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LM49321 Folha de dados(PDF) 7 Page - Texas Instruments

Nome de Peças LM49321
Descrição Electrónicos  LM49321 Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

LM49321 Folha de dados(HTML) 7 Page - Texas Instruments

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LM49321, LM49321RLEVAL
www.ti.com
SNAS457C – SEPTEMBER 2008 – REVISED MAY 2013
Audio Amplifier Electrical Characteristics AVDD = 5.0V, DVDD = 3.3V
(1) (2)
The following specifications apply for the circuit shown in Figure 41 with all programmable gain set at 0dB, unless otherwise
specified. Limits apply for TA = 25°C.
LM49321
Units
Parameter
Test Conditions
(Limits)
Typ(3)
Limits(4)
VIN = 0, No Load
17.5
mA (max)
All Amps On + DAC, OCL(5)
Headphone Mode Only, OCL, DAC Off
5.8
mA (max)
Headphone Mode Only, OCL, DAC Off
STEREO_OUTPUT_ONLY = 1,
5.5
mA
STEREO_INPUT_ONLY = 1
IDD
Supply Current
Headphone Mode Only, OCL, DAC On,
OSR = 64, DAC_INPUT_ONLY = 1
9.5
mA
STEREO_OUTPUT_ONLY = 1
Mono Loudspeaker Mode Only(5)
11.6
mA
Mono Earpiece Mode Only(5)
5
mA
DAC Off, All Amps On (OCL)(5)
12.9
mA
ISD
Shutdown Current
See(6)
1.6
μA
Speaker; THD = 1%; f = 1kHz, 8
Ω BTL
1.25
mW
PO
Output Power
Headphone; THD = 1%; f = 1kHz, 32
Ω SE
80
mW
Earpiece; THD = 1%; f = 1kHz, 32
Ω BTL
175
mW
VFS DAC
Full Scale DAC Output
2.4
VRMS
Speaker; PO = 500mW; f = 1kHz, 8Ω BTL
0.03
%
THD+N
Total Harmonic Distortion + Noise
Headphone; PO = 30mW; f = 1kHz, 32Ω SE
0.01
%
Earpiece; PO = 40mW; f = 1kHz, 32Ω BTL
0.04
%
Speaker
10
mV
VOS
Offset Voltage
Earpiece
8
mV
HP (OCL)
8
mV
O
Output Noise
A-weighted; 0dB gain;
Table 1
PSRR
Power Supply Rejection Ratio
f = 217Hz; Vripple = 200mVP-P, CB = 2.2μF
Table 3
XTALK
Crosstalk
Headphone; PO= 15mW, f = 1kHz; OCL
–56
dB
CB = 2.2μF, CD_6 = 0
45
ms
TWU
Wake-Up Time
CB = 2.2μF, CD_6 = 1
130
ms
(1)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of
device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or
other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating
Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. All
voltages are measured with respect to the ground pin, unless otherwise specified.
(2)
The Electrical Characteristics tables list specified specifications under the listed Recommended Operating Conditions except as
otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and
are not ensured.
(3)
Typical values represent most likely parametric norms at TA = +25ºC, and at the Recommended Operation Conditions at the time of
product characterization and are not ensured.
(4)
Datasheet min/max specification limits are ensured by test or statistical analysis.
(5)
Enabling mono bit (MONO_ONLY in Output Control Register 01h) will save 400
μA (typ) form specified current.
(6)
Shutdown current is measured in a normal room environment.
Copyright © 2008–2013, Texas Instruments Incorporated
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