|
Details, datasheet, quote on part number:NJM2776
| |
Datasheet text preview:
NJM2776
Headphone Amplifier for Portable Audio
s GENERAL DESCRIPTION The NJM2776 is a low voltage headphone amplifier for portable audio applications. The NJM2776 operates directly for one battery supply with + + independent power supply terminals (V 1 and V 2). Also it provides shock-noise less standby mode. The NJM2776 is suitable for portable MD, portable CD and others. s PACKAGE OUTLINE
NJM2776RB2
s FEATURES q Operating Voltage
V 1(from step-up converter) =1.8 to 4.5V (however, V 1 > V 2) + + + V 2(from battery) =0.9 to 4.5V (however, V 1 > V 2) + + + q Low Operating Current ICC4(V 1 side)=200µA typ. (V 1=2.3V, V 2=1.2V, No signal) + + + ICC3(V 2 side)=350µA typ. (V 1=2.3V, V 2=1.2V, No signal) + + + q Supply Current in Standby mode ICC2(V 1 side)=25µA typ. (V 1=2.3V, V 2=1.2V) + + + ICC1(V 2 side)= 6µA typ. (V 1=2.3V, V 2=1.2V) q Output Power Exceeds PO=8.5mW typ. (RL=16, THD=10%) q Shock-noise less Standby mode q Bipolar Technology q Package Outline TVSP10
+
+
+
s PIN CONFIGURATION AND BLOCK DIAGRAM
V +2
1
10 GND
OUT 1
2
9
OUT 2
+
-
-
+
IN 1
3
8
IN 2
STANDBY TC
4
BIAS
7
STANDBY
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
V2 OUT1 IN1 STADBY_TC + V1 VREF STANDBY IN2 OUT2 GND
+
REG
V +1
5
VREF AMP
6
VREF
-1-
NJM2776
s ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD Operating Temperature range Topr Storage Temperature Range T stg RATINGS 5 (note) 320 -20 to +75 -40 to +125 UNIT V mW °C °C
s RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL TEST CONDITION + V1 Operating Voltage Range + V2
+ +
MIN. 1.8 0.9
TYP. 2.3 1.2
MAX. 4.5 4.5
UNIT
V
s ELECTRICAL CHARACTERISTICS (Ta=25°C, V 1=2.3V, V 2=1.2V, VIN=-30dBV (31.6mVrms), f=1kHz, RL=16, Active mode, unless otherwise specified) Power Supply TEST CONDITION PARAMETER SYMBOL MIN. TYP. MAX. UNIT pin + + Operating Current ICC0 V 1=0V V2 1.0 + ICC1 V2 6.0 10.0 Standby mode + µA ICC2 V1 25 35 + ICC3 V2 350 750 No signal + ICC4 V1 200 400 + ICC5 V2 2.5 PO=0.1mW +0.1mW mA + 200 V1 ICC6 Reference Voltage No signal 0.50 0.60 0.65 V VR E F Amplifier PARAMETER Closed loop Gain Output Power Total Harmonic Distortion Output Noise Voltage Channel Separation Mute Level Supply Voltage Rejection Ratio SYMBOL GV PO THD VNO CS MUTE PSRR1 PSRR2 Mode Control PARAMETER High Level Input Voltage Low Level Input Voltage Standby mode 1kHz Band Pass + V 1=1.8V + 0.1Vrms + V 2=0.9V + V 1=1.8V + V 2=0.9V + 0.1Vrms TEST CONDITION V I N = H i g h Level V I N = L o w Level TEST CONDITION THD=10% PO =1mW A-Weighted MIN. 10.0 5.0 44 46 70 TYP. 11.5 8.5 0.20 -100
(10.0)
MAX. 12.5 0.50 -96
(15.8)
UNIT dB mW % dBV
(µV)
55 -100 52 77
-80 -
dB dB
dB -
SYMBOL VIH VIL
MIN. 1.2 0.0
TYP. -
MAX. + V1 0.3
UNIT V
s MODE SWITHCH FUNCTION STANDBY (7PIN) PARAMETER CONTROL SIGNAL Standby L, open Active H
STATUS IC is non-active. IC is active.
-2-
NJM2776
s TERMINAL DESCRIPTION
PIN No.
SYMBOL
EQUIVALENT CIRCUIT
V+2
VOLTAGE
NOTE
2,9
OUT1, OUT2
5K VREF
15K O UT
0.6V
GND
V+1
3,8
IN1, IN2
IN 20K VREF GND
0.6V
V+1
4
STANDBY_TC
400
88k
680 STANDBY_TC
1.2V
GND
V+2
V+1
100
6
VREF
VREF
0.6V
GND
-3-
|
|
