Power Amplifier. LM4898 Datasheet

LM4898 Amplifier. Datasheet pdf. Equivalent

LM4898 Datasheet
Recommendation LM4898 Datasheet
Part LM4898
Description 1 Watt Fully Differential Audio Power Amplifier
Feature LM4898; LM4898, LM4898MMBD www.ti.com SNAS216E – MAY 2003 – REVISED APRIL 2013 LM4898 1 Watt Fully Diffe.
Manufacture etcTI
Datasheet
Download LM4898 Datasheet




Texas Instruments LM4898
LM4898, LM4898MMBD
www.ti.com
SNAS216E – MAY 2003 – REVISED APRIL 2013
LM4898
1 Watt Fully Differential Audio Power Amplifier
With Shutdown Select
Check for Samples: LM4898, LM4898MMBD
FEATURES
1
2 Fully Differential Amplification
• Available in Space-Saving Packages DSBGA,
VSSOP, and WSON
• Ultra Low Current Shutdown Mode
• Can Drive Capacitive Loads up to 500pF
• Improved Pop and Click Circuitry Eliminates
Noises During Turn-On and Turn-Off
Transitions
• 2.4 - 5.5V Operation
• No Output Coupling Capacitors, Snubber
Networks or Bootstrap Capacitors Required
• Shutdown High or Low Selectivity
APPLICATIONS
• Mobile Phones
• PDAs
• Portable Electronic Devices
KEY SPECIFICATIONS
• Improved PSRR at 217Hz: 83 dB(typ)
• Power Output at 5.0V, 1% THD: 1.0 W(typ)
• Power Output at 3.3V, 1% THD: 400 mW(typ)
• Shutdown Current: 0.1µA(typ)
DESCRIPTION
The LM4898 is a fully differential 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
LM4898 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 LM4898 features a low-power consumption
shutdown mode. To facilitate this, Shutdown may be
enabled by either logic high or low depending on
mode selection. Driving the shutdown mode pin either
high or low enables the shutdown select pin to be
driven in a likewise manner to enable Shutdown.
Additionally, the LM4898 features an internal thermal
shutdown protection mechanism.
The LM4898 contains advanced pop and click
circuitry which virtually eliminates noises which would
otherwise occur during turn-on and turn-off
transitions.
Connection Diagrams
Top View
Top View
Top View
Figure 1. VSSOP Package
Figure 2. WSON Package
See Package Number DGS0010A See Package Number NGZ0010B
Figure 3. 9 Bump DSBGA
Package
See Package Number
YZR0009AAA
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 © 2003–2013, Texas Instruments Incorporated



Texas Instruments LM4898
LM4898, LM4898MMBD
SNAS216E – MAY 2003 – REVISED APRIL 2013
Typical Application
www.ti.com
Figure 4. Typical Audio Amplifier Application Circuit
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.
Absolute Maximum Ratings (1) (2)
Supply Voltage
Storage Temperature
Input Voltage
Power Dissipation (3)
ESD Susceptibility (4)
ESD Susceptibility (5)
Junction Temperature
Thermal Resistance
θJC (WSON)
θJA (WSON)
θJA (DSBGA)
θJC (VSSOP)
θJA (VSSOP)
For Soldering Information, see AN-1112 DSBGA Wafer Level Chip Scale Package (SNVA009).
6.0V
65°C to +150°C
0.3V to VDD +0.3V
Internally Limited
2000V
200V
150°C
12°C/W
63°C/W
220°C/W
56°C/W
190°C/W
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics VDD = 3V state DC and AC
electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within
the Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good
indication of device performance.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature
TA. The maximum allowable power dissipation is PDMAX = (TJMAX–TA)/θJA or the number given in Absolute Maximum Ratings, whichever
is lower.
(4) Human body model, 100pF discharged through a 1.5kresistor.
(5) Machine Model, 220pF–240pF discharged through all pins.
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Copyright © 2003–2013, Texas Instruments Incorporated
Product Folder Links: LM4898 LM4898MMBD



Texas Instruments LM4898
LM4898, LM4898MMBD
www.ti.com
Operating Ratings
Temperature Range
Supply Voltage
TMIN TA TMAX
SNAS216E – MAY 2003 – REVISED APRIL 2013
40°C TA 85°C
2.4V VDD 5.5V
Electrical Characteristics VDD = 5V (1) (2) (3)
The following specifications apply for VDD = 5V, 8load, and AV = 1V/V, unless otherwise specified. Limits apply for TA =
25°C.
Parameter
Test Conditions
LM4898
Typ (4)
Limit (5)
Units
(Limits)
IDD Quiescent Power Supply Current
ISD Shutdown Current
Po Output Power
THD+N
PSRR
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
VIN = 0V, no load
VIN = 0V, RL = 8
VSDMODE = VSHUTDOWN = GND
THD = 1% (max); f = 1 kHz
LM4898LD, RL= 4(6)
LM4898, RL= 8
Po = 0.4 Wrms; f = 1kHz
Vripple = 200mV sine p-p
f = 217Hz (7)
f = 1kHz (7)
f = 217Hz (8)
f = 1kHz (8)
3 6 mA (max)
5 10
0.1 1 µA (max)
1.4 W (min)
1 0.9
0.05 %
83 dB (min)
90
83 71
83 71
CMRR
VOS
VSDIH
VSDIL
VSDIH
VSDIL
Common_Mode Rejection Ratio
Output Offset
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
f = 217Hz
VCM = 200mVDD
VIN = 0V
SD Mode = GND
SD Mode = GND
SD Mode = VDD
SD Mode = VDD
50
2
0.9
0.7
0.9
0.7
dB
mV
V
V
V
V
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics VDD = 3V state DC and AC
electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within
the Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good
indication of device performance.
(3) For DSBGA only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a
maximum of 2µA.
(4) Typicals are measured at 25°C and represent the parametric norm.
(5) Datasheet min/max specification limits are specified by design, test, or statistical analysis.
(6) When driving 4Ω loads from a 5V supply, the LM4898LD must be mounted to a circuit board with the exposed-DAP area soldered down
to a 1sq. in plane of 1oz. copper.
(7) Unterminated input.
(8) 10terminated input.
Copyright © 2003–2013, Texas Instruments Incorporated
Product Folder Links: LM4898 LM4898MMBD
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