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부품번호 | SGM8905 기능 |
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기능 | Capless 2Vrms to 3Vrms Line Driver | ||
제조업체 | SG Micro | ||
로고 | |||
전체 13 페이지수
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 2.5kΩ
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 2.5kΩ Load with 3.3V
Supply Voltage
3Vrms Output Voltage into 2.5kΩ Load with 5V
Supply Voltage
-40℃ to +85℃ Operating 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 -40℃ to +85℃.
SG Micro Corp
www.sg-micro.com
REV. B
SGM8905
Capless 2Vrms to 3Vrms Line
Driver with Adjustable Gain
ELECTRICAL CHARACTERISTICS
(TA = 25℃, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP
ELECTRICAL CHARACTERISTICS
DC Supply Voltage (VDD)
Output Offset Voltage (|VOS|)
Power Supply Rejection Ratio (PSRR)
VDD = 3V to 5V
VDD = 3V to 5V
3
1.5
97
High-Level Output Voltage (VOH)
VDD = 3.3V, RL = 2.5kΩ
3.18
Low-Level Output Voltage (VOL)
VDD = 3.3V, RL = 2.5kΩ
High-Level Input Current (EN) (|IIH|)
VDD = 5V, VI = VDD
Low-Level Input Current (EN) (|IIL|)
VDD = 5V, VI = 0V
VDD = 3.3V, No load, EN = VDD
11.6
Supply Current (IDD)
VDD = 5V, No load, EN = VDD
11.7
Shutdown mode, VDD = 3V to 5V
0.1
OPERATING CHARACTERISTICS (VDD = 3.3V, RL = 2.5kΩ, CPUMP = CPVSS = 1µF, CIN = 10µF, RIN = 10kΩ, RFB = 20kΩ.) (1)
THD = 1%, VDD = 3.3V, f = 1kHz
2.05
Output Voltage (Outputs in Phase) (VO)
THD = 1%, VDD = 5V, f = 1kHz
3.05
THD = 1%, VDD = 5V, f = 1kHz, RL = 100kΩ
3.1
Total Harmonic Distortion Plus Noise (THD+N) VO = 2Vrms, f = 1kHz
0.001
Crosstalk
VO = 2Vrms, f = 1kHz
115
Output Current Limit (IO)
VDD = 3.3V
20
Input Resistor Range (RIN)
10
Feedback Resistor Range (RFB)
20
Slew Rate
8
Maximum Capacitive Load
220
Noise Output Voltage (VN)
A-weighted, BW = 20kHz
7
Signal to Noise Ratio (SNR)
A-weighted, VO = 2Vrms, BW = 20kHz
107
Unity Gain Bandwidth (GBW)
5.4
Open-Loop Voltage Gain (AVO)
100
Charge Pump Frequency (FCP)
300 425
External Undervoltage Detection (VUVP)
External Undervoltage Detection Hysteresis
Current (IHys)
SHUTDOWN PIN
1.02
1.13
4.6
Input High Voltage (VINH)
Input Low Voltage (VINL)
EN
EN
1.2
MAX
5.5
6
-3.05
1
1
16
16.5
0.18
540
1.22
0.6
UNITS
V
mV
dB
V
V
μA
μA
mA
Vrms
%
dB
mA
kΩ
kΩ
V/μs
pF
μVrms
dB
MHz
dB
kHz
V
μA
V
V
NOTE:
1. For CPUMP, CPVSS, CIN, RIN and etc, please refer to the APPLICATION CIRCUIT on page 7.
SG Micro Corp
www.sg-micro.com
4
4페이지 SGM8905
APPLICATION CIRCUIT
Left
Input
CIN RIN
RFB
Capless 2Vrms to 3Vrms Line
Driver with Adjustable Gain
Left
Output
Supply
CBYP
Line
Driver
Short Circuit
Protection
Line
Driver
Click and Pop
Suppression
Bias
Circuitry
CPUMP
1µF
Right
Input CIN RIN
10kΩ
CPVSS
1µF
Right
RFB Output
To External Power
Supply or Control I/O
NOTES:
1. In order to get good performance, it’s important to select the right CPUMP, CPVSS and CBYP in application. All tests are performed with
circuit set up with X5R and X7R capacitors. Capacitors having high dissipative loss, such as Y5V capacitor, may cause performance
degradation and unexpected system behavior.
2. A 10kΩ resistor must be serially connected to EN pin.
SG Micro Corp
www.sg-micro.com
7
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부품번호 | 상세설명 및 기능 | 제조사 |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |