FX641(1997) 查看數據表（PDF） - CML Microsystems Plc
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FX641 Datasheet PDF : 12 Pages
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Application Information
VDD
XTAL/CLOCK
XTAL/CLOCK
For use with a Clock Pulse input
X1
- Remove Xtal (X1)
- Connect Pin 1 to VDD
- Remove link (Pins 3/4)
- Input clock pulses to CLOCK IN
XTAL
OUT
See Figure 4
CLOCK
CLOCK IN
IN
OUTPUT ENABLE
Ch2 OUTPUT
Ch1 OUTPUT
C3
C4
VBIAS
Ch1 AMP OUT
Ch1 AMP IN (-)
R2
R1
Ch1 AMP IN (+)
R3
V SS
R4
1
24
2
23
3
22
4
21
5
20
6
19
FX641D2
7
18
8
17
9
16
10
15
11
14
12
13
C2
R8
Component
R
1
R2
R
3
R4
R
5
R6
R
7
R
8
Value
68kΩ
68kΩ
750kΩ
750kΩ
68kΩ
68kΩ
750kΩ
750kΩ
Tolerance
± 1%
±1%
±1%
±1%
± 1%
± 1%
±1%
±1%
Fig.2 Recommended External Components
V SS
C
1
C2
C
3
C4
C
5
C6
X1
VDD
C1
V SS
SYSTEM SELECT
SERIAL DATA
SERIAL CLOCK
CHIP SELECT
PRESET LEVEL
OUTPUT SELECT
R7 Ch2 AMP OUT
Ch2 AMP IN (-) C5
R6
R5
Ch2 AMP IN (+) C6
1.0µF
1.0µF
270pF
270pF
270pF
270pF
3.579545MHz
±20%
±20%
±5%
±5%
±5%
±5%
Fixed Sensitivity Setting
Note that when calculating/selecting gain components, R , R , R and R should always be greater than or equal to
34 7
8
100kΩ.
Differential Input
Tip (a)
Ring (b)
INPUT AMP
-
+
FX641 (part)
VBIAS
VSS
Fig.3 Example Input Configurations
Common Mode Input
INPUT AMP
-
+
FX641 (part)
VBIAS
VSS
4.4
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