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NJM2173V Datasheet

  • NJM2173V

  • LOW VOLTAGE MICROPHONE AMPLIFIER for PORTABLE AUDIO

  • 4頁

  • NJRC

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j
NJM2173A
LOW VOLTAGE MICROPHONE AMPLIFIER for PORTABLE AUDIO
s
GENERAL DESCRIPTION
The
NJM2173
is a low voltage microphone amplifier designed
for portable audio items.
It includes standby, two-type gain selector, and power ripple
rejection adjustment circuit. It realizes very low turn-noise at
standby mode.
It is suitable for portable Mini-Disc, portable Compact-Disc, and
other microphone amplifier application.
s
FEATURES
q
Operating Voltage Range
2.7 to 4.5V
+
q
Operating Current
2.2mA typ. at V =2.7V
q
Supply Current in Standby Mode
1碌A(chǔ) max.
q
Maximum Output Voltage
-1.5dBV typ. at THD=0.1%
q
Internal Two-type Gain Select Function 13dB typ./ 29dB typ.
q
Internal Standby Function
q
Power Ripple Rejection Terminal
95dB typ. at Gv=13dB
q
Bipolar Technology
q
Package Outline
SSOP14
s
PIN CONFIGURATION
1
2
3
4
5
6
7
14
13
12
11
10
9
8
s
PACKAGE OUTLINE
NJM2173V
PIN FUNCTION
+
1. OUT 1
8. V
9. STBY
2. DC CUT 1
10. Gv
3. IN 1
+
+
11. MIC V 2
4. MIC V 1
5. REG
12. IN 2
6. NOISE
13. DC CUT 2
7. GND
14. OUT 2
NJM2173V
s
BLOCK DIAGRAM
OUT1 1
AMP1
AMP2
14 O U T 2
13 D C C U T2
12 IN 2
11 M IC V
+
2
Gv
REG
DC CUT1 2
IN 1 3
M IC V
+
1 4
REG 5
N O IS E 6
GND 7
10 G v
9 STBY
8 V
+

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