AK2124 Datasheet, PDF (3/6 Pages) List of Unclassifed Manufacturers – Receiver/Demodulator for time code signals transmitted by the transmitters

Pinning
Pins 8 and 13 of the SOP 20 package are not connected.
Pad
Pin
01
01
02
02
03
03
04
04
05
05
06
06
07
07
08
09
09
10
10
11
11
12
12
14
13
15
14
16
15
17
16
18
17
19
18
20
Symbol
A2
A1
GND
E2
E1
CK
SR
V_CC
A
KS
CR
PON
CD
AP2
REF
E3
SA
AP1
Pin designation
RF - output 2
RF - output 1
Ground
Antenna input 2
Antenna input 1
Compensation capacity
Switch controller
Supply voltage
Output
Comparator threshold
Charging capacitor (for control amplifier)
Stand - by switch
Demodulation capacity
Operating point regulator 2
Reference voltage
Booster amplifier input
Antenna change-over switch
Operating point regulator 1
Block Diagram and Application Circuit
47 n
20 AP1
5 E1
A
4 E2
B
47 n
17 REF
V
CC _E2
E1 ^{19 SA}
a
GND
3
77.5 kHz
2
A1
330 k
1p
1 18
A2 E3
150 n
16
AP2
V2
-
V3 D
22 n
15
CD
680
100 µ
12
CR
CONTROL AMPLIFIER
VCC
SR 7
I
R1
I
R2
100 k
AK 2124
REFERENCE
CURRENT SOURCE
COMPARATOR
V
R
100 k
A 10
A
PON
14
OFF
ON
VCC
CK
V
CC
KS
6
9V
11
CC
100 p
10 µ
2
09/00
AK2124