AR18 BOARDCOM | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 16
Technical content
Features
Miniature absolute encoder ASIC surface mount DFN package: 10.9 mm (L) x 9.1 mm (W) x 1.5 mm (H) User-programmable resolution ranging from: – 17, 19, and 21 bit s ingle turn (OD18). – 17 and 21 bit sin gle turn (OD35). User-programmable incremental output (ABI) resolution ranging from 128 to 8192 CPR User-programmable commutation signal (UVW) ranging from 2, 3, 4, 5, 12, 30, 32 pole pair Differential output for ABI and UVW High temperature range of –40°C to 115°C suitable for most of the industrial operation. Dual-mode operating voltage of 3.3V and 5V, enabling handheld and portable device applications. Selectable SSI mode communication protocol. Selectable RS485 mode communication protocol. RoHs compliance.
Applications
Robotic automation and engineering Factory automation and drone Medical and dentistry, devices and equipment High-accuracy portable and handheld devices Miniature motor, servo motor, linear actuator AR18 and AR35 Series Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits Encoder Mounting Figure 5: Encoder Mounting Guide Notes of assembly: The assembly of the encoder needs clean room condition, Class 100k or better. The encoder needs to be enclosed with IP50 enclosure. AR35 AR18
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits Recommended PCB Land Pattern Figure 6: PCB Land Pattern Electrical Specifications Recommended Operating Conditions Parameter Symbol Value Unit NotesMin Typical Max DC Supply Voltage V dd +4.5 +5.0 +5.5 V DC Supply Voltage V dd +3.0 +3.3 +3.6 V Ripple of Supply Voltage — — 100 mVpp 100 kHz Ambient Temperature T amb — + 2 5— ° C Operational Temperature T A –40 +25 +115 °C Storage Temperature T S –40 +25 +115 °C Humidity RH — — 85 % Temp = 40°C INC Operating Frequency — — 128 kHz Velocity (rpm) x CPR/60 Radial Misalignment –200 0 +200 μm Tangential Misalignment –200 0 +200 μm Encoder Shaft Speed SRPM — — 30000 rpm 256CPR (AR18) Encoder Shaft Speed SRPM — — 15000 rpm 512CPR (AR35) SMT Reflow Profile: JEDEC Pb-Free (J-STD-020D) PIN-18 PIN-17
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits Absolute Maximum Ratings DC Characteristics DC characteristics over recommended operating range, typical at 25°C. Encoder Characteristics Incremental encoder characteristics over recommended operating range, at 25°C. Encoder Pin Functions Figure 7: Pinouts from Top View Parameter Symbol Value Storage Temperature T S –40°C to 115°C Operating Temperature T A –40°C to 115°C Supply Voltage V dd 7V Moisture Sensitive Level 3 (Maximum floor life = 168h) Parameter Symbol Conditions Value Unit Notes Min Typ. Max Vdd Supply Current I dd Vdd = 3.3V/5V — 70 — mA Absolute Single-Turn Resolution (AR18) — 17, 19, and 21 — Bit Absolute Single-Turn Resolution (AR35) — 17 and 21 — Bit Incremental Resolution — 2n — CPR n = 7, 8, 9,10, 11, 12, 13 Parameter Symbol Min Typ Maxa a. Maximum values represent the encoder performance across the r ange of recommended mounting tolerance. Unit Cycle Error ΔC — — 45 °e State Error ΔS — — 45 °e Index Pulse Width Po — 90,180, 360 — °e
