AMT203-4760

date 04/2010 page 1 of 8 PART NUMBER: AMT203 DESCRIPTION: 12 BIT ABSOLUTE ENCODER This encoder is a 12 bit absolute rotational encoder with SPI serial bus for working as a slave to an external microprocessor. Incremental A,B and Index signals are provided for high speed operation. The Index is one pulse per 22.5 degree (16 index per turn). The encoder contains two channels of a capacitive encoder: a Fine channel and a Coarse channel. The Fine channel has 16 wavelengths of a periodic capacitive pattern, while the Coarse channel has 5 wavelengths. Each channel has its own ASIC that interpolates to a resolution of 256 increments per wavelength. A microprocessor on the encoder PCB is combining the two channels for a position reading that is absolute over a full turn with 12 bit resolution. ELECTRONIC SPECIFICATIONS parameter power supply current consumption output resolution incremental output signals incremental output waveform incremental outputs index output SPI output SPI bus SPI resolution A, B, Z phase square wave output voltage - sourcing to +5 V @ -32 mA output voltage - sinking to ground @ -32 mA one index pulse per 1/16 turn natural binary PIC 16F690 (see datasheet) 12 bit 3.8 0.55 V V conditions/description min 2.7 nom 5 8 1024 max 5.5 10 units V mA ppr MECHANICAL SPECIFICATIONS parameter output range SPI speed mounting hole options A) 2 each M1.6 holes on 16 mm (0.63”) bolt circle B) 2 each #4 holes on 19.05 mm (0.75”) bolt circle C) 2 each M1.6 or M2 holes on 20 mm (0.787”) bolt circle D) 3 each M1.6 or M2 holes on 20.9 mm (0.823”) bolt circle E) 3 each M1.6 or M2 holes on 22 mm (0.866”) bolt circle F) 4 each M1.6 or M2 holes on 25.4 mm (1”) bolt circle G) 2 each #4 holes on 15.75 mm (0.62”) x 20.96 (0.825”) hole layout* H) 2 each #4 holes on 32.43 mm (1.277”) bolt circle* I) 2 each #4 holes on 46.03 mm (1.812”) bolt circle* conditions/description min nom max 360 8000 units deg RPM ENVIRONMENTAL SPECIFICATIONS parameter operating temperature storage temperature humidity vibration 1.5mm, 3 directions, 2 hours 10 conditions/description min -25 -40 85 55 nom max 85 100 units °C °C %RH Hz 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2380 www.cui.com date 04/2010 page 2 of 8 PART NUMBER: AMT203 DESCRIPTION: 12 BIT ABSOLUTE ENCODER AMT203-V KIT In order to provide maximum flexibility for our customers, the AMT203 series is provided in kit form standard. This allows the user to implement the encoder into a range of applications using one sku#, reducing engineering and inventory costs. SLEEVES 8mm Blue 1/4 inch (6.35mm) Snow 6mm Red1 5mm Green1 3/16 inch (4.76mm) Yellow1 4mm Gray60 1/8 inch (3.175mm) Purple1 3mm Orange 2mm Light Sky Blue TOOL A BASE TOP COVER TOOL B SHAFT ADAPTER CUSTOM CONFIG KEY For customers that prefer a specific AMT203 configuration, please reference the custom configuration key below. AMT203 - XXXX Sleeve Bore Diameter: 2000 = 2 mm 2300 = 2.3 mm 3000 = 3 mm 3175 = 3.175 mm (1/8”) 4000 = 4 mm 4760 = 4.76 mm (3/16”) 5000 = 5 mm 6000 = 6 mm 6350 = 6.35 mm (1/4”) 8000 = 8 mm 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2380 www.cui.com date 04/2010 page 3 of 8 PART NUMBER: AMT203 DESCRIPTION: 12 BIT ABSOLUTE ENCODER Connection to customer electronics 10 lead ribbon cable: Power (2); SPI (4); Quadrature (2); Index (1); Zero set (1) Output lines can drive 20 mA. # 1 2 3 4 5 6 7 8 9 10 color black white grey purple blue green yellow orange red brown function T bit IDX A or Count B or Udn MOSI 5V SCK Ground MISO CSN IDX B or UDN 5V Ground CSN 1 T bit A or Count MOSI SCK MISO Tyco connector 1658621-1 Encoder Side BROWN 1' 3" (304.8mm) Round Dual Shielding Jacket Demo Board Side BROWN 28 AWG 10 conductor 1.27 mm pitch BLACK BLACK 3659-10-1FT-DMBD Demo Board Cable (Cable available without Demo Board Connector) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2380 www.cui.com date 04/2010 page 4 of 8 PART NUMBER: AMT203 DESCRIPTION: 12 BIT ABSOLUTE ENCODER 10.30 0.406 R15.50 0.610 15.34 [0.604] 34.14 1.344 17.30 28.60 1.126 MOUNTING BASE 12.4000 .488 R1.050 0.041 16.003 0.630 1.700 0.067 (2 PLCS) 19.050 0.750 .28 0.011 A (3 PLCS) 2.000 0.079 (4 PLCS) TOLERANCE: ±0.05mm UNLESS OTHERWISE SPECIFIED DETAIL A SCALE 4 : 1 2.950 0.116 (2 PLCS) 21.4500 .844 25.399 1.000 RoHS 18.60mm 5.30mm AMT 203 XXYY CUI INC. US Patent No. 6892690 R1.20mm SCALE 5:1 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2380 www.cui.com date 04/2010 page 5 of 8 PART NUMBER: AMT203 DESCRIPTION: 12 BIT ABSOLUTE ENCODER APPLICATION NOTES Encoder operational mode • Initiation mode: At power up the encoder starts by doing: – Coarse channel measurement – Fine channel measurement – Combine fine with coarse for ABS position (natural binary) The above takes about 1 ms. After this, the encoder switches to continuous operation. • Tracking mode: Only the Fine channel is active and the MCU internal position register is updated with data from Fine: – MCU 12 bit position register is updated from Fine every 125 μs. – The MCU position register can be lagging up to 120 μs from the real position. This error is proportional to speed: e