52458 Mii Dual Current-to-Current Opto-Isolator, High Temperature (200°C) MICROPAC MICROCIRCUITS PRODUCTS DIVISION Features: Applications: • • • • • Hermetically Sealed Package Optically Coupled Input/Output Isolation Tested to 1000 VDC 200°C Operation Signal Isolation DESCRIPTION The 52458 is a Current-to-Current Opto-Isolator designed for high temperature applications to 200ºC. Functionally, the device operates as a Current-to-Current Transformer with an output current proportional to the input current. The current transfer ratio is tightly controlled for temperatures from 25ºC through 200ºC. ABSOLUTE MAXIMUM RATINGS Continuous Input Current .......................................................................................................................... 20mA Storage Temperature Range ..................................................................................................... -65ºC to +200ºC Operating Temperature............................................................................................................ -55ºC to +200ºC Lead Solder Temperature for 10 seconds ..................................................................................................300ºC Reverse Input Voltage ............................................................................................................................. 6 VDC RECOMMENDED OPERATING CONDITIONS: Parameter Symbol Output Voltage VO Input Current IF (ON) Input Voltage Operating Case Temperature Min. Max. Units 1.0 VDC 5 15 mA VF 1.1 1.6 VDC TC -55 200 °C Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 1 of 7 52458 Temperature Current-to-Current Opto-Isolator, High ELECTRICAL SPECIFICATIONS TC= 25°C to +200°C unless otherwise specified Parameter Sym. Min. Typ.* Max. Units Input / Output Forward Voltage VF 1.6 2.2 VDC IF = 10 mA Input / Output Reverse Breakdown Voltage VR 6 40 VDC IR = 10 µA Input-Output Leakage II-O Turn-On Time tON 150 ns Turn-Off time tOFF 100 ns Rise Time tR 130 ns Fall Time tF 90 ns 80 µA Output Current 1 µA Test Conditions Notes RH ≤ 45%, t = 5 s VI-O = 1000 VDC TC = 25°C IF = 2.5 mA EO = OV, shorted NOTE 4 1,2 3 IF = 10 mA Notes: 1. Input pins are shorted together and output pins are shorted together. 2. Input-output potential applied momentarily, not an operating condition. 3. Rise time is measured from 10% to 90% of output current. Fall time is measured from 90% to 10% of output. 4. Measured values limited by the test Transimpedance circuit. Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 2 of 7 52458 Temperature Dual Current-to-Current Opto-Isolator, High Figure 1. Output Current vs. Temperature 60.0 0.5 Output current (uA) 50.0 1.0 1.5 40.0 2.0 2.5 30.0 3.0 3.5 20.0 4.0 4.5 10.0 5.0 0.0 -55 c 25 c 150 c 200 c Current Transfer Ratio (Typical) 60.0 IOUT (uA) 50.0 25C 40.0 150C 200C 30.0 -55C 20.0 10.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 IIN (mA) Figure 2. Output Current vs. Input Current (0.5mA – 5mA) Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 3 of 7 52458 Temperature Dual Current-to-Current Opto-Isolator, High Current Transfer Ratio (Typical) 250.0 IOUT (uA) 200.0 25C 150.0 150C 200C -55C 100.0 50.0 0.0 0.0 5.0 10.0 15.0 20.0 IIN (mA) Figure 3. Output Current vs. Input Current (0.5mA – 20mA) Pin 1 2 3 4 5 6 7 8 1. ESD symbol (∆) indicates pin 1. Function + in (section 1) - in (section 1) - out (section 2) + out (section 2) + in (section 2) - in (section 2) - out (section 1) + out (section 1) Table 1. Pin Outs Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 4 of 7 52458 Temperature Dual Current-to-Current Opto-Isolator, High Note: Package is a Ceramic 8 Pin DIP Figure 4. Case Outline Application Notes: 52458.01 Isolated Current Monitor. Figure 1 is a simple, moderately accurate circuit for monitoring an isolated load current. The heart of the circuit is the 52458 Opto Coupler. The LED current of the coupler is the sum of 1; the bias current of Q2, Q1 / HFE (Q1) and Q3 / HFE (Q3) and 2; the collector current of Q1. Q1 and Q3 form a current mirror with an Emitter current ration if R3 / R2. A Q3 emitter current of 0.5A represents a 0.010A current at the emitter of Q1 and a total load current of 0.510A. The OP Amp output voltage is the output current of the 52458 Opto Coupler times the R FEEDBACK value. In this circuit case, 1µA of Detector current produces a 0.1V output. The total circuit then has a transfer value of (10mA of LED current = 510mA load current) producing 80µA of Detector current x 100k Ohm = 8V output. This gives 8V output for a load current of 510mA or a sensitivity of 1 Volt per 63.75mA. Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 5 of 7 52458 Temperature Dual Current-to-Current Opto-Isolator, High V out / Current Linearity Circuit Voltage verses Output Current 7 6 I Output V Output 5 4 3 2 1 0 0 140 233 mA Output 330 427 450 400 350 300 250 200 150 100 50 0 2.487 3.297 3.849 4.353 4.888 Circuit voltage Drop Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 6 of 7 52458 Temperature Dual Current-to-Current Opto-Isolator, High The following chart illustrates the Optocoupler output as a function of Load current for the circuit of Figure 1. Vin Volts 10 10 10 10 10 30 30 30 30 30 I Load mA 0 140 233 330 427 0 140 233 330 427 Voltage across Power Circuit 2.487 3.297 3.849 4.353 4.888 2.517 3 3.837 4.376 4.876 V Out .12 1.95 3.43 4.87 6.37 .19 1.96 3.42 4.89 6.36 The following chart illustrates the effects of temperature on the Coupler output. Vin Volts 20 20 20 I Load mA 0.33 0.33 0.33 Temp. Deg, C 25 125 150 Temp effects @ 0.33A V out / I out verses input Voltage 4.9 6 4.85 V Output 5 10 V in 20 V in 3 30 V in V Output 7 4 I Out uA 48.8 48.7 47 4.8 4.75 4.7 2 4.65 1 4.6 0 0 140 233 mA Output 330 427 25 125 150 Temperature Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION •• 905 E. Walnut St., Garland, TX 75040 •• (972) 272-3571 •• Fax (972) 494-2281 www.micropac.com E-MAIL: [email protected] 5/19/05 Page 7 of 7