IP431CSM4 PROGRAMMABLE PRECISION REFERENCE 1.40 ± 0.15 (0.055 ± 0.006) 5.59 ± 0.13 (0.22 ± 0.005) 0.23 rad. (0.009) 3 2 4 1 1.27 ± 0.05 (0.05 ± 0.002) 3.81 ± 0.13 (0.15 ± 0.005) 0.64 ± 0.08 (0.025 ± 0.003) 0.25 ± 0.03 (0.01 ± 0.001) 0.23 min. (0.009) FEATURES • VOLTAGE REFERENCE TOLERANCE ±1% • PROGRAMMABLE OUTPUT VOLTAGE TO 36V 2.03 ± 0.20 (0.08 ± 0.008) 1.02 ± 0.20 (0.04 ± 0.008) LCC3 HERMETICALLY SEALED CERAMIC SURFACE MOUNT PACKAGE PIN 1 - NOT CONNECTED PIN 2 - CATHODE PIN 3 - REFERENCE PIN 4 - ANODE • EQUIVALENT FULL RANGE TEMPERATURE COEFFICIENT OF 30ppm/°C TYPICAL • TEMPERATURE COMPENSATED FOR OPERATION OVER FULL RATED OPERATING TEMPERATURE RANGE • SINK CURRENT CAPABILITY 1 TO 100 mA • FAST TURN–ON RESPONSE PART NUMBER AMBIENT TEMP. RANGE IP431CSM4 -55 TO +125°C • LOW DYNAMIC OUTPUT IMPEDANCE (0.2W typical) • LOW OUTPUT NOISE VOLTAGE ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) VKA Cathode To Anode Voltage IK Cathode Current Range -100 to +150mA IREF Reference Input Current Range -0.05 to +10mA PD Power Dissipation @ TA = 25°C 37V CSM4 Package Derate Above 25°C TJ Maximum Operating Junction Temperature TA Operating Ambient Temperature Range TSTG Storage Temperature Range Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: [email protected] Website: http://www.semelab.co.uk 0.80W 6.4W/°C 150°C See Table Above –65 to 150°C Prelim. 4/98 IP431CSM4 DESCRIPTION BLOCK DIAGRAM The IP431A circuit is a monolithic three terminal programmable shunt regulator diode. The voltage reference operates as a low temperature coefficient zener which is programmable between VREF (2.5V) and 36 volts using two external resistors. The device has a wide operating current range of 1 mA to 100mA and a typical dynamic impedance of 0.2 W . Active output circuitry provides a very sharp turn-on characteristic making these devices excellent replacements for zener diodes in many applications. Being a shunt regulator it can be used as either a positive or negative voltage reference. CATHODE REF 2.5 V REF ANODE RECOMMENDED OPERATING CONDITIONS VKA Cathode To Anode Voltage VREF to 36V IK Cathode Current Range 1.0 to 100mA ELECTRICAL CHARACTERISTICS (TA = 25 °C unless otherwise stated) Parameter VREF Reference Input Voltage DVREF Reference Input Voltage Over DVREF DVKA Ratio of Reference Voltage Change to IREF Reference Input Current DIREF Reference Input Current Deviation Over IMIN Temperature Range 1 (Figure 1) Test Conditions Min. IP431AM Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA VKA = VREF (Figure 1) IK = 10mA Change in Cathode to Anode Voltage (Figure 2) 15 DVKA = 36V to 10V -0.7 -2 R1 = 10kW R2 = ¥ 1 IK = 10mA TA = -55 to +125°C * R1 = 10kW R2 = ¥ TA = -55 to +125°C * VKA = VREF (Figure 1) IOFF Off–State Cathode Current (Figure 3) VKA = 36V |Zka| Dynamic Impedance 2 (Figure 1) VKA = VREF VREF = 0 f £ 1kHz DIK = 1mA to 100mA Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: [email protected] Website: http://www.semelab.co.uk V mV 44 -2.7 For Regulation Semelab plc. 2.564 -1.5 (Figure 2) IK = 10mA Minimum Cathode Current TA = -55 to +125°C * 2.426 DVKA = 10V to VREF IK = 10mA (Figure 2) Temperature Range TA = -55 to +125°C * Units mV/V 4 mA 7 1 3 mA 0.5 1 mA 3 1000 nA 0.2 0.5 W Prelim. 