sgm4894 sg-micro, sgm4894 Datasheet

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sgm4894

Manufacturer Part Number
sgm4894
Description
1.1w Fully Differential Audio Power Amplifier With Internal Feedback Resistors
Manufacturer
sg-micro
Datasheet
1.SGM4894.pdf (9 pages)
GENERAL DESCRIPTION
The SGM4894 is a fully differential audio power amplifier
that is designed for portable communication device
applications and demanding applications in mobile
phones. It is capable of delivering 1.1W of continuous
average power to an 8Ω BTL load with less than 1%
distortion (THD+N) from a 5V battery voltage. It operates
from 2.5V to 5.5V power supply.
The SGM4894 features a low-power consumption
shutdown mode. To facilitate this, Shutdown may be
enabled by logic low. Additionally, the SGM4894 features
an internal thermal shutdown protection mechanism.
The SGM4894 contains advanced pop & click circuitry, a
minimal count of external components and low-power
shutdown mode. All these features make SGM4894 ideal
for wireless handsets and other low voltage applications
where
requirement.
The SGM4894 is unity-gain stable and can be configured
by external gain-setting resistors.
The SGM4894 is available in Pb-free CSP-9 and DFN-8
(3.0mm × 3.0mm) packages. It operates over an ambient
temperature range of -40℃ to +85℃.
minimal
SG Micro Limited
www.sg-micro.com
power
consumption
SGM4894
1.1W Fully Differential Audio Power
Amplifier with Internal Feedback Resistors
is
a
primary
FEATURES
• Fully Differential Amplifier
• Excellent PSRR: Direct Connection to the Battery
• 1.1W to 8Ω BTL Load from 5V Supply at
• Unity Gain Stable
• 2.5V to 5.5V Operation
• Low Shutdown Current
• Shutdown Pin is Compatible with 1.8V Logic
• Improved Pop & Click Circuitry
• Thermal Overload Protection Circuitry
• No Output Coupling Capacitors, Bootstrap
• External Gain Configuration Capability
• -40℃ to +85℃ Operating Temperature Range
• Pb-Free CSP-9 and DFN-8 (3.0mm×3.0mm) Packages
APPLICATIONS
Portable System
Wireless Handset
Mobile Phone
Handheld Computer
PDAs
GPS
THD+N < 1% (TYP)
Capacitors Required
REV. A. 1

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sgm4894 Summary of contents

Page 1

... The SGM4894 is unity-gain stable and can be configured by external gain-setting resistors. The SGM4894 is available in Pb-free CSP-9 and DFN-8 (3.0mm × 3.0mm) packages. It operates over an ambient temperature range of -40℃ to +85℃. SG Micro Limited www ...

Page 2

... DFN-8 (3.0mm×3.0mm) Tape and Reel, 3000 CSP-9 Tape and Reel, 3000 PIN CONFIGURATIONS ( SHDN Bypass IN2 IN1 PACKAGE MARKING OPTION INFORMATION SGM4894DB 4894YG Top View SGM4894YDB8 1 8 VO2 2 7 GND VO1 DFN-8 SGM4894YG IN1 VO1 IN2 GND ...

Page 3

... SHDN + V SDIH V SDIL 1kHz, THD+N < THD 0.6Wrms 1kHz 217Hz (Note 1) PSRR f = 1kHz (Note 1) CMRR f = 217Hz 200mV 1µF BYPASS T SDT SGM4894 MIN TYP 2.5 = 5.0V 0. 3.3V 0. 2.6V 0.03 + -10 0.93 -10 0.80 0. 5.0V, No Load 5. 5.0V, 8Ω Load 5. 3.3V, No Load 5. 3.3V, 8Ω Load 5.42 ...

Page 4

... SGM4894 TYPICAL APPLICATION C I 0.39µ 0.39µF SG Micro Limited www.sg-micro.com 1.1W Fully Differential Audio Power Amplifier with Internal Feedback Resistors R I 20kΩ IN1 Bypass SHDN Bias Circuitry Bypass C B Bypass 1µF (Optional) IN2 R I 20kΩ GND To Battery ...

Page 5

... SGM4894 TYPICAL PERFORMANCE CHARACTERISTICS Small Signal Step Response Time (2µs/div) Small Signal Frequency Response 0.01 0.1 Frequency (MHz) THD+N vs. Output Power +3V 8Ω 1kHz + < 80kHz 0.1 0.01 0.001 0.01 0.1 Output Power (W) SG Micro Limited www.sg-micro.com 1.1W Fully Differential Audio Power ...

Page 6

... SGM4894 TYPICAL PERFORMANCE CHARACTERISTICS THD+N vs. Frequency 1 0.1 0.01 0.001 0.01 0.1 1 Frequency (kHz Large Sine Signal Response OUT+ OUT 3V 20kHz 8Ω, THD = 0.22% L Time (10µs/div) Power Dissipation vs. Output Power 0.5 0.4 0.3 0.2 0 0.2 0.4 0.6 Output Power (W) SG Micro Limited www.sg-micro.com 1.1W Fully Differential Audio Power Amplifier with Internal Feedback Resistors V+ = +3V, 0 ...

Page 7

... SGM4894 TYPICAL PERFORMANCE CHARACTERISTICS Clipping(Dropout) Voltage vs. Supply Voltage 4Ω Top L 0 4Ω Bottom 8Ω Top L 0.6 0.4 0 Supply Voltage (V) SG Micro Limited www.sg-micro.com 1.1W Fully Differential Audio Power Amplifier with Internal Feedback Resistors = 8Ω Bottom ...

Page 8

... SGM4894 PACKAGE OUTLINE DIMENSIONS DFN-8 (3mm × 3mm) 3.000 ± 0.100 TOP VIEW SIDE VIEW Note: All linear dimensions are in millimeters. SG Micro Limited www.sg-micro.com 1.1W Fully Differential Audio Power Amplifier with Internal Feedback Resistors +0.050 0.250 0.650 ± 0.050 -0.070 N5 2.300 ± 0.100 ...

Page 9

... SGM4894 PACKAGE OUTLINE DIMENSIONS CSP-9 0.035±0.015 A1 CORNER TOP VIEW Note: All linear dimensions are in millimeters. 02/2009 REV SGMICRO is dedicated to provide high quality and high performance analog IC products to customers. All SGMICRO products meet the highest industry standards with strict and comprehensive test and quality control systems to achieve world-class consistency and reliability ...

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