Datasheet

LM49350, LM49350RLEVAL
www.ti.com SNAS359D –SEPTEMBER 2008–REVISED JUNE 2012
ELECTRICAL CHARACTERISTICS: A_V
DD
= LS_V
DD
= 3.3V; D_V
DD
= I/O_V
DD
=
1.8V
(1)(2)
(continued)
The following specifications apply for R
L(LS)
= 8Ω, R
L(HP)
= 32Ω, f = 1kHz, unless otherwise specified. Limits apply for T
A
=
25°C.
LM49350
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)
Auxiliary Input Amplifier Quiescent
AUXINI
DD
Stereo Auxiliary Inputs enabled 0.7 mA
Current
AUX_LINE_OUT enabled 0.5 mA
Auxiliary Output Amplifier Quiescent
AUXOUTI
DD
Current
Earpiece mode enabled 1.0 mA
LOUDSPEAKER AMPLIFIER
LS
EFF
Loudspeaker Efficiency P
O
= 400mW, R
L
= 8Ω 83 %
P
O
= 400mW, f = 1kHz,
THD+N Total Harmonic Distortion + Noise 0.07 %
R
L
= 8Ω, Mono Input Signal
R
L
= 8Ω, f = 1kHz, THD+N = 1%, Mono Input Signal
LS_V
DD
= 3.3V 495 400 mW (min)
LS_V
DD
= 4.2V 825 mW
LS_V
DD
= 5V 1.2 W
P
O
Output Power
R
L
= 4Ω, f = 1kHz, THD+N = 1%, Mono Input Signal
LS_V
DD
= 3.3V 800 mW
LS_V
DD
= 4.2V 1.4 W
LS_V
DD
= 5V 2 W
V
RIPPLE
= 200mV
P-P
f
RIPPLE
= 217Hz
PSRR Power Supply Rejection Ration 73 55 dB (min)
Mono Input Terminated
V
REF
= 1.0μF
Reference = V
OUT
(1% THD+N )
SNR Signal-to-Noise Ratio Gain = 0dB, A-weighted 95 85 dB (min)
Mono Input Terminated
e
OS
Gain = 0dB, A-weighted,
Output Noise 35 µV
Mono Input Terminated
V
OS
Offset Voltage Gain = 0dB, form Mono Input 10 50 mV (max)
T
WU
Turn-On Time PMC Clock = 300kHz 28 ms
HEADPHONE AMPLIFIERS
P
O
= 7.5mW, f = 1kHz,
THD+N Total Harmonic Distortion + Noise R
L
= 32Ω 0.025 0.1 % (max)
Stereo Analog Input Signal
R
L
= 32Ω, f = 1kHz, THD+N = 1%,
P
O
Headphone Output Power 69 60 mW (min)
Stereo Analog Input Signal
V
RIPPLE
= 200mV
P-P
, f
RIPPLE
= 217Hz
Stereo Analog Inputs Terminated,
PSRR Power Supply Rejection Ratio 97 75 dB (min)
V
REF
= 1.0μF, Mono Differential Input
Mode
Reference = V
OUT
(1% THD+N )
Gain = 0dB, A-weighted 106 98 dB (min)
Stereo Inputs Terminated
SNR Signal-to-Noise Ratio
Reference = V
OUT
(0dBFS ) Gain =
0dB, 96 90 dB (min)
A-weighted, I
2
S Input = Digital Zero
Gain = 0dB, A-weighted,
8 µV
Stereo Inputs Terminated
e
OS
Output Noise
Gain = 0dB, A-weighted,
16 µV
I
2
S Input = Digital Zero
P
O
= 60mW, f = 1kHz,
X
TALK
Crosstalk R
L
= 32Ω 71 dB
Stereo Analog Input Signal
ΔA
CH-CH
Channel-to-Channel Gain Matching 0.03 dB
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