qf4a512 ETC-unknow, qf4a512 Datasheet - Page 60

• Manufacturer Part Number: qf4a512
• Description: 4-channel Programmable Signal Converter Psc
• Manufacturer: ETC-unknow

13.3 AC coupled, Differential
Rev C5, Jan 07
Input
(10V AC)
PGA x2
CH 1
CH 2
CH 3
CH 4
J1
BNC
J2
BNC
J3
BNC
J4
BNC
1
1
1
1
C1
3.3uF
C2
3.3uF
C3
3.3uF
C4
3.3uF
C5
3.3uF
C6
3.3uF
C7
3.3uF
C8
3.3uF
R1
R2
R3
R4
R5
R6
90K 1%
R7
R8
90K 1%
90K 1%
90K 1%
90K 1%
90K 1%
90K 1%
90K 1%
Table 22. Example resistor values for ac-coupled, differential
Figure 16. Application Circuit – Differential, ac coupled
Input level
3.3V ptp
0.1uF
0603
10V ptp
1V ptp
5V ptp
1V8
3V3
C17
C9
QF4A512
0.1uF
0603
AC-coupled, differential
1
2
3
4
5
6
7
8
PRELIMINARY
A1N
A1P
A2N
A2P
A3N
A3P
A4N
A4P
U1
R1-R8 value
60
23k
40k
90k
0k
1V8
PGA setting
0.1 uF
C10
0603
x2
x2
x2
x2
1V8
DVDD33
DVDD18
XVDD18
DGND
XGND
RSTN
XOUT
C11
0.1 uF
0603
XIN
24
23
22
21
20
19
18
17
AC Coupled
Differential
RESET
SCLK
DIN
DOUT
DRDY
CS
1Meg
R9
1V8
X1
20.000 MHz
HCM49-20.000MABJT
www.quickfiltertech.com
C16
0.1uF
0603
3V3
C13
1
18 pF
0603
C15
TP1
0.1uF
0603
QF4A512
1V8
C12
C14
18 pF
0603
0.1uF
0603