LTC1064_09 Datasheet, PDF (20/20 Pages) Linear Technology – Low Noise, Fast, Quad Universal Filter Building Block

LTC1064
TYPICAL APPLICATIO S
Clock-Tunable, 30kHz to 90kHz 8th Order Notch Filter
Providing Notch Depth in Excess of 60dB
R13
C2
R14
8V
R11
V_IN1
R22
R32
R42
C1
0.1µF
R12
R31
R21
1 _{INV B}
INV C ²⁴
2 _{HPB/NB HPC/NC} 23
3 _BPB
BPC ²²
4 _LPB
LPC ²¹
5 _SB
SC ²⁰
6 _AGND
V^{– 19}
7 _V+ ^LTC1064 _CLK 18
8 _SA
50/100 ¹⁷
9 _LPA
LPD ¹⁶
10 _BPA
BPD ¹⁵
11 _HPA/NA
HPD ¹⁴
12 _{INV A}
INV D ¹³
R23
R33
–8V
C3
R44
R34
R24
R_L4
0.1%
RESISTOR VALUES:
R11 = 50k R21 = 5k
R12 = 15.4k R22 = 10k
R13 = 10k R23 = 10k
R14 = 9.09k R24 = 10k
R31 = 50k
R32 = 88.7k
R33 = 100k
R34 = 63.4k
R42 = 48.7k
R44 = 12.4k
R_H4
0.1%
R_G = 68.1k
R_L4 = 10k (0.1%)
R_H4 = 10k (0.1%)
0.1µF
f_CLK ≤ 5MHz
C1 = C2 = C3 = 15pF
THE NOTCH DEPTH FROM
5kHz TO 30kHz IS 50dB
WIDEBAND NOISE = 300µV_RMS
R_G
–
LT1056
+
V_OUT
1064 TA21
Amplitude Response
10
0
BW
–10
–20
–30
–40
–50
–60
–70
–80
–90 _{VS = ±8V}
–100 f_CLK = 4MHz
–110
10 20 30 40 50 60 70
INPUT FREQUENCY (kHz)
1064 TA22
RELATED PARTS
PART NUMBER
LTC1061
LTC1068 Series
LTC1164
LTC1264
DESCRIPTION
Triple Universal Filter Building Block
Quad Universal Building Blocks
Low Power, Quad Universal Filter Building Block
High Speed, Quad Universal Building Block
COMMENT
Three Filter Building Blocks in a 20-Pin Package
f_CLK:f_O = 25:1, 50:1, 100:1 and 200:1
Low Noise, Low Power Pin-for-Pin LTC1064 Compatible
Up to 250kHz Center Frequency
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
1064fb
LT/LT 0905 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1989