Datasheet

LM4990
www.ti.com SNAS184E –DECEMBER 2002–REVISED MAY 2013
Electrical Characteristics V
DD
= 5V
(1)(2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
= 25°C.
LM4990
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)(5)
V
IN
= 0V, I
o
= 0A, No Load 3 7 mA (max)
I
DD
Quiescent Power Supply Current
V
IN
= 0V, I
o
= 0A, 8Ω Load 4 10 mA (max)
I
SD
Shutdown Current V
SD
= V
SD Mode
(6)
0.1 2.0 µA (max)
V
SDIH
Shutdown Voltage Input High V
SD MODE
= V
DD
1.5 V
V
SDIL
Shutdown Voltage Input Low V
SD MODE
= V
DD
1.3 V
V
SDIH
Shutdown Voltage Input High V
SD MODE
= GND 1.5 V
V
SDIL
Shutdown Voltage Input Low V
SD MODE
= GND 1.3 V
V
OS
Output Offset Voltage 7 50 mV (max)
R
OUT
9.7 kΩ (max)
Resistor Output to GND
(7)
8.5
7.0 kΩ (min)
(8Ω) THD+N = 1% (max); f = 1kHz 1.25 0.9 W (min)
P
o
Output Power
(4Ω)
(8)(9)
THD+N = 1% (max); f = 1kHz 2 W
T
WU
Wake-up time 100 ms
THD+N Total Harmonic Distortion+Noise P
o
= 0.5Wrms; f = 1kHz 0.2 %
+N
V
ripple
= 200mV sine p-p 60 (f = 217Hz)
PSRR Power Supply Rejection Ratio 55 dB (min)
Input terminated with 10Ω 64 (f = 1kHz)
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional but specific performance is not ensured. Electrical Characteristics state DC and AC
electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within
the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good
indication of device performance.
(2) All voltages are measured with respect to the ground pin, unless otherwise specified.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to AOQL (Average Outgoing Quality Level).
(5) Datasheet min/max specification limits are specified by design, test, or statistical analysis.
(6) For DSBGA only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I
SD
by a
maximum of 2µA.
(7) R
ROUT
is measured from the output pin to ground. This value represents the parallel combination of the 10kΩ output resistors and the
two 20kΩ resistors.
(8) The Exposed-DAP of the NGZ0010B package should be electrically connected to GND or an electrically isolated copper area. the
LM4990LD demo board has the Exposed-DAP connected to GND with a PCB area of 86.7mils x 585mils (2.02mm x 14.86mm) on the
copper top layer and 550mils x 710mils (13.97mm x 18.03mm) on the copper bottom layer.
(9) The thermal performance of the WSON and exposed-DAP MSOP-PowerPAD packages when used with the exposed-DAP connected to
a thermal plane is sufficient for driving 4Ω loads. The VSSOP and DSBGA packages do not have the thermal performance necessary
for driving 4Ω loads with a 5V supply and is not recommended for this application.
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