IC-OF Datasheet, PDF (5/6 Pages) IC-Haus GmbH – 3-BIT OPTO ENCODER

iC-OF
3-BIT OPTO ENCODER
Rev C1, Page 5/6
ELECTRICAL CHARACTERISTICS
Operating Conditions: VCC= 5V ±10%; Tj= -40..125 °C, unless otherwise noted.
Item Symbol Parameter
Conditions
Analog Outputs NI0..2
501 CR()
Current Ratio
I(NIi) / (I(DPi)-I(DNi))
502 I0()
Leakage Current
503 fo()
Cut-off Frequency
504 fo()
Cut-off Frequency
505 fo()
Cut-off Frequency
506 Vc(S)hi Clamp Voltage hi
507 Vc(S)lo Clamp Voltage lo
V(NIi)= 0.3V..VCC-1.2V,
I(DPi)= 3..90nA, I(DNi)= 90..3nA
V(NI)= 0.3V..VCC-1.2V,
I(DPi,DNi)= 0
V(NIi)= constant,
sinussoidal waveform,
I(DPi)= 3..30nA, I(DNi)= 30..3nA
V(NIi)= constant,
sinussoidal waveform,
I(DPi)= 6..60nA, I(DNi)= 60..6nA
R(VCC/NIi)= 50kΩ,
R(NIi/GND)= 50kΩ, CL()= 30pF
Vc()hi= V()-VCC; I()= 3mA
I()= -3mA
Tj Fig.
EC
27
Min.
550
-1.5
100
200
50
0.4
-1.5
Typ.
720
80
Unit
Max.
850
1.5
µA
kHz
kHz
kHz
1.5
V
-0.4
V
APPLICATIONS INFORMATION
Wiring of the analog outputs NI0..2
The analog outputs each consist of two current sources in a push-pull configuration. One of these works towards
GND as a sink, the other works as a source coming from VCC. The voltage swing at the output pins NI0..2 is
determined by the external wiring - the saturation voltage of the current sources must be taken into account.
The simplest configuration is to connect the outputs to a voltage divider consisting of two resistors, wired from
VCC against GND (with 50kΩ respectively, for example). Any resulting load capacities can reduce the cutoff
frequency of the analog signals.
In view of the suppression of the supply voltage, however it may be preferable to use an op-amp as a current-
voltage converter (transconductance amplifier) if the reference potential is suitably stable.
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