Power Amplifier. LM4890 Datasheet

LM4890 Amplifier. Datasheet pdf. Equivalent

LM4890 Datasheet
Recommendation LM4890 Datasheet
Part LM4890
Description 1 Watt Audio Power Amplifier
Feature LM4890; LM4890 www.ti.com SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013 LM4890 1 Watt Audio Power Amplifi.
Manufacture etcTI
Datasheet
Download LM4890 Datasheet




Texas Instruments LM4890
LM4890
www.ti.com
SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013
LM4890
1 Watt Audio Power Amplifier
Check for Samples: LM4890
FEATURES
1
2 Available in Space-Saving Packages: DSBGA,
VSSOP, SOIC, and WSON
• Ultra Low Current Shutdown Mode
• BTL Output Can Drive Capacitive Loads
• Improved Pop & Click Circuitry Eliminates
Noises During Turn-On and Turn-Off
Transitions
• 2.2 - 5.5V Operation
• No Output Coupling Capacitors, Snubber
Networks or Bootstrap Capacitors Required
• Thermal Shutdown Protection
• Unity-Gain Stable
• External Gain Configuration Capability
APPLICATIONS
• Mobile Phones
• PDAs
• Portable Electronic Devices
KEY SPECIFICATIONS
• PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.)
• Power Output at 5.0V & 1% THD: 1W(typ.)
• Power Output at 3.3V & 1% THD: 400mW(typ.)
• Shutdown Current: 0.1μA(typ.)
DESCRIPTION
The LM4890 is an audio power amplifier primarily
designed for demanding applications in mobile
phones and other portable communication device
applications. It is capable of delivering 1 watt of
continuous average power to an 8BTL load with
less than 1% distortion (THD+N) from a 5VDC power
supply.
Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components. The
LM4890 does not require output coupling capacitors
or bootstrap capacitors, and therefore is ideally suited
for mobile phone and other low voltage applications
where minimal power consumption is a primary
requirement.
The LM4890 features a low-power consumption
shutdown mode, which is achieved by driving the
shutdown pin with logic low. Additionally, the LM4890
features an internal thermal shutdown protection
mechanism.
The LM4890 contains advanced pop & click circuitry
which eliminates noises which would otherwise occur
during turn-on and turn-off transitions.
The LM4890 is unity-gain stable and can be
configured by external gain-setting resistors.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2001–2013, Texas Instruments Incorporated



Texas Instruments LM4890
LM4890
SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013
Connection Diagrams
Top View
Top View
www.ti.com
Figure 1. 8 Bump DSBGA Package
See Package Number YPB0008
Top View
Figure 2. 9 Bump DSBGA Package
See Package Number YZR0009
Top View
Figure 3. WSON Package
See Package Number NGZ0010B
Top View
Figure 4. Mini Small Outline (VSSOP) Package
See Package Number DGK0008A
Top View
Figure 5. Small Outline (SOIC) Package
See Package Number D0008A
Figure 6. 9 Bump DSBGA Package
See Package Number YZR0009AAA
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Product Folder Links: LM4890
Copyright © 2001–2013, Texas Instruments Incorporated



Texas Instruments LM4890
www.ti.com
Typical Application
Rf
CS VDD 20k
1PF
LM4890
SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013
Audio
Input
RIN
20k
CIN
0.39PF
SW
15pF
A1
10k
20k
VOUT1
-
RL
8:
250k
500k
20k
CBYPASS
1PF
Shutdown
Control
VIH
VIL
250k
A2
GND
10k
Figure 7. Typical Audio Amplifier Application Circuit
VOUT2
+
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Copyright © 2001–2013, Texas Instruments Incorporated
Product Folder Links: LM4890
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