LM4857SPBD National Semiconductor, LM4857SPBD Datasheet - Page 8

• Manufacturer Part Number: LM4857SPBD
• Description: BOARD EVALUATION LM4857SP
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM4857SPBD

• Amplifier Type: Class AB
• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.6W x 2 @ 4 Ohm; 75mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM4857
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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P
THD+N
V
N
PSRR
Symbol
O
OS
OUT
Audio Amplifier Electrical Characteristics V
The following specifications apply for V
Output Power
Total Harmonic Distortion Plus
Noise
Offset Voltage
Output Noise
Power Supply Rejection Ratio
Parameter
DD
Speaker; THD+N = 1%;
f = 1kHz; 8Ω BTL
Headphone; THD+N = 1%;
f = 1kHz; 32Ω SE
Earpiece; THD+N = 1%;
f = 1kHz; 32Ω BTL; CD4 = 0
Earpiece; THD+N = 1%;
f = 1kHz; 32Ω BTL; CD4 = 1
LD5 = RD5 = 0
Speaker; P
f = 1kHz; 8Ω BTL
Headphone; P
f = 1kHz; 32Ω SE
Earpiece; P
f = 1kHz; 32Ω BTL; CD4 = 0
Line Out; V
f = 1kHz; 5kΩ SE
Speaker; LD5 = RD5 = 0
Earpiece; LD5 = RD5 = 0
A-weighted; 0dB gain; (Note 11)
LD5 = RD5 = 0; All Inputs Terminated
Speaker; Mode 2, 3, 7, 8
Speaker; Mode 12, 13
Headphone; Mode 3, 4, 8, 9
Headphone; Mode 13, 14
Earpiece; Mode 1
Earpiece; Mode 6
Earpiece; Mode 11
Line Out; Mode 5
Line Out; Mode 10
Line Out; Mode 15
f = 217Hz, V
0dB gain; (Note 11)
LD5 = RD5 = 0; All Audio Inputs
Terminated
Speaker; Mode 2, 3, 7, 8
Speaker; Mode 12, 13,
Headphone; Mode 3, 4, 8, 9
Headphone; Mode 13, 14
Earpiece; Mode1
Earpiece; Mode 6
Earpiece; Mode 11
Line Out; Mode 5
Line Out; Mode 10
Line Out; Mode 15
= 3.0V, unless otherwise specified. Limits apply for T
O
O
O
= 200mW;
rip
= 1V
=10mW;
O
Conditions
= 200mV
= 10mW;
RMS
8
;
pp
; C
B
DD
= 2.2µF;
= 3.0V
(Note 6)
Typical
0.015
(Notes 1, 2) (Continued)
0.05
0.04
0.06
400
25
30
30
27
38
10
14
13
18
21
11
14
17
70
65
87
75
76
70
67
88
74
71
5
5
LM4857
A
= 25˚C.
Limits (Notes
7, 8)
320
20
22
40
30
55
62
57
58
mW (min)
mW (min)
mW (min)
mV (max)
mV (max)
dB (min)
dB (min)
dB (min)
dB (min)
(Limits)
Units
mW
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
dB
dB
dB
dB
dB
dB
%
%
%
%