SG Micro Corp

SGM8902 Capless 2Vrms to 3Vrms Line Driver with Adjustable Gain

GENERAL DESCRIPTION

The SGM8902 is a 2Vrms to 3Vrms pop/click-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.

The SGM8902 is capable of driving 2Vrms into a 2.5kΩ load with 3.3V supply voltage. The device has differential inputs and uses external gain setting resistors that supports a gain range of ±1V/V to ±10V/V. The use of external gain resistors also allows the implementation of a 2nd-order low pass filter to compliment DAC's and SOC converters. The SGM8902 has build-in shutdown control for pop/click-free on/off control.

Using the SGM8902 in audio products can reduce component count compared to traditional methods of generating a 2Vrms output. The SGM8902 doesn't require a power supply greater than 3.3V to generate a 5.6VPP output, nor does the device require a split rail power supply. The SGM8902 integrates a charge pump to generate a negative supply rail that provides a clean, pop/click-free ground-biased 2Vrms output.

The SGM8902 is available in Green TSSOP-14 package. It operates over an ambient temperature range of -40 to +85.


PIN CONFIGURATIONS


FEATURES

• Capless Structure
   Eliminates Pop/Clicks
   Eliminates Output DC-Blocking Capacitors
   Provides Flat Frequency Response from DC to 20kHz
• Low Noise and THD
   Typical SNR = 114dB
   Typical VN = 5.5μVrms
   Typical THD+N = 0.001% (f = 1kHz)
• 2Vrms Output Voltage into 2.5kΩ Load with 3.3V
   Supply Voltage
• 3Vrms Output Voltage into 2.5kΩ Load with 5V
   Supply Voltage
• Differential Input

APPLICATIONS

Set-Top Box
LCD TV
Blue-Ray DVD-Players
Home Theater in a Box


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM8902YTS14G/TR Production TSSOP-14 14 Y -40℃ to +85℃ Samples

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