GENERAL DEscriptION
The SGM8910 is a high performance 4Vrms stereo audio line driver with click-pop noise cancellation. The device is ideal for single supply applications. The SGM8910 can drive 32Ω impedance headphone directly, so it can be used as the high performance driver of line out and headphone in different applications. Capless design can eliminate output DC-blocking capacitors for less-component count and low-cost.
The SGM8910 is capable of driving 4Vrms into a 600Ω load when VDD is 10V or 20mW into a 32Ω headphone when VDD is 3.3V. An integrated charge pump generates a negative power rail that provides a clean, pop-free ground offset.
For some special applications where AC coupling output is necessary, the SGM8910 provides MUTEOUT driver to drive external click-pop noise cancellation circuit during power-on and power-off.
The SGM8910 will be in mute status during power-on blanking time. External mute control signal can take over the mute status before power-on blanking time is over. The SGM8910 can eliminate power-up click-pop noise perfectly. Using under-voltage protection (UVP), the SGM8910 will suppress the turn-off click-pop noise.
The SGM8910 is available in Green TSSOP-20 and TQFN-4×4-20L packages. It operates over an ambient temperature range of -40℃ to +85℃.
FEATURES
Supply Voltage: 2.8V to 12V
Capless Structure to Eliminate Pop-Clicks and Output DC-Blocking Capacitors
Low Noise, Low THD and Low Crosstalk:
Typical VN = 6μVRMS from 22Hz to 22kHz at Gain = -1
THD+N = 0.0008% for 10kΩ Load and Gain = -1 at 1kHz
Crosstalk = -89dB at 1kHz
4Vrms Output Voltage into 600Ω Load for 10V VDD
1Vrms Output Voltage into 600Ω Load for 3.3V VDD
Supports to Drive 32Ω to 600Ω Headphone:
THD+N = 0.006% for 32Ω Headphone and PO = 20mW at VDD = 3.3V
Single-Ended Output
Differential or Single-Ended Input
UVP Function to Cancel Turn-Off Click-Pop Noise
Adjustable Power-On Blanking Time to Eliminate Turn-On Click-Pop Noise
Short-Circuit and Thermal Protection for Audio Driver
Negative LDO with Output Auto-Discharge Function in Disable Status
1.8V Logical Control for EN and MUTE
-40℃ to +85℃ Operating Temperature Range
Available in Green TSSOP-20 and TQFN-4×4-20L Packages
APPLICATIONS
LCD TVs
Mini/Micro Combo Systems
Soundcards
DVD Players