DirectPath™, 2-VRMS Line Driver With Adjustable Gain



The DRV632 is a 2-VRMS pop-free stereo line driver designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. The device is ideal for single-supply electronics where size and cost are critical design parameters.

Designed using TI’s patented DirectPath™ technology, The DRV632 is capable of driving 2 VRMS into a 10-kΩ load with 3.3-V supply voltage. The device has differential inputs and uses external gain-setting resistors to support a gain range of ±1 V/V to ±10 V/V, and gain can be configured individually for each channel. Line outputs have ±8-kV IEC ESD protection, requiring just a simple resistor-capacitor ESD protection circuit. The DRV632 has built-in active-mute control for pop-free audio on/off control. The DRV632 has an external undervoltage detector that mutes the output when the power supply is removed, ensuring a pop-free shutdown.

Using the DRV632 in audio products can reduce component count considerably compared to traditional methods of generating a 2-VRMS output. The DRV632 does not require a power supply greater than 3.3 V to generate its 5.6-Vpp output, nor does it require a split-rail power supply. The DRV632 integrates its own charge pump to generate a negative supply rail that provides a clean, pop-free ground-biased 2-VRMS output.

The DRV632 is available in a 14-pin TSSOP.


  • Stereo DirectPath™ Audio Line Driver
    • 2 Vrms Into 10 kΩ With 3.3-V Supply
  • Low THD+N < 0.01% at 2 Vrms Into 10 kΩ
  • High SNR, >90 dB
  • 600-Ω Output Load Compliant
  • Differential Input and Single-Ended Output
  • Adjustable Gain by External Gain-Setting
  • Low DC Offset, <1 mV
  • Ground-Referenced Outputs Eliminate DC-
    Blocking Capacitors
    • Reduce Board Area
    • Reduce Component Cost
    • Improve THD+N Performance
    • No Degradation of Low-Frequency Response
      Due to Output Capacitors
  • Short-Circuit Protection
  • Click- and Pop-Reduction Circuitry
  • External Undervoltage Mute
  • Active Mute Control for Pop-Free Audio On/Off
  • Space-Saving TSSOP Package

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Parametrics Compare all products in 2V/3Vrms Line Driver

Analog Supply (V) (Min)
Analog Supply (V) (Max)
Gain (V/V)
Input Offset (+/-) (uV)
Iq (Typ) (mA)
Package Group
Package Size: mm2:W x L (PKG)
Operating Temperature Range (C)
DRV632 DRV600 DRV601 DRV602 DRV603 DRV604 DRV612
3    1.8    1.8    3    3    3    3   
3.6    4.5    4.5    5.5    5.5    3.7    3.6   
Adjustable    Fixed    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
1000    8000    8000    5000    1000    500    1000   
14    8    8    11    11    11    14   
80    -80    88    88    88    80    80   
14TSSOP: 32 mm2: 6.4 x 5(TSSOP)    20QFN: 16 mm2: 4 x 4(QFN)    20QFN: 16 mm2: 4 x 4(QFN)    14TSSOP: 32 mm2: 6.4 x 5(TSSOP)    14TSSOP: 32 mm2: 6.4 x 5(TSSOP)    28HTSSOP: 62 mm2: 6.4 x 9.7(HTSSOP)    14TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16VQFN: 9 mm2: 3 x 3(VQFN)   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
14TSSOP    20QFN    20QFN    14TSSOP    14TSSOP    28HTSSOP    14TSSOP

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