Datasheet
LM49350, LM49350RLEVAL
SNAS359D –SEPTEMBER 2008–REVISED JUNE 2012
www.ti.com
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)
AUX Gain = 0dB
0.5 6 mV (max)
From Differential Mono Input
V
OS
Output Offset Voltage
DAC Gain = 0dB, From DAC Input
1 6 mV (max)
f
MCLK
= 12.288MHz, PLL off
T
WU
Turn-On Time PMC Clock = 300kHz 28 ms
AUXILIARY OUTPUTS
AUX_LINE_OUT
0.004 %
R
L
= 5kΩ, V
OUT
= 1V
RMS
THD+N Total Harmonic Distortion + Noise
Earpiece mode, f = 1kHz
0.08 %
R
L
= 32Ω BTL, P
OUT
= 20mW
Earpiece mode, f = 1kHz
P
OUT
Output Power 58 45 mW (min)
R
L
= 32Ω BTL, THD+N = 1%
V
RIPPLE
= 200mV
P-P
, f
RIPPLE
= 217Hz
Mono Input terminated, C
REF
= 1μF 100 dB
AUX_LINE_OUT
PSRR Power Supply Rejection Ratio
V
RIPPLE
= 200mV
P-P
, f
RIPPLE
= 217Hz
Mono Input terminated, C
REF
= 1μF 94 62 dB (min)
Earpiece mode
Gain = 0dB, V
REF
= V
OUT
(1%THD+N)
SNR Signal-to-Noise Ratio 100 dB
A-weighted, Mono Input Terminated
Gain = 0dB, V
REF
= V
OUT
(1%THD+N)
∈
OUT
Output Noise 13 μV
A-weighted, Mono Input Terminated
Gain = 0dB, From Mono Input
7 mV
AUX_LINE_OUT
V
OS
Output Offset Voltage
Gain = 0dB, From Mono Input
3 15 mV (max)
Earpiece mode
T
WU
Turn-On Time PMC Clock = 300kHz 28 ms
STEREO ADC
Differential Line Input
ADC Total Harmonic Distortion +
THD+N
ADC
V
IN
= 200mV
RMS
, f = 1kHz 0.03 %
Noise
Gain = 0dB
HPF On, f
S
= 48kHz
300 Hz
Lower -3dB Point
PB
ADC
ADC Passband
HPF On, Upper -3dB Point 0.41*f
S
kHz
R
ADC
ADC Ripple ADC Compensated 0.1 dB
Reference = V
OUT
(0dBFS )
Gain = 6dB, 90 dB
A-weighted From MIC, f
S
= 8kHz
SNR
ADC
ADC Signal-to-Noise Ratio
Reference = V
OUT
(0dBFS )
Gain = 0dB,
94 dB
A-weighted From Stereo Input,
f
S
= 48kHz
ADC
LEVEL
ADC Full Scale Input Level 1 V
RMS
STEREO DAC
I
2
S Input
DAC Total Harmonic Distortion +
THD+N
DAC
V
IN
= 500mFFS
RMS
, f = 1kHz 0.05 %
Noise
Gain = 0dB
DAC
LEVEL
DAC Full Scale Output Level 1 V
RMS
R
DAC
DAC Ripple 0.1 dB
PB
DAC
DAC Passband Upper –3dB Point 0.45*f
S
kHz
SNR
DAC
DAC Signal-to-Noise Ratio f
S
= 48kHz, A-weighted 96 dB
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