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IC-WG Datasheet(PDF) 2 Page - IC-Haus GmbH |
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IC-WG Datasheet(HTML) 2 Page - IC-Haus GmbH |
2 / 11 page iC-WG 14-BIT DIFFERENTIAL SCANNING OPTO ENCODER Rev B0, Page 2/11 DESCRIPTION The iC-WG is an optoelectronic detector IC for linear and angle measuring systems, e.g. glass scales or rotary encoders. Monolithically integrated are photodiodes, amplifiers and comparators as well as TTL-compatible push-pull output drivers. All 14 tracks are differentially evaluated. An integrated LED current control with driver stage makes it possible to directly connect a transmit LED with series resistor and also guarantees a constant optical received power. The setpoint for the receive current is adjusted via an external resistor. If the LED current control deviates from its working range, this is indicated at the error message output. For the adjustment of a reticle the chip features two adjustment crosses and supplies the analog signals from three monitor photocurrent amplifiers. For exact radial alignment of the iC-WG (with reticle) to the code disk, two monitor photodiodes are arranged such that the track position can be checked (option, not available in the standard SMD package). Two test pins permit a complete electrical functional test of the IC not including the photodiodes. All push-pull and analog outputs are protected against ESD and short-circuits. The error message output NERR is also short-circuit-proof and due to it’s open-collector design bus capable. PAD DESCRIPTION Name Function GND Ground IN0 Track N0 Analog Output (current sink) IP0 Track P0 Analog Output (current sink) IN1 Track N1 Analog Output (current sink) IP1 Track P1 Analog Output (current sink) RGND Reference Ground for RSR circuitry RSR LED Current Control Setup LED LED Driver Output LGND LED Driver Power Ground NERR Error Message Output, low active CSR External capacitor for LED control TIP Positive Test Aid Input TIN Negative Test Aid Input VCC +5 to +20V Supply Voltage A13 Track 13 Push-Pull Output A12 " .. " A0 Track 0 Push-Pull Output |
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