Low-Cost, CMOS, Rail-to-Rail, I/O OPERATIONAL AMPLIFIERS

Transcription

1 OPA7 OPA7 OPA7 OPA7 OPA7 OPA47 OPA7 SBOS8A JUNE Low-Cost, CMOS, Rail-to-Rail, I/O OPERATIONAL AMPLIFIERS FEATURES RAIL-TO-RAIL INPUT AND OUTPUT WIDE SUPPLY RANGE: Single Supply: 4V to V Dual Supplies: ± to ±6 LOW QUIESCENT CURRENT: 6µA LIMITED RANGE CMRR: 96dB LOW OFFSET:.mV HIGH SPEED: MHz,.6V/µs MicroSIZE PACKAGES: SOT3-, MSOP-8, TSSOP-4 LOW INPUT BIAS CURRENT: pa APPLICATIONS AUTOMOTIVE APPLICATIONS: Audio, Sensor Applications, Security Systems PORTABLE EQUIPMENT ACTIVE FILTERS TRANSDUCER AMPLIFIER TEST EQUIPMENT DATA ACQUISITION NC DESCRIPTION The OPA7 series low-cost op amps are optimized for applications requiring rail-to-rail input and output swing. Single, dual, and quad versions are offered in a variety of packages. While the quiescent current is less than µa per amplifier, the OPA7 still offers excellent dynamic performance (MHz GBW and.6v/µs SR) and unity-gain stability. The OPA7 series is fully specified and guaranteed over the supply range of ±V to ±6V. Input swing extends 3mV beyond the rail and the output swings to within 4mV of the rail. The single version (OPA7) is available in the MicroSIZE SOT3- and in the standard SO-8 surface-mount packages. The dual version (OPA7) is available in the MSOP-8, SO-8, and DIP-8 packages. The quad OPA47 is available in the TSSOP-4 and SO-4 packages. All are specified for operation from 4 C to +8 C. OPA7 8 NC In 7 V+ OPA7 +In V Out NC Out A OPA47 4 Out D Out V V+ OPA7 SO-8, DIP-8 In A +In A 3 A D 3 In D +In D +In 3 4 In Out A 8 V+ V+ 4 V SOT3- In A +In A 3 A B 7 6 Out B In B +In B In B 6 B C 9 +In C In C V 4 +In B Out B 7 8 Out C MSOP-8, SO-8, DIP-8 TSSOP-4, SO-4 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright, Texas Instruments Incorporated

2 ABSOLUTE MAXIMUM RATINGS () Supply Voltage, V+ to V... 3.V Signal Input Terminals, Voltage ()... (V ).3V to (V+) +.3V Current ()... ma Output Short-Circuit (3)... Continuous Operating Temperature... C to + C Storage Temperature... 6 C to + C Junction Temperature... + C Lead Temperature (soldering, s) C NOTES: () Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. () Input terminals are diode-clamped to the power supply rails. Input signals that can swing more than.3v beyond the supply rails should be current-limited to ma or less. (3) Short-circuit to ground, one amplifier per package. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION MINIMUM PACKAGE RECOMMENDED DRAWING PACKAGE ORDERING TRANSPORT PRODUCT DESCRIPTION GAIN PACKAGE NUMBER MARKING NUMBER () MEDIA OPA7NA Single, GBW = MHz SOT3-33 A OPA7NA/ Tape and Reel " " " " " " OPA7NA/3K Tape and Reel OPA7UA Single, GBW = MHz SO-8 8 OPA7UA OPA7UA Rails " " " " " " OPA7UA/K Tape and Reel OPA7PA Single, GBW = MHz DIP-8 6 OPA7PA OPA7PA Rails OPA7EA Dual, GBW = MHz MSOP B OPA7EA/ Tape and Reel " " " " " " OPA7EA/K Tape and Reel OPA7UA Dual, GBW = MHz SO-8 8 OPA7UA OPA7UA Rails " " " " " " OPA7UA/K Tape and Reel OPA7PA Dual, GBW = MHz DIP-8 6 OPA7PA OPA7PA Rails OPA47EA Quad, GBW = MHz TSSOP-4 37 OPA47EA OPA47EA/ Tape and Reel " " " " " " OPA47EA/K Tape and Reel OPA47UA Quad, GBW = MHz SO-4 3 OPA47UA OPA47UA Rails " " " " " " OPA47UA/K Tape and Reel NOTE: () Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /3K indicates 3 devices per reel). Ordering 3 pieces of OPA7NA/3K will get a single 3-piece Tape and Reel. OPA7, 7, 47 SBOS8A

