SGM8903
Capless 3Vrms Line Driver with Adjustable Gain
GENERAL DESCRIPTION环亚琅文
The SGM8903 is a 3Vrms Pop&Click-less 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 2.5k Ω load with 5V supply voltage. The device has differential inputs and us external gain tting resistors, that supports a gain range of ±1V/V to ±10V/V. The u 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.
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 its 8.5V PP output, nor does it require a split rail power supply. The SGM8903 integrates its own charge pump to generate a negative supply rail that provides a clean, pop&click-less ground biad 3Vrms output.
The SGM8903 is available in a 14 pin TSSOP package. It operates over an ambient temperature ran
ge of -40℃ to +85℃.
FEATURES
z
Capless Structure Eliminates Pop/Clicks
Eliminates Output DC-Blocking Capacitors Provides Flat Frequency Respon DC to 20kHz z
Low Noi and THD Typical SNR = 107dB Typical V N = 8µVrms
Typical THD+N = 0.001% (f = 1kHz)
z 3Vrms Output Voltage into 2.5k Ω Load with 5V Supply Voltage z Differential Input
APPLICATIONS
Set-Top Box LCD TV
Blue-Ray DVD-Players Home Theater in a Box
SG Micro Limited
SGM8903 with Adjustable Gain
2
SG Micro Limited
PACKAGE/ORDERING INFORMATION
MODEL
PACKAGE DESCRIPTION
ORDERING NUMBER
材料采购科目
PACKAGE MARKING
PACKAGE OPTION
SGM8903 TSSOP14 SGM8903YTS14G/TR SGM8903YTS14 Tape and Reel, 3000
ABSOLUTE MAXIMUM RATINGS
-0.3V to 6V
...V SS - 0.3V to V DD + 0.3V Minimum Load Impedance (R L ) .......................................>600Ω EN -0.3V to V DD + 0.3V Operating -40℃ to +85℃
150℃ -65℃ to +150℃ Lead Temperature (soldering, 10s)...................................260℃ ESD Susceptibility
<.400V
NOTE:
Stress above tho listed under Absolute Maximum Ratings may cau permanent damage to the device. This is a stress rating only; functional operation of the device at the or any other conditions above tho indicated in the operational ction of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay attention to ESD protection. SGMICRO recommends that all integrated circuits be handled with appropriate precautions. Failure to obrve proper handling and installation procedures can cau damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage becau very small parametric changes could cau the device not to meet its published specifications.
SGMICRO rerves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. Plea contact SGMICRO sales office to get the last datasheet.
TYPICAL OPERATION CIRCUIT
SGM8903 with Adjustable Gain
３
SG Micro Limited
PIN CONFIGURATION (TOP VIEW)
+INR -INR -INL EN SGND UVP PVSS OUTL CP
PVDD PGND CN
日记用英语怎么说OUTR +INL TSSOP14
PIN DESCRIPTION
PIN NAME FUNCTION
1 +INR Right channel OPAMP positive input
2 -INR Right channel OPAMP negative input
3 OUTR Right channel OPAMP output
4 SGND Signal groundbln
5 EN Enable input, active high
6 PVSS Negative supply voltage output
7 CN Charge pump flying capacitor negative terminal 8
diamond snowexperiment是什么意思CP
Charge pump flying capacitor positive terminal
9 PVDD Positive supply 10 PGND Power ground 11 UVP Undervoltage protection input 12 OUTL Left channel OPAMP output 13 -INL Left channel OPAMP negative input 14
+INL
Left channel OPAMP positive input
SGM8903 with Adjustable Gain
4
SG Micro Limited
ELECTRICAL CHARACTERISTICS
(T A = 25℃, unless otherwi noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
tomorrow是什么意思ELECTRICAL CHARACTERISTICS
Output Offt Voltage (|V OS |) V DD = 3V to 5V 1.2 5 mV Supply Rejection Ratio (PSRR)
V DD = 3V to 5V
97
dB
High-Level Output Voltage(V OH ) V DD = 3.3V, R L = 2.5k Ω 3.18 V
Low-Level Output Voltage (V OL ) V DD = 3.3V, R L = 2.5k Ω -3.1 V High-Level Input Current (EN) (|I IH |) V DD = 5V, V I = V DD 1 µA Low-Level Input Current (EN) (|I IL |) V DD = 5V, V I = 0V
1
µA
V DD = 3.3V, No load, EN = V DD 8.5 11.3
V DD = 5V, No load, EN = V DD 12 15 Supply Current (I DD ) Shutdown mode, V DD = 3V to 5V
0.1 0.2 mA
OPERATING CHARACTERISTICS (V DD = 3.3V, R L = 2.5k Ω, C (PUMP) = C (PVSS) = 1µF, C IN = 10µF, R IN = 10k Ω, R fb = 20k Ω)
THD = 1%, V DD = 3.3V, f = 1kHz
2.05 THD = 1%, V DD = 5V, f = 1kHz
3.05
Output Voltage (Outputs In Pha) (V O ) THD = 1%, V DD = 5V, f = 1kHz, R L = 100k Ω 3.1 Vrms
V O = 2Vrms, f = 1kHz 0.001
Total Harmonic Distortion Plus Noi (THD+N)
V O = 2Vrms, f = 6.8kHz
0.004
%
Crosstalk V O = 2Vrms, f = 1kHz 75 dB Output Current Limit (I O ) V DD = 3.3V 20 mA Input Resistor Range (R IN ) 1 10 47 k Ω
Feedback Resistor Range (R FB ) 4.7 20 100 k Ω Slew Rate
8 V/µs Maximum Capacitive Load
220 pF Noi Output Voltage (V N ) A-weighted, BW = 20kHz
8
µVrms
Signal to Noi Ratio (SNR)
V O = 3Vrms, THD+N = 0.1%, BW = 20kHz
wrangleA-weighted
107 dB
humorous
Unity Gain Bandwidth (G BW ) 5.3 MHz Open-Loop Voltage Gain (A VO ) 120 dB Charge Pump Frequency (F CP )
330 410 500 kHz
英语人才网External Undervoltage Detection (V UVP ) 1.15 V
External Undervoltage Detection Hysteresis
Current (I Hys )
4.6 µA
SHUTDOWN PIN Input High Voltage (V INH ) 1.2 V
Input Low Voltage (V INL )
0.6 V
RECOMMENDED OPERATING CONDITIONS
DC Supply Voltage (V DD ) 3 5.5 V
SGM8903 with Adjustable Gain
5
SG Micro Limited
TYPICAL PERFORMANCE CHARACTERISTICS
V DD = 3.3V, T A = 25℃, R L = 2.5k Ω, C (PUMP) = C (PVSS) = 1µF, C IN = 10µF, R IN = 10k Ω, R FB = 20k Ω (unless otherwi noted).