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits SSI 3-Wire Option Pinout Configuration NOTE: Pin 35 must be grounded to VSSA and pin 17 connect to common GND. Table 1: SSI 3-Wire Pinout Pin Name Function Pad Type Analog/Digital Input/ Output 1 CN/TST3 Analog Voltage Output NCOS 5V/3.3V pads Analog I/O 2 CP/TST2 Analog Voltage Output PCOS 5V/3.3V pads Analog I/O 3 SN/TST1 Analog Voltage Output NSIN 5V/3.3V pads Analog I/O 4 SP/TST0 Analog Voltage Output PSIN 5V/3.3V pads Analog I/O 5 SPI DOUT SPI Data Output 3.3V/5V (VDDPAD) Digital Output 6 SPI DIN SPI Data Input 3.3 V/5V (VDDPAD) Digital Input 7 SPI CLK SPI Clock 3.3V/5V (VDDPAD) Digital Input 8 VDD Digital Supply Voltage 3.3V/5V (VDDPAD) Digital Power
9 VSS Digital GND Digital ground Digital ground Ground
10 + SSI DOUT SSI Data Output ( +) 3.3V/5V (VDDPAD) Digital I/O 11 – SSI DOUT SSI Data Output ( –) 3.3V/5V (VDDPAD) Digital I/O 12 + SSI NSL SSI Input (+) 3. 3V/5V (VDDPAD) Digital I/O 13 – SSI NSL SSI Input (–) 3. 3V/5V (VDDPAD) Digital Input 14 + SSI SCL SSI Clock (+) 3.3 V/5V (VDDPAD) Digital Input 15 – SSI SCL SSI Clock (–) 3.3 V/5V (VDDPAD) Digital Input
17 ESL SEL Protocol Selection Selection (GND) Ground Ground
18 EEPROM SCL EXT EEPROM Clock 3.3V/5V (VDDPAD) Digital I/O 19 EEPROM SDA EXT EEPROM Data 3.3V/5V (VDDPAD) Digital I/O 20 EEPROM WP EXT EEPROM Write Prote ct 3.3V/5V (VDDPAD) Digital Outpu t 21 –A Incremental –A Output 3. 3V/5V (VDDPAD) Digital Output 22 +A/PROBE1 Incremental +A Outp ut 3.3V/5V (VDDPAD) Digital Output 23 –B Incremental –B Output 3. 3V/5V (VDDPAD) Digital Output 24 +B/PROBE2 Incremental +B Out put 3.3V/5V (VDDPAD) Digital Output 25 –I Incremental –Index Output 3.3V/5V (VDDPAD) Digital Output 26 +I/PROBE3 Incremental +Index Ou tput 3.3V/5V (VDDPAD) Digital Outp ut
27 VSSA Analog GND Analog ground Analog ground Ground
28 VDDA Analog Supply Voltage 3.3V/5V (VDDPAD) Analog Power 29 –U Incremental –U Output 3. 3V/5V (VDDPAD) Digital Output 30 +U/PROBE4 Incremental +U Output 3.3V/5V (VDDPAD) Digital Output 31 –V Incremental –V Output 3. 3V/5V (VDDPAD) Digital Output 32 +V Incremental +V Output 3. 3V/5V (VDDPAD) Digital Output 33 –W Incremental –W Output 3.3V/5V (VDDPAD) Digital Output 34 +W Incremental +W Output 3. 3V/5V (VDDPAD) Digital Output
35 Common GND (VSSA) Grou nd to VSSA Analog gro und Analog ground Grou nd
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits ESL Option Pinout Configuration NOTE: Pin 35 must be grounded to VSSA and pin 17 connect to VDD (5V/3.3V). Table 2: ESL Pinout Pin Name Function Pad Type Analog/Digital Input/ Output 1 CN/TST3 Analog Voltage Output NCOS 5V/3.3V pads Analog I/O 2 CP/TST2 Analog Voltage Output PCOS 5V/3.3V pads Analog I/O 3 SN/TST1 Analog Voltage Output NSIN 5V/3.3V pads Analog I/O 4 SP/TST0 Analog Voltage Outpu t PSIN 5V/3.3V pads Analog I/O 8 VDD Digital Supply Voltage 3.3V/5V (VDDPAD) Digital Power 10 + RS485 RS485 Data Output (+ ) 3.3V/5V (VDDPAD) Digital I/O 11 – RS485 RS485 Data Output (– ) 3.3V/5V (VDDPAD) Digital I/O 16 OSC_EXT External Oscill ator 3.3V pad s Digital Input
