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1、Isolation AmplifierTechnical DataHCPL-7800AHCPL-7800Features 15 kV/s Common-Mode Rejection at VCM = 1000 V Compact, Auto-Insertable Standard 8-pin DIP Package 0.00025 V/V/C Gain Driftvs. Temperature 0.3 mV Input Offset Voltage 100 kHz Bandwidth 0.004% Nonlinearity Worldwide Safety Approval:UL 1577 (
2、3750 Vrms/1 min.)and CSA, VDE 0884 (pending) Advanced Sigma-Delta ()A/D Converter Technology Fully Differential Circuit TopologyApplications Motor Phase and Rail Current Sensing Inverter Current Sensing Switched Mode Power Supply Signal Isolation General Purpose Current Sensing and Monitoring Genera
3、l Purpose Analog Signal IsolationDescriptionThe HCPL-7800(A) isolationamplifier family was designedfor current sensing in electronicmotor drives. In a typicalimplementation, motor currents flow through an external resistor and the resulting analog voltage drop is sensed by the HCPL-7800(A). A differ
4、entialoutput voltage is created on theother side of the HCPL-7800(A) optical isolation barrier. This differential output voltage is proportional to the motor current and can be converted to a single- ended signal by using an op-amp as shown in the recommended application circuit. Sincecommon-mode vo
5、ltage swings ofseveral hundred volts in tens ofnanoseconds are common inmodern switching inverter motordrives, the HCPL-7800(A)was designed to ignore very highcommon-mode transient slewrates (of at least 10 kV/s).The high CMR capability of theHCPL-7800(A) isolation amplifier provides the precision a
6、ndstability needed to accuratelymonitor motor current in highFunctional DiagramVDD11IDD1 IDD28VDD2V OUT+V OUTGND2VIN+2 + 7+VIN36GND1 4 5 SHIELDnoise motor control environ-ments, providing for smoothercontrol (less “torque ripple”) invarious types of motor controlapplications.The product can also be
7、used forgeneral analog signal isolationapplications requiring highaccuracy, stability, and linearityunder similarly severe noise con-ditions. For general applications,we recommend the HCPL-7800(gain tolerance of 3%). Forprecision applications Agilentoffers the HCPL-7800A with part-to-part gain toler
8、ance of 1%.The HCPL-7800(A) utilizes sigmadelta (-) analog-to-digitalconverter technology, chopperstabilized amplifiers, and a fullydifferential circuit topology.CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component toprevent damage and/or degradat
9、ion which may be induced by ESD.2Together, these features deliverunequaled isolation-mode noiserejection, as well as excellent offsetand gain accuracy and stabilityover time and temperature. Thisperformance is delivered in acompact, auto-insertable, industrystandard 8-pin DIP package thatmeets world
10、wide regulatory safetystandards. (A gull-wing surfacemount option #300 is alsoavailable).Ordering InformationSpecify Part Number followed by Option Number (if desired).HCPL-7800A = 1% Gain Tol.; Mean Gain = 8.00HCPL-7800 = 3% Gain Tol.; Mean Gain = 8.00Option: #YYYNo Option = Standard DIP package, 5
11、0 per tube300 = Surface Mount Option500 = Tape/Reel Packaging Option, 1k min. per reelPackage Outline Drawings Standard DIP Package9.65 0.25 (0.380 0.010)8 7 6 5A 7800 YYWWDATE CODE1 2 3 47.62 0.25(0.300 0.010) 1.78 (0.070) MAX.1.19 (0.047) MAX.6.35 0.25 (0.250 0.010)4.70 (0.185) MAX.0.51 (0.020) MI
12、N.2.92 (0.115) MIN. 1.080 0.320(0.043 0.013)0.65 (0.025) MAX.2.54 0.25(0.100 0.010)5 TYP.0.20 (0.008)0.33 (0.013)DIMENSIONS IN MILLIMETERS AND (INCHES).Note: Initial or continued variation in the color of the HCPL-7800(A)s white mold compound is normal and does not affect device performance or relia
13、bility.3Gull Wing Surface Mount Option 300PAD LOCATION (FOR REFERENCE ONLY)9.65 0.25(0.380 0.010)1.016 (0.040)1.194 (0.047)8 7 6 5A 7800 YYWW6.350 0.25(0.250 0.010)4.826TYP.(0.190) 9.398 (0.370)9.960 (0.390)1 2 3 41.194 (0.047)1.778 (0.070)0.381 (0.015)0.635 (0.025) 1.19(0.047) MAX. 1.780(0.070) MAX
14、.9.65 0.25(0.380 0.010)7.62 0.25(0.300 0.010)4.19MAX.(0.165)0.20 (0.008)0.33 (0.013) 1.080 0.320(0.043 0.013) 2.54(0.100) BSC 0.635 0.130(0.025 0.005)0.635 0.25(0.025 0.010)12 NOM.DIMENSIONS IN MILLIMETERS (INCHES).TOLERANCES (UNLESS OTHERWISE SPECIFIED):xx.xx = 0.01xx.xxx = 0.005LEAD COPLANARITY MAXIMUM: 0.102 (0.004)Maximum Solder Reflow Thermal Profile260240220 200180160140120100T = 115C, 0.3C/SECT = 145C, 1C/SEC8060T = 100C, 1.5C/SEC4020