3 ELECTRICAL CHARACTERISTICS: V S = 4V to V Boldface limits apply over the specified temperature range, T A = 4 C to +8 C At T A = + C, R L = kω connected to V S / and V OUT = V S /, unless otherwise noted. OPA7NA, UA, PA OPA7EA, UA, PA OPA47EA, UA PARAMETER CONDITION MIN TYP MAX UNITS OFFSET VOLTAGE Input Offset Voltage V OS V S = ±V, V CM = V ±. ± mv Drift dv OS /dt T A = 4 C to +8 C ±4 µv/ C vs Power Supply PSRR V S = ±V to ±6V, V CM = V µv/v Over Temperature V S = ±V to ±6V, V CM = V µv/v Channel Separation, dc R L = kω µv/v f = khz 98 db INPUT VOLTAGE RANGE Common-Mode Voltage Range V CM (V ).3 (V+) +.3 V Common-Mode Rejection Ratio CMRR V S = ±V, (V ).3V < V CM < (V+) +.3V db over Temperature V S = ±V, (V ) < V CM < (V+) 74 db V S = ±V, (V ).3V < V CM < (V+) V db over Temperature V S = ±V, (V ) < V CM < (V+) V 93 db INPUT BIAS CURRENT Input Bias Current I B V S = ±V, V CM = V ± ± pa Input Offset Current I OS V S = ±V, V CM = V ±. ± pa INPUT IMPEDANCE Differential Ω pf Common-Mode 4 Ω pf NOISE Input Voltage Noise, f =.Hz to Hz V S = ±V, V CM = V 6 µvp-p Input Voltage Noise Density, f = khz e n V S = ±V, V CM = V 4 nv/ Hz Current Noise Density, f = khz i n V S = ±V, V CM = V. fa/ Hz OPEN-LOOP GAIN Open-Loop Voltage Gain A OL R L = kω, (V )+.V < V O < (V+).V db R L = kω, (V )+.7V < V O < (V+).7V db over Temperature R L = kω, (V )+.7V < V O < (V+).7V 6 db R L = kω, (V )+.V < V O < (V+).V db over Temperature R L = kω, (V )+.V < V O < (V+).V 6 db OUTPUT Voltage Output Swing from Rail R L = kω, A OL > 8dB 4 mv R L = kω, A OL > db 7 mv R L = kω, A OL > db mv Output Current I OUT V S V OUT < V ± ma Short-Circuit Current I SC ±4 ma Capacitive Load Drive C LOAD See Typical Performance Curves FREQUENCY RESPONSE C L = pf Gain-Bandwidth Product GBW G = + MHz Slew Rate SR V S = ±V, G = +.6 V/µs Settling Time,.% t S V S = ±V, V Step, G = + µs.% V S = ±V, V Step, G = + µs Overload Recovery Time V IN Gain = V S 3 µs Total Harmonic Distortion + Noise THD+N V S = ±V, V O = 3Vp-p, G = +, f = khz. % POWER SUPPLY Specified Voltage Range, Single Supply V S 4 V Specified Voltage Range, Dual Supplies V S ± ±6 V Operating Voltage Range 3.6 to V Quiescent Current (per amplifier) I Q I O = 6 µa over Temperature µa TEMPERATURE RANGE Specified Range 4 8 C Operating Range C Storage Range 6 C Thermal Resistance θ JA SOT3- Surface-Mount C/W MSOP-8 Surface-Mount C/W TSSOP-4 Surface-Mount C/W SO-8 Surface Mount C/W SO-4 Surface Mount C/W DIP-8 C/W OPA7, 7, 47 3 SBOS8A

