LTC1068IG Linear Technology, LTC1068IG Datasheet - Page 19

• Manufacturer Part Number: LTC1068IG
• Description: IC FILTR BUILDNG BLK QUAD 28SSOP
• Manufacturer: Linear Technology

Specifications of LTC1068IG

• Filter Type: Universal Switched Capacitor
• Frequency - Cutoff Or Center: 50kHz
• Number Of Filters: 4
• Max-order: 8th
• Voltage - Supply: 3.14 V ~ 11 V, ±3.14 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1µF
TYPICAL APPLICATIONS
3.3V
V
IN
LTC1068-50 8th Order Linear Phase Lowpass, f
for Single Supply Low Power Applications. Maximum f
22.6k
R11
20kHz with a 3.3V Supply and 40kHz with a 5V Supply
R43 48.7k
R33 12.7k
R23 10.7k
R21 20.5k
R41 22.6k
26.7k
R31 10k
R
L3
0.1µF
FilterCAD Custom Inputs for f
10
11
12
13
14
2nd ORDER SECTION
1
2
3
4
5
6
7
8
9
INV B
HPB/NB
BPB
LPB
SB
NC
AGND
V
NC
SA
LPA
BPA
HPA/NA
INV A
+
LTC1068-50
R
56.2k
13.3k
B3
D
B
C
A
R
R
A1
B1
24.9k
U
HPD/ND
HPC/NC
INV C
INV D
BPD
BPC
LPD
LPC
CLK
SC
V
NC
NC
SD
–
28
27
26
25
24
23
22
21
20
19
18
17
16
15
11.0472
11.0441
f
9.5241
6.9687
O
(kHz)
C
R44 34.8k
R34 14.3k
R24 16.9k
= 10kHz
CUTOFF
R22 43.2k
R32 43.2k
R42 196k
9.09k
R
R
34k
0.5248
1.1258
1.3392
0.6082
H2
L2
= f
CUTOFF
Q
CLK
1068 TA11
/50
is
21.7724
f
N
500kHz
V
(kHz)
OUT
0.5248
1.5781
Q
N
–10
–20
– 40
– 50
– 60
–70
– 80
–30
10
0
1
LPBP
TYPE
LPN
AP
LP
GROUP
DELAY
Gain and Group Delay
GAIN
LTC1068 Series
MODE
vs Frequency
FREQUENCY (kHz)
4a3
2n
2s
3
10
1068 TA12
19
100
150
140
130
120
110
100
90
80
70
60
1068fb