LM7332

LM7332 Dual Rail-to-Rail Input/Output, 30V, Wide Voltage, Range High Output Operational Amplifier April 16, 2008 LM7332 Dual Rail-to-Rail Input/Output 30V, Wide Voltage Range, High Output Operational Amplifier General Description The LM7332 is a dual rail-to-rail input and output amplifier with a wide operating temperature range (−40°C to +125°C) which meets the needs of automotive, industrial and power supply applications. The LM7332 has the output current of 100 mA which is higher than that of most monolithic op amps. Circuit designs with high output current requirements often need to use discrete transistors because many op amps have low current output. The LM7332 has enough current output to drive many loads directly, saving the cost and space of the discrete transistors. The exceptionally wide operating supply voltage range of 2.5V to 32V alleviates any concerns over functionality under extreme conditions and offers flexibility of use in a multitude of applications. Most of this device's parameters are insensitive to power supply variations; this design enhancement is another step in simplifying usage. Greater than rail-to-rail input common mode voltage range allows operation in many applications, including high side and low side sensing, without exceeding the input range. The LM7332 can drive unlimited capacitive loads without oscillations. The LM7332 is offered in the 8-pin MSOP and SOIC packages. Features (VS = ±15V, TA = 25°C, typical values unless specified.) 2.5V to 32V ■ Wide supply voltage range 0.3V beyond rails ■ Wide input common mode voltage >100 mA ■ Output short circuit current ±70 mA ■ High output current (1V from rails) 21 MHz ■ GBWP 15.2 V/µs ■ Slew rate Unlimited ■ Capacitive load tolerance 2.0 mA ■ Total supply current −40°C to +125°C ■ Temperature range ■ Tested at −40°C, +125°C, and 25°C at 5V, ±5V, ±15V Applications ■ ■ ■ ■ ■ ■ ■ ■ MOSFET and power transistor driver Replaces discrete transistors in high current output circuits Instrumentation 4-20 mA current loops Analog data transmission Multiple voltage power supplies and battery chargers High and low side current sensing Bridge and sensor driving Digital to analog converter output Key Graphs Output Swing vs. Sourcing Current Large Signal Step Response for Various Capacitive Loads 20187534 20187518 © 2008 National Semiconductor Corporation 201875 www.national.com LM7332 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model Machine Model VIN Differential Output Short Circuit Duration Supply Voltage (VS = V+ - V−) Voltage at Input/Output pins Storage Temperature Range 2 kV 200V ±10V (Notes 3, 9) 35V V+ +0.3V, V− −0.3V −65°C to +150°C Junction Temperature (Note 4) Soldering Information: +150°C 235°C 260°C  Infrared or Convection (20 sec.)  Wave Soldering (10 sec.) Operating Ratings Supply Voltage (VS = V+ - V−) Temperature Range(Note 4) Package Thermal Resistance, θJA, (Note 4) 2.5V to 32V −40°C to +125°C 235°C/W 165°C/W  8-Pin MSOP  8-Pin SOIC 5V Electrical Characteristics (Note 5) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = 5V, V− = 0V, VCM = 0.5V, VO = 2.5V, and RL > 1 MΩ to 2.5V. Boldface limits apply at the temperature extremes. Symbol VOS TC VOS IB IOS CMRR Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Bias Current Input Offset Current Common Mode Rejection Ratio 0V ≤ VCM ≤ 3V 0V ≤ VCM ≤ 5V PSRR CMVR Power Supply Rejection Ratio Input Common Mode Voltage Range 5V ≤ V+ ≤ 30V CMRR > 50 dB 5.1 5.0 AVOL VO Large Signal Voltage Gain Output