june 2008 rev 1 1/6 AN2727 application note demonstration board user guidelines for the tsc101 high-side current sense amplifier introduction this application note describes the demo_tsc101, a demonstration board specifically designed for the tsc101 integrated circuit. in this document, you will find: a brief description of the tsc101 a description of the demonstration board a detailed bill of materials of the demons tration board the layout of the demonstration board figure 1. demonstration board www.st.com
about the tsc101 AN2727 2/6 1 about the tsc101 the tsc101 measures a very small voltage drop on a high-side shunt resistor, and, using an internally fixed gain, amplifies the difference into a ground-referenced output voltage. the amplification gain is in ternally fixed and the device is housed in a tiny sot23-5 package. input common-mode and power supply voltages are independent. the common-mode voltage can range from 2.8 v to 30 v in operating conditions, and up to 60 v in absolute maximum ratings. the supply voltage can range from 4 v to 24 v giving you the possibility to connect the power supply pin to either side of the shunt resistor in most cases. most of the tsc101 parameters are guaranteed over the full operating temperature range from -40 c to 125 c. current consumption of less than 300 a over the temperature range and low input bias current (less than 8 a in standard conditions, a few 100 na if v cc isn?t supplied) are particularly interesting to sa ve power in the application. the tsc101 key features are: independent supply and input common-mode voltages wide common-mode operating range: 2.8 v to 30 v wide common-mode surviving range: -0.3 v to 60 v (load-dump) wide supply voltage range: 4 v to 24 v low current consumption: i cc max is 300 a internally fixed gain: 20 v/v (tsc101a), 50 v/v (tsc101b) or 100 v/v (tsc101c) buffered output for more detailed information about the tsc101, refer to the datasheet. figure 2. typical application for the tsc101 5v v s en s e v out lo a d battery or power s ource 2.8v to 30v r s en s e v reg microcontroller adc gnd v cc 4 3 1 2 vp vm o u t gnd 5 vcc i load t s c101 current s en s in g amplifier
AN2727 description of the demonstration board 3/6 2 description of the demonstration board the demo_tsc101 is a demonstration board designed to help you evaluate the performance of the tsc101. figure 3 . demonstration board schematic diagram table 1. demonstration board bill of materials part part type footprint description manufacturer reference ic1 tsc101b sot23-5 high-side current sensing amplifier stmicroelectronics tsc101bilt r1 wsl3637 9.4mm x 9.14mm 5m shunt resistor vishay dale c1 100nf/x7r 0402 supply voltage decoupling capacitor 1 2 4 3 5 vp vm vcc out gnd tsc101 ic1 r2 c1 cap 1 j2 current_in 1 j3 current_out 1 2 3 j1 con3 1 j4 gnd 1 2 3 4 r1
demonstration board layout AN2727 4/6 3 demonstration board layout the printed circuit board of the demonstration board has the following characteristics: board dimensions: 23 mm x 18 mm 2-layer pcb pcb thickness: 0.8 mm fr4 material copper thickness: 18 m figure 4. top view of demonstration board figure 5. bottom view of demonstration board
AN2727 revision history 5/6 4 revision history table 2. document revision history date revision changes 3-jun-2008 1 first release.
AN2727 6/6 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 he rein 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 as sumes 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. i f 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 whatsoev er 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 parti cular 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 milita ry, 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 whatsoev er, 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. ? 2008 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com
|
