TEXAS INSTRUMENTS XTR115 XTR116 4-20mA CURRENT LOOP TRANSMITTERShandbook
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1. Connections XTR115 XTR116 SBOS124A Possible choices for Q see text TYPE PACKAGE 2N4922 TO 225 TIP29C TO 220 TIP31B TO 220 TEXAS INSTRUMENTS 5 www ti com MINIMUM SCALE CURRENT The quiescent current of the XTR115 6 typically 200A is the lower limit of its output current Zero input current Ij 0 will produce an Io equal to the quiescent current Output current will not begin to increase until I gt Ig 100 Current drawn from Vggpg or Vggg will add to this minimum output current This means that more than 3 7mA is avail able to power external circuitry while still allowing the output current to go below 4mA OFFSETTING THE INPUT A low scale of 4mA is produced by creating a 404A input current This can be created with the proper value resistor from Vggp Figure 2 or by generating offset in the input drive circuitry XTR115 Voltage Reference FIGURE 2 Creating Low Scale Offset TEXAS 6 INSTRUMENTS www ti com MAXIMUM OUTPUT CURRENT The XTR115 6 provides accurate linear output up to 25mA Internal circuitry limits the output current to approximately 32mA to protect the transmitter and loop power measure ment circuitry It is possible to extend the output current range of the XTR115 6 by connecting an external resistor from pin 3 to pin 5 to change the current limit value Since all output current must flow through internal resistors it is possible to damage with ex2. Signal Bandwidth Slew Rate Ciooe 0 Ry 0 Vgge 2 XTR115 XTR116 Voltage Accuracy vs Temperature vs Supply Voltage V vs Load Noise 0 1Hz to 10Hz Short Circuit Current lage 0 T4 40 C to 85 C V 7 5V to 36V lage OMA to 2 5mA Vngg 2 Voltage Voltage Accuracy vs Temperature vs Supply Voltage V vs Output Current Short Circuit Current Ingo 0 T4 40 C to 85 C V 7 5V to 36V 0 05 0 1 1 Typical Curves 12 POWER SUPPLY Specified Voltage Range Quiescent Current Over Temperature 40 C to 85 C 24 TEMPERATURE RANGE Specification Operating Storage Thermal Resistance k Specifications the same as XTR115U and XTR116U NOTES 1 Does not include initial error or TCR of Ry 2 Voltage measured with respect to Iger pin i YO Texas XTR115 XTR116 www ti com SBOS124A PIN CONFIGURATION Top View VREG V B Base E Emitter PACKAGE ORDERING INFORMATION For the most current package and ordering information see the Package Option Addendum located at the end of this data sheet ABSOLUTE MAXIMUM RATINGS Power Supply V referenced to lo pin Input Voltage referenced to lger pin Output Current Limit Vrece Short Circuit Vner Short Circuit OV to V Continuous Continuous Continuous b5 C to 125 C 55 C to 125 C Operating Temperature Storage Temperature Range Lead Temperatu
3. 8 go o 0 os o 4 Ws 0 3 75 50 25 0 25 50 75 100 12 5 75 50 25 0 25 50 75 100 125 Temperature C Temperature C Veg VOLTAGE vs Veg CURRENT Vreg Voltage V LLL IL IL r Sinking f Sourcing i3 Current Current 125 C 1 0 1 2 3 4 lagg Current mA X TEXAS INSTRUMENTS XTR115 XTR116 www ti com SBOS124A APPLICATIONS INFORMATION The XTR115 and XTR116 are identical devices except for the reference voltage output pin 1 This voltage is available for external circuitry and is not used internally Further discussions that apply to both devices will refer to the XTR115 6 Figure 1 shows basic circuit connections with representative simplified input circuitry The XTR115 6 is a two wire current transmitter Its input signal pin 2 controls the output current A portion of this current flows into the V power supply pin 7 The remaining current flows in Q1 External input circuitry connected to the XTR115 6 can be powered from Vggg or Vgge Current drawn from these terminals must be returned to Iker pin 3 This Ippy pin is a local ground for input circuitry driving the XTR115 6 The XTR115 6 is a current input device with a gain of 100 A current flowing into pin 2 produces Io 100 Ij The input voltage at the Ij pin is zero referred to the Iggy pin A voltage input is created with an external input resistor as shown Commo
4. Burr Brown Products from Texas Instruments XTR115 XTR116 C gt eom 775 SBOS124A JANUARY 2000 REVISED NOVEMBER 2003 4 20mA CURRENT LOOP TRANSMITTERS FEATURES LOW QUIESCENT CURRENT 2004A 5V REGULATOR FOR EXTERNAL CIRCUITS Vker FOR SENSOR EXCITATION XTR115 2 5V XTR116 4 096V LOW SPAN ERROR 0 05 LOW NONLINEARITY ERROR 0 003 WIDE LOOP SUPPLY RANGE 7 5V to 36V SO 8 PACKAGE DESCRIPTION APPLICATIONS 2 WIRE 4 20mA CURRENT LOOP TRANSMITTER SMART TRANSMITTER INDUSTRIAL PROCESS CONTROL TEST SYSTEMS COMPATIBLE WITH HART MODEM CURRENT AMPLIFIER VOLTAGE TO CURRENT AMPLIFIER used for offsetting or to excite transducers A current return pin Ippy senses any current used in external The XTR115 and XTR116 are precision current out put converters designed to transmit analog 4 to 20mA signals over an industry standard current loop They provide accurate current scaling and output current limit functions circuitry to assure an accurate control of the output current The XTRI115 is a fundamental building block of smart sensors using 4 to 20mA current transmission The XTR115 and XTRI116 are specified for opera tion over the extended industrial temperature range 40 C to 85 C The on chip voltage regulator 5V can be used to power external circuitry A precision on chip Vpgr 2 5V for XTR115 and 4 096V for XTR116 can be XT
