TS4909 datasheet(1/32 Pages) STMICROELECTRONICS

部件名	TS4909

功能描述	Dual mode low power 150mW stereo headphone amplifier with capacitor-less and single-ended outputs

PDF	32 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 32 page

September 2007

Rev 8

1/32

32

TS4909

Dual mode low power 150mW stereo headphone amplifier

with capacitor-less and single-ended outputs

Features

■ No output coupling capacitors necessary

■ Pop-and-click noise reduction circuitry

■ Operating from VCC = 2.2V to 5.5V

■ Standby mode active low

■ Output power:

– 158mW @5V, into 16

Ω with 1% THD+N

max (1kHz)

– 52mW @3.0V into 16

Ω with 1% THD+N

max (1kHz)

■ Ultra low current consumption: 2.0mA typ.@3V

■ Ultra low standby consumption: 10nA typ.

■ High signal-to-noise ratio: 105 dB typ.@5V

■ High crosstalk immunity: 110dB (F=1kHz) for

single-ended outputs

■ PSRR: 72dB (F=1kHz), inputs grounded, for

phantom ground outputs

■ Low tWU: 50ms in PHG mode, 100ms in SE mode

■ Available in lead-free DFN10 3x3mm

Applications

■ Headphone amplifier

■ Mobile phone

■ PDA, portable audio player

Description

The TS4909 is a stereo audio amplifier designed

to drive headphones in portable applications.

The integrated phantom ground is a circuit

topology that eliminates the heavy output coupling

capacitors. This is of primary importance in

portable applications where space constraints are

very high. A single-ended configuration is also

available, offering even lower power consumption

because the phantom ground can be switched off.

Pop-and-click noise during switch-on and switch-

off phases is eliminated by integrated circuitry.

Specially designed for applications requiring low

power supplies, the TS4909 is capable of

delivering 31mW of continuous average power

into a 32

Ω load with less than 1% THD+N from a

3V power supply.

Featuring an active low standby mode, the

TS4909 reduces the supply current to only 10nA

(typ.). The TS4909 is unity gain stable and can be

configured by external gain-setting resistors.

Pin connections (top view)

DFN10 (3x3)

1

2

3

4

7

10

9

8

5

6

1

2

3

4

7

10

9

8

5

6

Vin1

Vin2

Stdby

Bypass

SE/PHG

Vdd

Vout1

Vout3

Vout2

Gnd

Vin1

Vin2

BIAS

Gnd

Vout1

Vout2

Vout3

Stdby

SE/PHG

Functional block diagram

Bypass

Vdd

www.st.com

类似零件编号 - TS4909

制造商	部件名	数据表	功能描述
STMicroelectronics	TS4909	585Kb / 35P	Dual mode low power 150 mW stereo headphone amplifier with capacitor-less and single-ended outputs 14-Jan-2013
	TS4909IQT	585Kb / 35P	Dual mode low power 150 mW stereo headphone amplifier with capacitor-less and single-ended outputs 14-Jan-2013
	TS4909	585Kb / 35P	Dual mode low power 150 mW stereo headphone amplifier with capacitor-less and single-ended outputs 14-Jan-2013

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