Datasheet

ELECTRICAL CHARACTERISTICS
(continued)
Symbol Prameter Test Condition Min. Typ. Max. Unit
MULTIPLIER SECTION
Multipler Output Current V
VA-OUT
= 4V, V
RMS
= 2V,
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 50µA, C
OSC
= 0V
20 35 52 µA
V
VA-OUT
= 4V, V
RMS
= 2V,
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 200µA, C
OSC
= 0V
100 135 170 µA
V
VA-OUT
= 2V, V
RMS
= 2V,
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 100µA, C
OSC
= 0V
10 20 30 µA
V
VA-OUT
= 2V, V
RMS
= 4V,
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 100µA, C
OSC
= 0V
25.511µA
V
VA-OUT
= 4V, V
RMS
= 4V,
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 100µA, C
OSC
= 0V
10 22 34 µA
V
VA-OUT
= 4V, V
RMS
= 2V,
V
MULTOUT
= 0, V
LFF
= 2.5V
C
OSC
= 0V, I
AC
= 200µA
20 37 54 µA
V
VA-OUT
= 4V, V
RMS
= 4V
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 200µA, C
OSC
= 0V
20 39 54 µA
V
VA-OUT
= 2V, V
RMS
= 4V,
V
MULTOUT
= 0, V
LFF
= 5.1V
I
AC
= 0, C
OSC
= 0V
-2 0 2 µA
K Multiplier Gain 0.37
I
MULT
−
OUT
=
K
⋅
I
AC
(
V
VA
−
OUT
−
1.28
) ⋅ (
0.8
⋅
V
LFF
−
1.28
)
(
V
VRMS
)
2
if V
LFF
= V
REF; I
MULT
−
OUT
=
I
AC
(
V
VA
−
OUT
−
1.28
)
(
V
VRMS
)
2
⋅
K1
where: K1 = 1V
Figure 1:
MULTI-OUT vs. I
AC
(V
RMS
= 1.7V;
V
LFFD
= 5.1V)
Figure 2:
MULTI-OUT vs. I
AC
(V
RMS
= 2.2V;
V
LFFD
= 5.1V)
L4981A - L4981B
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