3/19/03
H11L1M, H11L2M, H11L3M — 6-Pin DIP Optocoupler ©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com H11L1M, H11L2M, H11L3M Rev. Blog about Luftwaffe and influence this formation on the development of aviation. History of aviation during World War Second. 5PCS H11F3 OPTOCOUPLER FET BILAT 6-DIP 11F3 H11F. $12.69 + $6.00 shipping. 5 PCS H11F3 DIP-6 PHOTO FET OPTOCOUPLERS. $5.49 + $3.00 shipping. Picture Information. Image not available. Mouse over to Zoom-Click to enlarge. Move over photo to zoom. Have one to sell? The video actually shows the H11F3 being used two different ways; one as an envelope control circuit and the other as a means of bringing a modulation signal in for a vibrato effect on a VCO. Here is the slideshow.
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© 2003 Fairchild Semiconductor Corporation
H11F1 H11F2 H11F3. Absolute Maximum Ratings (T A = 25°C unless otherwise specified) Parameter. Storage Temperature.
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
H11f3 233
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
H11F1
I
F
I
TEST
B
D
H11F1
I
F
H11F1
DEVICE
H11f3
UNDER
TEST
PARAMETER
SENSING
BOARD
H11f3m
I
H11f3m
F
TO
A & B FOR
POLARITY 1
C & D FOR
H11f3sr2m
POLARITY 2