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LM49450 데이터시트(PDF) 8 Page - Texas Instruments

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부품명 LM49450
상세설명  Boomer I2S Input, 2.5W/Channel, Low EMI, Stereo, Class D Audio Sub-System with Ground Referenced Headphone Amplifier, 3D Enhancement, and Headphone Sense
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홈페이지  http://www.ti.com
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LM49450 데이터시트(HTML) 8 Page - Texas Instruments

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LM49450
SNAS440D – FEBRUARY 2008 – REVISED MAY 2013
www.ti.com
Electrical Characteristics VDD = LSVDD = 5.0V
(1)(2) (continued)
The following specifications apply for Headphone: AV = 0dB, RL(LS) = 8Ω, RL(HP) = 32Ω, f = 1kHz, unless otherwise specified.
Limits apply for TA = 25°C.
LM49450
Units
Symbol
Parameter
Conditions
(Limits)
Typical(3)
Limit(4)
PO = 500mW, f = 1kHz, RL = 8Ω
DAC Active,
74
dB
Line Inputs Active
79
dB
Xtalk
Crosstalk
PO = 500mW, f = 10kHz, RL = 8Ω
DAC Active,
60
dB
Line Inputs Active
60
dB
PO = 500mW, f = 1kHz, A-weighted
DAC Active, Internal Reference
88
dB
SNR
Signal to Noise Ratio
DAC Active, External Reference
89
dB
Line Inputs Active
98
dB
Maximum Gain Setting, Line Inputs
22.5
dB (min)
24.2
Active
24.2
dB (max)
AV
Digitally Controlled Gain Level
Minimum Gain Setting, Line Inputs
–49
dB (min)
–48
Active
–46
dB (max)
Mute
Mute Attenuation
Line Inputs Active
–92
dB
Channel-to-Channel Gain
ΔACH-CH
0.3
dB
Matching
Input Referred, A-weighted
DAC Active, Internal Reference
60
μV
εOS
Output Noise
DAC Active, External Reference
85
μV
Line Inputs Active
40
μV
tON
Turn-On Time
27
ms
tOFF
Turn-Off Time
1
ms
Timing Characteristics
(1) (2)
The following specifications apply for Headphone: AV = 0dB, RL(LS) = 8Ω, RL(HP) = 32Ω, f = 1kHz, unless otherwise specified.
Limits apply for TA = 25°C.
LM49450
Units
Symbol
Parameter
Conditions
(Limits)
Typical(3)
Limit(4)
AUDIO INTERFACE TIMING
tMCLKL
MCLK Pulse Width Low
16
ns (min)
tMCLKH
MCLK Pulse Width High
16
ns (min)
tMCLKY
MCLK Period
32
ns (min)
tBCLKR
BCLK Rise Time
3
ns (max)
tBCLKCF
BCLK Fall Time
3
ns (max)
tBCLKDS
BCLK Duty Cycle
50
%
LRC Propagation Delay from
ns (max)
tDL
10
BCLK falling edge
DATA Setup Time to BCLK Rising
10
ns (min)
tDST
Edge
(1)
The Electrical Characteristics tables list ensured 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.
(2)
RL is a resistive load in series with two inductors to simulate an actual speaker load. For RL = 8Ω, the load is 15µH + 8Ω +15µH. For RL
= 4
Ω, the load is 15µH + 4Ω + 15µH.
(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 specified by test or statistical analysis.
8
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