LMV116/LMV118 Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option General Description Features The LMV116 (single) rail-to-rail output voltage feedback amplifiers offer high speed (45MHz), and low voltage operation (2.7V) in addition to micro-power shutdown capability (LMV118). Output voltage range extends to within 20mV of either supply rail, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 600µA, output current capability is kept at a respectable ± 20mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture. For portable applications, the LMV118 provides shutdown capability while keeping the turn-off current to l5µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT23-5 & SOT23-6) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium. (VS = 2.7V, TA = 25˚C, RL = 1kΩ to V+/2, AV = +1. Typical values unless specified). n −3dB BW 45MHz n Supply voltage range 2.7V to 12V n Slew rate 40V/µs n Supply current 600µA n Power down supply current 15µA n Output short circuit current 32mA ± 20mA n Linear output current n Input common mode voltage −0.3V to 1.7V n Output voltage swing 20mV from rails n Input voltage noise 40nV/ n Input current noise 0.75pA/ Applications n n n n n n High speed clock buffer/driver Active filters High speed portable devices Multiplexing applications (LMV118) Current sense amplifier High speed transducer amplifier Typical Application 20080704 Non-Inverting Clock Buffer Amplifier © 2003 National Semiconductor Corporation DS200807 www.national.com LMV116/LMV118 Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option October 2003 LMV116/LMV118 Absolute Maximum Ratings Soldering Information (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Infrared or Convection (20 sec) 235˚C Wave Soldering Lead Temp. (10 sec) 260˚C ESD Tolerance Human Body 2KV (Note 2) Machine Model Operating Ratings (Note 1) 200V (Note 9) Supply Voltage (V+ – V−) ± 2.5V VIN Differential Output Short Circuit Duration Temperature Range (Note 4) (Note 3), (Note 11) Supply Voltage (V+ - V−) − Voltage at Input/Output pins V +0.8V, V −0.8V Storage Temperature Range −65˚C to +150˚C Junction Temperature (Note 4) −40˚C to +85˚C Package Thermal Resistance (Note 4) (θJA) 12.6V + 2.5V to 12V SOT23-5 265˚C/W SOT23-6 265˚C/W +150˚C 2.7V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2, and RF = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) Max (Note 6) Units ±5 ±6 mV VOS Input Offset Voltage 0V ≤ VCM ≤ 1.7V ±1 TC VOS Input Offset Average Drift (Note 12) ±5 µV/C IB Input Bias Current (Note 7) −2.0 −2.2 −0.40 µA IOS Input Offset Current CMRR Common Mode Rejection Ratio VCM Stepped from 0V to 1.55V 73 88 1 dB PSRR Power Supply Rejection Ratio V+ = 2.7V to 3.7V or V− = 0V to −1V 72 85 dB RIN Common Mode Input Resistance 3 MΩ CIN Common Mode Input Capacitance 2 pF CMVR Input Common-Mode Voltage Range CMRR ≥ 50dB AVOL Large Signal Voltage Gain VO = 0.35V to 2.35V VO Output Swing High RL = 1kΩ to V+/2 −0.3 −0.1 Output Swing Low 87 2.55 2.66 Output Short Circuit Current V dB V 2.68 RL = 1kΩ to V+/2 150 RL = 10kΩ to V+/2 ISC nA 1.7 73 70 RL = 10kΩ to V+/2 500 40 mV 20 Sourcing to V− VID = 200mV (Note 10) 25 35 Sinking to V+ VID = −200mV (Note 10) 25 32 mA IOUT Output Current VOUT = 0.5V from rails ± 20 IS Supply Current Normal Operation 600 900 Shut-down Mode (LMV118) 15 50 mA µA SR Slew Rate (Note 8) AV = +1, VO = 1VPP 40 V/µs BW −3dB BW AV = +1, VOUT = 200mVPP 45 MHz en Input -Referred Voltage Noise f = 100kHz 40 f = 1kHz 60 www.national.com 2 nV/ (Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2, and RF = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Input-Referred Current Noise in Conditions Min (Note 6) Typ (Note 5) f = 100kHz 0.75 f = 1kHz 1.20 ton Turn-on Time (LMV118) toff Turn-off Time (LMV118) THSD Shut-down Threshold (LMV118) IS ≤ 