LM432MA

LM432 Dual Op Amp with On-Chip Fixed 2.5V Reference July 2001 LM432 Dual Op Amp with On-Chip Fixed 2.5V Reference General Description The LM432 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. Features Dual Op Amp Circuitry (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 Applications 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 8-Pin SOIC Application Circuit 10139002 Optocoupler Driver Circuit for Power Supply Isolation 10139001 Top View Ordering Information Package 8-Pin SOIC Part Number LM432MA LM432MAX Package Marking LM432MA LM432MA Transport Media Rails 2.5k Unit Tape and Reel NSC Drawing M08A © 2004 National Semiconductor Corporation DS101390 www.national.com LM432 Absolute Maximum Ratings (Notes 1, 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Suppy Voltage (VS) Storage Temperature Junction Temperature (TJ) ESD Human Body Model 20V −65˚C to 150˚C 150˚C 2kV Input Voltage Range −0.3V to 20V Operating Ratings(Note 2),(Note 3) Temperature Range Supply Voltage (Note 8) Thermal Resistance(θJA) −40˚C to 85˚C 2.5V to 16V 162˚C/W 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 OP Amp Circuitry VOS IOS IB VCM IS AV VOL VOH ISOURCE ISINK VZ VZDEV Input Offset Voltage Input Offset Current Input Bias Current Common-Mode Input Voltage Range Power Supply Current Voltage Gain Output Voltage Low Output Voltage High Output Current Source Output Current Sink Reference Voltage at IN+ Terminal Reference Voltage Deviation at IN Terminal Over Temperature (Note 6),(Note 9) Minimum Cathode Current for Regulation at IN+ (VZ) Terminal Dynamic Output Impedance (Note 7) 200µA < IZ < 1mA, Freq = 0Hz + Parameter Conditions Min (Note 5) −4 Typ (Note 4) 0.6 1 3 Max (Note 5) 4 50 150 VS-1 Units Amplifier B only Amplifier B only Amplifier B only Amplifier B only, CMRR > 50dB Total for both amplifiers VS = 16V, 1V < VO < 11V, RL = 10kΩ connected to VS/2 mV nA nA V µA dB 0 150 65 100 2 VS – 1.5 20 5 2.450 VS – 1.3 30 11 2.5 4 500 50 mV V mA mA Reference Circuitry For Op Amp A The following specifications apply for IZ = 200µA and TJ = 25˚C, unless otherwise noted. 2.550 65 V mV −40˚C ≤ TJ ≤ 85˚C IZ (MIN) rz 150 0.2 200 µA 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 LM432 Dual Op Amp with On-Chip Fixed 2.5V Reference Physical Dimensions unless otherwise noted inches (millimeters) 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. 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