4 TYPICAL CHARACTERISTICS At T A = + C, V S = ±V, and R L = kω, unless otherwise noted. GAIN AND PHASE vs FREQUENCY CMRR vs FREQUENCY 8 8 CMRR Limited Range Gain (db) 4 4 Phase ( ) CMRR (db) 6 4 CMRR Full Scale k k k M M k k k M Frequency (Hz) Frequency (Hz) 4 PSRR vs FREQUENCY 7 6 MAXIMUM AMPLITUDE vs FREQUENCY (V+) (V ) = V PSRR (db) Amplitude (V) 4 3 k k k M k k k M M Frequency (Hz) Frequency (Hz) 6 CHANNEL SEPARATION vs FREQUENCY INPUT CURRENT AND VOLTAGE SPECTRAL NOISE vs FREQUENCY Channel Separation (db) Input Current and Voltage Spectral Noise nv/ Hz Voltage Noise Current Noise Output Current Spectral Noise fa/ Hz.. k k k M. k k k M Frequency (Hz) Frequency (Hz) 4 OPA7, 7, 47 SBOS8A

5 TYPICAL CHARACTERISTICS (Cont.) At T A = + C, V S = ±V, and R L = kω, unless otherwise noted. COMMON-MODE REJECTION RATIO vs TEMPERATURE 4 OPEN-LOOP GAIN vs TEMPERATURE CMRR (db) 9 8 Limited Scale A OL (db) Full Scale Temperature ( C) Temperature ( C) INPUT BIAS (I B ) AND OFFSET (I OS ) CURRENT vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE Bias Current (pa). I B I OS I Q (µa). 7 Temperature ( C) Temperature ( C) PSRR vs TEMPERATURE. TOTAL HARMONIC DISTORTION PLUS NOISE (Load = kω, BW = 8kHz,.Vrms, G = +) PSRR (db) 9 8 THD (%) Temperature ( C). k k k Frequency (Hz) OPA7, 7, 47 SBOS8A

6 TYPICAL CHARACTERISTICS (Cont.) At T A = + C, V S = ±V, and R L = kω, unless otherwise noted. INPUT BIAS CURRENT (I B ) vs COMMON-MODE VOLTAGE (V CM ) TEMPERATURE = C INPUT BIAS CURRENT (I B ) vs COMMON-MODE VOLTAGE (V CM ) TEMPERATURE = C Input Bias Current (pa) Input Bias Current (na) Common-Mode Voltage, V CM (V) Common-Mode Voltage, V CM (V) Quiescent Current (µa) QUIESCENT CURRENT vs SUPPLY VOLTAGE Short-Circuit Current (ma) SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE I SC N (Sinking) I SC P (Sourcing) Supply Voltage (V) Supply Voltage (V) Output Voltage (V) OUTPUT VOLTAGE SWING vs OUTPUT CURRENT Sourcing Sinking + C + C + C + C C C Overshoot (%) SMALL-SIGNAL OVERSHOOT (%) vs CAPACITIVE LOAD AND GAIN G = + G = + G = k k Output Current (±ma) Load Capacitance Value (pf) 6 OPA7, 7, 47 SBOS8A

7 TYPICAL CHARACTERISTICS (Cont.) At T A = + C, V S = ±V, and R L = kω, unless otherwise noted. Settling Time (µs) SETTLING TIME vs GAIN.%.% Non-Inverting Gain (V/V) Frequency (%) V OS PRODUCTION DISTRIBUTION Voltage Offset (mv) V OS DRIFT PRODUCTION DISTRIBUTION SMALL SIGNAL STEP RESPONSE (G = +V/V, R L = kω, C L = pf) Frequency (%) mv/div < < 3 < 6 < 9 < < < 8 < < 4 < 7 < 3 > 3 µs/div Voltage Offset (µv/ C) LARGE SIGNAL STEP RESPONSE (G = +V/V, R L = kω, C L = pf) V/div µs/div OPA7, 7, 47 7 SBOS8A

