If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (Note 1)
Storage Temperature
Voltage at Any Input Pin
6.0V
−65°C to +150°C
Thermal Resistance
220°C/W
θ
JA
(micro SMD)
Soldering Information
See AN-1112 "microSMD Wafers Level Chip Scale
Package."
V
DD
+ 0.3V
≥
V
≥
GND - 0.3V
Power Dissipation (Note 3)
Internally Limited
ESD Susceptibility, all other pins (Note 4)
2.0kV
ESD Susceptibility (Note 5)
200V
Junction Temperature (T
JMAX
)
150°C
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
(Notes 1, 2)
−40°C
≤
T
A
≤
85°C
2.4V
≤
V
DD
≤
5.5V
Electrical Characteristics
(Notes 1, 2)
The following specifications apply for A
V
= 2V/V (R
I
= 150kΩ), R
L
= 15µH + 8Ω
+ 15µH
unless otherwise specified. Limits apply for
T
A
= 25°C.
LM4671
Symbol
Parameter
Conditions
V
I
= 0V, A
V
= 2V/V,
V
DD
= 2.4V to 5.0V
Typical
(Note 6)
|V
OS
|
Differential Output Offset Voltage
5
61
68
17
0.9
6.4
3.8
2.0
0.01
1.2
1.1
V
SHUTDOWN
= 0.4V
100
300kΩ/R
I
300
R
L
= 15μH
+ 4Ω
+ 15μH
THD = 10% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V
V
DD
= 3.6V
V
DD
= 2.5V
R
L
= 15μH
+ 4Ω
+ 15μH
THD = 1% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V
V
DD
= 3.6V
V
DD
= 2.5V
270kΩ/R
I
330kΩ/R
I
6.2
3.0
1
1.4
0.4
100
5
Limit
(Notes 7, 8)
Units
(Limits)
mV (max)
dB (min)
dB (min)
μA
(max)
μA
(max)
mA (max)
mA
mA (max)
μA
(max)
V (min)
V (max)
kΩ
V/V (min)
V/V (max)
kΩ
PSRR
GSM
GSM Power Supply Rejection Ratio V
DD
= 2.4V to 5.0V
CMRR
GSM
|I
IH
|
|I
IL
|
I
DD
V
DD
= 2.4V to 5.0V
GSM Common Mode Rejection Ratio V
IC
= V
DD
/2 to 0.5V,
V
IC
= V
DD
/2 to V
DD
– 0.8V
Logic High Input Current
Logic Low Input Current
Quiescent Power Supply Current
V
DD
= 5.0V, V
I
= 5.5V
V
DD
= 5.0V, V
I
= –0.3V
V
IN
= 0V, No Load, V
DD
= 5.0V
V
IN
= 0V, No Load, V
DD
= 3.6V
V
IN
= 0V, No Load, V
DD
=2.4V
I
SD
V
SDIH
V
SDIL
R
OSD
A
V
R
SD
Shutdown Current
Shutdown voltage input high
Shutdown voltage input low
Output Impedance
Gain
Resistance from Shutdown Pin to
GND
V
SHUTDOWN
= 0V
V
DD
= 2.4V to 5.0V
P
O
Output Power
2.5
1.3
520
W
W
mW
2.21
1.06
420
W
W
mW
3
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LM4671
LM4671
Symbol
Parameter
Conditions
R
L
= 15μH
+ 8Ω
+ 15μH
THD = 10% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V
V
DD
= 3.6V
P
O
Output Power
V
DD
= 2.5V
R
L
= 15μH
+ 8Ω
+ 15μH
THD = 1% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V
V
DD
= 3.6V
V
DD
= 2.5V
V
DD
= 5V, P
O
= 0.1W
RMS
,
f = 1kHz
THD+N
Total Harmonic Distortion + Noise
V
DD
= 3.6V, P
O
= 0.1W
RMS
,
f = 1kHz
V
DD
= 3.6V, P
O
= 0.1W
RMS
,
f = 5kHz
V
DD
= 3.6V, P
O
= 0.1W
RMS
,
f = 10kHz
V
DD
= 3.6V, 5V
V
Ripple
= 200mV
PP
Sine,
f
Ripple
= 217Hz
Inputs to AC GND, C
I
= 2μF
V
DD
= 3.6V, 5V
V
Ripple
= 200mV
PP
Sine,
f
Ripple
= 1kHz
PSRR
Power Supply Rejection Ratio
Inputs to AC GND, C
I
= 2μF
V
DD
= 3.6V, 5V
V
Ripple
= 200mV
PP
Sine,
f
Ripple
= 10kHz
Inputs to AC GND, C
I
= 2μF
V
DD
= 3.6V, 5V
V
Ripple
= 200mV
PP
Sine,
f
Ripple
= 217Hz
f
IN
= 1kHz, P
O
= 10mW
RMS
SNR
Signal to Noise Ratio
V
DD
= 5V, P
O
= 1W
RMS
V
DD
= 3.6V, f = 20Hz – 20kHz
ε
OUT
Output Noise
Inputs to AC GND, C
I
= 2μF
No Weighting
V
DD
= 3.6V, Inputs to AC GND
C
I
= 2μF,
A Weighted
CMRR
T
WU
T
SD
Common Mode Rejection Ratio
Wake-up Time
Shutdown Time
V
DD
= 3.6V, V
Ripple
= 1V
PP
Sine
f
Ripple
= 217Hz
V
DD
= 3.6V
58
1.19
700
350
0.09
0.04
0.12
0.05
600
1.7
870
425
Typical
(Note 6)
Limit
(Notes 7, 8)
Units
(Limits)
W
mW
mW
W
mW
mW
%
%
%
%
61.8
dB
59.8
dB
48.7
dB
65.7
dB
93
dB
μV
RMS
μV
RMS
dB
49
μs
(max)
μs
38
68.3
17
140
www.national.com
4
LM4671
Note 1:
All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2:
Absolute Maximum Ratings
indicate limits beyond which damage to the device may occur.
Operating Ratings
indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Electrical Characteristics
state DC and AC electrical specifications under particular test conditions
which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters
where no limit is given, however, the typical value is a good indication of device performance.
Note 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
, θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/θ
JA
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4671, T
JMAX
= 150°C.
The typical
θ
JA
is 220°C/W for the microSMD package.
Note 4:
Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 5:
Machine Model, 220pF–240pF discharged through all pins.
Note 6:
Typical specifications are specified at 25°C and represent the parametric norm.
Note 7:
Tested limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 8:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
Shutdown current is measured in a normal room environment. Exposure to direct sunlight will increase I
SD
by a maximum of 2µA. The Shutdown pin
should be driven as close as possible to GND for minimal shutdown current and to V
DD
for the best THD performance in PLAY mode. See the
Application
Information
section under SHUTDOWN FUNCTION for more information.
Note 10:
The performance graphs were taken using the Audio Precision AUX-0025 Switching Amplifier measurement Filter in series with the LC filter on the
demo board.
External Components Description
(Figure
1)
Components
1.
2.
C
S
C
I
Functional Description
Supply bypass capacitor which provides power supply filtering. Refer to the
Power Supply Bypassing
section
for information concerning proper placement and selection of the supply bypass capacitor.
Input AC coupling capacitor which blocks the DC voltage at the amplifier's input terminals.