Swing High 0.5V ≤ VO ≤ 4.5V RL = 10 kΩ to 2.5V RL = 10 kΩ to 2.5V VID = 100 mV RL = 2 kΩ to 2.5V VID = 100 mV Output Swing Low RL = 10 kΩ to 2.5V VID = −100 mV RL = 2 kΩ to 2.5V VID = −100 mV ISC Output Short Circuit Current Sourcing from V+, VID = 200 mV (Note 9) Sinking to V−, VID = −200 mV (Note 9) IOUT Output Current VID = ±200 mV, VO = 1V from rails 60 60 70 65 67 65 62 60 78 74 Condition VCM = 0.5V and VCM = 4.5V VCM = 0.5V and VCM = 4.5V (Note 10) (Note 11) −2.0 −2.5 Min (Note 7) −4 –5 Typ (Note 6) ±1.6 ±2 ±1.0 20 80 70 100 −0.3 5.3 77 60 100 5 20 90 90 ±55 mA 150 200 300 350 150 200 300 350 −0.1 0.0 dB +2.0 +2.5 250 300 Max (Note 7) +4 +5 Units mV µV/°C µA nA dB V dB mV from either rail mA www.national.com 2 LM7332 Symbol IS SR fu GBWP en in THD+N CT Rej. Parameter Total Supply Current Slew Rate (Note 8) Unity Gain Frequency Gain Bandwidth Product Input Referred Voltage Noise Input Referred Current Noise Total Harmonic Distortion +Noise Crosstalk Rejection Condition No Load, VCM = 0.5V AV = +1, VI = 5V Step, RL = 1 MΩ, CL = 10 pF RL = 10 MΩ, CL = 20 pF f = 50 kHz f = 2 kHz f = 2 kHz AV = +2, RL = 100 kΩ, f = 1 kHz, VO = 4 VPP f = 3 MHz, Driver RL = 10 kΩ Min (Note 7) Typ (Note 6) 1.5 12 7.5 19.3 14.8 1.35 −84 68 Max (Note 7) 2.3 2.6 Units mA V/µs MHz MHz nV/ pA/ dB dB ±5V Electrical Characteristics Symbol VOS TC VOS IB IOS CMRR Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Bias Current Input Offset Current (Note 5) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = +5V, V− = −5V, VCM = 0V, VO = 0V, and RL > 1 MΩ to 0V. Boldface limits apply at the temperature extremes. Condition VCM = −4.5V and VCM = 4.5V VCM = −4.5V and VCM = 4.5V (Note 10) (Note 11) −2.0 −2.5 Min (Note 7) −4 −5 Typ (Note 6) ±1.6 ±2 ±1.0 20 74 75 70 65 78 74 88 74 100 −5.3 5.1 5.0 AVOL VO Large Signal Voltage Gain Output Swing High −4V ≤ VO ≤ 4V RL = 10 kΩ to 0V RL = 10 kΩ to 0V VID = 100 mV RL = 2 kΩ to 0V VID = 100 mV Output Swing Low RL = 10 kΩ to 0V VID = −100 mV RL = 2 kΩ to 0V VID = −100 mV ISC Output Short Circuit Current Sourcing from V+, VID = 200 mV (Note 9) Sinking to V−, VID = −200 mV (Note 9) 90 90 72 70 5.3 80 75 125 10 30 120 100 mA 250 300 350 400 250 300 350 400 −5.1 −5 dB +2.0 +2.5 250 300 Max (Note 7) +4 +5 Units mV µV/°C µA nA Common Mode Rejection Ratio −5V ≤ VCM ≤ 3V −5V ≤ VCM ≤ 5V PSRR CMVR Power Supply Rejection Ration 5V ≤ V+ ≤ 30V, VCM = −4.5V Input Common Mode Voltage Range CMRR > 50 dB dB V dB mV from either rail 3 www.national.com LM7332 Symbol IOUT IS SR ROUT fu GBWP en in THD+N CT Rej. Parameter Output Current Total Supply Current Slew Rate (Note 8) Condition VID = ±200 mV, VO = 1V from rails No Load, VCM = −4.5V AV = +1, VI = 8V Step, RL = 1 MΩ, CL = 10 pF RL = 10 MΩ, CL = 20 pF f = 50 kHz f = 2 kHz f = 2 kHz AV = +2, RL = 100 kΩ, f = 1 kHz VO = 8 VPP f = 3 MHz, Driver RL = 10 kΩ Min (Note 7) Typ (Note 6) ±65 1.5 13.2 3 7.9 19.9 14.7 1.3 −87 68 Max (Note 7) 2.4 2.6 Units mA mA V/µs Ω MHz MHz nV/ pA/ dB dB Close Loop Output Resistance AV = +1, f = 100 kHz Unity Gain Frequency Gain Bandwidth Product Input Referred Voltage Noise Input Referred Current Noise Total Harmonic Distortion +Noise Crosstalk Rejection ±15V Electrical Characteristics Symbol VOS TC VOS IB IOS CMRR Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Bias Current Input Offset Current (Note 5) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = +15V, V− = −15V, VCM = 0V, VO = 0V, and RL > 1 MΩ to 0V. Boldface limits apply at the temperature extremes. Condition