LM49450SQ/NOPB National Semiconductor, LM49450SQ/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM49450SQ/NOPB
• Description: IC AUDIO SUBSYSTEM 2.5W D 32LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class Dr

Specifications of LM49450SQ/NOPB

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 2.5W x 2 @ 4 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: 3D, DAC, Depop, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 32-LLP
• Amplifier Class: D
• No. Of Channels: 2
• Output Power: 1.2W
• Supply Voltage Range: 2.7V To 5.5V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: LLP
• Rohs Compliant: Yes
• For Use With: LM49450SQEVAL - BOARD EVAL FOR LM49450
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49450SQ; LM49450SQ; LM49450SQTR

η
Xtalk
SNR
A
Mute
ΔA
ε
t
t
AUDIO INTERFACE TIMING
t
t
t
t
t
t
t
t
t
CONTROL INTERFACE TIMING
1
ON
OFF
MCLKL
MCLKH
MCLKY
BCLKR
BCLKCF
BCLKDS
DL
DST
DHT
OS
V
Timing Characteristics
8Ω, R
CH-CH
Symbol
Symbol
L(HP)
= 32Ω, f = 1kHz, unless otherwise specified. Limits apply for T
Efficiency
Crosstalk
Signal to Noise Ratio
Digitally Controlled Gain Level
Mute Attenuation
Channel-to-Channel Gain
Matching
Output Noise
Turn-On Time
Turn-Off Time
MCLK Pulse Width Low
MCLK Pulse Width High
MCLK Period
BCLK Rise Time
BCLK Fall Time
BCLK Duty Cycle
LRC Propagation Delay from
BCLK falling edge
DATA Setup Time to BCLK Rising
Edge
DATA Hold Time from BCLK
Rising Edge
SCLK Frequency
Hold Time (repeated START
Condition)
Parameter
Parameter
(Notes 2, 8)
P
R
P
DAC Active,
Line Inputs Active
P
DAC Active,
Line Inputs Active
P
DAC Active, Internal Reference
DAC Active, External Reference
Line Inputs Active
Maximum Gain Setting, Line Inputs
Active
Minimum Gain Setting, Line Inputs
Active
Line Inputs Active
Input Referred, A-weighted
DAC Active, Internal Reference
DAC Active, External Reference
Line Inputs Active
O
O
O
O
L
= 8Ω
= TBDmW, f = 1kHz
= 500mW, f = 1kHz, R
= 500mW, f = 10kHz, R
= 500mW, f = 1kHz, A-weighted
The following specifications apply for Headphone: A
Conditions
Conditions
7
A
= 25°C.
L
L
= 8Ω
= 8Ω
(Note 6)
(Note 6)
Typical
Typical
24.2
–48
–92
0.3
80
74
79
60
60
88
89
98
60
85
40
27
50
1
LM49450
LM49450
(Note 7)
(Note 7)
Limit
Limit
22.5
24.2
–49
–46
V
400
0.6
16
16
32
10
10
10
3
3
= 0dB, R
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L(LS)
ns (max)
ns (min)
ns (min)
kHz (max)
μs (min)
dB (max)
dB (max)
ns (max)
ns (max)
dB (min)
dB (min)
(Limits)
(Limits)
ns (min)
ns (min)
ns (min)
Units
Units
ms
ms
dB
dB
dB
dB
dB
dB
dB
dB
dB
μV
μV
μV
=
%
%