Pinning
SOP 14 - package
Pin
01
02
03
04
05
06
07
08
09
10
11
12
13
14
Symbol
A2
A1
M
E1
CK
V
CC
A
CR
PON
CD
AP2
REF
E3
AP1
Pin designation
RF output 2
RF output 1
Ground
Antenna input
Compensation capacity
Supply voltage
Output
Charging capacitor (for control amplifier)
Stand by switch
Demodulation capacity
Operating point regulator 2
Reference voltage
Booster amplifier input
Operating point regulator 1
Block Diagram and Application Circiut
77.5 kHz
330 k
680
1p
150 n
11
AP2
22 n
10
CD
100
µ
8
CR
47 n
2
A1
14
4
AP1
E1
1
A2
13
E3
A
a
V2
-
V3
D
CONTROL AMPLIFIER
I
R1
I
R2
100 k
V
R
100 k
47 n
12
REF
REFERENCE
CURRENT SOURCE
COMPARATOR
A
7
A
AK 2125
GND
3
OFF
V
CC
PON
9
ON
CK
5
100 p
V
CC
6
V
CC
10
µ
2
09/00
AK2125
GSG [ GUNTER SENICONDUCTOR GMBH. ]