50µA 1.95 ISD Shutdown Pin Input Current (LMV118) (Note 7) −20 Max (Note 6) Units pA/ 250 ns 560 ns 2.3 V µA 5V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and RF = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) Max (Note 6) Units ±5 ±6 mV VOS Input Offset Voltage 0V ≤ VCM ≤1.7V ±1 TC VOS Input Offset Average Drift (Note 12) ±5 µV/C IB Input Bias Current (Note 7) −2.0 −2.2 −0.40 µA IOS Input Offset Current CMRR Common Mode Rejection Ratio VCM Stepped from 0V to 3.8V 77 85 1 PSRR Power Supply Rejection Ratio V+ = 5V to 6V or V− = 0V to −1V 72 95 dB RIN Common Mode Input Resistance 3 MΩ CIN Common Mode Input Capacitance 2 pF CMVR Input Common-Mode Voltage Range CMRR ≥ 50dB AVOL Large Signal Voltage Gain VO = 1.5V to 3.5V 73 70 85 VO Output Swing High RL = 1kΩ to V+/2 4.80 4.95 −0.3 −0.1 RL = 10kΩ to V+/2 Output Swing Low Output Short Circuit Current nA dB 4.0 V dB V 4.98 RL = 1kΩ to V+/2 200 RL = 10kΩ to V+/2 ISC 500 50 mV 20 Sourcing to V− VID = 200mV (Note 10) 35 45 Sinking to V+ VID = −200mV (Note 10) 35 43 mA IOUT Output Current VOUT = 0.5V from rails ± 20 IS Supply Current Normal Operation 600 900 Shut-down Mode (LMV118) 10 50 mA µA SR Slew Rate (Note 8) AV = +1, VO = 1VPP 40 V/µs BW −3dB BW AV = +1, VOUT = 200mVPP 45 MHz en Input -Referred Voltage Noise f = 100kHz 40 f = 1kHz 60 in Input-Referred Current Noise f = 100kHz 0.75 f = 1kHz 1.20 3 nV/ pA/ www.national.com LMV116/LMV118 2.7V Electrical Characteristics LMV116/LMV118 5V Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and RF = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) ton Turn-on Time (LMV118) 210 toff Turn-off Time (LMV118) 500 THSD Shut-down Threshold (LMV118) IS ≤ 50µA 4.25 ISD Shutdown Pin Input Current (LMV118) (Note 7) −20 Max (Note 6) Units ns ns 4.60 V µA ± 5V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = −5V, VCM = VO = 0V, and RF = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions VOS Input Offset Voltage −5V ≤ VCM ≤ 1.7V TC VOS Input Offset Average Drift (Note 12) IB Input Bias Current (Note 7) Min (Note 6) Typ (Note 5) Max (Note 6) Units ±1 ±5 ±6 mV ±5 µV/C −2.0 −2.2 −0.40 µA IOS Input Offset Current CMRR Common Mode Rejection Ratio VCM Stepped from −5V to 3.5V 78 104 3 PSRR Power Supply Rejection Ratio V+ = 5V to 6V or V− = −5V to −6V 72 95 dB RIN Common Mode Input Resistance 3 MΩ CIN Common Mode Input Capacitance 2 pF CMVR Input Common-Mode Voltage Range CMRR ≥ 50dB AVOL Large Signal Voltage Gain VO = −2V to 2V VO Output Swing High RL = 1kΩ −5.3 −5.1 74 71 4.70 RL = 10kΩ Output Swing Low Output Short Circuit Current nA dB 4.0 V 85 dB 4.92 V 4.97 RL = 1kΩ −4.70 RL = 10kΩ ISC 500 −4.93 mV −4.98 Sourcing to 0V VID = 200mV (Note 10) 40 57 Sinking to 0V VID = −200mV (Note 10) 40 54 mA IOUT Output Current VOUT = 0.5V from rails ± 20 IS Supply Current Normal Operation 600 900 Shut-down Mode (LMV118) 15 50 AV = +1, VO = 1VPP 35 V/µs MHz SR Slew Rate (Note 8) BW −3dB BW AV = +1, VOUT = 200mVPP 45 en Input -Referred Voltage Noise f = 100kHz 40 f = 1kHz 60 in Input-Referred Current Noise f = 100kHz 0.75 f = 1kHz 1.20 mA µA nV/ pA/ ton Turn-on Time (LMV118) 200 ns toff Turn-off Time (LMV118) 700 ns www.national.com 4 (Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = −5V, VCM = VO = 0V, and RF = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) Max (Note 6) Units 4.60 V THSD Shut-down Threshold (LMV118) IS ≤ 50µA 4.25 ISD Shutdown Pin Input Current (LMV118) (Note 7) −20 µA Note 1: 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 guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Note 2: Human body model, 1.5kΩ in series with 100pF. Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150˚C. Note 4: 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. Note 5: Typical values represent the most likely parametric norm. Note 6: All limits are guaranteed by testing or statistical analysis. Note 7: Positive current corresponds to current flowing into the device. Note 8: Slew rate is the average of the rising and falling slew rates. Note 9: Machine Model, 0Ω in series with 200pF. Note 10: Short circuit test is a momentary test. See Note 11. Note 11: Output short circuit duration is infinite for VS < 6V at room temperature and below. For VS > 6V, allowable short circuit duration is 1.5ms. Note 12: Offset voltage average drift determined by dividing the change in VOS at temperature extremes into the total temperature change. Note 13: Guaranteed based on characterization only. Connection Diagrams SOT23-5 (LMV116) SOT23-6 (LMV118) 20080760 20080759 Top View Top View Ordering Information Package 5-Pin SOT-23 6-Pin SOT-23 Part Number LMV116MF LMV116MFX LMV118MF LMV118MFX Package Marking Transport Media 1k Units Tape and Reel AC1A 3k Units Tape and Reel 1k Units Tape and Reel AD1A 3k Units Tape and Reel 5 NSC Drawing MF05A MF06A www.national.com LMV116/LMV118 ± 5V Electrical Characteristics LMV116/LMV118 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. Supply Current vs. Supply Voltage Supply Current vs. VCM 20080701 20080703 Gain and Phase vs. Frequency CMRR vs. Frequency 20080720 20080719 PSRR vs. Frequency Input Voltage Noise vs. Frequency 20080718 20080713 www.national.com 6 (Continued) Closed Loop Frequency Response for Various Temperature Input Current Noise vs. Frequency 20080716 20080717 Frequency Response for Various (AV) Large Signal Step Response 20080714 20080715 Offset Voltage vs. Common Mode Voltage (A Typical Unit) Offset Voltage vs. Common Mode Voltage (A Typical Unit) 20080705 20080706 7 www.national.com LMV116/LMV118 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. LMV116/LMV118 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. Offset Voltage vs. Common Mode Range (A Typical Unit) (Continued) Input Bias Current vs. Supply Voltage 20080702 20080707 Input Bias Current vs. VCM Sink Current vs. VOUT 20080708 20080710 Sink Current vs. VOUT Souce Current vs. VOUT 20080712 20080709 www.national.com 8 (Continued) Souce Current vs. VOUT 20080711 Application Notes CIRCUIT DESCRIPTION The LMV116 and LMV118 are based on National Semiconductor’s proprietary VIP10 dielectrically isolated bipolar process. The LMV116 and LMV118 architecture features the following: • Complimentary bipolar devices with exceptionally high ft (∼8GHz) even under low supply voltage (2.7V) and low Collector bias current. • Common Emitter push-pull output stage capable of 20mA output current (at 0.5V from the supply rails) while consuming only 600µA of total supply current. This architecture allows output to reach within milli-volts of either supply rail at light loads. • Consistent performance from any supply voltage (2.7V10V) with little variation with supply voltage for the most important specifications (e.g. BW, SR, IOUT, etc.) 20080756 FIGURE 1. LMV118 Equivalent Input in Shutdown Mode As can be seen above, in shutdown, there may be current flow through the internal diodes shown, caused by input potential, if present. This current may flow through the external feedback resistor and result in an apparent output signal. In most shutdown applications the presence of this output is inconsequential. However, if the output is “forced” by another device such as in a multiplexer, the other device will need to conduct the current described in order to maintain the output potential. To keep the output at or near ground during shutdown when there is no other device to hold the output low, a switch (transistor) could be used to shunt the output to ground. Figure 2 shows a circuit where a NPN bipolar is used to keep the output near ground (∼80mV): MICRO-POWER SHUTDOWN The LMV118 can be shutdown to save