TS488 Datasheet, PDF (1/32 Pages) STMicroelectronics – Pop-free 120mW stereo headphone amplifier

TS488-TS489
Pop-free 120mW stereo headphone amplifier
Features
■ Pop and click noise protection circuitry
■ Operating range from V_CC = 2.2V to 5.5V
■ Standby mode active low (TS488) or high (TS489)
■ Output power:
– 120mW @5V, into 16Ω with 0.1% THD+N
max (1kHz)
– 55mW @3.3V, into 16Ω with 0.1% THD+N
max (1kHz)
■ Low current consumption: 2.7mA max @5V
■ Ultra low standby current consumption: 10nA
typical
■ High signal-to-noise ratio
■ High crosstalk immunity: 102dB (F = 1kHz)
■ PSRR: 70dB typ. (F = 1kHz), inputs grounded
@5V
■ Unity-gain stable
■ Short-circuit protection circuitry
■ Available in lead-free MiniSO-8 & DFN8
2mm x 2mm
Description
The TS488/9 is an enhancement of TS486/7 that
eliminates pop and click noise and reduces the
number of external passive components.
The TS488/9 is a dual audio power amplifier
capable of driving, in single-ended mode, either a
16Ω or a 32Ω stereo headset.
Capable of descending to low voltages, it delivers
up to 31mW per channel (into 16Ω loads) of
continuous average power with 0.1% THD+N in
the audio bandwidth from a 2.5V power supply.
An externally-controlled standby mode reduces
the supply current to 10nA (typ.). The unity gain
stable TS488/9 is configured by external gain-
setting resistors.
TS488IST - MiniSO-8
OUT (1)
1
VIN (1)
2
BYPASS
3
GND
4
8
VCC
7
OUT (2)
6
VIN (2)
5 SHUTDOWN
TS488IQT - DFN8
Vcc 1
OUT (1) 2
VIN (1) 3
Bypass 4
8 OUT (2)
7 VIN (2)
6 Shutdown
5 GND
TS489IST - MiniSO-8
OUT (1)
1
VIN (1)
2
BYPASS
3
GND
4
8
VCC
7
OUT (2)
6
VIN (2)
5
SHUTDOWN
TS489IQT - DFN8
Vcc 1
OUT (1) 2
VIN (1) 3
Bypass 4
8 OUT (2)
7 VIN (2)
6 Shutdown
5 GND
Applications
■ Headphone amplifier
■ Mobile phone, PDA, computer motherboard
■ High-end TV, portable audio player
September 2006
Rev 4
1/32
www.st.com
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