|
Details, datasheet, quote on part number:NJM2777D
| |
Datasheet text preview:
PRELIMINARY
NJM2777
Headphone Amplifier with Electronic Volume
I GENERAL DESCRIPTION NJM2777 is a headphone amplifier with electronic volume. It includes widely gain adjustable volume, +20 to 80 dB, and mute function. These are controlled by DC voltage. The NJM2777 is suitable for headphone output on TV set. I FEATURES G Operating Voltage G Electronic Volume G Mute Function G Bipolar G Package Outline I BLOCK DIAGRAM CNTa CAPa
Mute
I PACKAGE OUTLINE
NJM2777D
NJM2777M
NJM2777V
8 to 10 V +20dB to -80dB DIP14, DMP14, SSOP14
Mute
IN a
VOL
OUTa
IN b
VOL
OUT b
Bias
Vref
CNTb CAPb I PIN FUNCTION
No. 1 1 14 2 3 4 5 7 8 6 7
SYMBOL
V+ GND
V+ OUTb CNTb CAPb INb Mute N.C.
FUNCTION Power Supply Bch Output Bch Volume control voltage input Bch Volume control click noise absorbing capacitor connect terminal Bch Input Mute control No connecting
No. 8 9 10 11 12 13 14
SYMBOL
N.C. Vref INa CAPa CNTa OUTa GND
FUNCTION No connecting Reference voltage stabilized capacitor connect terminal Ach Input Ach Volume control click noise absorbing capacitor connect terminal Ach Volume control voltage input Ach Output Ground
1
NJM2777
PRELIMINARY
I ABSOLUTE MAXIMUM RATING (Ta=25°C) ° PARAMETER SYMBOL Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range V
+
RATING 12 DIP14 : 500 DMP14 : 500* SSOP14 : 440* -20 to +75 -40 to +125
UNIT V mW °C °C
PD Topr Tstg
I ELECTRICAL CHARACTERISTICS
+
*(Note) EIA/JEDEC STANDARD Test board(76.2 x 114.3 x 1.6mm, 2layers, FR-4)mounting
(V =9V, VIN=-20dBV, f=1kHz, RL=100, Gv=0dB,"Mute" terminal =L, Ta=25°C) GPOWER SUPPLY
PARAMETER Operating Voltage Operating Current Reference Voltage
GAMPLIFIER
SYMBOL V
+
TEST CONDITION No Signal
MIN. 8 4
TYP. 9 5
4.1
MAX. 10 8
4.2
UNIT V mA
V
IC C VREF SYMBOL GEVR Gv VIM PO THD CS Mute VNO1 VNO2 PSRR SYMBOL
V IH V IL
PARAMETER Volume Operating Range Voltage Gain Channel Balance Maximum Input Voltage Output Power Total Harmonic Distortion Channel Separation Mute Level Output Noise Voltage 1 Output Noise Voltage 2 Power Supply Ripple Rejection
GCONTROL
TEST CONDITION
VCNTa, VCNTb = 0 to 3.3V
Gv=-10dB
MIN. 80 -1.5 8.9 (2.8) 70 70 MIN.
2 0
TYP. 100 0 9.5 (3.0) 100 0.1 80 -85 -95 (18) -105 (5.6) 70 TYP.
-
MAX. 1.5 1 -75 -85 (56) -95 (18) MAX.
V
+
UNIT dB dB dBV (Vrms) mW % dB dB dBV
(µVrms)
THD=3%
Gv=10dB, THD=10%
Rg=600, Vin = 0dBV "Mute" terminal=H, Vin = 0dBV Rg=0, A-Weighted "Mute" terminal =H Rg=0, A-Weighted Vripple=-20dBV Rg=0
dBV
(µVrms)
dB UNIT
V V
PARAMETER
High Level Input Voltage Low Level Input Voltage
TEST CONDITION
0.4
I CONTROL TERMINAL
Operating Condition Mute Active
Operating Condition Control Terminal Mute Terminal
Description Mute the signal Output the signal
H L, OPEN
2
PRELIMINARY
NJM2777
I TEST CIRCUIT TEST CIRCUIT1 (THD, GEVR, VIM, PO) Input B CNT B Output B
100 0.47µF 1µF VCNTB 100µF
V+
[THD] BPF:400 to 30KHz [GEVR] BPF:1KHz
7 N.C.
6 Mute
5 INb
4
3
2
1 V+
10µF
CAPb CNTb OUTb
VOL
VOL Bias
N.C. 8
Vref 9
10µF
INa 10
CAPa CNTa OUTa GND 11 12 13
100µF
14
0.47µF 1µF
Output A
VCNTA 100 [THD] BPF:400 to 30KHz [GEVR] BPF:1KHz
Input A
CNT A
Volume Range : GEVR= 20 log
Vo max Vo min
Vomin : Output voltage at VCNT=0V Vomax : Output voltage at VCNT=3.3V
3
|
|