17 ESL SEL Protocol Selection Selection (VDD) Digital Power
18 EEPROM SCL EXT EEPROM Clock 3.3V/5V (VDDPAD) Digital I/O 19 EEPROM SDA EXT EEPROM Data 3.3V/5V (VDDPAD) Digital I/O 20 EEPROM WP EXT EEPROM Write Prote ct 3.3V/5V (VDDPAD) Digital Outpu t 21 –A Incremental –A Output 3. 3V/5V (VDDPAD) Digital Output 22 +A/PROBE1 Incremental +A Outp ut 3.3V/5V (VDDPAD) Digital Output 23 –B Incremental –B Output 3. 3V/5V (VDDPAD) Digital Output 24 +B/PROBE2 Incremental +B Outp ut 3.3V/5V (VDDPAD) Digital Output 25 –I Incremental –Index Output 3.3V/5V (VDDPAD) Digital Output 26 +I/PROBE3 Incremental +Index Ou tput 3.3V/5V (VDDPAD) Digital Outp ut 28 VDDA Analog Supply Voltage 3.3V/5V (VDDPAD) Analog Power 29 –U Incremental –U Output 3.3V/5V (VDDPAD) Digital Output 30 +U/PROBE4 Incremental +U Output 3.3V/5V (VDDPAD) Digital Output 31 –V Incremental –V Output 3. 3V/5V (VDDPAD) Digital Output 32 +V Incremental +V Output 3.3V/5V (VDDPAD) Digital Output 33 –W Incremental –W Output 3.3V/5V (VDDPAD) Digital Output 34 +W Incremental +W Output 3. 3V/5V (VDDPAD) Digital Output
35 Common GND (VSSA) Ground to VSSA Analog ground Analog ground Grou nd
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits ESL Figure 11: General Transmission Frames Format on Half Duplex Line Start of transmission frames set: Upon detected the first logic of Low state 0 on the transmission line after idling state, and if the following 3 bit conforms to command identifier, the encoder will acknowledge as a valid Request Command Frame (RCF), indicating the start of transmission frame set; else, it will continue to search for next available logic of low state 0. End of transmission frames set: After the Request Command Frame is detected, if there is no Start Bit after the End Bit of the last frame read and no subsequent frame detected, end of transmission frame set is concluded. Idle state: Idle state means a space between each transmission frames set and subsequent transmission frames. At idling state, logic of output in transmission line is kept to high state 1. Encoder Data Read Out Frame Sets Format and Timing Figure 12: Encoder Data Read Out Frames Set Upon the master issue a RCF frame request, after 10.0 μs (typ.), the encoder will respond with encoder data frames set with the following content: 1. CF: Corresponds to the Request Command Frame (RCF) issued fro m master. 2. SF: Status Frame. 3. DF0~DF7: Data Frames. 4. CRC: Cyclic Redundancy Check (CRC) Frame. Encoder position calculation will be completed within 10.0 μs (typ.) after the end bit of Master Request Command Frame (RCF). The Encoder Response data frames set format are dependent on the requested operation by the master, see Table 3.
