Datasheet

LM48100Q
SNAS470D –OCTOBER 2008–REVISED MARCH 2013 www.ti.com
Audio Amplifier Electrical Characteristics V
DD
= 3.6V
(1)(2)
(continued)
The following specifications apply for Programmable Gain = 0dB, R
L
= 8Ω, f = 1kHz, unless otherwise specified. Limits apply
for T
A
= 25°C.
LM48100Q
Typical Room Extended
Units
Symbol Parameter Conditions
(3)
Temp Temp
(Limits)
Limits Limits
(4) (4) (5)
dB (max)
Minimum Gain Setting –54 ±1
dB (min)
A
V
Gain
dB (max)
Maximum Gain Setting 18 ±1
dB (min)
Mute Mute Attenuation –79 –77 dB (max)
11.5 kΩ (min)
A
V
= 18dB 12.5
13.5 kΩ (max)
R
IN
Input Resistance
98 89 kΩ (min)
A
V
= –54dB 110
120 135 kΩ (max)
R
L
= 8Ω, f = 1kHz
P
O
Output Power THD+N = 10% 820 mW
THD+N = 1% 660 480 mW (min)
Total Harmonic Distortion +
THD+N P
O
= 400mW, f = 1kHz, R
L
= 8Ω 0.04 % (max)
Noise
V
RIPPLE
= 200mV
P-P
Sine, Inputs AC GND, C
IN_
= 1μF, input referred, C
BIAS
= 2.2μF
Power Supply Rejection
PSRR
f = 217Hz 78 66 60 dB (min)
Ratio
f = 1kHz 75 dB
SNR Signal-to-Noise-Ratio P
OUT
= TBDmW, f = 1kHz 106 dB
∈
OS
Output Noise A
V
= 0dB, A-weighted Filter 12.5 μV
I
OUT(FAULT)
FAULT Output Current FAULT = 0, V
OUT(FAULT)
= 0.4V 3 mA
Short between either OUTA to V
DD
or
Output to Supply Short GND, or OUTB to V
DD
or GND
R
FAULT
Circuit Detection Threshold Short Circuit 3 kΩ (min)
Open Circuit 7.5 kΩ (max)
Short between both OUTA and OUTB to
Output to Supply Short V
DD
or GND
R
FAULT
Circuit Detection Threshold Short Circuit 6 kΩ (min)
Open Circuit 15 kΩ (max)
Open Circuit Detection 100 Ω (min)
R
OPEN
Open circuit between OUTA and OUTB
Threshold 200 Ω (max)
Output to Output Short 2 Ω (min)
R
SHT
Short circuit between OUTA and OUTB
Circuit Detection Threshold 6 Ω (max)
I
SHTCKT
Short Circuit Current Limit 1.43 A
T
SD
170 °C
t
DIAG
Diagnostic Time 63 ms
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