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SGM8905 Datasheet PDF - SG Micro

Part Number SGM8905
Description Capless 2Vrms to 3Vrms Line Driver
Manufacturers SG Micro 
Logo SG Micro Logo 

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SGM8905
Capless 2Vrms to 3Vrms Line
Driver with Adjustable Gain
GENERAL DESCRIPTION
FEATURES
The SGM8905 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 SGM8905 is capable of driving 3Vrms into a 2.5k
load with 5V supply voltage. The device has single input
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 SGM8905 has build-in shutdown control for
pop/click-free on/off control.
Using the SGM8905 in audio products can reduce
component count compared to traditional methods of
generating a 3Vrms output. The SGM8905 doesn't
require a power supply greater than 5V to generate an
8.5VPP output, nor does the device require a split rail
power supply. The SGM8905 integrates a charge pump
to generate a negative supply rail that provides a clean,
pop/click-free ground-biased 3Vrms output.
Capless Structure
Eliminates Pop/Clicks
Eliminates Output DC-Blocking Capacitors
Provides Flat Frequency Response from DC to 20kHz
Low Noise and THD
Typical SNR = 107dB
Typical VN = 7μVrms
Typical THD+N = 0.001% (f = 1kHz)
2Vrms Output Voltage into 2.5kLoad with 3.3V
Supply Voltage
3Vrms Output Voltage into 2.5kLoad with 5V
Supply Voltage
-40to +85Operating Temperature Range
Available in the Green MSOP-10 (Exposed Pad)
Package
APPLICATIONS
Set-Top Box
LCD TV
Blue-Ray DVD-Players
Home Theater in a Box
The SGM8905 is available in Green MSOP-10 (Exposed
Pad) package. It operates over an ambient temperature
range of -40to +85.
SG Micro Corp
www.sg-micro.com
REV. B

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SGM8905 equivalent
SGM8905
Capless 2Vrms to 3Vrms Line
Driver with Adjustable Gain
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25, CPUMP = CPVSS = 1µF, CIN = 10µF, RIN = 10k, RFB = 20k, unless otherwise noted.
THD+N vs. Output Voltage
10
VDD = 3.3V
1
RL = 600
f = 1kHz
0.1
0.01
0.001
0.0001
0.1
0.2 0.5 1 2
Output Voltage (Vrms)
5
THD+N vs. Output Voltage
10
VDD = 5V
1
RL = 600
f = 1kHz
0.1
0.01
0.001
0.0001
0.1
0.2
0.5 1
2
Output Voltage (Vrms)
5
THD+N vs. Output Voltage
10
VDD = 3.3V
1
RL = 2.5k
f = 1kHz
0.1
0.01
0.001
0.0001
0.1
0.2
0.5 1
2
Output Voltage (Vrms)
5
THD+N vs. Output Voltage
10
VDD = 5V
RL = 2.5k
1 f = 1kHz
0.1
0.01
0.001
0.0001
0.1
0.2
0.5 1
2
Output Voltage (Vrms)
5
THD+N vs. Output Voltage
10
VDD = 3.3V
1
RL = 100k
f = 1kHz
0.1
0.01
0.001
0.0001
0.1
0.2 0.5 1 2
Output Voltage (Vrms)
5
THD+N vs. Output Voltage
10
VDD = 5V
1
RL = 100k
f = 1kHz
0.1
0.01
0.001
0.0001
0.1
0.2
0.5 1
2
Output Voltage (Vrms)
5
SG Micro Corp
www.sg-micro.com
5


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