JRC NJM2173V Datasheet

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NJM2173A

LOW VOLTAGE MICROPHONE AMPLIFIER for PORTABLE AUDIO

GENERAL DESCRIPTION

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NJM2173

The
for portable audio items.
It includes standby, two-type gain selector, and power ripple
rejection adjus tm ent circ uit. It realizes ver y low turn-noise a t
standby mode.
It is suitable for portable Mini-Disc, portable Compact-Disc, and

FEATURES

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●

Operating Voltage Range 2.7 to 4.5V

●

Operating Current 2.2mA typ. at V

●

Supply Current in Standby Mode 1µA max.

●

Maximum Output Voltage -1.5dBV typ. at THD=0.1%

●

Internal Two-type Gain Select Function 13dB typ./ 29dB typ.

●

Internal Standby Function

●

Power Ripple Rejection Terminal 95dB typ. at Gv=13dB

●

Bipolar Technology

●

Package Outline SSOP14

PIN CONFIGURATION

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BLOCK DIAGRAM

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is a low volta ge microphone amplifier designed

1

2

3

4

5

6

7

14

13

12

11

10

9

8

PIN FUNCTION

1. OUT 1

2. DC CUT 1

3. IN 1

4. MIC V

+

1

5. REG

6. NOISE

7. GND

NJM2173V

+

=2.7V

8. V

9. STBY

10. Gv

11. MIC V

12. IN 2

13. DC CUT 2

14. OUT 2

PACKAGE OUTLINE

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+

NJM2173V

+

2

OUT1

C CUT1

IN 1

MIC V

REG

NOISE

GND

1

AMP1

AMP2

2
3

+

4

1

5

6

REG

Gv

7

OUT2

14

DC CUT2

13
12

IN 2

MIC V+2

11

10 Gv

9STBY

+

8V

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ABSOLUTE MAXIMUM RATINGS

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NJM2173A

(Ta=25°C)

PARAMETER SYMBOL RATINGS UNIT

Supply Voltage V
Maximum Input Voltage V
Power Dissipation P
Operating Temperature Range Topr -20 to +75
Storage Temperature Range Tstg -40 to +125

+

IN

D

(3,12pin) -0.3 to V

5V

+0.3 V

REG

300 mW

°

C

°

C

ELECRRICAL CHARACTERISTICS

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+

( V

=2.7V, Gv=13dB, VIN=-40dBV, RL=9kΩ, f=1kHz, Ta=25°C)

PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT

Operating Voltage Range V
Operating Current 1 ICC1 Standby On:STBY= V

Operating Current 2 ICC2
Output Voltage V

+

O

2.7 - 4.5 V

+

G

=29dB,No Signal,Standby Off

V

:STBY=GND

--1.0

-2.22.8mA

No Signal 1.28 1.35 1.42 V
Voltage Gain 1 GV1 10pin=L 12 13 14 dB
Voltage Gain 2 GV2 10pin=H 28 29 30 dB
Maximum Output Voltage V

Total Harmonic Distortion

Output Noise Voltage

Channel Separation

Supply Voltage Rejection
Ratio

Microphone Regulator
Output Voltage

High Level Input Voltage G V
Low Level Input Voltage G V
High Level Input Voltage S V
Low Level Input Voltage S V

OM

THD1 VO=-28.2dBV - 0.013 0.026 %
THD2 G

VNO1
V

2

NO

CS1
CS2
SVR1

SVR2
V

REG

IHG
ILG
HIS
ILS

THD=0.1% -2.7 -1.5 - dBV

=29dB, VO=-28.2dBV - 0.05 0.1 %

V

Rg=600Ω, A-Weighted

Rg=600Ω, A-Weighted, G

Rg=600Ω, V

Rg=600Ω, V

+

V

=3V, ∆V+=-20dBV, Rg=600

+

=3V, ∆V+=-20dBV, Rg=600

V

=29dB

G

V

RL=3.55k

=-18dBV

IN

=-34dBV, Gv=29dB

IN

Ω

=29dB

V

Ω
Ω

-

-

- 105 - dB

80 90 - dB

-95-dB

70 80 - dB

2.3 2.42 2.54 V

-105

(5.63)

-95

(17.8)

Gv Termial 2.0 - V

-100
(10)

-90

(32)

+

(µVrms)
(µVrms)

Gv Terminal 0 - 0.5 V
STBY Terminal V+-0.5 - V

+

STBYTerminal 0 - V+-2.0 V

CONTROL TERMINAL EXPLANATION

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STBY (9Pin)

●●●●

PARAMETER CONTROL SIGNAL STATUS

STANDBY OFF L
STANDBY ON H

IC is active.
IC is non-active.

Gv (10Pin)

●●●●

PARAMETER CONTROL SIGNAL STATUS

Gv1 L
Gv2 H

IC set up 13dB typ. voltage gain.
IC set up 29dB typ. voltage gain.

µ

A

dBV
dBV

V

V