Datasheet

LM4990
SNAS184E –DECEMBER 2002–REVISED MAY 2013 www.ti.com
Electrical Characteristics V
DD
= 3V
(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 2 7 mA (max)
I
DD
Quiescent Power Supply Current
V
IN
= 0V, I
o
= 0A, 8Ω Load 3 9 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
1.1 V
V
SDIL
Shutdown Voltage Input Low V
SD MODE
= V
DD
0.9 V
V
SDIH
Shutdown Voltage Input High V
SD MODE
= GND 1.3 V
V
SDIL
Shutdown Voltage Input Low V
SD MODE
= GND 1.0 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 425 mW
P
o
Output Power
(4Ω) THD+N = 1% (max); f = 1kHz 600 mW
T
WU
Wake-up time 75 ms
THD+N Total Harmonic Distortion+Noise P
o
= 0.25Wrms; f = 1kHz 0.1 %
+N
V
ripple
= 200mV sine p-p 62 (f = 217Hz)
PSRR Power Supply Rejection Ratio 55 dB (min)
Input terminated with 10Ω 68 (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.
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