LM49450SQ/NOPB National Semiconductor, LM49450SQ/NOPB Datasheet - Page 6

• 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

www.national.com
A
Mute
ΔA
ε
V
t
t
HEADPHONE SENSE INPUT (HPS)
V
V
DIGITAL INTERFACE
V
V
V
V
SPEAKER AMPLIFIERS (Headphone Amplifiers Disabled, HPS = 0)
I
V
P
THD+N
PSRR
ON
OFF
DDLS
OS
V
OUT_FS
IH
IL
IH
IL
OH
OL
OS
OUT
Electrical Characteristics V
Headphone: A
CH-CH
Symbol
Symbol
V
Digitally Controlled Gain Level
Mute Attenuation
Channel-to-Channel Gain
Matching
Output Noise
Full-Scale Headphone Amplifier
Output Voltage
Turn-On Time
Turn-Off Time
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Analog Supply Current
Output Offset Voltage
Output Power
Total Harmonic Distortion
Power Supply Rejection Ratio
= 0dB, R
L(LS)
Parameter
Parameter
= 8Ω, R
L(HP)
= 32Ω, f = 1kHz, unless otherwise specified. Limits apply for T
DD
= LSV
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
R
f
Line Inputs Active
DAC Voltage
AV = 0dB, Line Inputs Active
R
THD+N = 1%
THD+N = 10%
R
THD+N = 1%
THD+N = 10%
P
DAC Active
Line Inputs Active
V
DAC Active, Internal Reference
DAC Active, External Reference
Line Inputs Active
S
O
RIPPLE
L
L
L
= 48kHz, DAC Active
= No Load
= 4Ω, f = 1kHz
= 8Ω, f = 1kHz
= 635mW, f = 1kHz, R
= 200mV
DD
Conditions
Conditions
6
= 5.0V
P-P
, f = 1kHz
L
(Notes 2, 8)
= 8Ω
(Note 6)
(Note 6)
Typical
Typical
–53.8
–102
17.8
The following specifications apply for
10.4
1.25
1.54
0.06
0.04
942
0.3
0.6
1.9
2.5
10
10
10
27
14
15
12
60
60
70
1
1
LM49450
LM49450
A
(Note 7)
(Note 7)
= 25°C.
Limit
Limit
17.0
18.5
–56
–52
850
2.8
0.8
18
16
50
48
2
1
mA (max)
mA (max)
mV (max)
mV (max)
mW (min)
dB (max)
dB (max)
dB (min)
dB (min)
(Limits)
V (max)
V (max)
(Limits)
mV
V (min)
V (min)
Units
Units
(min)
ms
ms
dB
dB
μV
μV
μV
dB
dB
dB
W
W
W
%
%
V
V
RMS