IC-OG Datasheet, PDF (8/9 Pages) IC-Haus GmbH – 8-BIT DIFFERENTIAL SCANNING OPTO ENCODER

iC-OG
8-BIT DIFFERENTIAL SCANNING OPTO ENCODER
Rev C1, Page 8/9
A resistor in series with the LED limits the current in pin LED and sets the operating limits of the control.
The optical feedback between the LED and the reference photodiodes should be good enough to establish an
LED current of less than 15mA at room temperature. Only under these conditions does the power driver have
a sufficient current reserve to correct the LED's decline in efficiency even at high temperatures.
Control Monitor and Error Message Output
The control monitor observes the potential at the CSR pin. Voltages which bring the power driver to saturation
or off-state are recognized and indicated at the open-collector output by NER= low.
APPLICATIONS INFORMATION
Using the test aid
The threshold current defined in the electrical characteristic No. 602 must be exceeded at both pins TIP and
TIN simultaneously to activate the iC-OG's built-in test aid. Once it has been activated, the test aid does not
switch back to off-state until the current drops below approx. 1µA.
A clamp circuit as shown in Figure 2 also prevents falling below the test aid turn-on threshold for a short time.
The output polarity of the iC-OG is to be changed over with the switch.
Fig. 2: Wiring the test aid
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As a general rule our developments, IPs, principle circuitry and range of Integrated Circuits are suitable and specifically designed for appropriate use in
technical applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. In principle the
range of use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade
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stipulations of patent law. Our explicit application notes are to be treated only as mere examples of the many possible and extremely advantageous uses our
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