LM433 Dual Op Amp with On-Chip Fixed 2.5V Reference General Description Features The LM433 integrates two operational amplifiers and one 2.5V reference. The reference is based on the LMV431 adjustable shunt regulator with the output voltage adjusted to a fixed 2.5V. The Op Amps are similar to the LM358 with a common-mode input range that includes ground. Integrating the reference and Op Amps creates a solution for low cost charging applications. Dual Op Amp Circuitry Applications (Typical for VS = 5V) n Input offset voltage n Input offset current n Input bias current n Common-mode input voltage range n Power supply current 0.6mV 1nA 3nA 0V to VS−1V 150µA n Low cost charging circuitry n Power supplies and adapters Reference Circuitry n Reference voltage 2.5V n Reference voltage deviation (−40˚C to 85˚C) 4mV n Sink Current Capability 0.2mA to 10mA Connection Diagram Application Circuit 8-Pin SOIC 20003902 Optocoupler Driver Circuit for Power Supply Isolation 20003901 Top View Ordering Information Package 8-Pin SOIC Part Number Package Marking LM433MA LM433MAX © 2004 National Semiconductor Corporation DS200039 Transport Media NSC Drawing LM433MA Rails M08A LM433MA 2.5k Unit Tape and Reel www.national.com LM433 Dual Op Amp with On-Chip Fixed 2.5V Reference July 2001 LM433 Absolute Maximum Ratings (Notes 1, 3) Input Voltage Range If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Suppy Voltage (VS) Operating Ratings(Note 2),(Note 3) Temperature Range 20V Storage Temperature −40˚C to 85˚C Supply Voltage (Note 8) −65˚C to 150˚C Junction Temperature (TJ) −0.3V to 20V 2.5V to 16V Thermal Resistance(θJA) 162˚C/W 150˚C ESD Human Body Model 2kV Electrical Characteristics The following specifications apply for both amplifiers at VS = 5V, VCM = 2.5V, VO = 2.5V, RL = ∞, and TJ = 25˚C, unless otherwise noted. Symbol Parameter Conditions Min (Note 5) Typ (Note 4) Max (Note 5) Units −7 2 7 mV OP Amp Circuitry VOS Input Offset Voltage Amplifier B only IOS Input Offset Current Amplifier B only 1 50 nA IB Input Bias Current Amplifier B only 3 150 nA VCM Common-Mode Input Voltage Range Amplifier B only, CMRR > 50dB VS-1 V IS Power Supply Current Total for both amplifiers 500 µA AV Voltage Gain VS = 16V, 1V < VO < 11V, RL = 10kΩ connected to VS/2 VOL Output Voltage Low VOH Output Voltage High ISOURCE ISINK 0 150 65 100 VS – 1.5 VS – 1.3 V Output Current Source 20 30 mA Output Current Sink 5 11 mA 2 dB 50 mV Reference Circuitry For Op Amp A The following specifications apply for IZ = 200µA and TJ = 25˚C, unless otherwise noted. VZ Reference Voltage at IN+ Terminal + VZDEV Reference Voltage Deviation at IN Terminal Over Temperature (Note 6),(Note 9) IZ (MIN) Minimum Cathode Current for Regulation at IN+ (VZ) Terminal rz Dynamic Output Impedance (Note 7) 2.425 −40˚C ≤ TJ ≤ 85˚C 200µA < IZ < 1mA, Freq = 0Hz 2.5 2.575 V 4 65 mV 150 200 µA 0.2 Ω Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2: Operating Rating indicate conditions for which the device is functional. These rating do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 3: All voltages are measured with respect to GND = 0VDC, unless otherwise specified. Note 4: Typicals represent the most likely parametic norm. Note 5: Guaranteed to National’s Average Outgoing Quality Level (AOQL). Note 6: Reference voltage deviation, VZDEV, is defined as the maximum variation of the reference input voltage over the full temperature range. Note 7: The Dynamic Output Impendance, rz, is defined as rz = ∆VZ/∆IZ . Note 8: Minimum value of operating voltage is for Amplifier B only. Note 9: Typical Temperature drift ∆V/∆T = 12.8ppm/˚C www.national.com 2 LM433 Dual Op Amp with On-Chip Fixed 2.5V Reference Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin SOIC NS Package Number M08A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. 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