IP431AH MECHANICAL DATA Dimensions in mm (inches) 8.89 (0.35) 9.40 (0.37) FEATURES 7.75 (0.305) 8.51 (0.335) • VOLTAGE REFERENCE TOLERANCE ±1% 4.19 (0.165) 4.95 (0.195) 12.70 (0.500) min. • PROGRAMMABLE OUTPUT VOLTAGE TO 36V 0.89 max. (0.035) • EQUIVALENT FULL RANGE TEMPERATURE COEFFICIENT OF 30ppm/°C TYPICAL 0.41 (0.016) 0.53 (0.021) dia. • TEMPERATURE COMPENSATED FOR OPERATION OVER FULL RATED OPERATING TEMPERATURE RANGE 5.08 (0.200) typ. 2.54 (0.100) 2 1 3 0.66 (0.026) 1.14 (0.045) • SINK CURRENT CAPABILITY 1 TO 100 mA • FAST TURN–ON RESPONSE 0.71 (0.028) 0.86 (0.034) • LOW DYNAMIC OUTPUT IMPEDANCE Ω typical) (0.2Ω 45˚ • LOW OUTPUT NOISE VOLTAGE DESCRIPTION TO39 PACKAGE PIN 1 = REF PIN 2 = CATHODE PIN 3 = ANODE The IP431A circuit is a monolithic three terminal programmable shunt regulator diode. This 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 1mA to 100mA and a typical dynamic impedance of 0.2Ω. 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. ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) 37V 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 TO39 Package Derate Above 25°C 1.5W 15mW/°C 150°C TJ Maximum Operating Junction Temperature TA Operating Ambient Temperature Range - 55 to +125°C TSTG Storage Temperature Range - 65 to 150°C Semelab plc. Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. Website: http://www.semelab.co.uk E-mail: [email protected] Prelim. 3/99 IP431AH THERMAL CONDITIONS RθJA RθJC Thermal resistance, junction to Ambient, 160°C/W Thermal resistance, junction to Case 20°C/W 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 ∆VREF ∆VREF ∆VKA IREF ∆IREF IMIN Reference Input Voltage Reference Input Voltage Over Temperature Range 1 Test Conditions Min. Typ. Max. VKA = VREF 2.47 2.495 2.52 IK = 10mA TA = -55 to +125°C * VKA = VREF IK = 10mA Ratio of Reference Voltage Change to TA = -55 to +125°C * 2.426 2.564 15 -1.5 -2.7 ∆VKA = 36V to 10V -0.7 -2 R1 = 10kΩ R2 = ∞ 1 IK = 10mA TA = -55 to +125°C * Reference Input Current Deviation Over R1 = 10kΩ R2 = ∞ Temperature Range IK = 10mA TA = -55 to +125°C * Reference Input Current Minimum Cathode Current For Regulation IOFF Off–State Cathode Current |Zka| Dynamic Impedance 2 Semelab plc. IK = 10mA V mV 44 ∆VKA = 10V to VREF Change in Cathode to Anode Voltage Units mV/V VKA = VREF VKA = 36V VREF = 0 VKA = VREF f ≤ 1kHz ∆IK = 1mA to 100mA Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. Website: http://www.semelab.co.uk E-mail: [email protected] 4 µA 7 1 3 µA 0.5 1 mA 3 1000 nA 0.2 0.5 Ω Prelim. 3/99