H11F1 Fairchild Optoelectronics Group, H11F1 Datasheet - Page 6

• Manufacturer Part Number: H11F1
• Description: OPTOCOUPLER FET BILAT 6-DIP
• Manufacturer: Fairchild Optoelectronics Group

Specifications of H11F1

• Number Of Channels: 1
• Input Type: DC
• Voltage - Isolation: 5300Vrms
• Voltage - Output: 30V
• Current - Dc Forward (if): 60mA
• Output Type: Photo FET
• Mounting Type: Through Hole
• Package / Case: 6-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Vce Saturation (max): -
• Current Transfer Ratio (max): -
• Current Transfer Ratio (min): -
• Other names: H11F1GE; H11F1QT; H11F1QT

© 2003 Fairchild Semiconductor Corporation
TYPICAL APPLICATIONS
Distortion free attenuation of low level A.C. signals is accom-
plished by varying the IRED current, I
range and absence of coupling capacitors; D.C. level shifting or
parasitic feedback to the controlling function.
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.
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.
ACTIVE FILTER FINE TUNING/BAND SWITCHING
@10KHz
I
F1
V
ADJUSTS f
ISOLATED VARIABLE ATTENUATORS
IN
LOW FREQUENCY
DYNAMIC RANGE ≈ 70db
FOR 0 ≤ I
I
F
AS A VARIABLE RESISTOR
500K
500K
AUTOMATIC GAIN CONTROL
H11F1
V
IN
I
1
F1
I
, I
F
A1
F
F2
H11F1
≤ 30mA
SIGNAL
ADJUSTS f
AGC
V
OUT
H11F1
2
I
F2
A2
+
-
500K
@1MHz
V
IN
I
F
F
HIGH FREQUENCY
H11F1
Note the wide dynamic
DYNAMIC RANGE ≈ 50db
FOR 0 ≤ I
H11F1
V
F
OUT
A3
≤ 30mA
50Ω
V
OUT
Page 6 of 10
PHOTO FET OPTOCOUPLERS
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.
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.
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.
MULTIPLEXED, OPTICALLY-ISOLATED A/D CONVERSION
TEST EQUIPMENT - KELVIN CONTACT POLARITY
V
V
V
1
2
n
ISOLATED SAMPLE AND HOLD CIRCUIT
AS AN ANALOG SIGNAL SWITCH
V
I
IN
TEST
I
F
H11F1
H11F1
DEVICE
UNDER
TEST
H11F1
I
F
I
F
CONVERTER
H11F1
H11F1
A/D
C
A
B
H11F1 H11F2 H11F3
+
-
MSB
LSB
I
I
F
F
H74A1
H11F1
H11F1
V
PARAMETER
H74A1
C
D
OUT
SENSING
BOARD
CALL V1
V
MSB
LSB
V
OUT
I
IN
F
PROCESS
CONTROL
ACQUISITION
SYSTEM
POLARITY 1
POLARITY 2
C & D FOR
LOGIC
A & B FOR
DATA
I
t
F
TO
CALL
V
n
3/19/03