LM4947TL National Semiconductor, LM4947TL Datasheet - Page 8

• Manufacturer Part Number: LM4947TL
• Manufacturer: National Semiconductor

Specifications of LM4947TL

• Operational Class: Class-D
• Audio Amplifier Output Configuration: 1-Channel Mono/2-Channel Stereo
• Audio Amplifier Function: Headphone/Speaker
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): 3/5V
• Power Supply Requirement: Triple
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 76dB
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): 2.2/2.7V
• Dual Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 25
• Package Type: uSMD
• Lead Free Status / Rohs Status: Not Compliant

www.national.com
PSRR
η
CMRR
XTALK
T
Symbol
WU
Power Supply Rejection Ratio
Loudspeaker out
Power Supply Rejection Ratio
R
Class D Efficiency
Common-Mode Rejection Ratio
Crosstalk
Wake-Up Time from Shutdown
Volume Control Step Size Error
Digital Volume Range
Mute Attenuation
MONO_IN Input Impedance
R
OUT
IN
and L
and L
IN
OUT
Input Impedance
Parameter
V
R
All audio inputs terminated to GND;
output referred
BTL, Output Mode 1
BTL, Output Mode 3
BTL, Output Mode 5
BTL, Output Mode 7
V
R
All audio inputs terminated to GND;
output referred
SE, Output Mode 2
SE, Output Mode 4
SE, Output Mode 6
OCL, Output Mode 2
OCL, Output Mode 4
OCL, Output Mode 6
Output Mode 1, 3, 5
f = 1kHz, V
Mode 1, BTL, R
Headphone, P
OCL, Mode 4
Headphone, P
SE, Mode 4
C
C
Input referred maximum attenuation
Input referred maximum gain
Output Mode 1, 3, 5
Maximum gain setting
Maximum attenuation setting
RIPPLE
RIPPLE
L
L
B
B
= 8Ω, C
= 32Ω, C
= 2.2μF, OCL, R
= 2.2μF, SE, R
= 200mV
= 200mV
B
CM
B
= 2.2µF, BTL
= 2.2µF, BTL
= 1Vpp, 0dB gain,
O
O
Conditions
L
= 30mW, f = 1kHz,
= 30mW, f = 1kHz,
PP
PP
= 8Ω
8
L
; f = 217Hz,
; f = 217Hz,
L
= 32Ω
= 32Ω
(Note 4)
Typical
-59.5
±0.2
–49
–55
–72
116
150
+18
100
70
61
64
61
72
70
65
76
72
70
86
90
11
LM4947
(Note 5)
Limits
kΩ (max)
kΩ (max)
dB (min)
kΩ (min)
kΩ (min)
(Limits)
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ms
ms
dB
dB
dB
%