LM4937RL/NOPB National Semiconductor, LM4937RL/NOPB Datasheet - Page 6

• Manufacturer Part Number: LM4937RL/NOPB
• Description: IC AUDIO SUBSYSTM 1.25W 36USMDXT
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4937RL/NOPB

• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1.25W x 1 @ 8 Ohm; 80mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Differential Inputs, I²C, I²S, Mute, Shutdown, SPI, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMDxt
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4937RLTR

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I
I
P
V
THD+N
V
∈
Xtalk
T
DD
SD
O
WU
O
FS DAC
OS
Audio Amplifier Electrical Characteristics AV
The following specifications apply for the circuit shown in Figure 1 with all programmable gain set at 0dB, unless otherwise specified.
Limits apply for T
Symbol
PSRR
Supply Current
Shutdown Current
Output Power
Full Scale DAC Output
Total Harmonic Distortion
Offset Voltage
Output Noise
Power Supply Rejection Ratio
Crosstalk
Wake-Up Time
A
= 25°C.
Parameter
V
All Amps On + DAC, OCL (Note 11)
Headphone Mode Only (OCL)
Mono Loudspeaker Mode Only (Note 11)
Mono Earpiece Mode Only (Note 11)
DAC Off, All Amps On (OCL) (Note 11)
Speaker; THD = 1%;
f = 1kHz, 8Ω BTL
Headphone; THD = 1%;
f = 1kHz, 32Ω SE
Earpiece; THD = 1%;
f = 1kHz, 32Ω BTL
Speaker; P
f = 1kHz, 8Ω BTL
Headphone; P
f = 1kHz, 32Ω SE
Earpiece; P
f = 1kHz, 32Ω BTL; CD4 = 0
Speaker
Earpiece
HP (OCL)
A = weighted; 0dB gain;
See Table 1
f = 217Hz; V
C
Headphone; P
f = 1kHz; OCL
C
C
IN
B
B
B
= 2.2μF; See Table 3
= 2.2μF, CD6 = 0
= 2.2μF, CD6 = 1
= 0, No Load
O
O
ripple
= 500mW;
= 40mW;
6
O
O
= 15mW
Conditions
= 30mW;
= 200mV
DD
P-P
= 5.0V, DV
(Note 6)
Typical
Table 1
Table 3
DD
17.5
11.6
12.9
1.25
0.03
0.01
0.04
175
–56
130
5.8
1.6
2.4
80
10
45
5
8
8
LM4937
= 3.3V
(Notes 7,
Limits
8)
(Notes 1, 2)
mA (max)
mA (max)
mA (max)
mA (max)
mA (max)
mW (min)
mW (min)
mW (min)
μA (max)
(Limits)
Units
Vpp
mV
mV
mV
dB
ms
ms
%
%
%