power and reduce its supply current to less than 50µA guaranteed, by applying a voltage to the SD pin. The SD pin is “active high” and needs to be tied to V− for normal operation. This input is low current ( < 20µA, 4pF equivalent capacitance) and a resistor to V− (≤20kΩ) will result in normal operation. Shutdown is guaranteed when SD pin is 0.4V or less from V+ at any operating supply voltage and temperature. In the shutdown mode, essentially all internal device biasing is turned off in order to minimize supply current flow and the output goes into Hi-Z (high impedance) mode. Complete device Turn-on and Turn-off times vary considerably relative to the output loading conditions, output voltage, and input impedance, but is generally limited to less than 1µs (see tables for actual data). During shutdown, the input stage has an equivalent circuit as shown below in Figure 1 9 www.national.com LMV116/LMV118 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. LMV116/LMV118 Application Notes (Continued) 20080764 FIGURE 2. Active Pull-Down Schematic Figure 3 shows the output waveform. 20080758 FIGURE 4. 2:1 MUX Operating off a 2.7V Single Supply Figure 5 shows the MUX output when selecting between a 1MHz sine and a 250kHz triangular waveform. 20080736 FIGURE 3. Output Held Low by Active Pull-Down Circuit If bipolar transistor power dissipation is not tolerable, the switch could be by a N-channel enhancement mode MOSFET. 2.7V SINGLE SUPPLY 2:1 MUX The schematic show in Figure 4 will function as a 2:1 MUX operating on a single 2.7V power supply, by utilizing the shutdown feature of the LMV118. 20080735 FIGURE 5. 2:1 MUX Output As can be seen in Figure 5, the output is well behaved and there are no spikes or glitches due to the switching. Switching times are approximately around 500ns based on the time when the output is considered “valid”. www.national.com 10 keeping the resistor values lower, will diminish this interaction. On the other hand, choosing very low value resistors could load down nodes and will contribute to higher overall power dissipation. (Continued) PRINTED CIRCUIT BOARD LAYOUT, COMPONENT VALUES SELECTION, AND EVALUATION BOARDS Generally, a good high-frequency layout will keep power supply and ground traces away from the inverting input and output pins. Parasitic capacitances on these nodes to ground will cause frequency response peaking and possible circuit oscillations (see Application Note OA-15 for more information). National Semiconductor suggests the following evaluation boards as a guide for high frequency layout and as an aid in device testing and characterization: Another important parameter, is the component values selection. Choosing large valued external resistors, will effect the closed loop behavior of the stage because of the interaction of these resistors with parasitic capacitances. These capacitors could be inherent to the device or a by-product of the board layout and component placement. Either way, Device Package Evaluation Board PN LMV116 SOT23-5 CLC730068 LMV118 SOT23-6 CLC730116 These free evaluation boards are shipped when a device sample request is placed with National Semiconductor. 11 www.national.com LMV116/LMV118 Application Notes LMV116/LMV118 Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT23 NS Package Number MF05A 6-Pin SOT23 NS Package Number MF06A www.national.com 12 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. National Semiconductor Americas Customer Support Center Email: [email protected] Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: [email protected] National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: [email protected] Tel: 81-3-5639-7560 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. LMV116/LMV118 Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option Notes