STEVAL-IFP004V1 Digital input termination PCLT2 Data Brief Features ■ Dual input channel ■ Robust with EMC ■ Wide operating range ■ Exposed pad TSSOP14 ■ Flexible current limiter ■ Output driver Description The purpose of this demo board is to evaluate the features of the PCLT-2A sensor input termination. The PCLT-2A is a dual termination device for the front-end of a 24 V DC digital input module. Composed of an input-voltage protection, a serial current-limiter circuit and an output driver, each channel circuit terminates the connection between a high-side proximity sensor and the I/O module. Because of its IEC type programmability and the isolated/non-isolated output options, the PCLT offers a flexible and easy-to-design solution for highly integrated I/O modules. October 2007 STEVAL-IFP004V1 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Schematic Figure 1. In1 In2 Vcc Com In1 In2 Vcc Com Rc_A 2.2k Cc_A 33nF UA LED1 9 LED_A1 ISO1B ILD213 0 0R VDD_A 1 2 3 4 Opto1 Opto2 Vdd Gnd Out1 Out2 Vdd Com OUTPUT_B 1 2 3 4 OUTPUT_A 100nF Cout OPTO VERSION VDD_A ISO1A ILD213 Dnw2 30k VDD_B CMOS VERSION Dnw1 30k 6 VDD_A 5 OUT1 14 LED_A2 LED_B1 VDD_B LED_B2 3 VDD 10 OUT2 12 LED2 8 LED1 9 OUT1 14 VDD 10 OUT2 12 LED2 8 4 1 IN1 13 13 8 Rin_A1 750R COMp COMs 11 COMs 11 7 2 4 3 IN2 5 VC PCLT-2A 7 REF Rref_A 10k UB COMp 1 IN1 2 4 3 IN2 5 VC PCLT-2A 7 REF Rref_B 10k 1 Cin_A1 22nF Cin_A2 22nF Rin_A2 750R D1 SM4005 Rin_B1 750R Cin_B1 22nF Cin_B2 22nF Rin_B2 750R D2 2 INPUT_A 1 2 3 4 INPUT_B 1 2 3 4 Rc_B 2.2k Cc_B 33nF SM4005 2/4 Block diagram 1 STEVAL-IFP004V1 Block diagram STEVAL-IFP004V1 2 Revision history Revision history Table 1. Document revision history Date Revision 22-Oct-2007 1 Changes Initial release 3/4 STEVAL-IFP004V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 4/4