LM321 www.ti.com SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 LM321 Low Power Single Op Amp Check for Samples: LM321 FEATURES DESCRIPTION • The LM321 brings performance and economy to low power systems. With a high unity gain frequency and a specified 0.4V/µs slew rate, the quiescent current is only 430µA/amplifier (5V). The input common mode range includes ground and therefore the device is able to operate in single supply applications as well as in dual supply applications. It is also capable of comfortably driving large capacitive loads. 1 2 • • • • • • (VCC = 5V, TA = 25°C. Typical values unless specified.) Gain-Bandwidth Product 1MHz Low Supply Current 430µA Low Input Bias Current 45nA Wide Supply Voltage Range +3V to +32V Stable With High Capacitive Loads Single Version of LM324 APPLICATIONS • • • • • Chargers Power Supplies Industrial: Controls, Instruments Desktops Communications Infrastructure Connection Diagram SOT-23 The LM321 is available in the SOT-23 package. Overall the LM321 is a low power, wide supply range performance op amp that can be designed into a wide range of applications at an economical price without sacrificing valuable board space. Application Circuit DC Summing Amplifier (VIN's ≥ 0 VDC and VO ≥ VDC) Top View Where: V0 = V1 + V2 - V3 - V4, (V1+V2) ≥ (V3 + V4) to keep VO > 0 VDC 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2001–2013, Texas Instruments Incorporated LM321 SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) Differential Input Voltage Input Current (VIN < −0.3V) ±Supply Voltage (2) 50mA Supply Voltage (V+ - V−) 32V −0.3V to +32V Input Voltage Output Short Circuit to GND, V+ ≤ 15V and TA = 25°C (3) Continuous Storage Temperature Range −65°C to 150°C Junction Temperature (4) 150°C Mounting Temperature Lead Temp (Soldering, 10 sec) 260°C Infrared (10 sec) 215°C Thermal Resistance to Ambient (θJA) ESD Tolerance (1) (2) (3) (4) (5) 265°C/W (5) 300V Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test conditions, see the Electrical Characteristics. This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector base junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on the IC chip. This transistor action can cause the output voltages of the op amps to go to the V+ voltage level (or to ground for a large overdrive) for the time duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value greater than −0.36V (at 25°C). Short circuits from the output V+ can cause excessive heating and eventual destruction. When considering short circuits to ground the maximum output current is approximately 40mA independent of the magnitude of V+. At values of supply voltage in excess of +15V, continuous short circuits can exceed the power dissipation ratings and cause eventual destruction. The maximum power dissipation is a function of TJ(MAX), θJA , and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/ θJA. All numbers apply for packages soldered directly onto a PC board. Human Body Model, 1.5kΩ in series with 100pF. Operating Ratings (1) −40°C to 85°C Temperature Range Supply Voltage (1) 2 3V to 30V Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not ensured. For ensured specifications and the test conditions, see the Electrical Characteristics. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 LM321 www.ti.com SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 Electrical Characteristics Unless otherwise specified, all limits specified for at TA = 25°C; V+ = 5V, V− = 0V, VO = 1.4V. Boldface limits apply at temperature extremes. Symbol Parameter Conditions Min (1) (3) Typ Max Units 2 7 9 mV 5 50 150 nA 45 250 500 nA V+ - 1.5 V+ -2 V (2) (1) VOS Input Offset Voltage IOS Input Offset Current IB Input Bias Current VCM Input Common-Mode Voltage Range V+ = 30V (5) For CMRR > = 50dB 0 AV Large Signal Voltage Gain (V+ = 15V, RL = 2kΩ VO = 1.4V to 11.4V) 25 15 100 V/mV PSRR Power Supply Rejection Ratio RS ≤ 10kΩ, V+ ≤ 5V to 30V 65 100 dB CMRR Common Mode Rejection Ratio RS ≤ 10kΩ 65 85 dB VO Output Swing V+ = 30V, RL = 2kΩ 26 V+ = 30V, RL = 10kΩ 27 (4) VOH VOL IS Supply Current, No Load V+ = 5V, RL = 10kΩ V 28 5 20 mV V+ = 5V 0.430 0.7 1.15 1.2 mA V+ = 30V 0.660 1.5 2.85 3 ISOURCE Output Current Sourcing VID = +1V, V+ = 15V, VO = 2V 20 10 40 20 ISINK Output Current Sinking VID = −1V V+ = 15V, VO = 2V 10 5 20 8 mA VID = −1V V+ = 15V, VO = 0.2V 12 100 µA + mA IO Output Short Circuit to Ground V = 15V 40 SR Slew Rate V+ = 15V, RL = 2kΩ, VIN = 0.5 to 3V CL = 100pF, Unity Gain 0.4 V/µs V+ = 30V, f = 100kHz, VIN = 10mV, RL =2kΩ, CL = 100pF 1 MHz 60 deg 0.015 % (6) GBW Gain Bandwidth Product φm Phase Margin THD Total Harmonic Distortion en (1) (2) (3) (4) (5) (6) Equivalent Input Noise Voltage f = 1kHz, AV = 20dB RL = 2kΩ, VO = 2VPP, CL = 100pF, V+ = 30V f = 1kHz, RS = 100Ω V+ = 30V 40 85 mA nV/ All limits are specified by testing or statistical analysis. Typical values represent the most likely parametric norm. VO ≅ 1.4V, RS = 0Ω with V+ from 5V to 30V; and over the full input common-mode range (0V to V+ - 1.5V) at 25°C. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output so no loading change exists on the input lines. The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V (at 25°C). The upper end of the common-mode voltage range is V+ - 1.5V at 25°C, but either or both inputs can go to +32V without damage, independent of the magnitude of V+. Short circuits from the output V+ can cause excessive heating and eventual destruction. When considering short circuits to ground the maximum output current is approximately 40mA independent of the magnitude of V+. At values of supply voltage in excess of +15V, continuous short circuits can exceed the power dissipation ratings and cause eventual destruction. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 3 LM321 SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 www.ti.com Simplified Schematic 4 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 LM321 www.ti.com SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 Typical Performance Characteristics Unless otherwise specified, VS = +5V, single supply, TA = 25°C. Small Signal Pulse Response Large Signal Pulse Response Supply Current vs. Supply Voltage Sinking Current vs. Output Voltage Source Current vs. Output Voltage Open Loop Frequency Response Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 5 LM321 SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 www.ti.com APPLICATION HINTS The LM321 op amp can operate with a single or dual power supply voltage, has true-differential inputs, and remain in the linear mode with an input common-mode voltage of 0 VDC. This amplifier operates over a wide range of power supply voltages, with little change in performance characteristics. At 25°C amplifier operation is possible down to a minimum supply voltage of 3V. Large differential input voltages can be easily accommodated and, as input differential voltage protection diodes are not needed, no large input currents result from large differential input voltages. The differential input voltage may be larger than V+ without damaging the device. Protection should be provided to prevent the input voltages from going negative more than −0.3 VDC (at 25°C).An input clamp diode with a resistor to the IC input terminal can be used. To reduce the power supply drain, the amplifier has a class A output stage for small signal levels which converts to class B in a large signal mode. This allows the amplifiers to both source and sink large output currents. Therefore both NPN and PNP external current boost transistors can be used to extend the power capability of the basic amplifiers. The output voltage needs to raise approximately 1 diode drop above ground to bias the onchip vertical PNP transistor for output current sinking applications. For AC applications, where the load is capacitively coupled to the output of the amplifier, a resistor should be used, from the output of the amplifier to ground to increase the class A bias current and to reduce distortion. Capacitive loads which are applied directly to the output of the amplifier reduce the loop stability margin. Values of 50pF can be accommodated using the worst-case non-inverting unity gain connection. Large closed loop gains or resistive isolation should be used if large load capacitance must be driven by the amplifier. The bias network of the LM321 establishes a supply current which is independent of the magnitude of the power supply voltage over the range of from 3 VDC to 30 VDC. Output short circuits either to ground or to the positive power supply should be of short time duration. Units can be destroyed, not as a result of the short circuit current causing metal fusing, but rather due to the large increase in IC chip dissipation which will cause eventual failure due to excessive junction temperatures. The larger value of output source current which is available at 25°C provides a larger output current capability at elevated temperatures than a standard IC op amp. The circuits presented in the section on typical applications emphasize operation on only a single power supply voltage. If complementary power supplies are available, all of the standard op amp circuits can be used. In general, introducing a pseudo-ground (a bias voltage reference of V+/2) will allow operation above and below this value in single power supply systems. Many application circuits are shown which take advantage of the wide input common-mode voltage range which includes ground. In most cases, input biasing is not required and input voltages which range to ground can easily be accommodated. 6 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 LM321 www.ti.com SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 TYPICAL APPLICATIONS Non-Inverting DC Gain (0V Input = 0V Output) DC Summing Amplifier (V) (IN's ≥ 0 VDC and VO ≥ VDC) Amplitude Modulator Circuit Where: V0 = V1 + V2 - V3 - V4, (V1+V2) ≥ (V3 + V4) to keep VO > 0 VDC Power Amplifier LED Driver V0 = 0 VDC for VIN = 0 VDC, AV = 10 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 7 LM321 SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 www.ti.com Fixed Current Sources 8 Lamp Driver Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 LM321 www.ti.com SNOS935B – FEBRUARY 2001 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision A (March 2013) to Revision B • Page Changed layout of National Data Sheet to TI format ............................................................................................................ 8 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM321 9 PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) (4) LM321MF ACTIVE SOT-23 DBV 5 1000 TBD Call TI Call TI -40 to 85 A63A LM321MF/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 A63A LM321MFX ACTIVE SOT-23 DBV 5 3000 TBD Call TI Call TI -40 to 85 A63A LM321MFX/NOPB ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 A63A (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. 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Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LM321MF SOT-23 DBV 5 1000 178.0 8.4 LM321MF/NOPB SOT-23 DBV 5 1000 178.0 LM321MFX SOT-23 DBV 5 3000 178.0 LM321MFX/NOPB SOT-23 DBV 5 3000 178.0 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 Pack Materials-Page 1 W Pin1 (mm) Quadrant PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM321MF SOT-23 DBV 5 1000 210.0 185.0 35.0 LM321MF/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM321MFX SOT-23 DBV 5 3000 210.0 185.0 35.0 LM321MFX/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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