LTC1063
12
1063fa
VIN*
–5V
R
5V
0.1
F
VOUT
1063 TA06
* IF THE INPUT VOLTAGE CAN EXCEED V+,
CONNECT A SIGNAL DIODE BETWEEN PIN 1 AND V+.
1
2
3
4
8
7
6
5
LTC1063
C
1
2
3
4
8
7
6
5
LTC1063
–5V
5V
0.1
F
0.1
F
0.1
F
VIN*
VOUT
VIN
V–
–7.5V
V+
7.5V
0.1
F
1
2
3
4
8
7
6
5
LTC1063
fCLK
0.1
F
7.5V
1
F
TANT
+
1063 TA05
VOUT
10k
2.5mV
LT1009
10k
*
* OPTIONAL, 1N4148
VIN*
–5V
R
5V
0.1
F
VOUT
1063 TA04
* IF THE INPUT VOLTAGE CAN EXCEED V+,
CONNECT A SIGNAL DIODE BETWEEN PIN 1 AND V+.
1
2
3
4
8
7
6
5
LTC1063
C
1
2
3
4
8
7
6
5
LTC1063
–5V
5V
0.1
F
0.1
F
0.1
F
fC (1/RC)(1/100)
WIDEBAND NOISE = 140
VRMS
ATTENUATION AT f = 2fC = 60dB
INPUT FREQUENCY (kHz)
0
(ms)
100
90
80
70
60
50
40
30
20
8
1063 F11
2
4
6
10
(A) LTC1063
BUTTERWORTH
1
35
79
(B) GROUP
DELAY
CORRECTED
VIN
5V
13k
5V
0.1
F
VOUT
1063 TA03
0.1
F
200pF
1
2
3
4
8
7
6
5
LTC1063
4.53k
+
4.99k
1
F
TANT
Group Delay
The group delay of the LTC1063 closely approximates the
delay of an ideal 5-pole Butterworth lowpass filter (Figure
11, Curve A). To linearize the group delay of the LTC1063
(Figure 11, Curve B), use an input resistor about six times
higher than the maximum value of RIN, shown in Table 1.
The passband response of the group delay corrected filter
approximates a 5-pole Bessel response while its transi-
tion band rolls off like a Butterworth.
Figure 11. Group Delay
Single 5V Supply Operation (fC = 3.4kHz)
Adjusting VOS(OUT) for
±7.5 Supply Operation
Sharing Clock for Multichannel Applications
Cascading Two LTC1063s for Steeper Roll-Off
APPLICATIO S I FOR ATIO
WU
UU
TYPICAL APPLICATIO S
U