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IC-LV Datasheet(PDF) 2 Page - IC-Haus GmbH |
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IC-LV Datasheet(HTML) 2 Page - IC-Haus GmbH |
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2 / 15 page  iC-LV 5-BIT OPTO ENCODER Rev C1, Page 2/15 DESCRIPTION iC-LV is an optoelectronic encoder IC for absolute linear and angle measuring systems such as glass scales and shaft encoders, for example. Photosen- sors, amplifiers and comparators for 5 tracks at a pitch of 600 µm and a reference photosensor operating the LED power control are monolithically integrated on the chip. The internal comparator outputs switch to high when the amplified photocurrents exceed a given threshold (constant light evaluation). This threshold can be ad- justed using an external resistor at RSET; alternatively, if RSET is not wired an internal resistor is used. The internal or external resistor also establishes a setpoint for the LED current control which irrespec- tive of temperature or the effects of aging keeps the optical receive power constant. A driver stage en- ables either a transmitting LED with a series resistor to be directly connected to the device or operates an external transistor to generate higher currents. Track information can be read out in parallel (either in Gray or binary code) or serially via an SSI protocol. Here, any number of iC-LVs can be cascaded and synchronized with one another; data is then output as a binary word (requiring Gray code discs). A watchdog generates an alarm message via the error output if the LED current control range is exceeded. The open-drain error output can be wired to a bus; the signal is then low active. The serial data output can also be complemented by the error bit. All inputs and outputs are protected against destruc- tion by ESD. Two different test modes can be selected by pin and permit a complete test of functions with the exception of the photosensors. PACKAGING INFORMATION PAD LAYOUT D0 SCLK VDD LVCC SYNM1 SEEN SYNM0 SERIN SOUT GND AGND LED NINV MODE TEST RSET NERR NDIR VCCA D3 D1 D2 D4 DREF RC PAD FUNCTIONS No. Name Function RC1) RC Network for SSI Monoflop VCCA2) +4...+5.5 V Analog Supply Voltage VDD +4...+5.5 V Digital Supply Voltage LVCC +4...+5.5 V LED Driver Supply Voltage NINV Bit-wise Inversion Input (low active) MODE Operating Mode Selection Input TEST Test Mode Enable Input (high active) RSET1) LED Power Control Adjustment NERR Error Output (low active) NDIR Direction Input (low active) LED LED Power Control Output (high-side current source) AGND3) Analog Ground GND Digital Ground SOUT Serial Data Output (SSI) / Data Output D4 SERIN Serial Data Input (SSI) / Data Outp. D3 SCLK Clock Input (SSI) / Data Output D2 SYNM0 Synchronisation Mode Input / Data Output D1 SYNM1 Synchronisation Mode Input / Data Output D0 SEEN Serial Error Bit Enable Inp. (high act.) 1) Wiring is optional. 2) Pad must be connected to VDD. 3) Pad must be connected to GND. |
Similar Part No. - IC-LV_16 |
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Similar Description - IC-LV_16 |
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