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Sony Semiconductor Electronic Components Datasheet

CXA2500M Datasheet

Dual REC/PB Preamplifier

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Dual REC/PB Preamplifier
CXA2500M/N
Description
The CXA2500M/N is a dual recording/playback pre-
amplifier system bipolar IC which has been developed
for the low voltage operating cassette tape recorder.
CXA2500M
24 pin SOP (Plastic)
CXA2500N
24 pin SSOP (Plastic)
Features
Low quiescent current (VCC = 2V)
PB: ICC = 3.2mA (typ.)
REC: ICC = 5.2mA (typ.)
Very few external parts
Built-in Metal/Normal selection switch
Small switching noise due to internal transient
muting
Applications
3V headphone radio cassette recorders
Structure
Bipolar silicon monolithic IC
Bock Diagram
Absolute Maximum Ratings (Ta = 25°C)
Supply voltage
VCC
7
V
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –65 to +150 °C
Allowable power dissipation PD
CXA2500M
600 mW
CXA2500N
470 mW
Operating Conditions
Supply voltage PB
REC
VCC
VCC
1.2 to 3.5
1.6 to 3.5
V
V
24 23 22 21 20 19
MIC GCA
AGC
PB
AMP
MIC
6dB
12
GCA
22dB
3
AMP
12dB
PB
45
6
18 17 16 15 14 13
LINE
REC
PB/
REC
REF
AGC
DET
NORM/
METAL
LINE
–0.3dB
78
REC
20.5dB
9 10
TAPE/
TUNER
11 12
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E94806B8Y


Sony Semiconductor Electronic Components Datasheet

CXA2500M Datasheet

Dual REC/PB Preamplifier

No Preview Available !

Pin Description
No. Symbol
Voltage
(Typ.)
Equivalent circuit
VCC
CXA2500M/N
Pin voltage is during VCC = 2V
Description
2 MIC IN (A)
23 MIC IN (B)
0.93V
510
2
23
10k
20k
20k
Vref
VCC
MIC preamplifier input
3 PB PRE IN (A)
22 PB PRE IN (B)
0.93V
22
3
510
Vref PB preamplifier input
4 PB-NF (A)
21 PB-NF (B)
0.93V
510
Vref
5 PB OUT (A)
20 PB OUT (B)
0.93V
VCC
510
21
4
PB equalizer circuit negative
feedback
VCC
20 PB preamplifier output
5
6 PB EQ SW (A)
19 PB EQ SW (B)
0.93V
VCC
19 PB equalizer switch
6
–2–


Part Number CXA2500M
Description Dual REC/PB Preamplifier
Maker Sony Corporation
Total Page 11 Pages
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