Datasheet

LM4675, LM4675SDBD, LM4675TLBD
www.ti.com SNAS353C –AUGUST 2006–REVISED MAY 2013
Electrical Characteristics
(1)(2)
(continued)
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.
LM4675
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)(5)
V
Ripple
= 200mV
PP
Sine,
f
Ripple
= 217Hz, V
DD
= 3.6, 5V 82 dB
Inputs to AC GND, C
I
= 2μF
Power Supply Rejection Ratio
PSRR
(Input Referred)
V
Ripple
= 200mV
PP
Sine,
f
Ripple
= 1kHz, V
DD
= 3.6, 5V 80 dB
Inputs to AC GND, C
I
= 2μF
SNR Signal to Noise Ratio V
DD
= 5V, P
O
= 1W
RMS
97 dB
V
DD
= 3.6V, f = 20Hz – 20kHz
Inputs to AC GND, C
I
= 2μF 28 μV
RMS
Output Noise
No Weighting
ε
OUT
(Input Referred)
V
DD
= 3.6V, Inputs to AC GND
22 μV
RMS
C
I
= 2μF, A Weighted
Common Mode Rejection V
DD
= 3.6V, V
Ripple
= 1V
PP
Sine
CMRR Ratio f
Ripple
= 217Hz 80 dB
(Input Referred)
T
WU
Wake-up Time V
DD
= 3.6V 17 μs
T
SD
Shutdown Time 140 μs
V
DD
= 3.6V, P
OUT
= 400mW
89 %
R
L
= 8Ω
η Efficiency
V
DD
= 5V, P
OUT
= 1W
89 %
R
L
= 8Ω
External Components Description
(Figure 2)
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
I
Input AC coupling capacitor which blocks the DC voltage at the amplifier's input terminals.
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