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  • 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 31 mW of continuous average power into a 32 Ω load with less than 1% THD+N from a 3 V power supply. Featuring an active low standby mode, the TS4909 reduces the supply current to only 10 nA (typ.). The TS4909 is unity gain stable and can be configured by external gain-setting resistors.

    Key Features

    • No output coupling capacitors necessary
    • Pop-and-click noise reduction circuitry
    • Operating from VCC = 2.2 V to 5.5 V
    • Standby mode active low
    • Output power:
      • 158 mW at 5 V, into 16 Ω with 1% THD+N max (1 kHz)
      • 52 mW at 3.0 V into 16 Ω with 1% THD+N max (1 kHz)
    • Ultra-low current consumption: 2.0 mA typ. at 3 V
    • Ultra-low standby consumption: 10 nA typ.
    • High signal-to-noise ratio: 105 dB typ. at 5 V
    • High crosstalk immunity: 110 dB (F = 1 kHz) for single-ended outputs
    • PSRR: 72 dB (F = 1 kHz), inputs grounded, for phantom ground outputs
    • Low tWU: 50 ms in PG mode, 100 ms in SE mode
    • Available in lead-free DFN10 3 x 3 mm

Circuit Diagram

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
TS4909IQT
Active
VDFPN 10 3x3x1.0 Industrial Ecopack1

TS4909IQT

Package:

VDFPN 10 3x3x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VDFPN 10 3x3x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

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ECCN (US)
ECCN (EU)
Packing Type
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Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
TS4909IQT Available at 2 distributors

Distributor availability ofTS4909IQT

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 50 0 Order Now
MOUSER WORLDWIDE 2936 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

ARROW

Stock

50

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2936

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-25

Buy Direct
Active
EAR99 NEC Tape And Reel VDFPN 10 3x3x1.0 -40 85 MALAYSIA 0.454 / 1k

TS4909IQT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.454 / 1k

Distributor availability ofTS4909IQT

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 50 0 Order Now
MOUSER WORLDWIDE 2936 1 Order Now

Distributor reported inventory date: 2020-10-25

Distributor Name

ARROW

Stock

50

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2936

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-25

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VDFPN 10 3x3x1.0

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

0.454 / 1k

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors