LM7301 Low Power, 4 MHz GBW, Rail-to-Rail Input-Output Operational Amplifier in TinyPak™ Package General Description Features The LM7301 provides high performance in a wide range of applications. The LM7301 offers greater than rail-to-rail input range, full rail-to-rail output swing, large capacitive load driving ability and low distortion. With only 0.6 mA supply current, the 4 MHz gain-bandwidth of this device supports new portable applications where higher power devices unacceptably drain battery life. The LM7301 can be driven by voltages that exceed both power supply rails, thus eliminating concerns over exceeding the common-mode voltage range. The rail-to-rail output swing capability provides the maximum possible dynamic range at the output. This is particularly important when operating on low supply voltages. Operating on supplies of 1.8V–32V, the LM7301 is excellent for a very wide range of applications in low power systems. Placing the amplifier right at the signal source reduces board size and simplifies signal routing. The LM7301 fits easily on low profile PCMCIA cards. at VS = 5V (Typ unless otherwise noted) n Tiny SOT23-5 package saves space n Greater than Rail-to-Rail Input CMVR −0.25V to 5.25V n Rail-to-Rail Output Swing 0.07V to 4.93V n Wide Gain-Bandwidth 4 MHz n Low Supply Current 0.60 mA n Wide Supply Range 1.8V to 32V n High PSRR 104 dB n High CMRR 93 dB n Excellent Gain 97 dB Applications n n n n n Portable instrumentation Signal conditioning amplifiers/ADC buffers Active filters Modems PCMCIA cards Connection Diagrams 8-Pin SO-8 5-Pin SOT23 DS012842-1 DS012842-2 Top View Top View Ordering Information Package 8-Pin SO-8 5-Pin SOT23 Ordering NSC Drawing Package Information Number Marking Supplied As LM7301IMX M08A LM7301IM LM7301IM M08A LM7301IM 2.5k Tape and Reel Rails LM7301IM5 MA05A A04A 1k Tape and Reel LM7301IM5X MA05A A04A 3k Tape and Reel TinyPak™ is a trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS012842 www.national.com LM7301 Low Power, 4 MHz GBW, Rail-to-Rail Input-Output Operational Amplifier in TinyPak Package August 1999 Absolute Maximum Ratings (Note 1) Lead Temperature (Soldering, 10 sec.) Storage Temperature Range Junction Temperature (Note 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Differential Input Voltage Voltage at Input/Output Pin Supply Voltage (V+ − V−) Current at Input Pin Current at Output Pin (Note 3) Current at Power Supply Pin 2500V 15V (V+) + 0.3V, (V−) −0.3V 35V ± 10 mA ± 20 mA 25 mA Operating Ratings Supply Voltage Junction Temperature Range Thermal Resistance (θJA) M5 Package, 5-Pin SOT23 M Package, 8-Pin Surface Mount 260˚C −65˚C to +150˚C 150˚C (Note 1) 1.8V ≤ VS ≤ 32V −40˚C ≤ TJ ≤ +85˚C 325˚C/W 165˚C/W 5.0V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5.0V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2. Boldface limits apply at the temperature extremes Typ Symbol Parameter Conditions (Note 5) LM7301 Limit Units (Note 6) VOS Input Offset Voltage TCVOS Input Offset Voltage Average Drift IB Input Bias Current 0.03 Input Offset Current mV max 2 VCM = 0V VCM = 5V IOS 6 8 VCM = 0V 90 −40 0.7 µV/˚C 200 nA 250 max −75 nA −85 min 70 nA max 80 VCM = 5V 0.7 55 65 RIN Input Resistance, CM 0V ≤ VCM ≤ 5V 39 CMRR Common Mode Rejection Ratio 0V ≤ VCM ≤ 5V 88 MΩ 70 67 dB min 0V ≤ VCM ≤ 3.5V 93 PSRR Power Supply Rejection Ratio 2.2V ≤ V+ ≤ 30V 104 VCM Input Common-Mode Voltage Range CMRR ≥ 65 dB 5.1 V −0.1 V 87 84 AV VO Large Signal Voltage Gain Output Swing RL = 10 kΩ VO = 4.0VPP RL = 10 kΩ 71 0.07 4.93 RL = 2 kΩ 0.14 4.87 ISC Output Short Circuit Current Sourcing Sinking www.national.com 2 11.0 9.5 14 V/mV 10 min 0.12 V 0.15 max 4.88 V 4.85 min 0.20 V 0.22 max 4.80 V 4.78 min 8.0 mA 5.5 min 6.0 mA 5.0 min 5.0V DC Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5.0V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2. Boldface limits apply at the temperature extremes Typ Symbol Parameter