CXA1691BM View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

Manufacturer

CXA1691BM

FM/AM Radio

Sony Semiconductor 

CXA1691BM/BS

No.

Symbol

19 (20) METER

20 (21) GND

21 (22) AFC/AGC

22 (23) AFC/AGC

23 (24) DET OUT

Voltage (V)

VCC=3 V VCC=6 V

FM AM FM AM

1.6 1.6 4.5 4.5

Equivalent circuit

1.25V

19

×3

N

GND

Description

Meter drive circuit

(For tuning indicator)

0000

1.25 1.49 1.25 1.49

22

1.25 1.25 1.25 1.25

1.25 1.0 1.25 1.0

33k 39k

23

AFC pin of W band.

During AM, it determines

time constant of AGC

AFC pin of J band.

21 During AM, it determines

time constant of AGC.

GND

Detection output pin

24 (25) AF IN

0000

11k

24

×4 ×4

82k

Power amplifier input pin

GND

RIPPLE

25 (26)

FILTER

2.71 2.71 5.4 5.4

25

VCC

17k

Ripple filter

73k

90k

26 (27) VCC

28

GND

(29, 30)

3.0 3.0 6.0 6.0

0000

Power supply pin

Power GND

∗ The pin voltage of pin 6 during AM, it is the same pin voltage of pin 22 (23) during J BAND and is the same

pin voltage of pin 21 (22) during W BAND.

—5—

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