4/98 IP431CSM4 ELECTRICAL CHARACTERISTICS (TA = 25 °C unless otherwise stated) Parameter VREF Reference Input Voltage DVREF Reference Input Voltage Over DVREF DVKA Ratio of Reference Voltage Change to IREF Reference Input Current DIREF Reference Input Current Deviation Over IMIN Temperature Range 1 (Figure 1) Test Conditions Min. IP431AI Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA (Figure 1) IK = 10mA (Figure 2) R1 = 10kW R2 = ¥ 1 IK = 10mA TA = -40 to +85°C * R1 = 10kW R2 = ¥ IOFF Off–State Cathode Current (Figure 3) VKA = 36V |Zka| Dynamic Impedance 2 (Figure 1) VREF Reference Input Voltage DVREF Reference Input Voltage Over DVREF DVKA Ratio of Reference Voltage Change to IREF Reference Input Current DIREF Reference Input Current Deviation Over IMIN Temperature Range (Figure 1) VKA = VREF (Figure 2) -2.7 -2 4 mA f £ 1kHz 0.8 2.5 mA 0.5 1 mA 3 1000 nA 0.2 0.5 W Units Test Conditions Min. IP431AC Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA (Figure 1) IK = 10mA TA = 0 to +70°C * TA = 0 to +70°C * 2.453 2.537 3 -1.5 -2.7 DVKA = 36V to 10V -0.7 -2 R1 = 10kW R2 = ¥ 1 IK = 10mA TA = 0 to +70°C * R1 = 10kW R2 = ¥ TA = 0 to +70°C * VKA = VREF For Regulation (Figure 1) IOFF Off–State Cathode Current (Figure 3) VKA = 36V |Zka| Dynamic Impedance 2 (Figure 1) VKA = VREF VREF = 0 f £ 1kHz DIK = 1mA to 100mA Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: [email protected] Website: http://www.semelab.co.uk V mV 17 DVKA = 10V to VREF IK = 10mA (Figure 2) IK = 10mA Minimum Cathode Current Semelab plc. VREF = 0 DIK = 1mA to 100mA (Figure 2) Temperature Range TA = -40 to +85°C * VKA = VREF Change in Cathode to Anode Voltage mV 30 6.5 VKA = VREF (Figure 1) V mV/V -0.7 For Regulation Parameter -1.5 DVKA = 36V to 10V (Figure 2) IK = 10mA Minimum Cathode Current 2.55 7 TA = -40 to +85°C * DVKA = 10V to VREF IK = 10mA (Figure 2) 1 2.44 VKA = VREF Change in Cathode to Anode Voltage Temperature Range TA = -40 to +85°C * Units mV/V 4 mA 5.2 0.4 1.2 mA 0.5 1 mA 3 1000 nA 0.2 0.5 W Prelim. 4/98 IP431CSM4 FIGURE 1 TEST CIRCUIT FOR VKA = VREF Input V KA NOTE 1 The deviation parameter DVREF is defined as the differences between the maximum and minimum values obtained over the full operating ambient temperature range that applies. IK V REF Max V REF DVREF = VREF Max VREF Min DTA = T2 - T1 V REF Min T1 FIGURE 2 TEST CIRCUIT FOR VKA > VREF Input V KA IK The average temperature coefficient of the reference input voltage, µVREF is defined as: µVREF = I REF T2 AMBIENT TEMPERATURE ppm = °C ( DVREF ) VREF @ 25°C DTA x 106 = DVREF x 106 DTA (VREF @ 25°C) V REF µVREF can be positive or negative depending on whether µVREF Min or µVREF Max occurs at the lower ambient temperature. ( VKA = VREF 1+ R1 R2 )+I REF x R1 Example: DVREF = 8.0 mV and slope is positive, VREF @ 25°C = 2.495V, DTA = 70°C µVREF = FIGURE 3 TEST CIRCUIT FOR Ioff 0.008 x 106 = 45.8 ppm/°C = 45.8 ppm/°C 70 (2.495) NOTE 2 Input I off V KA The dynamic impedance Zka is defined as: DVKA |Zka| = DIK When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: ( |Zka| » |Zka| 1+ R1 R2 Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: [email protected] Website: http://www.semelab.co.uk ) Prelim. 4/98