Low Current Consumption Headphone Amplifier
TA2131FN
TOSHIBA Bipolar Linear IC Silicon Monolithic
TA2131FN
Low Current Consumption Headphone Amplifier for Portable...
Description
TA2131FN
TOSHIBA Bipolar Linear IC Silicon Monolithic
TA2131FN
Low Current Consumption Headphone Amplifier for Portable MD Player (With Bass Boost
www.datasheet4u.com Function)
The TA2131FN is a low current consumption headphone amplifier developed for portable digital audio. It is particularly well suited to portable MD players that are driven by a single dry cell. It also features a built-in bass boost function with AGC, and is capable of bass amplification of DAC output and analog signals such as tuner.
Features
· · · · · · · · · Low current consumption: ICCQ (VCC1) = 0.55 mA (typ.) ICCQ (VCC2) = 0.20 mA (typ.) Output power: Po = 8 mW (typ.) (VCC1 = 2.8 V, VCC2 = 1.2 V, f = 1 kHz, THD = 10%, RL = 16 Ω) Low noise: Vno = −102dBV (typ.) Built-in low-pass boost (with AGC) I/O pin for beep sound Outstanding ripple rejection ratio Built-in power mute Built-in power ON/OFF switch Operating supply voltage range (Ta = 25°C): VCC1 = 1.8~4.5 V VCC2 = 0.9~4.5 V Weight: 0.14 g (typ.)
1
2002-04-19
TA2131FN
Block Diagram
BEEP OFF
www.datasheet4u.com
Vref
Vref
VCC1
VCC1
DAC OUT (2.8 V)
ON Vref IN 22 Vref BST BEEP GND IN SW 21 20 19 18
OFF ON OFF ON
BST NF1
LPF1 24 23
Vref
MT SW 17
PW SW 16 PW SW
MT TC
VCC1 15 14
INB 13
Vref
BEEP BOOST MUTE SW SW
BST1
BST2
BST AGC
PW B
PW A
LPF2
1
BST NF2
2
BST OUT
3
AGC IN
4
DET
5
OUTB
6
PWR GND
7
OUTA
8
VCC2
9
BEEP OUTA
10
BEEP OUTB
11
INA
12 Vref
RL Vref Vref
RL +B (1.2 V) DAC OUT
2
2002-04-19
TA2...
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