8 APPLICATIONS INFORMATION OPA7 series op amps can operate on 6µA quiescent current from a single (or split) supply in the range of 4V to V (±V to ±6V), making them highly versatile and easy to use. The OPA7 is unity-gain stable and offers MHz bandwidth and.6v/µs slew rate. Rail-to-rail input and output swing helps maintain dynamic range, especially in low supply applications. Figure shows the input and output waveforms for the OPA7 in unitygain configuration. Operation is from a ±V supply with a kω load connected to V S /. The input is a Vp-p sinusoid. Output voltage is approximately Vp-p..V/div Input Output (inverted on scope) µs/div FIGURE. Rail-to-Rail Input and Output. G = +, V S = ±V Power-supply pins should be bypassed with pf ceramic capacitors in parallel with µf tantalum capacitors. OPERATING VOLTAGE OPA7 series op amps are fully specified and guaranteed from +4V to +V over a temperature range of 4ºC to +8ºC. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics. RAIL-TO-RAIL INPUT The input common-mode voltage range of the OPA7 series extends 3mV beyond the supply rails at room temperature. This is achieved with a complementary input stage an N- channel input differential pair in parallel with a P-channel differential pair, as shown in Figure. The N-channel pair is active for input voltages close to the positive rail, typically (V+).V to 3mV above the positive supply, while the P- channel pair is on for inputs from 3mV below the negative supply to approximately (V+).V. There is a small transition region, typically (V+).V to (V+).V, in which both pairs are on. This mv transition region can vary ±mv with process variation. Thus, the transition region (both stages on) can range from (V+).V to (V+).4V on the low end, up to (V+).9V to (V+).6V on the high end. Within the mv transition region PSRR, CMRR, offset voltage, and offset drift, and THD may vary compared to operation outside this region. V+ V O V IN + V IN V FIGURE. Simplified Schematic. 8 OPA7, 7, 47 SBOS8A

9 INPUT VOLTAGE Device inputs are protected by ESD diodes that will conduct if the input voltages exceed the power supplies by more than approximately 3mV. Momentary voltages greater than 3mV beyond the power supply can be tolerated if the current is limited to ma. This is easily accomplished with an input resistor, as shown in Figure 3. Many input signals are inherently current-limited to less than ma; therefore, a limiting resistor is not always required. The OPA7 features no phase inversion when the inputs extend beyond supplies if the input current is limited, as seen in Figure 4. V IN I OVERLOAD ma max R +V OPA7 V V OUT RAIL-TO-RAIL OUTPUT A class AB output stage with common-source transistors is used to achieve rail-to-rail output. This output stage is capable of driving kω loads connected to any point between V+ and ground. For light resistive loads (> kω), the output voltage can swing to 4mV from the supply rail. With moderate resistive loads (kω), the output can swing to within 7mV from the supply rails while maintaining high open-loop gain (see the typical performance curve Output Voltage Swing vs Output Current ). CAPACITIVE LOAD AND STABILITY The OPA7 series op amps can drive up to pf pure capacitive load. Increasing the gain enhances the amplifier s ability to drive greater capacitive loads (see the typical performance curve Small Signal Overshoot vs Capacitive Load ). One method of improving capacitive load drive in the unitygain configuration is to insert a Ω to Ω resistor inside the feedback loop, as shown in Figure. This reduces ringing with large capacitive loads while maintaining DC accuracy. FIGURE 3. Input Current Protection for Voltages Exceeding the Supply Voltage. OPA7 R S Ω V OUT V IN C L R L V S = ±.V, V IN = Vp-p.V/div µs/div FIGURE 4. OPA7 No Phase Inversion with Inputs Greater than the Power-Supply Voltage. FIGURE. Series Resistor in Unity-Gain Buffer Configuration Improves Capacitive Load Drive. APPLICATION CIRCUITS The OPA7 series op amps are optimized for driving medium-speed sampling data converters. Figure 6 shows the OPA7 in a dual-supply buffered reference configuration for the DAC7644. The DAC7644 is a 6-bit, low-power, quad-voltage output converter. Small size makes the combination ideal for automatic test equipment, data acquisition systems, and other low-power space-limited applications. OPA7, 7, 47 9 SBOS8A