5. D 8 2500 Green ROHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116UA 2K5E4 ACTIVE SOIC D 8 2500 Green RoHS amp CU NIPDAU Level 3 260C 168 HR no Sb Br XTR116UAE4 ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116UG4 ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br The marketing status values are defined as follows ACTIVE Product device recommended for new designs LIFEBUY TI has announced that the device will be discontinued and a lifetime buy period is in effect NRND Not recommended for new designs Device is in production to support existing customers but TI does not recommend using this part in a new design PREVIEW Device has been announced but is not in production Samples may or may not be available OBSOLETE TI has discontinued the production of the device 2 Eco Plan The planned eco friendly classification Pb Free RoHS Pb Free RoHS Exempt or Green RoHS amp no Sb Br please check http Avww ti com productcontent for the latest availability information and additional product content details TBD The Pb Free Green conversion plan has not been defined Pb Free RoHS TI s terms Lead Free or Pb Free mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances including the requirement that lead not exceed 0 196 by weight in homogeneous materials Where designed to be soldered at hig
6. R115 XTR116 Vi 45V 5v o Regulator XTR115 2 5V XTR116 4 096V Voltage Reference XX R 2 475kQ 2 100 Iy Please be aware that an important notice concerning availability standard warranty and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet A All trademarks are the property of their respective owners PRODUCTION DATA information is current as of publication date a Products conform to specifications per the terms of Texas Instruments l Standard warranty Production processing does not necessarily include TEXAS testing of all parameters INSTRUMENTS www ti com Copyright 2000 2003 Texas Instruments Incorporated SPECIFICATIONS At T4 25 C V 24V Ry 20k and TIP29C external transistor unless otherwise noted PARAMETER OUTPUT Output Current Equation Output Current Linear Range Over Scale Limit Under Scale Limit CONDITIONS lago 0 Inge 0 XTR115U XTR116U XTR115UA XTR116UA MIN TYP MAX MIN TYP MAX SPAN Span Current Gain Error 1 vs Temperature Nonlinearity ln 250uA to 25mA T4 40 C to 85 C lin 250pA to 25mA INPUT Offset Voltage Op Amp vs Temperature vs Supply Voltage V Bias Current vs Temperature Noise 0 1Hz to 10Hz In 400A T4 40 C to 85 C V 7 5V to 36V DYNAMIC RESPONSE Small
7. ation is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Tl components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual p
8. cessive current Output currents greater than 45mA may cause permanent damage XTR115 XTR116 XTR115 XTR116 Digital Control Optical Isolation XTR115 XTR116 Filter Digital Control Optical Isolation FIGURE 3 Digital Control Methods XTR115 XTR116 SBOS124A REVERSE VOLTAGE PROTECTION The XTR115 6 low compliance voltage rating 7 5V per mits the use of various voltage protection methods without compromising operating range Figure 4 shows a diode bridge circuit which allows normal operation even when the voltage connection lines are reversed The bridge causes a two diode drop approximately 1 4V loss in loop supply voltage This results in a compliance voltage of approxi mately 9V satisfactory for most applications A diode can be inserted in series with the loop supply voltage and the V pin to protect against reverse output connection lines with only a 0 7V loss in loop supply voltage OVER VOLTAGE SURGE PROTECTION Remote connections to current transmitters can sometimes be subjected to voltage surges It is prudent to limit the maximum surge voltage applied to the XTR115 6 to as low as practical Various zener diode and surge clamping diodes are specially designed for this purpose Select a clamp diode with as low a voltage rating as possible for best protection For example a 36V protection diode will assure proper transmitter operation at normal loop voltages yet will provide a
