NJM2761
Audio Limiter
■
GENERAL DESCRIPTION
The
NJM2761
is an audio limiter for speaker protection.
The limit level is adjustable by external resistor.
It is suitable for PC, potable audio and others.
■
PACKAGE OUTLINE
NJM2761RB2
MSOP10 (TVSP10)
NJM2761V
(SSOP14)
■
FEATURES
●
Wide Operating Voltage
●
Variable Limit Level by external resistor
●
Low Output Noise
●
Bipolar Technology
●
Package Outline
+2.7V to +13.0V
0.2 to1V
-90dBV max.
MSOP10 (TVSP10)*
SSOP14
*MEET JEDEC MO-187-DA / THIN TYPE
■
BLOCK DIAGRAM
Vcc
Vref
INa
OUTa
INb
OUTb
SW
INT
SENSE
-1-
NJM2761
■
ABSOLUTE MAXIMUM RATING
(Ta=25°C)
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
V
+
RATINGS
14
320(MSOP10 (TVSP10))
300(SSOP14)
-20 to +75
-40 to +125
UNIT
V
mW
°C
°C
P
D
T
opr
T
stg
■
ELECTRICAL CHARACTERISTICS
+
●
POWER SUPPLY
(Ta=25°C, V =5V unless otherwise specified)
PARAMETER
Operating Voltage
Operating Current
Reference Voltage
SYMBOL
V
+
TEST CONDITION
-
No Signal
No Signal
MIN.
2.7
-
2.2
TYP.
5.0
1.5
2.5
MAX.
13.0
2.0
2.7
UNIT
V
mA
V
I
CC
Vref
●
AC CHARACTERISTICS
+
(Ta=25°C, V =5V, V
IN
=1Vrms/f=1kHz, Rsense=20kΩ, BW=400-30kHz unless otherwise specified)
PARAMETER
Limit Level 1
Limit Level 2
Limit Off
Output Noise
Total Harmonic Distortion
Cross Talk
Ripple Rejection
SYMBOL
G
LIM1
G
LIM2
G
OFF
V
NO
THD+N
CT
RR
V
ripple
=100mVrms, f=1kHz
+
+
TEST CONDITION
MIN.
150
TYP.
200
1.0
1.0
-100
(10)
-
-
-
MAX.
250
1.3
1.1
-90
(31.6)
1
-70
-70
(316)
UNIT
mVrms
Vrms
Vrms
dBV
(µVrms)
%
dB
dBV
(µVrms)
V =13V,Rsense=4kΩ,V
IN
=2Vrms
SW=2V
R
S
=0Ω, A-weighting,
0.7
0.9
-
-
-
-
●
CONTROL CHARACTERISTICS
(Ta=25°C, V =5V unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Low Level Input Voltage
High Level Input Voltage
V
IL
V
IH
-
-
-
2.0
-
-
0.5
-
V
V
■
CONTROL TERMINAL EXPLANATION
SW(MSOP10 (TVSP10)):7pin, SSOP14:11pin)
MODE
Limiter ON
Limiter OFF
STATUS
L
H
Limiter is active.
Limiter is not active.
NOTE
-3-