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PDF SGM8903 Data sheet ( Hoja de datos )
| Número de pieza | SGM8903 | |
| Descripción | Capless 3Vrms Line Driver | |
| Fabricantes | SG Micro | |
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Hay una vista previa y un enlace de descarga de SGM8903 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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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
1 page  
SGM8903
Capless 3Vrms Line Driver
with Adjustable Gain
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25℃, RL = 2.5kΩ, CPUMP = 0.33µF, CPVSS = 0.33µF, CIN = 10µF, RIN = 10kΩ, RFB = 20kΩ, unless otherwise noted.
THD+N vs. Output Voltage
10
VDD = 5V, RL = 100kΩ
1 f = 1kHz
0.1
0.01
0.001
0.0001
0.1
1
Output Voltage (Vrms)
10
THD+N vs. Output Voltage
10
VDD = 5V, RL = 2.5kΩ
1 f = 1kHz
0.1
0.01
0.001
0.0001
0.1
1
Output Voltage (Vrms)
10
THD+N vs. Output Voltage
10
VDD = 5V, RL = 600Ω
f = 1kHz
1
THD+N vs. Frequency
0.1
VDD = 5V, RL = 100kΩ
VO = 2Vrms
0.1 0.01
0.01
0.001
0.1
1
Output Voltage (Vrms)
10
0.001
0.01
0.1 1 10
Frequency (kHz)
100
FFT vs. Frequency
0
-20
VDD = 5V, RL = 100kΩ
VO = 3mVrms
-40
-60
-80
-100
-120
-140
-160
0
5 10 15
Frequency (kHz)
20
25
Gain vs. Frequency
8
VDD = 5V, RL = 100kΩ
7 VO = 2Vrms
6
5
4
3
0.01
0.1
1 10 100
Frequency (kHz)
1000
SG Micro Corp
www.sg-micro.com
5
5 Page 
SGM8903
PCB Layout Guide
Capless 3Vrms Line Driver
with Adjustable Gain
+INR 1
-INR 2
OUTR 3
SGND 4
EN 5
PVSS 6
CN 7
14 +INL
13 -INL
SGM8903
12 OUTL
11 UVP
10 PGND
9 PVDD
8 CP
0.1µF
VDD
TSSOP-14
NOTE: 0.1μF decoupling capacitor must be close to PGND and PVDD pins; capacitor can be connected between PVDD and PGND
pins directly and then connect PGND pin to GND layer.
The reference PCB layout is shown in below:
Zoomed in:
SG Micro Corp
www.sg-micro.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SGM8903.PDF ] | |
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