9. d by TI Further Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety critical applications TI products are neither designed nor intended for use in military aerospace applications or environments unless the TI products are specifically designated by TI as military grade or enhanced plastic Only products designated by TI as military grade meet military specifications Buyers acknowledge and agree that any such use of TI products which TI has not designated as military grade is solely at the Buyer s risk and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO TS 16949 requirements Buyers acknowledge and agree that if they use any non designated products in automotive applications TI will not be responsible for any failure to meet such requirements Following are URLs where you can obtain information on other Texas Instruments products and application solutions Products Applications Amplifiers amplifier ti com Audio www ti com audio Data Converters dataconverter ti com Automotive www ti com automotive DSP dsp ti com Broadband www ti com broadband Clocks and Timers www ti com clocks Digital Control www ti com digitalcontrol Inte
10. h temperatures TI Pb Free products are suitable for use in specified lead free processes Pb Free RoHS Exempt This component has a RoHS exemption for either 1 lead based flip chip solder bumps used between the die and package or 2 lead based die adhesive used between the die and leadframe The component is otherwise considered Pb Free RoHS compatible as defined above Green RoHS amp no Sb Br TI defines Green to mean Pb Free RoHS compatible and free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed 0 196 by weight in homogeneous material Addendum Page 1 K Texas PACKAGE OPTION ADDENDUM INSTRUMENTS www ti com 22 Oct 2007 3 MSL Peak Temp The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications and peak solder temperature Important Information and Disclaimer The information provided on this page represents TI s knowledge and belief as of the date that it is provided TI bases its knowledge and belief on information provided by third parties and makes no representation or warranty as to the accuracy of such information Efforts are underway to better integrate information from third parties TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals TI and TI suppliers consider certain information to be proprie
11. ion X XTR115 XTR116 eel eR 7 SBOS124A www ti com XTR115 XTR116 SBOS124A K Texas PACKAGE OPTION ADDENDUM INSTRUMENTS www ti com 22 Oct 2007 PACKAGING INFORMATION Orderable Device Status Package Package Pins Package Eco Plan Lead Ball Finish MSL Peak Temp Type Drawing Qty XTR115U ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR115U 2K5 ACTIVE SOIC D 8 2500 Green ROHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR115U 2K5E4 ACTIVE SOIC D 8 2500 Green RoHS amp CU NIPDAU Level 3 260C 168 HR no Sb Br XTR115UA ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR115UA 2K5 ACTIVE SOIC D 8 2500 Green ROHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR115UA 2K5E4 ACTIVE SOIC D 8 2500 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR115UAE4 ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR115UG4 ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116U ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116U 2K5 ACTIVE SOIC D 8 2500 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116U 2K5G4 ACTIVE SOIC D 8 2500 Green ROHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116UA ACTIVE SOIC D 8 100 Green RoHS amp CUNIPDAU Level 3 260C 168 HR no Sb Br XTR116UA 2K5 ACTIVE SOIC
12. n appropriate level of protection against voltage surges Characterization tests on several production lots showed no damage with loop supply voltages up to 65V Most surge protection zener diodes have a diode character istic in the forward direction that will conduct excessive current possibly damaging receiving side circuitry if the loop connections are reversed If a surge protection diode is used a series diode or diode bridge should be used for protection against reversed connections RADIO FREQUENCY INTERFERENCE The long wire lengths of current loops invite radio frequency interference RF can be rectified by the input circuitry of the XTR115 6 or preceding circuitry This generally appears as an unstable output current that varies with the position of loop supply or input wiring Interference may also enter at the input terminals For integrated transmitter assemblies with short connection to the sensor the interference more likely comes from the current loop connections XTR115 XTR116 Maximum Vpg must be less than minimum voltage rating of zener diode 1N4148 Diodes The diode bridge causes a 1 4V loss in loop supply voltage NOTE 1 Zener Diode 36V 1N4753A or Motorola P6KE39A Use lower voltage zener diodes with loop power supply voltages less than 30V for increased protection See Over Voltage Surge Protection FIGURE 4 Reverse Voltage Operation and Over Voltage Surge Protect