VCM = −14.5V and VCM = 14.5V VCM = −14.5V and VCM = 14.5V (Note 10) (Note 11) −2.0 −2.5 Min (Note 7) −5 −6 Typ (Note 6) ±2 ±2 ±1.0 20 74 74 72 72 78 74 88 80 100 −15.3 15.1 15 AVOL VO Large Signal Voltage Gain Output Swing High −14V ≤ VO ≤ 14V RL = 10 kΩ to 0V RL = 10 kΩ to 0V VID = 100 mV RL = 2 kΩ to 0V VID = 100 mV Output Swing Low RL = 10 kΩ to 0V VID = −100 mV RL = 2 kΩ to 0V VID = −100 mV 72 70 15.3 80 100 200 20 25 350 400 550 600 450 500 550 600 −15.1 −15 dB +2.0 +2.5 250 300 Max (Note 7) +5 +6 Units mV µV/°C µA nA Common Mode Rejection Ratio −15V ≤ VCM ≤ 12V −15V ≤ VCM ≤ 15V PSRR CMVR Power Supply Rejection Ratio Input Common Mode Voltage Range −10V ≤ V+ ≤ 15V, VCM = −14.5V CMRR > 50 dB dB V dB mV from either rail www.national.com 4 LM7332 Symbol ISC Parameter Output Short Circuit Current Condition Sourcing from V+, VID = 200 mV (Note 9) Sinking to V−, VID = −200 mV (Note 9) Min (Note 7) Typ (Note 6) 140 140 ±70 2.0 15.2 9 21 15.5 1 −93 68 Max (Note 7) Units mA IOUT IS SR fu GBWP en in THD+N CT Rej. Output Current Total Supply Current Slew Rate (Note 8) Unity Gain Frequency Gain Bandwidth Product Input Referred Voltage Noise Input Referred Current Noise Total Harmonic Distortion +Noise Crosstalk Rejection VID = ±200 mV, VO = 1V from rails No Load, VCM = −14.5V AV = +1, VI = 20V Step, RL = 1 MΩ, CL = 10 pF RL = 10 MΩ, CL = 20 pF f = 50 kHz f = 2 kHz f = 2 kHz AV = +2, RL = 100 kΩ, f = 1 kHz VO = 25 VPP f = 3 MHz, Driver RL = 10 kΩ mA 2.5 3.0 mA V/µs MHz MHz nV/ pA/ dB dB Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Rating 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, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of JEDEC) Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC). 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. 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: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of the device such that TJ = TA. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self-heating where TJ > TA. Note 6: Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on shipped production material. Note 7: All limits are guaranteed by testing or statistical analysis. Note 8: Slew rate is the slower of the rising and falling slew rates. Connected as a Voltage Follower. Note 9: Short circuit test is a momentary test. Output short circuit duration is infinite for VS ≤ 6V at room temperature and below. For VS > 6V, allowable short circuit duration is 1.5 ms. Note 10: Offset voltage temperature drift determined by dividing the change in VOS at temperature extremes into the total temperature change. Note 11: Positive current corresponds to current flowing in the device. 5 www.national.com LM7332 Connection Diagrams 8-Pin MSOP 8-Pin SOIC 20187502 20187501 Top View Top View Ordering Information Package 8-Pin MSOP Part Number LM7332MM LM7332MME LM7332MMX 8-Pin SOIC LM7332MA LM7332MAX LM7332MA AA5A Package Marking Transport Media 1k Unit Tape and Reel 250 Units Tape and Reel 3.5k Unit Tape and Reel 95 Units/Rail 2.5k Unit Tape and Reel M08A MUA08A NSC Drawing www.national.com 6 LM7332 Typical Performance Characteristics VOS Distribution Unless otherwise specified, TA = 25°C. VOS vs. VCM (Unit 1) 20187551 20187503 VOS vs. VCM (Unit 2) VOS vs. VCM (Unit 3) 20187504 20187505 VOS vs. VCM (Unit 1) VOS vs. VCM (Unit 2) 20187506 20187507 7 www.national.com LM7332 VOS vs. VCM (Unit 3) VOS vs. VS (Unit 1) 20187508 20187524 VOS vs. VS (Unit 2) VOS vs. VS (Unit 3) 20187525 20187526 IBIAS vs. VCM