LM49450SQ/NOPB National Semiconductor, LM49450SQ/NOPB Datasheet - Page 5

• 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

SNR
A
Mute
ΔA
ε
t
t
HEADPHONE AMPLIFIERS (Speaker Amplifiers Disabled, HPS = 1)
I
V
P
THD+N
PSRR
Xtalk
SNR
ON
OFF
DDHP
OS
V
OS
O
CH-CH
Symbol
Signal to Noise Ratio
Digitally Controlled Gain Level
Mute Attenuation
Channel-to-Channel Gain
Matching
Output Noise
Turn-On Time
Turn-Off Time
Analog Supply Current
Output Offset Voltage
Output Power
Total Harmonic Distortion
Power Supply Rejection Ratio
Crosstalk
Signal to Noise Ratio
Parameter
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
f
Line Inputs Active
DAC active, A
Line Inputs Active, , A
R
THD+N = 1%, Single Channel
THD+N = 1%, Two Channels in
Phase
R
THD+N = 1%, Single Channel
THD+N = 1%, Two Channels in
Phase
f = 1kHz, DAC Active
R
R
V
DAC Active, Internal Reference
DAC Active, External Reference
Line Inputs Active
P
DAC Active,
Line Inputs Active
P
DAC Active,
Line Inputs Active
P
DAC Active, Internal Reference
DAC Active, External Reference
Line Inputs Active
S
O
RIPPLE
O
O
O
L
L
L
L
= 48kHz, DAC active
= 16Ω, f = 1kHz
= 32Ω, f = 1kHz
= 16Ω, P
= 32Ω, P
= 500mW, f = 1kHz, A-weighted
= 5mW, f = 1kHz, R
= 5mW, f = 10kHz, R
= 5mW, f = 1kHz, A-weighted
= 200mV
Conditions
O
O
5
= 5mW
= 5mW
V
= –6dB
P-P
, f = 1kHz
V
L
= –6dB
L
= 32Ω
= 32Ω
(Note 6)
Typical
23.6
43.5
45.4
0.05
0.03
71.2
71.3
76.9
–48
–91
102
0.3
7.2
5.3
89
92
90
40
27
66
34
49
36
82
79
78
76
99
98
1
7
5
LM49450
(Note 7)
Limit
22.5
24.1
8.25
–49
–46
6.5
30
42
27
56
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dB (min)
dB
dB
mA (max)
mA (max)
mV (max)
mW (min)
mW (min)
dB (max)
dB (max)
dB (min)
dB (min)
(Limits)
Units
mW
mW
mV
ms
ms
dB
dB
dB
dB
dB
μV
μV
μV
dB
dB
dB
dB
dB
dB
dB
%
%