SPX385AS-L-1-2TR

SPX385-2.5 Micropower Voltage Reference FEATURES N/C Trimmed Bandgap ............................ 1% and 2% Wide Operating Current ............... 20A to 20mA Extended Temperature Range ... -40C to +85C SPX385 Dynamic Impedance .............................. 1 max 3 Pin SOT-23 Offered in SOT-23, TO-92, SOIC, and SOT-89 Improved Replacement for LM185/285/385-2.5V, Cathode Anode AS385-2.5 Now Available in Lead Free Packaging Temp Co 140ppm/C Refer to page 4 for pinouts. APPLICATIONS Error Amplifiers Battery Operating Equipment Single Supply Amplifier Adjustable Supplies Monitors / VCR / TV Switching Power Supplies Personal Computers DESCRIPTION The SPX385-2.5 is a micropower 2-terminal band-gap voltage reference with a very wide operating current range from 20A to 20mA that provides a stable voltage. The high stability of this device is primarily the result of the low temperature coefficient Thin Film Resistor process and Laser Trimming of the output voltage at the wafer level. The SPX385-2.5 is available in a SOT-23, TO-92, SOIC-8 and SOT-89 package with an operating temperature range of -40C to 85C. A 1.2 and 5 volt device is also available - SPX385-1.2 and SPX385-5. BLOCK DIAGRAM Cathode (K) 500k + - 500k 1.25V Figure 1: Block Diagram Anode (A) Date: 02/29/2008 SPX385-2.5 Micropower Voltage Reference Copyright 2008 Exar Corporation 1ABSOLUTE MAXIMUM RATINGS TYPICAL THERMAL RESISTANCES PACKAGE 0 0 TYPICAL DERATING Stresses greater than those listed under ABSOLUTE MAXIMUM RAT- JA JC INGS may cause permanent damage to the device. This is a stress rating TO-92 160C/W 80C/W 6.3 mW/C only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not SOT-23 575C/W 150C/W 1.7 mW/C implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. SOIC-8 175C/W 45C/W 5.7 mW/C SOT-89 110C/W 8C/W 9.1 mW/C Reverse Current (I ) ............................................................. 30mA KA Forward Current (I ) ............................................................. 10mA AK Typical deratings of the thermal resistances are Operating Temperature Range (T ) ............................ -40 to +85C A given for ambient temperature >25. Junction Temperature (T ) ..................................................... 150C J Storage Temperature (T ) ....................................... - 65 to 150C STG Lead Temperature (Soldering 10 sec.), T ............................. 300C L ELECTRICAL CHARACTERISTICS I = 100A, T = 25C, unless otherwise specified. IN A SPX385A-2.5 SPX385-2.5 PARAMETER CONDITIONS MIN. TYP. MAX MIN. TYP. MAX. UNIT Reference Voltage 2.475 2.500 2.525 2.450 2.500 2.550 V Dynamic Output F = 20Hz 0.6 1.0 0.6 1.0 Impedance I = 100A R Reference Voltage 20A I 20mA 10 20 10 20 mV R Change with I . R Temperature Coefficient Note 1 80 140 80 140 ppm/C Minimum Operating Current 15 20 15 20 A Output Wideband Noise 10Hz f 10kHz 120 120 Vrms Long Term Stability T=1000Hr 60 60 ppm T = 25C 0.1C A Operating Temperature -40 +85 -40 +85 C Note 1. Three-point measurement guarantees the error band over the specified temperature range. *CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) ppm % mV 000 DVKA (mV) DV KA TC in mV/C= DT A D DVKA -10 x 100 () DV at 25C KA TC in %/C= 5000 0.5 DT A DV KA 6 x10 ()DVKA at 25C TC in ppm/C= 015 304560 7590 105 DT A Junction Temperature (C) 0.07 mV/C 0.003 %/C 27 ppm/C Figure 2. V vs. Temperature KA Date: 02/29/208 SPX385-2.5 Micropower Voltage Reference Copyright 2008 Exar Corporation 2