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)
MIC BIAS
V
BIAS
Microphone Bias Voltage MIC input selected 2.2 V
VOLUME CONTROL
Minimum Gain –46.5 dB
VCR
AUX
Stereo Input Volume Control Range
Maximum Gain 12 dB
Minimum Gain –76.5 dB
VCR
DAC
DAC Volume Control Range
Maximum Gain 18 dB
Minimum Gain –76.5 dB
VCR
ADC
ADC Volume Control Range
Maximum Gain 18 dB
Minimum Gain 6 dB
VCR
MIC
MIC Volume Control Range
Maximum Gain 36 dB
SS
AUX
AUX Volume Control Stepsize 1.5 dB
SS
DAC
DAC Volume Control Stepsize 1.5 dB
SS
ADC
DAC Volume Control Stepsize 1.5 dB
SS
MIC
MIC Volume Control Stepsize 2 dB
SV
AUX
AUX Volume Setting Variation ±1 dB (max)
SV
MIC
MIC Volume Setting Variation ±1 dB (max)
ANALOG INPUTS
AUXR Gain = 12dB 17.5 kΩ
AUXR_R
IN
Right Auxiliary Input Impedance AUXR Gain = 0dB 38 kΩ
AUXR Gain = –46.5dB 64 kΩ
AUXL Gain = 12dB 17.5 kΩ
AUXL_R
IN
Right Auxiliary Input Impedance AUXL Gain = 0dB 38 kΩ
AUXL Gain = –46.5dB 64 kΩ
MICR_R
IN
Right Microphone Input Impedance All MIC gain settings 50 kΩ
MICL_R
IN
Left Microphone Input Impedance All MIC gain settings 50 kΩ
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