1 IDLE IDLE
0 RCF CF SF DF0 CRC
(Master Request) Transmission Frames set (Encoder Response) Data Frames 1 10.0±0.2us (typ) IDLE
0 RCF CF SF DF0 DF1 CRC
Master Request Encoder Response
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits Memory Data Read Out Frames Set Format and Timing Figure 13: Memory Data Read Out Frames Set Content of transmission frames: 1. RCF: Request Command Frame from master. 2. CF: Corresponds to the Request Command Frame (RCF) issued fro m master. 3. MAF: Memory Address Frame indi cates the memory location to read. 4. MDF: Memory Data Frame conta ins the data read from memory. 5. CRC: Cyclic Redundancy Check (CRC) Frame. Table 3: Data Frames Content with Respective Command ID Command ID DF0 DF1 DF2 DF3 DF4 DF5 DF6 DF7 Command ID 4 ALMCa a. ALMC: Encoder Alarm Flags. ABS0b b. ABSn: Single-turn counts. LSB of the single-turn counts are located in ABS0, and MSB of the counts data are located in ABS3. Combining ABS0~ABS3 will provide total to 32 bits of single-turn data. For single-turn 25 bits encoder option, the 7 MSB of ABS3 is fixed to 0, hence giving total 25 bits single turn-data. ABS1 ABS2 ABS3 Command ID 6 ABS0 ABS1 ABS2 ABS3 Command ID 8 ENIDc c. ENID: Encoder Single-turn bits identification. Command ID A ALMC Command ID B ALMC ABS0 ABS1 ABS2 ABS3 Command ID C ALMC ABS0 ABS1 ABS2 ABS3 1 10.0±0.2us (typ)
0 RCF MAF CRC CF MAF MDF CRC
Address Frame CRC Frame Command Frame Memory Address Frame Memory Data Frame CRC Frame Master request frames set Frame content will change base on the command issued 0.5us max Master Request Encoder Response Internal latch of Data
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits Memory Data Write Frames Set Format and Timing Figure 14: Memory Data Write Frames Set Content of transmission frames: 1. RCF: Request Command Frame from master. 2. CF: Corresponds to the Request Command Frame (RCF) issued fro m master. 3. MAF: Memory Address Frame indi cates the memory location to write. 4. MDF: Memory Data Frame contains the data write from memory. 5. CRC: Cyclic Redundancy Check (CRC) Frame. 1 10.0±0.2us (typ)
0 RCF MDF MDF CRC CF MAF MDF CRC
Frame content will change base on the command issued 0.5us max Master Request Encoder Response Internal latch of Data
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits Configurations and Signal Output Customer Configurations Table 4: Encoder Configuration Settings Page (Hex) Address Bit (s) Name Settings Output Default (Hex) 0x08 0x00 0-7 Register Unlock Unlock (Write 0xAB) Unlock register 8'h 00 0x0E 0x09 7 EEPROM Disable 0 Disable EEPROM 8'h00
1 Enable EEPROM
5 CW Direction 0 Count UP (CCW)
1 Count UP (CW)
3-4 RS485 Baud Rate Setting 0 SSI 3W 1 2.5MHz ESL 11 10MHz ESL 0-2 RS485 Encoder ID 000 Default 0x0A 5-7 UVW Setting [2:0] 0 2 pole-pairs 8'hC0 1 3 pole-pairs 10 4 pole-pairs 11 5 pole-pairs 100 12 pole-pairs 101 30 pole-pairs 110 32 pole-pairs 111 32 pole-pairs 3-4 I-width Setting 0 90 edeg 1 180 edeg 10 360 edeg 11 90 edeg 0-2 CPR Setting 0 8192 1 4096 10 2048 11 1024 100 512 101 256 110 128 111 128 0x0B 0-1 Abs Resolution AR35 Bit: 00 17 Bit 8'h3F AR35 Bit: 01 21 Bit AR18 Bit: 00 17 Bit AR18 Bit: 01 19 Bit AR18 Bit: 10 21 Bit
Broadcom AR18-AR35-Series-DS100 AR18 and AR35 Series Data Sheet Miniature Programmable Single-Turn Absolute Encoder with Resolution Ranging from 17 bits to 21 Bits
Ordering Information
Encoder Ordering Information Calibration Kit Ordering Part No: A21E-0010 Description: AR18/35 Electronic Calibration Kits Packaging Encoder Packaging Information (Tray): 60 units per tray Codewheel Packaging Information (Tray): 30 units per tray AR Y Y - AB B X S: SSI 3 Wires E : Encoder Serial Link (RS 485) CommunicaƟon Protocol Encoder OD 18 : 18mm 35 : 35mm ResoluƟon 21 : 21Bits R : ReŇecƟve A : ASIC Encoder E d R l Ɵ R c o d e r mm unAvago Absolute
Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, and the A logo are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries and/or the EU. Copyright © 2017 by Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Limited and/or its subsidiaries. For more information, please visit www.broadcom.com. Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. However, Broadcom does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others.