Datasheet

LM4674
SNAS344E –DECEMBER 2005–REVISED APRIL 2013 www.ti.com
ELECTRICAL CHARACTERISTICS V
DD
= 3.6V
(1)(2)
(continued)
The following specifications apply for A
V
= 6dB, R
L
= 15µH + 8Ω + 15µH, f = 1kHz unless otherwise specified. Limits apply for
T
A
= 25°C.
LM4674
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)(5)
G0, G1 = GND
6 6 ± 0.5 dB
R
L
= ∞
G0 = V
DD
, G1 = GND
12 12 ± 0.5 dB
R
L
= ∞
A
V
Gain
G0 = GND, G1 = V
DD
18 18 ± 0.5 dB
R
L
= ∞
G0, G1 = V
DD
24 24 ± 0.5 dB
R
L
= ∞
A
V
= 6dB 28 kΩ
A
V
= 12dB 18.75 kΩ
R
IN
Input Resistance
A
V
= 18dB 11.25 kΩ
A
V
= 24dB 6.25 kΩ
R
L
= 15μH + 4Ω + 15μH, THD ≤ 10%
f = 1kHz, 22kHz BW
V
DD
= 5V 2.5 W
V
DD
= 3.6V 1.2 W
V
DD
= 2.5V 0.530 W
R
L
= 15μH + 8Ω + 15μH, THD ≤ 10%
f = 1kHz, 22kHz BW
V
DD
= 5V 1.5 W
V
DD
= 3.6V 0.78 0.6 W
V
DD
= 2.5V 0.350 W
P
O
Output Power
R
L
= 15μH + 4Ω + 15μH, THD ≤ 1%
f = 1kHz, 22kHz BW
V
DD
= 5V 1.9 W
V
DD
= 3.6V 1 W
V
DD
= 2.5V 0.430 W
R
L
= 15μH + 8Ω + 15μH, THD = 1%
f = 1kHz, 22kHz BW
V
DD
= 5V 1.25 W
V
DD
= 3.6V 0.63 W
V
DD
= 2.5V 0.285 W
P
O
= 500mW, f = 1kHz, RL = 8Ω 0.07 %
THD+N Total Harmonic Distortion
P
O
= 300mW, f = 1kHz, RL = 8Ω 0.05 %
V
RIPPLE
= 200mV
P-P
Sine,
f
RIPPLE
= 217Hz, Inputs AC GND, 75 dB
C
i
= 1μF, input referred
PSRR Power Supply Rejection Ratio
V
RIPPLE
= 1V
P-P
Sine,
f
RIPPLE
= 1kHz, Inputs AC GND, 75 dB
C
i
= 1μF, input referred
V
RIPPLE
= 1V
P-P
CMRR Common Mode Rejection Ratio 67 dB
f
RIPPLE
= 217Hz
P
O
= 1W, f = 1kHz,
η Efficiency 85 %
R
L
= 8Ω, V
DD
= 5V
Xtalk Crosstalk P
O
= 500mW, f = 1kHz 84 dB
SNR Signal to Noise Ratio V
DD
= 5V, P
O
= 1W 96 dB
ε
OS
Output Noise Input referred, A-Weighted Filter 20 μV
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