Opto h11 - opto h11aa1,opto h11a1z=h11a1,opto h11a2,opto h11a4,opto h11a5,opto h11a817b,opto h11a817asd,opto h11a5100,opto h11aa1,opto h11aa1. Buy ON Semiconductor H11F3M in Avnet APAC. View Substitutes & Alternatives along with datasheets, stock, pricing and search for other Transistor & Photovoltaic Output PhotoCouplers products.
3/19/03
H11f3m Pdf
Page 6 of 10
© 2003 Fairchild Semiconductor Corporation
PHOTO FET OPTOCOUPLERS
H11F1 H11F2 H11F3
TYPICAL APPLICATIONS
AS A VARIABLE RESISTOR
AS AN ANALOG SIGNAL SWITCH
ISOLATED VARIABLE ATTENUATORS
Distortion free attenuation of low level A.C. signals is accom-
plished by varying the IRED current, I
F
Note the wide dynamic
range and absence of coupling capacitors; D.C. level shifting or
parasitic feedback to the controlling function.
ISOLATED SAMPLE AND HOLD CIRCUIT
Accuracy and range are improved over conventional FET
switches because the H11F has no charge injection from the
control signal. The H11F also provides switching of either
polarity input signal up to 30V magnitude.
AUTOMATIC GAIN CONTROL
This simple circuit provides over 70db of stable gain control for
an AGC signal range of from 0 to 30mA. This basic circuit can
be used to provide programmable fade and attack for electronic
music.
MULTIPLEXED, OPTICALLY-ISOLATED A/D CONVERSION
The optical isolation, linearity and low offset voltage of the
H11F allows the remote multiplexing of low level analog signals
from such transducers as thermocouplers, Hall effect devices,
strain gauges, etc. to a single A/D converter.
ACTIVE FILTER FINE TUNING/BAND SWITCHING
The linearity of resistance and the low offset voltage of the
H11F allows the remote tuning or band-switching of active
filters without switching glitches or distortion. This schematic
illustrates the concept, with current to the H11F1 IRED’s
controlling the filter’s transfer characteristic.
TEST EQUIPMENT - KELVIN CONTACT POLARITY
In many test equipment designs the auto polarity function uses
reed relay contacts to switch the Kelvin Contact polarity. These
reeds are normally one of the highest maintenance cost items
due to sticking contacts and mechanical problems. The totally
solid-State H11F eliminates these troubles while providing
faster switching.
500K
V
IN
V
OUT
V
IN
V
OUT
500K
50
Ω
I
F
H11F1
I
F
H11F1
LOW FREQUENCY
HIGH FREQUENCY
DYNAMIC RANGE
≈ 70db
FOR 0
≤ I
F
≤ 30mA
@10KHz
DYNAMIC RANGE
≈ 50db
FOR 0
≤ I
F
≤ 30mA
@1MHz
V
IN
V
OUT
I
F
V
IN
V
OUT
I
F
t
H11F1
C
+
-
V
IN
V
OUT
I
F
H11F1
AGC
SIGNAL
500K
+
-
V
1
CALL V1
V
2
V
n
H11F1
MSB
MSB
CALL
V
n
D
ATA
INPUT
H11F1
LSB
LSB
H74A1
H74A1
A/D
CONVERTER
PROCESS
CONTROL
LOGIC
SYSTEM
DATA
ACQUISITION
I
F1
ADJUSTS f
1
, I
F2
ADJUSTS f
2
I
F1
A2
A3
A1
H11F1
I
F2
H11F1
I
F
A
C
H11F1
I
F
H11f3 Datasheet
H11F1
I
F
I
TEST
B
D
H11F1
I
F
H11F1
Ge H11f3
DEVICE
UNDER
TEST
PARAMETER
SENSING
BOARD
I
H11f3 Optocoupler
F
TO
A & B FOR
POLARITY 1
H11f3sr2m
C & D FOR
H11f3m
POLARITY 2