LTC1064_09 Datasheet, PDF (13/20 Pages) Linear Technology – Low Noise, Fast, Quad Universal Filter Building Block

TYPICAL APPLICATIO S
5V TO 8V
V_IN
8th Order Chebyshev Lowpass Filter with a Passband
Ripple of 0.1dB and Cutoff Frequency up to 100kHz
R13
R22
R32
R12
R42
1 _{INV B}
INV C ²⁴
2 _{HPB/NB HPC/NC} 23
R23
3 _BPB
BPC ²²
R33
4 _LPB
LPC ²¹
R43
5 _SB
SC ²⁰
R14
6 _AGND
V^{– 19}
–5V TO –8V
7 _V+ ^LTC1064 _CLK 18
f_CLK = 5MHz
0.1µF
8 _SA
50/100 ¹⁷
5V TO 8V
R41
9 _LPA
LPD ¹⁶
R44
R31
10 _BPA
BPD ¹⁵
R34
R21
11 _HPA/NA
HPD ¹⁴
R24
R11
12 _{INV A}
INV D ¹³
RESISTOR VALUES:
R11 = 100.86k R21 = 16.75k
R12 = 25.72k R22 = 20.93k
R13 = 16.61k R23 = 10.18k
R14 = 13.84k R24 = 11.52k
R31 = 23.6k
R32 = 45.2k
R33 = 68.15k
R34 = 17.72k
R41 = 99.73k
R42 = 25.52k
R43 = 99.83k
R44 = 25.42k
FOR f_CLK > 3MHz, ADD C2 = 10pF ACROSS R42
C3 = 10pF ACROSS R43
C4 = 10pF ACROSS R44
WIDEBAND NOISE = 170µV_RMS
0.1µF
V_OUT
1064 TA11
LTC1064
Amplitude Response
15
0
– 15
–30
–45
–60
–75
V_S = ±8V
–90 f_CLK = 5MHz
PASSBAND RIPPLE = 0.1dB
–105
10k
100k
INPUT FREQUENCY (Hz)
1M
1064 TA12
1064fb
13