13. n full scale input voltages range from 1V XTR115 XTR116 XTR115 2 5V XTR116 4 096V Voltage Reference and upward Full scale inputs greater than 0 5V are recom mend to minimize the effect of offset voltage and drift of A1 EXTERNAL TRANSISTOR The external transistor Q1 conducts the majority of the full scale output current Power dissipation in this transistor can approach 0 8W with high loop voltage 40V and 20mA output current The XTR115 6 is designed to use an external transistor to avoid on chip thermal induced errors Heat produced by Q1 will still cause ambient temperature changes that can affect the XTR115 6 To minimize these effects locate Q1 away from sensitive analog circuitry including XTR115 6 Mount Q1 so that heat is conducted to the outside of the transducer housing The XTR115 6 is designed to use virtually any NPN transis tor with sufficient voltage current and power rating Case style and thermal mounting considerations often influence the choice for any given application Several possible choices are listed in Figure 1 A MOSFET transistor will not improve the accuracy of the XTR115 6 and is not recommended 45V Regulator All return current from laeg and lage Ine R 2 475kQ For lo 4mA to 20mA lin 40A to 2004A With Ry 20kQ Vin 0 8V to 4V NOTE 1 See also Figure 5 FIGURE 1 Basic Circuit
14. ns are nominal Device Package Type Package Drawing Pins SPQ Length mm Width mm Height mm XTR115U 2K5 SOIC D 8 2500 346 0 346 0 29 0 XTR115UA 2K5 SOIC D 8 2500 346 0 346 0 29 0 XTR116U 2K5 SOIC D 8 2500 346 0 346 0 29 0 XTR116UA 2K5 SOIC D 8 2500 346 0 346 0 29 0 Pack Materials Page 2 MECHANICAL DATA D R PDSO GB8 PLASTIC SMALL OUTLINE PACKAGE 4040047 2 10 2008 All linear dimensions are in inches millimeters This drawing is subject to change without notice Body length does not include mold flash protrusions or gate burrs Mold flash protrusions or gate burrs shall not exceed 006 0 15 per end Body width does not include interlead flash Interlead flash shall not exceed 017 0 43 per side Reference JEDEC MS 012 variation AA NOTES pps 8 Texas INSTRUMENTS www ti com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries Tl reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such inform
15. re soldering 10s Junction Temperature NOTE 1 Stresses above these ratings may cause permanent damage Exposure to absolute maximum conditions for extended periods may degrade device reliability ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD Texas Instru ments recommends that all integrated circuits be handled with appropriate precautions Failure to observe proper handling and installation procedures can cause damage ESD damage can range from subtle performance degrada tion to complete device failure Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications 1 XTR115 XTR116 WO Texas 3 SBOS124A www ti com TYPICAL PERFORMANCE CURVES At T4 25 C V 24V Ry 20kQ and TIP29C external transistor unless otherwise noted CURRENT GAIN vs FREQUENCY QUIESCENT CURRENT vs TEMPERATURE 260 _ 240 lt x t a 2 220 S i S o 5 8 200 N o 6 180 160 10k 100k 1M 75 50 25 0 25 50 75 100 125 Frequency Hz Temperature C REFERENCE VOLTAGE vs TEMPERATURE OVER SCALE CURRENT vs TEMPERATURE 0 1 With External Transistor Kk T D 0 E B i g 5 s o 0 1 o 2 o 5
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18. tary and thus CAS numbers and other limited information may not be available for release In no event shall TI s liability arising out of such information exceed the total purchase price of the TI part s at issue in this document sold by TI to Customer on an annual basis Addendum Page 2 X3 Texas PACKAGE MATERIALS INFORMATION INSTRUMENTS www ti com 11 Mar 2008 TAPE AND REEL INFORMATION REEL DIMENSIONS TAPE DIMENSIONS Reel Diameter Dimension designed to accommodate the component width Dimension designed to accommodate the component length Dimension designed to accommodate the component thickness y Overall width of the carrier tape Y Pitch between successive cavity centers t Reel Width W1 QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE Sprocket Holes User Direction of Feed All dimensions are nominal Device Package Package Pins SPQ Reel Reel A0 mm BO mm KO mm P1 Ww Pini Type Drawing Diameter Width mm mm Quadrant mm W1 mm XTR115U 2K5 SOIC D 8 2500 330 0 12 4 6 4 5 2 2 1 8 0 12 0 Q1 XTR115UA 2K5 SOIC D 8 2500 330 0 12 4 6 4 5 2 2 1 8 0 12 0 Q1 XTR116U 2K5 SOIC D 8 2500 330 0 12 4 6 4 5 2 2 1 8 0 12 0 Q1 XTR116UA 2K5 SOIC D 8 2500 330 0 12 4 6 4 5 2 2 1 8 0 12 0 Q1 Pack Materials Page 1 X3 Texas PACKAGE MATERIALS INFORMATION INSTRUMENTS www ti com 11 Mar 2008 TAPE AND REEL BOX DIMENSIONS w All dimensio
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TEXAS INSTRUMENTS XTR115 XTR116 4 20mA CURRENT LOOP TRANSMITTERShandbook