FX631 Datasheet, PDF (3/9 Pages) CML Microcircuits – Low-Voltage SPM Detector

Application Information
External Components
V_DD
C₁
XTAL/CLOCK
XTAL/CLOCK
X₁
1
For use with a Clock Pulse input
- Remove Xtal (X₁)
XTAL
2
- Connect Pin 1 to V_DD
- Remove link (Pins 3/4)
- Input clock pulses to CLOCK IN
CLOCK OUT
3
V_SS
16
V_DD
SYSTEM
15
PACKET MODE OUTPUT
14
CLOCK IN
CLOCK IN
TONE FOLLOWER OUTPUT
4
13
FX631DW
5
6
V_BIAS
7
V_{SS 8}
12
AMP OUT
11
SIGNAL IN (-)
10
SIGNAL IN (+)
9
R₄
R₁
C₃
R₂
R₃
C₄
C₂
V_SS
Fig.2 Recommended External Components - Differential Input Mode
Component
R₁
R₂
R₃
R₄
C₁
C
2
C
3
C₄
X₁
Value
R_FEEDBACK
R_{IN (-)}
R_{IN (+)}
R_BIAS
1.0µF ±20%
1.0µF ±20%
C
IN (-)
C_{IN (+)}
3.579545MHz
External Components
1. The values of the Input Amp gain components
illustrated are calculated using the Input Gain
Calculation Graphs (Figures 4 and 5).
Whilst calculating input gain components, for
correct operation, it is recommended that the values
of resistors R₁ and R₄ are always greater than, or
equal to, 33kΩ.
2. Refer to following pages for advice on Microcircuit
Protection from high and spurious line voltages.
Differential Input
Tip (a)
Ring (b)
INPUT AMP
-
+
Common Mode Input
INPUT AMP
-
+
V_BIAS
V_BIAS
V_SS
Fig.3 Example Input Configurations
V_SS
3