LTC1164-8(RevA) 查看數據表（PDF） - Linear Technology
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LTC1164-8
(Rev.:RevA)
(Rev.:RevA)
Linear Technology
LTC1164-8 Datasheet PDF : 12 Pages
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LTC1164-8
TYPICAL APPLICATION
Tone Detector — Detecting a Low Level Signal Buried in Wideband Noise
fCLK
1
14
RIN
2
VIN
13
3
12
5V
0.1µF
+
1µF
4 LTC1164-8 11
5
10
6
9
7
8
5V
30.1k
AGND (2V)
CF
RF
61.9k
–
1/2 LT1413
+
4
C1 R1
10k
5V
R2
10k
5V
0.1µF
–8
1/2 LT1413
+
REF1
1.9V
18
1 STROBE
LTC1040
5+
6–
7 + COMP1
8–
0.1µF
4
0.1µF 1k
FOR OPTIMUM TONE DETECTION, THE SIGNAL’S FREQUENCY SHOULD BE IN THE
REF1 (1.9V) FILTER’S PASSBAND AND WITHIN ±0.1% FROM fCENTER.
AT VOUT, LOGIC HIGH = SIGNAL AT VIN, LOGIC LOW = NO SIGNAL AT VIN.
0.1µF 8.87k
THE MINIMUM DETECTABLE SIGNAL AT VIN: VIN(MIN) = 200mVRMS/GAIN.
THE MAXIMUM NOISE SPECTRAL DENSITY AT VIN: VIN = 32mVRMS/[GAIN • √(BW)f] R3
REF2 (1V)
WHERE:(BW) f = 0.01 • fCENTER AND IS THE NOISE EQUIVALENT BANDWIDTH
10k
OF THE FILTER
0.1µF 10k
GAIN = 340k/R IN AND IS THE FILTER GAIN AT fCENTER
RIN = 340k/GAIN; fCENTER = fCLK/100; 1/(2π • RF • CF) ≥ 10 • fCENTER
1/(2π • R1 • C1) ≤ fCENTER/10; 1/(2π • R3 • C2) ≤ fCENTER/32
14
C2
REF2
1V
13
12
11
+
–
+ COMP2
–
15
VOUT
LTC1164-8 • TA04
RELATED PARTS
PART NUMBER
LTC1064
DESCRIPTION
Universal Filter Building Block
LTC1164
Universal Filter Building Block
LTC1264
Universal Filter Building Block
See Table 4 for additional information
COMMENTS
This Part, with External Resistors, Allows Design of Bandpass Filters Similar to
LTC1164-8 (Up to 50kHz)
This Part, with External Resistors, Allows Design of Bandpass Filters Similar to
LTC1164-8 (Low Power Up to 20kHz)
This Part, with External Resistors, Allows Design of Bandpass Filters Similar to
LTC1164-8 (Up to 100kHz)
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417q (408)432-1900
FAX: (408) 434-0507qTELEX: 499-3977q www.linear-tech.com
11648fa LT/TP 1297 REV A 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1995
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