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PDF TA2120FN Data sheet ( Hoja de datos )
| Número de pieza | TA2120FN | |
| Descripción | LOW CONSUMPTION CURRENT STEREO GEADPHONE POWER AMPLIFIER FOR PORTABLE CD (3V USE) | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit SIlicon Monolithic
TA2120FN
TA2120FN
Low Consumption Current Stereo Headphone Power Amplifier for Portable CD (3V Use)
The TA2120FN is a low consumption current stereo headphone
power amplifier developed for portable CD players (3V). This IC
has active bass boost, output limiter, input pin for beep sound.
Features
· Low consumption current: ICCQ = 1.9 mA (C-CUP) (typ.)
ICCQ = 2.6 mA (OCL) (typ.)
· Two kinds of gain mode available: GV = 16dB or 8.5dB
· Output power (VCC = 2.0 V, f = 1 kHz, THD = 10%, RL = 16 Ω)
Po = 8 mW (typ.)
· Low noise: Vno = −98dBV (typ.)
Weight: 0.14 g (typ.)
· Built-in the center amplifier ON/OFF function.
(Favorable for low dissipation current in the C-Couple output configuration)
· Built-in active bass boost system
· Built-in output limiter function
· Input pin for beep sound
· Excellent ripple rejection ratio
· Built-in capacitor for reducing buzz noise
· Built-in power mute
· Built-in a power on/off switch
· Operating supply voltage range (Ta = 25°C): VCC = 1.8~4.5 V
1 2002-04-19
1 page  
Terminal
No. Name
Function
11 ALC IN
Input terminal for ALC
detector circuit
12 ALC DET
Smoothing for ALC
detection, ALC on/off
switchover
GND: ALC off
OPEN: ALC on
Internal Circuit
BIAS
11
´4 ´7
BIAS
TA2120FN
Terminal
Voltage
(V)
0.85
12 ¾
13 ATT SW
Power amplifier gain
switchover
OPEN/VCC:
ATT off (GV = 16dB)
GND:
ATT on (GV = 8.5dB)
16 GND
GND of input stage in
power amplifier
17 BEEP IN
Input terminal for Beep
sound
It receive beep sound
from microcomputer.
And power amplifier
outputs this beep sound.
5
20 kW
13
¾
10 kW
17
¾
OUTA
OUTB
0
0
18 MT TC
Terminal of mute
smoothing
Smoothing for shock
noise at power muting
switch over
18
1.4
5 2002-04-19
5 Page 
Application Circuit 1 (C-Couple mode)
TA2120FN
BIAS
BST
SW
OFF
ON
VCC VCC
ON PW ON MT
OFF SWOFF SW
24 23 22 21 20 19 18
BST BST BIAS BIAS PW MT MT
OUT SW
IN
SW SW TC
BEEP
DAC
OUT
Vol: 10 kW
ON
OFF ATT
SW
17 16 15 14 13
BEEP GND INB INA ATT
IN SW
TA2120FN
BST
NF
1
ADD
OUT
2
BIAS BIAS
RF PW-C
IN SW
34
C-CUP
VCC
5
OUTB
6
OUTC OUTA
78
PWR
GND
9
MIX
OUT
10
VCC VCC
RL
RL
ALC
IN
11
ALC
DET
12
ALC
SW ON
OFF
*: Monolithic ceramic capacitor
PWR AMP GAIN
ATT ON: GV = 8.5dB
ATT OFF: GV = 16dB
11 2002-04-19
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TA2120FN.PDF ] | |
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