Conditions LM7301 (Note 5) Limit Units (Note 6) Supply Current IS 0.60 1.10 mA 1.24 max AC Electrical Characteristics TJ = 25˚C, V+ = 2.2V to 30V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2 Symbol Parameter Conditions Typ Units (Note 5) 1.25 V/µs 4 MHz Input-Referred Voltage Noise ± 4V Step @ VS ± 6V f = 100 kHz, RL = 10 kΩ f = 1 kHz in Input-Referred Current Noise f = 1 kHz 0.24 T.H.D. Total Harmonic Distortion f = 10 kHz 0.006 SR Slew Rate GBW Gain-Bandwidth Product en 36 % 2.2V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.2V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2. Boldface limits apply at the temperature extremes Typ Symbol Parameter Conditions (Note 5) LM7301 Limit Units (Note 6) VOS Input Offset Voltage TCVOS Input Offset Voltage Average Drift IB Input Bias Current 0.04 Input Offset Current mV max 2 VCM = 0V VCM = 2.2V IOS 6 8 VCM = 0V 89 −35 0.8 µV/˚C 200 nA 250 max −75 nA −85 min 70 nA max 80 VCM = 2.2V 0.4 55 65 RIN Input Resistance 0V ≤ VCM ≤ 2.2V 18 CMRR Common Mode Rejection Ratio 0V ≤ VCM ≤ 2.2V 82 MΩ 60 56 dB min PSRR Power Supply Rejection Ratio 2.2V ≤ V+ ≤ 30V 104 VCM Input Common-Mode Voltage Range CMRR > 60 dB 2.3 V −0.1 V 87 84 AV Large Signal Voltage Gain RL = 10 kΩ VO = 1.6VPP 3 46 6.5 V/mV 5.4 min www.national.com 2.2V DC Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.2V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2. Boldface limits apply at the temperature extremes Typ Symbol Parameter Conditions (Note 5) LM7301 Limit Units (Note 6) VO RL = 10 kΩ Output Swing 0.05 2.15 RL = 2 kΩ 0.09 2.10 ISC Output Short Circuit Current Sourcing Sinking IS Supply Current 10.9 7.7 0.57 0.08 V 0.10 max 2.10 V 2.00 min 0.13 V 0.14 max 2.07 V 2.00 min 8.0 mA 5.5 min 6.0 mA 5.0 min 0.97 mA 1.24 max 30V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 30V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2. Boldface limits apply at the temperature extremes Typ Symbol Parameter Conditions (Note 5) LM7301 Limit Units (Note 6) VOS Input Offset Voltage TCVOS Input Offset Voltage Average Drift IB Input Bias Current 0.04 Input Offset Current mV max 2 VCM = 0V VCM = 30V IOS 6 8 VCM = 0V VCM = 30V 103 −50 1.2 0.5 RIN Input Resistance 0V ≤ VCM ≤ 30V 200 CMRR Common Mode Rejection Ratio 0V ≤ VCM ≤ 30V 104 µV/˚C 300 nA 500 max −100 nA −200 min 90 nA 190 max 65 nA 135 max MΩ 80 78 0V ≤ VCM ≤ 27V 115 90 87 dB min 88 PSRR Power Supply Rejection Ratio 2.2V ≤ V+ ≤ 30V 104 VCM Input Common-Mode Voltage Range CMRR > 80 dB 30.1 V −0.1 V 84 AV www.national.com Large Signal Voltage Gain RL = 10 kΩ VO = 28VPP 4 105 30 V/mV 20 min 30V DC Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 30V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ to V+/2. Boldface limits apply at the temperature extremes Typ Symbol Parameter Conditions (Note 5) LM7301 Limit Units (Note 6) VO RL = 10 kΩ Output Swing 0.16 0.275 V max 0.375 29.8 29.75 V min 28.65 ISC Output Short Circuit Current Sourcing 11.7 (Note 4) Sinking 11.5 (Note 4) IS Supply Current 0.72 8.8 mA 6.5 min 8.2 mA 6.0 min 1.30 mA 1.35 max 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, 1.5 kΩ in series with 100 pF. 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 into a PC board. Note 5: Typical Values represent the most likely parametric norm. Note 6: All limits are guaranteed by testing or statistical analysis. Typical Performance Characteristics Supply Current vs Supply Voltage TA = 25˚C, RL = 1 MΩ unless otherwise specified VOS vs Supply Voltage VOS vs VCM VS = ± 1.1V DS012842-3 VOS vs VCM VS = ± 2.5V DS012842-4 VOS vs VCM VS = ± 15V DS012842-5 Inverting Input, Bias Current vs Common Mode Voltage VS = ± 1.1V DS012842-6 DS012842-7 DS012842-8 5 www.national.com Typical Performance Characteristics Non Inverting Input, Bias Current vs Common Mode Voltage VS = ± 1.1V TA = 25˚C, RL = 1 MΩ unless otherwise specified (Continued) Inverting Input, Bias Current vs Common Mode Voltage VS = ± 2.5V Non Inverting Input, Bias Current vs Common Mode Voltage VS = ± 2.5V DS012842-9 DS012842-10 DS012842-11 Non Inverting Input, Bias Current vs Common Mode Voltage VS = ± 15V Inverting Input, Bias Current vs Common Mode Voltage VS = ± 15V VO vs IO, VS = ± 1.1V DS012842-24 DS012842-12 DS012842-13 VO vs IO, VS = ± 2.5V Short Circuit Current vs Supply Voltage Voltage Noise vs Frequency DS012842-25 DS012842-26 www.national.com 6 DS012842-14 Typical Performance Characteristics Current Noise vs Frequency TA = 25˚C, RL = 1 MΩ unless otherwise specified (Continued) Gain and Phase, 2.7V Supply Gain and Phase DS012842-22 DS012842-23 DS012842-15 Applications Information GENERAL INFORMATION Low supply current and wide bandwidth, greater than rail-to-rail input range, full rail-to-rail output, good capacitive load driving ability, wide supply voltage and low distortion all make the LM7301 ideal for many diverse applications. The high common-mode rejection ratio and full rail-to-rail input range provides precision performance when operated in noninverting applications where the common-mode error is added directly to the other system errors. DS012842-17 FIGURE 2. CAPACITIVE LOAD DRIVING The LM7301 has the ability to drive large capacitive loads. For example, 1000 pF only reduces the phase margin to about 25 degrees. TRANSIENT RESPONSE The LM7301 offers a very clean, well-behaved transient response. Figures 1, 2, 3, 4, 5, 6 show the response when operated at gains of +1 and −1 when handling both small and large signals. The large phase margin, typically 70 to 80 degrees, assures clean and symmetrical response. In the large signal scope photos, Figure 1 and Figure 4, the input signal is set to 4.8V. Note that the output goes to within 100 mV of the supplies cleanly and without overshoot. In the small signal samples, the response is clean, with only slight overshoot when used as a follower. Figure 3 and Figure 6 are the circuits used to make these photos. DS012842-18 FIGURE 3. DS012842-19 FIGURE 4. DS012842-16 FIGURE 1. 7 www.national.com Applications Information SPECIFIC ADVANTAGES OF SOT23-5 (TinyPak) The obvious advantage of the SOT23-5, TinyPak, is that it can save board space, a critical aspect of any portable or miniaturized system design. The need to decrease overall system size is inherent in any handheld, portable, or lightweight system application. (Continued) Furthermore, the low profile can help in height limited designs, such as consumer hand-held remote controls, sub-notebook computers, and PCMCIA cards. An additional advantage of the tiny package is that it allows better system performance due to ease of package placement. Because the tiny package is so small, it can fit on the board right where the opamp needs to be placed for optimal performance, unconstrained by the usual space limitations. This optimal placement of the tiny package allows for many system enhancements, not easily achieved with the constraints of a larger package. For example, problems such as system noise due to undesired pickup of digital signals can be easily reduced or mitigated. This pick-up problem is often caused by long wires in the board layout going to or from an opamp. By placing the tiny package closer to the signal source and allowing the LM7301 output to drive the long wire, the signal becomes less sensitive to such pick-up. An overall reduction of system noise results. Often times system designers try to save space by using dual or quad opamps in their board layouts. This causes a complicated board layout due to the requirement of routing several signals to and from the same place on the board. Using the tiny opamp eliminates this problem. Additional space savings parts are available in tiny packages from National Semiconductor, including low power amplifiers, precision voltage references, and voltage regulators. DS012842-20 FIGURE 5. DS012842-21 FIGURE 6. POWER DISSIPATION Although the LM7301 has internal output current limiting, shorting the output to ground when operating on a +30V power supply will cause the opamp to dissipate about 350 mW. This is a worst-case example. In the SO-8 package, this will cause a temperature rise of 58˚C. In the SOT23-5 package, the higher thermal resistance will cause a calculated rise of 113˚C. This can raise the junction temperature to above the absolute maximum temperature of 150˚C. Operating from split supplies greatly reduces the power dissipated when the output is shorted. Operating on ± 15V supplies can only cause a temperature rise of 29˚C in the SO-8 and 57˚C in the SOT23-5 package, assuming the short is to ground. LOW DISTORTION, HIGH OUTPUT DRIVE CAPABILITY The LM7301 offers superior low-distortion performance, with a total-harmonic-distortion-plus-noise of 0.06% at f = 10 kHz. The advantage offered by the LM7301 is its low distortion levels, even at high output current and low load resistance. Typical Applications SPICE Macromodel A SPICE macromodel for this and many other National Semiconductor operational amplifiers is available, at no charge, from the NSC Customer Support Center at 800-272-9959 or on the World Wide Web at http:// www.national.com/models. HANDHELD REMOTE CONTROLS The LM7301 offers outstanding specifications for applications requiring good speed/power trade-off. In applications such as remote control operation, where high bandwidth and low power consumption are needed. The LM7301 performance can easily meet these requirements. WIDE SUPPLY RANGE The high power-supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) provide precision performance when operated on battery or other unregulated supplies. This advantage is further enhanced by the very wide supply range (2.2V–30V, guaranteed) offered by the LM7301. In situations where highly variable or unregulated supplies are present, the excellent PSRR and wide supply range of the LM7301 benefit the system designer with continued precision performance, even in such adverse supply conditions. www.national.com OPTICAL LINE ISOLATION FOR MODEMS The combination of the low distortion and good load driving capabilities of the LM7301 make it an excellent choice for driving opto-coupler circuits to achieve line isolation for modems. This technique prevents telephone line noise from coupling onto the modem signal. Superior isolation is achieved by coupling the signal optically from the computer modem to the telephone lines; however, this also requires a low distortion at relatively high currents. Due to its low distortion at high output drive currents, the LM7301 fulfills this need, in this and in other telecom applications. 8 Typical Applications reduce the nose is to lower the signal impedance, which reduces the noise pickup. In this configuration, the amplifier usually requires 30 db–40 db of gain, at bandwidths higher than most low-power CMOS parts can achieve. The LM7301 offers the tiny package, higher bandwidths, and greater output drive capability than other rail-to-rail input/output parts can provide for this application. (Continued) REMOTE MICROPHONE IN PERSONAL COMPUTERS Remote microphones in Personal Computers often utilize a microphone at the top of the monitor which must drive a long cable in a high noise environment. One method often used to 9 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT-23 Package Order Number LM7301IM5X or LM7301IM5 NS Package Number MA05A www.national.com 10 inches (millimeters) unless otherwise noted (Continued) 8-Pin Small Outline Package Order Number LM7301IMX 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 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. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 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. LM7301 Low Power, 4 MHz GBW, Rail-to-Rail Input-Output Operational Amplifier in TinyPak Package Physical Dimensions