DirectPath™, 2-VRMS Line Driver With Adjustable Gain  - DRV632


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

Gain (V/V)
Input Offset (+/-) (uV)
Vmax (V)
Vmin (V)
Approx. Price (US$)
Operating Temperature Range (C)
DRV632 DRV600 DRV601 DRV602 DRV603 DRV604 DRV612
Adjustable     1.5     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
14TSSOP     20QFN     20QFN     14TSSOP     14TSSOP     28HTSSOP     14TSSOP
1000     8000     8000     5000     1000     500     1000    
4     4.5     4.5     5.5     5.5     3.7     3    
3     1.8     1.8     3     3     3     4    
0.50 | 1ku     0.98 | 1ku     0.75 | 1ku     0.70 | 1ku     0.85 | 1ku     1.00 | 1ku     0.60 | 1ku    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    

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