Datasheet

LM4898, LM4898MMBD
SNAS216E –MAY 2003–REVISED APRIL 2013 www.ti.com
Electrical Characteristics V
DD
= 3V
(1) (2) (3)
The following specifications apply for V
DD
= 3V, 8Ω load and A
V
= 1V/V, unless otherwise specified. Limits apply for T
A
=
25°C.
LM4898
Units
Parameter Test Conditions
(Limits)
Typ
(4)
Limit
(5)
I
DD
Quiescent Power Supply Current V
IN
= 0V, no load 2.5 5 .5 mA (max)
V
IN
= 0V, R
L
= 8 Ω 4 9
I
SD
Shutdown Current V
SDMODE
= V
SHUTDOWN
= GND 0.1 1 µA (max)
P
o
Output Power THD = 1% (max); f = 1kHz LM4898, 0.35 W
RL = 8Ω
THD+N Total Harmonic Distortion+Noise P
o
= 0.25Wrms; f = 1kHz 0.03 %
PSRR Power Supply Rejection Ratio V
ripple
= 200mV sine p-p
f = 217Hz
(6)
83 dB
f = 1kHz
(6)
84
f = 217Hz
(7)
83
f = 1kHz
(7)
83
CMRR Common-Mode Rejection Ratio f = 217Hz 50 dB
V
CM
= 200mV
PP
V
OS
Output Offset V
IN
= 0V 2 mV
V
SDIH
Shutdown Voltage Input High SD Mode = GND 0.8 V
V
SDIL
Shutdown Voltage Input Low SD Mode = GND 0.6 V
V
SDIH
Shutdown Voltage Input High SD Mode = V
DD
0.8 V
V
SDIL
Shutdown Voltage Input Low SD Mode = V
DD
0.6 V
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(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 ensure specific performance limits. Electrical Characteristics VDD = 3V 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 specified for parameters where no limit is given, however, the typical value is a good
indication of device performance.
(3) 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.
(4) Typicals are measured at 25°C and represent the parametric norm.
(5) Datasheet min/max specification limits are specified by design, test, or statistical analysis.
(6) Unterminated input.
(7) 10Ω terminated input.
External Components Description
(See Figure 4)
Components Functional Description
1. C
S
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.
2. C
B
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External
Components, for information concerning proper placement and selection of C
B
.
3. R
i
Inverting input resistance which sets the closed-loop gain in conjunction with R
f
.
4. R
f
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
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