H11F3SR2M Fairchild Semiconductor, H11F3SR2M Datasheet - Page 6

• Manufacturer Part Number: H11F3SR2M
• Description: Transistor Output Optocouplers FET Bilateral analog
• Manufacturer: Fairchild Semiconductor

Specifications of H11F3SR2M

• Maximum Input Diode Current: 60 mA
• Maximum Reverse Diode Voltage: 5 V
• Output Device: Phototransistor
• Output Type: DC
• Configuration: 1 Channel
• Input Type: DC
• Isolation Voltage: 5300 Vrms
• Maximum Forward Diode Voltage: 1.75 V
• Maximum Power Dissipation: 300 mW
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Package / Case: PDIP-6 Gull Wing
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

©2007 Fairchild Semiconductor Corporation
H11F1M, H11F2M, H11F3M Rev. 1.0.4
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
H11FXM allows the remote tuning or band-switching of active
filters without switching glitches or distortion. This schematic
illustrates the concept, with current to the H11F1M IRED’s
controlling the filter’s transfer characteristic.
As a Variable Resistor
ACTIVE FILTER FINE TUNING/BAND SWITCHING
@10KHz
I
F1
V
ADJUSTS f
ISOLATED VARIABLE ATTENUATORS
IN
LOW FREQUENCY
DYNAMIC RANGE
FOR 0
I
F
H11F1M
500K
500K
AUTOMATIC GAIN CONTROL
V
IN
I
1
F1
I
, I
F
I
A1
F
F2
H11F1M
SIGNAL
ADJUSTS f
30mA
AGC
V
OUT
70db
H11F1M
2
I
F2
A2
+
-
500K
@1MHz
V
IN
I
F
F
HIGH FREQUENCY
H11F1M
Note the wide dynamic
H11F1M
DYNAMIC RANGE
FOR 0
V
I
F
OUT
A3
50
30mA
V
OUT
50db
Accuracy and range are improved over conventional FET
switches because the H11FXM has no charge injection from
the control signal. The H11FXM also provides switching of
either polarity input signal up to 30V magnitude.
The optical isolation, linearity and low offset voltage of the
H11FXM 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 H11FXM eliminates these troubles while providing
faster switching.
MULTIPLEXED, OPTICALLY-ISOLATED A/D CONVERSION
As an Analog Signal Switch
6
TEST EQUIPMENT - KELVIN CONTACT POLARITY
V
V
V
1
2
n
ISOLATED SAMPLE AND HOLD CIRCUIT
V
I
IN
TEST
H11F1M
I
F
H11F1M
DEVICE
UNDER
TEST
H11F1M
I
F
I
F
CONVERTER
H11F1M
H11F1M
A/D
C
A
B
+
-
MSB
LSB
I
I
F
F
H74A1
H11F1M
H11F1M
V
PARAMETER
H74A1
C
D
OUT
SENSING
BOARD
CALL V1
V
MSB
LSB
.
OUT
V
I
IN
F
PROCESS
CONTROL
ACQUISITION
POLARITY 1
POLARITY 2
SYSTEM
C & D FOR
LOGIC
A & B FOR
DATA
I
t
F
TO
CALL
V
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n