10 DAC7644 NC NC NC NC 4 +V V OUT A Sense 44 V OUT A 43 V OUT V V REF L AB Sense V REF L AB V REF H AB pf / OPA7.V Ref Negative Reference V REF H AB Sense 39 V+ V OUT B Sense V OUT B V OUT pf / OPA7 +.V Ref Positive Reference V FIGURE 6. OPA7 as Dual Supply Configuration-Buffered References for the DAC7644. OPA7, 7, 47 SBOS8A

11 PACKAGE OPTION ADDENDUM 7-Oct-7 PACKAGING INFORMATION Orderable Device Status () Package Type Package Drawing Pins Package Qty Eco Plan OPA7EA/ ACTIVE VSSOP DGK 8 Green (RoHS OPA7EA/G4 ACTIVE VSSOP DGK 8 Green (RoHS OPA7PA ACTIVE PDIP P 8 Green (RoHS OPA7PAG4 ACTIVE PDIP P 8 Green (RoHS OPA7UA ACTIVE SOIC D 8 7 Green (RoHS OPA7UAG4 ACTIVE SOIC D 8 7 Green (RoHS OPA47EA/ ACTIVE TSSOP PW 4 Green (RoHS OPA47EA/G4 ACTIVE TSSOP PW 4 Green (RoHS OPA47EA/K ACTIVE TSSOP PW 4 Green (RoHS OPA47EA/KG4 ACTIVE TSSOP PW 4 Green (RoHS OPA7NA/ ACTIVE SOT-3 DBV Green (RoHS OPA7NA/G4 ACTIVE SOT-3 DBV Green (RoHS OPA7NA/3K ACTIVE SOT-3 DBV 3 Green (RoHS OPA7PA ACTIVE PDIP P 8 Green (RoHS OPA7UA ACTIVE SOIC D 8 7 Green (RoHS () Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp ( C) CU NIPDAUAG Level--6C- YEAR -4 to 8 B CU NIPDAUAG Level--6C- YEAR -4 to 8 B CU NIPDAU N / A for Pkg Type -4 to 8 OPA7PA CU NIPDAU N / A for Pkg Type -4 to 8 OPA7PA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 7UA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 7UA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 47EA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 47EA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 47EA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 47EA CU NIPDAU Level--6C- YEAR -4 to 8 A CU NIPDAU Level--6C- YEAR -4 to 8 A CU NIPDAU Level--6C- YEAR -4 to 8 A CU NIPDAU N / A for Pkg Type -4 to 8 OPA7PA CU NIPDAU Level--6C- YEAR -4 to 8 OPA 7UA Device Marking (4/) Samples () 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. Addendum-Page

12 PACKAGE OPTION ADDENDUM 7-Oct-7 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. () RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all RoHS substances, including the requirement that RoHS substance do not exceed.% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS79B low halogen requirements of <=ppm threshold. Antimony trioxide based flame retardants must also meet the <=ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. () Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page

13 PACKAGE MATERIALS INFORMATION 9-Jan-4 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W (mm) A (mm) B (mm) K (mm) P (mm) W (mm) Pin Quadrant OPA7EA/ VSSOP DGK Q OPA47EA/ TSSOP PW Q OPA47EA/K TSSOP PW Q OPA7NA/ SOT-3 DBV Q3 OPA7NA/3K SOT-3 DBV Q3 Pack Materials-Page

14 PACKAGE MATERIALS INFORMATION 9-Jan-4 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA7EA/ VSSOP DGK OPA47EA/ TSSOP PW OPA47EA/K TSSOP PW OPA7NA/ SOT-3 DBV OPA7NA/3K SOT-3 DBV Pack Materials-Page

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