Quick Start Guide UG-378 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Overview of AD5110/AD5112/AD5114 Connections and Functionality PIN CONFIGURATION This quick start guide provides a general overview of AD5110/ AD5112/AD5114 connections and functionality and should be reviewed in conjunction with the AD5110/AD5112/AD5114 data sheet. VDD 1 A 2 W 3 B 4 FUNCTIONAL BLOCK DIAGRAM VLOGIC VDD EEPROM A PIN FUNCTION DESCRIPTIONS W Table 1. Pin No. 1 2 3 4 5 6 7 8 B RDAC REGISTER DATA 10547-001 SCL I2C SERIAL INTERFACE GND Figure 1. Mnemonic VDD A W B GND SCL SDA VLOGIC EPAD 6 SCL 5 GND Description Positive power supply. Terminal A of RDAC. Wiper terminal of RDAC. Terminal B of RDAC. Ground pin. Serial clock line. Serial data line. Logic power supply. Internally floating exposed pad. TYPICAL EXTERNAL CONNECTIONS SUPPLIES 0.1µF 10µF + VDD 2.2kΩ 0.1µF SCL 8 1 A 2 6 2.2kΩ GROUNDS DIGITAL GND SDA 5 ANALOG GND Rev. 0 | Page 1 of 4 w 4 B Figure 3. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. 3 7 10547-003 + VLOGIC VLOGIC VDD 10µF 7 SDA Figure 2. AD5110/AD5112/AD5114 SDA TOP VIEW (Not to Scale) 8 VLOGIC NOTES 1. THE EXPOSED PAD IS INTERNALLY FLOATING. POWER-ON RESET DATA AD5110/ AD5112/ AD5114 10547-002 GENERAL DESCRIPTION UG-378 Quick Start Guide OPERATIONAL CONDITIONS Table 2. Specifications Parameter VDD to GND VLOGIC to GND VA, VW, VB to GND Maximum Continuous IA, IW, IB RAW = 5 kΩ and 10 kΩ RAW = 80 kΩ Maximum Clock (SCL) Specification 2.3 V to 5.5 V 1.8 V to VDD GND to VDD ±6 mA ±1.5 mA 400 kHz Table 3. Device Address Selection 7-Bit I2C Device Address 0101111 0101100 Model AD511X1 BCPZ Y2 AD511X1 BCPZ Y2-1 1 2 Model. Resistance. SHIFT REGISTER AND TIMING DIAGRAM 1 9 1 9 1 9 SCL 0 1 0 1 1 A1 A0 START BY MASTER R/W 0 0 0 0 0 C2 C0 C1 ACK. BY AD5110 D7 D6 D5 D4 D3 D2 D1 ACK. BY AD5110 FRAME 1 SERIAL BUS ADDRESS BYTE FRAME 2 MOST SIGNIFICANT DATA BYTE D0 ACK. BY STOP BY AD5110 MASTER FRAME 3 LEAST SIGNIFICANT DATA BYTE 10547-004 SDA Figure 4. Write Sequence COMMANDS Table 4. Command Operation Truth Table Data1 Command DB10 DB8 C2 C1 C0 0 0 0 0 0 1 0 1 0 DB7 D7 X X 0 3 0 1 4 5 6 1 1 1 0 0 1 Command Number 0 1 2 D5 X X 5 D4 X X 4 D3 X X 3 D2 X X 2 D1 X X 12 1 1 1 X D6 X X 6 MSB 0 1 X 0 1 X 0 1 X 0 1 X 0 1 X 0 1 X DB0 D0 X X 02, 3 LSB 0 1 A0 0 1 0 X X X X X X X X X X X X X X X X X X X X A1 X X A0 1 X is a don’t care. In the AD5114, this bit is a don’t care. 3 In the AD5112, this bit is a don’t care. 2 Rev. 0 | Page 2 of 4 Operation No operation Write contents of RDAC register to EEPROM Write contents of serial register data to RDAC Top scale Bottom scale Software shutdown Shutdown off Shutdown on Software reset: refresh RDAC register with EEPROM Read contents of RDAC register Read contents of EEPROM A1 A0 Data 0 0 Wiper position saved 0 1 Resistor tolerance Quick Start Guide UG-378 HOW TO CALCULATE THE ACTUAL END-TO-END RESISTANCE For example, if RAB = 10 kΩ and the resistor tolerance data readback shows 01010010 (see Table 5), the end-to-end resistance can be calculated as: DB[7]: 0 = negative (1 = positive) DB[6:3]: 1010 = 10 DB[2:0]: 010 = 2 × 2−3 = 0.25 Then: Tolerance = −10.25% and, therefore, RAB = 8.975 kΩ. Table 5. Resistor Tolerance Format DB7 Sign DB6 24 DB5 23 DB4 22 Data Byte DB3 2 . DB2 2−1 DB1 2−2 DB0 2−3 EXAMPLES Table 6. Write the RDAC Register and Place the Wiper at Zero Scale Sequence Data I2C Address 0x5E Write RDAC Command 0x02 Zero Scale 0x00 Table 7. Readback the Wiper Position Saved Sequence Data I2C Address 0x5E Write EEPROM Readback Command 0x06 Location 0x00 Rev. 0 | Page 3 of 4 Repeat start I2C Address 0x5F Readback Data 0xXX UG-378 Quick Start Guide NOTES REVISION HISTORY 3/12—Revision 0: Initial Version ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. ©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG10547-0-3/12(0) Rev. 0 | Page 4 of 4