off  
Operates from ±2.375 to ±8V Power Supplies  
Self-Clocking with 1 RC  
S
F
The LTC1065 is the first monolithic filter providing both  
clock-tunability with low DC output offset and over 12-bit  
DC accuracy. The frequency response of the LTC1065  
closely approximates a 5th order Bessel 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 typically 80dB.  
The filter cutoff frequency is controlled either by an inter-  
nalorexternalclock. Theclock-to-cutofffrequencyratiois  
100 :1. The on-board clock is nearly power supply inde-  
pendent and it is programmed via an external RC. The  
50µVRMS clock feedthrough of the device is considerably  
lower than other existing monolithic filters.  
O U  
PPLICATI  
A
S
Audio  
The LTC1065 wideband noise is 80µVRMS and it can  
process large AC input signals with low distortion. With  
±7.5V supplies, for instance, the filter handles up to  
4VRMS (94dB S/N ratio) while the standard 1kHz THD is  
below 0.005%; 87dB dynamic range (S/N + THD) is ob-  
Strain Gauge Amplifiers  
Anti-Aliasing Filters  
Low Level Filtering  
Digital Voltmeters  
Smoothing Filters  
Reconstruction Filters  
tained with input levels between 2VRMS and 2.5VRMS  
.
TheLTC1065isavailablein8-pinminiDIPand16-pinSOL.  
For a Butterworth response, see LTC1063 data sheet. The  
LTC1065 is pin compatible with the LTC1063.  
U
O
TYPICAL APPLICATI  
Frequency Response  
3.4kHz Single 5V Supply Bessel Lowpass Filter  
10  
0
5V  
1
2
3
4
8
7
6
5
–10  
–20  
–30  
–40  
–50  
–60  
–70  
–80  
–90  
V
IN  
4.99k  
4.53k  
V
OUT  
+
LTC1065  
13k*  
1µF  
0.1µF  
5V  
0.1µF  
TANT  
200pF*  
*
SELF-CLOCKING SCHEME  
1065 TA01  
1
10  
100  
FREQUENCY (kHz)  
1065 TA02  
1

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