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부품번호 | SGM8903 기능 |
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기능 | Capless 3Vrms Line Driver | ||
제조업체 | SG Micro | ||
로고 | |||
전체 14 페이지수
SGM8903
Capless 3Vrms Line Driver
with Adjustable Gain
GENERAL DESCRIPTION
The SGM8903 is a 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 SGM8903 is capable of driving 3Vrms into a 2.5kΩ
load with 5V 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 SGM8903 has build-in shutdown control
for pop/click-free on/off control.
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 = 107dB
Typical VN = 8μVrms
Typical THD+N = 0.001% (f = 1kHz)
3Vrms Output Voltage into 2.5kΩ Load with 5V
Supply Voltage
Differential Input
Using the SGM8903 in audio products can reduce
component count compared to traditional methods of
generating a 3Vrms output. The SGM8903 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 SGM8903 integrates a charge pump
to generate a negative supply rail that provides a clean,
pop/click-free ground-biased 3Vrms output.
The SGM8903 is available in Green TSSOP-14 package.
It operates over an ambient temperature range of -40℃
to +85℃.
APPLICATIONS
Set-Top Box
LCD TV
Blue-Ray DVD-Players
Home Theater in a Box
SG Micro Corp
www.sg-micro.com
REV. C. 1
SGM8903
Capless 3Vrms Line Driver
with Adjustable Gain
ELECTRICAL CHARACTERISTICS
(TA = 25℃, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
ELECTRICAL CHARACTERISTICS
Output Offset Voltage (|VOS|)
VDD = 3V to 5V
1.2 5
Power Supply Rejection Ratio (PSRR)
VDD = 3V to 5V
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
-3.1
High-Level Input Current (EN) (|IIH|)
VDD = 5V, VI = VDD
1
Low-Level Input Current (EN) (|IIL|)
VDD = 5V, VI = 0V
1
VDD = 3.3V, No load, EN = VDD
8.1 11.3
Supply Current (IDD)
VDD = 5V, No load, EN = VDD
12 16
Shutdown mode, VDD = 3V to 5V
0.1 0.2
OPERATING CHARACTERISTICS (VDD = 3.3V, RL = 2.5kΩ, CPUMP = 0.33µF, CPVSS = 0.33µF, 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
VO = 2Vrms, f = 1kHz
0.001
(THD+N)
VO = 2Vrms, f = 6.8kHz
0.004
Crosstalk
VO = 2Vrms, f = 1kHz
115
Output Current Limit (IO)
VDD = 3.3V
20
Input Resistor Range (RIN)
1 10 47
Feedback Resistor Range (RFB)
4.7 20 100
Slew Rate
8
Maximum Capacitive Load
220
Noise Output Voltage (VN)
Signal to Noise Ratio (SNR)
A-weighted, BW = 20kHz
VO = 3Vrms, THD+N = 0.1%, BW = 20kHz,
A-weighted
8
107
Unity Gain Bandwidth (GBW)
Open-Loop Voltage Gain (AVO)
Charge Pump Frequency (FCP)
External Undervoltage Detection (VUVP)
External Undervoltage Detection Hysteresis
Current (IHys)
SHUTDOWN PIN
5.3
120
300 410 550
1.05
1.13
1.25
4.6
Input High Voltage (VINH)
Input Low Voltage (VINL)
RECOMMENDED OPERATING CONDITIONS
1.2
0.6
DC Supply Voltage (VDD)
3 5.5
UNITS
mV
dB
V
V
μA
μA
mA
Vrms
%
dB
mA
kΩ
kΩ
V/μs
pF
μVrms
dB
MHz
dB
kHz
V
μA
V
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 SGM8903
APPLICATION CIRCUIT
-
LEFT
INPUT
+
CIN RIN
CIN RIN
R1
C2
R1
RFB
RFB
C1
Capless 3Vrms Line Driver
with Adjustable Gain
LEFT
C1 OUTPUT
Supply
CBYP
1µF
Line
Driver
Line
Driver
Short Circuit
Protection
Click and
Pop
Suppression
Bias
Circuitry
CPUMP
0.33µF
+
RIGHT
INPUT-
CIN
CIN
RIN
RIN
RFB
R1
C1
C2
R1
RFB
C1
10kΩ
CPVSS
0.33µF
RIGHT
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
7페이지 | |||
구 성 | 총 14 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
SGM8903 | Capless 3Vrms Line Driver | SG Micro |
SGM8904 | Capless 2Vrms to 3Vrms Line Driver | SG Micro |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |