LM4985TM/NOPB National Semiconductor, LM4985TM/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM4985TM/NOPB
• Description: IC AMP AUDIO PWR .135W AB 12USMD
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4985TM/NOPB

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 135mW x 2 @ 16 Ohm
• Voltage - Supply: 2.3 V ~ 5.5 V
• Features: I²C, Shutdown, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 12-MicroSMD
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 135x2@16OhmW
• Audio Amplifier Function: Headphone
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 77dB
• Single Supply Voltage (min): 2.3V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 12
• For Use With: LM4985TMEVAL - BOARD EVALUATION LM4985TM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4985TMTR

THD+N
V
PSRR
Xtalk
T
R
A
A
∆A
V
WU
ON
IN
VMIN
VMAX
OS
Electrical Characteristics V
The following specifications apply for R
25˚C.
V
Symbol
Total Harmonic Distortion + Noise
Output Noise Voltage
Power Supply Rejection Ratio
Channel-to-Channel Crosstalk
Wake Up Time from Shutdown
Input Resistance
Minimum Gain
Maximum Gain
Gain Accuracy per Step
Output Offset Voltage
Parameter
L
= 16Ω, f = 1kHz, and C
DD
= 3.6V
R
R
R
R
V
V
f
f
P
P
C
WT1 = 0, WT0 = 0
WT1 = 0, WT0 = 1
WT1 = 1, WT0 = 0
WT1 = 1, WT0 =1
Stereo mode
Mono mode
Code = 00000
Code = 11111
18dB ≥ A
–44dB ≥ A
OCL
R
V
IN
IN
IN
RIPPLE
out
out
IN
LOAD
LOAD
LOAD
LOAD
BYPASS
LOAD
OCL
C-CUPL
OCL
C-CUPL
R
R
R
R
OCL
C-CUPL
OCL
C-CUPL
OCL
C-CUPL
OCL
C-CUPL
= 217Hz sinewave
= 1kHz sinewave
LOAD
LOAD
LOAD
LOAD
= AC GND, A
= AC GND
= 40mW. OCL
= 50mW. C-CUPL
= 16Ω OCL, P
= 16Ω C-CUPL, P
= 32Ω OCL, P
= 32Ω C-CUPL, P
= 32Ω
= 200mVp-p (Note 9)
= 32Ω
= 32Ω
= 4.7µF (Note 11)
(Notes 1, 2) (Continued)
= 16Ω
= 16Ω
V
7
V
≥–44dB
B
>
Conditions
= 4.7µF unless otherwise specified. Limits apply to T
–76dB
V
= 0dB, A-weighted
O
O
= 60mW
= 33mW
O
O
= 60mW
= 38mW
(Note 6)
±
±
1532
0.06
0.03
0.03
0.03
Typ
222
405
143
774
246
–76
2.0
15
77
63
76
62
51
56
58
69
66
92
20
10
18
0.5
1.0
LM4985
(Notes 7,
Limit
±
±
–72
55
57
93
17
20
8)
1.0
2.0
www.national.com
mV (max)
dB (max)
dB (min)
dB (min)
(Limits)
A
Units
msec
=
µV
dB
dB
kΩ
dB
%