IBIAS vs. Supply Voltage 20187528 20187527 www.national.com 8 LM7332 IS vs. VCM IS vs. VCM 20187514 20187515 IS vs. VCM IS vs. Supply Voltage 20187516 20187512 IS vs. Supply Voltage Output Swing vs. Sinking Current 20187513 20187530 9 www.national.com LM7332 Output Swing vs. Sinking Current Output Swing vs. Sourcing Current 20187531 20187517 Output Swing vs. Sourcing Current Positive Output Swing vs. Supply Voltage 20187518 20187522 Positive Output Swing vs. Supply Voltage Negative Output Swing vs. Supply Voltage 20187519 20187520 www.national.com 10 LM7332 Negative Output Swing vs. Supply Voltage Open Loop Frequency Response with Various Capacitive Loads 20187521 20187540 Open Loop Frequency Response with Various Capacitive Loads Open Loop Frequency Response with Various Capacitive Loads 20187541 20187542 Open Loop Frequency Response vs. with Various Resistive Loads Open Loop Frequency Response vs. with Various Supply Voltages 20187539 20187537 11 www.national.com LM7332 Open Loop Frequency Response at Various Temperatures Phase Margin vs. Capacitive Load 20187543 20187538 Phase Margin vs. Capacitive Load CMRR vs. Frequency 20187544 20187545 +PSRR vs. Frequency −PSRR vs. Frequency 20187546 20187547 www.national.com 12 LM7332 Step Response for Various Amplitudes Step Response for Various Amplitudes 20187533 20187532 Large Signal Step Response for Various Capacitive Loads Input Referred Noise Density vs. Frequency 20187534 20187548 Input Referred Noise Density vs. Frequency Input Referred Noise Density vs. Frequency 20187549 20187550 13 www.national.com LM7332 THD+N vs. Output Amplitude (VPP) THD+N vs. Output Amplitude (VPP) 20187552 20187553 THD+N vs. Output Amplitude (VPP) Crosstalk vs. Frequency 20187554 20187536 www.national.com 14 LM7332 Application Information ADVANTAGES OF THE LM7332 Wide Operating Voltage Range The LM7332 has an operating voltage from 2.5V to 32V which makes it suitable for industrial and automotive applications. RRIO with 100 mA Output Current The LM7332 takes advantages of National Semiconductor’s VIP3 process which enables high current driving from the rails. Rail-to-rail output swing provides the maximum possible output dynamic range. The LM7332 eliminates the need to use extra transistors when driving large capacitive loads, therefore reducing the application cost and space. -40°C to 125°C Operating Temperature Range The LM7332 has an operating temperature ranging from -40° C to 125°C, which is Automotive Grade 1, and also meets most industrial requirements. SOIC and MSOP Packages The LM7332 are offered in both the standard SOIC package and the space saving MSOP package. Please refer to the Physical Dimensions on page 17 for details. OUTPUT VOLTAGE SWING CLOSE TO V− The LM7332’s output stage design allows voltage swings to within millivolts of either supply rail for maximum flexibility and improved useful range. Because of this design architecture, with output approaching either supply rail, the output transistor Collector-Base junction reverse bias will decrease. With output less than a Vbe from either rail, the corresponding output transistor operates near saturation. In this mode of operation, the transistor will exhibit higher junction capacitance and lower ft which will reduce phase margin. With the Noise Gain (NG = 1 + RF/RG, RF and RG are external gain setting resistors) of 2 or higher, there is sufficient phase margin that this reduction in phase margin is of no consequence. However, with lower Noise Gain (