OPA340 OPA2340 OPA4340 OP A3 40 OPA 2340 OP A4 340 SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier™ Series FEATURES DESCRIPTION • • • • • • • • OPA340 series rail-to-rail CMOS operational amplifiers are optimized for low-voltage, single-supply operation. Rail-to-rail input/output and high-speed operation make them ideal for driving sampling analog-to-digital (A/D) converters. They are also well-suited for general purpose and audio applications as well as providing I/V conversion at the output of digital-to-analog (D/A) converters. Single, dual, and quad versions have identical specifications for design flexibility. 1 23 RAIL-TO-RAIL INPUT RAIL-TO-RAIL OUTPUT (within 1mV) MicroSIZE PACKAGES WIDE BANDWIDTH: 5.5MHz HIGH SLEW RATE: 6V/µs LOW THD+NOISE: 0.0007% (f = 1kHz) LOW QUIESCENT CURRENT: 750µA/channel SINGLE, DUAL, AND QUAD VERSIONS The OPA340 series operate on a single supply as low as 2.5V with an input common-mode voltage range that extends 500mV below ground and 500mV above the positive supply. Output voltage swing is to within 1mV of the supply rails with a 100kΩ load. They offer excellent dynamic response (BW = 5.5MHz, SR = 6V/µs), yet quiescent current is only 750µA. Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction. APPLICATIONS • • • • • • • • DRIVING A/D CONVERTERS PCMCIA CARDS DATA ACQUISITION PROCESS CONTROL AUDIO PROCESSING COMMUNICATIONS ACTIVE FILTERS TEST EQUIPMENT The single (OPA340) packages are the tiny 5-lead SOT23-5 surface mount, SO-8 surface mount, and DIP-8. The dual (OPA2340) comes in the miniature MSOP-8 surface mount, SO-8 surface mount, and DIP-8 packages. The quad (OPA4340) packages are the space-saving SSOP-16 surface mount and SO-14 surface mount. All are specified from –40°C to +85C and operate from –55°C to +125°C. A SPICE macromodel is available for design analysis. OPA4340 OPA4340 Out A OPA340 Out 1 5 V+ NC V- 2 +In 3 OPA2340 OPA340 4 -In (1) 1 8 NC (1) Out A 1 -In 2 7 V+ -In A 2 +In 3 6 Output +In A 3 V- 4 5 NC (1) V- Out A 8 A 7 B 4 Out B -In A +In A 14 2 13 A D 3 12 6 -In B V+ 4 +In B +In B 5 B DIP-8, SO-8 DIP-8, SO-8, MSOP-8 -In B Out B NOTE: (1) NC denotes no internal connection. Out D -In D -In A +In A 11 V- +In B 10 +In C -In B 9 -In C Out B C 6 7 8 SO-14 1 16 Out D 2 15 -In D 3 14 +In D 4 13 V- 5 12 +In C 6 11 -In C 7 10 Out C 8 9 NC A D +In D V+ 5 SOT23-5 V+ 1 Out C NC B C (1) (1) SSOP-16 1 2 3 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. MicroAmplifier is a trademark of Texas Instruments, Inc. All other 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 © 1997–2007, Texas Instruments Incorporated OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 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. ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage VALUE UNIT 5.5 V Signal Input Terminals Voltage (2) (V–) – 0.5 to (V+) + 0.5 V Current (2) 10 mA Output Short-Circuit (3) Continuous Operating Temperature –55 to +125 °C Storage Temperature –55 to +125 °C Junction Temperature +150 °C (1) (2) (3) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails should be current limited to 10mA or less. Short-circuit to ground, one amplifier per package. PACKAGE/ORDERING INFORMATION (1) PACKAGE-LEAD PACKAGE DESIGNATOR SPECIFIED TEMPERATURE RANGE PACKAGE MARKING OPA340NA 5-Lead SOT-23-5 DBV –40°C to +85°C A40 OPA340PA 8-Pin DIP P –40°C to +85°C OPA340PA PRODUCT ORDERING NUMBER (2) TRANSPORT MEDIA, QUANTITY Single OPA340UA SO-8 Surface-Mount D –40°C to +85°C OPA340UA MSOP-8 Surface-Mount DGK –40°C to +85°C A40A OPA340NA/250 OPA340NA/3K OPA340PA OPA340UA OPA340UA/2K5 Tape and Reel Rails Rails (3) Dual OPA2340EA OPA2340EA/250 OPA2340EA/2K5 Tape and Reel OPA2340PA 8-Pin DIP P –40°C to +85°C OPA2340PA OPA2340PA Rails OPA2340UA SO-8 Surface-Mount D –40°C to +85°C OPA2340UA OPA2340UA Rails (3) OPA4340EA SSOP-16 Surface-Mount DBQ –40°C to +85°C OPA4340EA OPA4340UA SO-14 Surface Mount D –40°C to +85°C OPA4340UA Quad (1) (2) (3) 2 OPA4340EA/250 OPA4340EA/2K5 OPA4340UA OPA4340UA/2K5 Tape and Reel Rails (3) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Models with /250, /2500, and /3K are available only in tape and reel in the quantities indicated (e.g., /250 indicates 250 devices per reel). Ordering 3000 pieces of OPA340NA/3K will get a single 3000 piece tape and reel. SO-8 and SO-14 models also available in tape and reel. Submit Documentation Feedback Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 ELECTRICAL CHARACTERISTICS: VS = 2.7V to 5V BOLDFACE limits apply over the specified temperature range, TA = –40°C to +85°C. VS = 5V. At TA = +25°C, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted. OPA340NA, PA, UA OPA2340EA, PA, UA OPA4340EA, UA PARAMETER CONDITIONS MIN TYP (1) MAX UNIT ±150 ±500 µV OFFSET VOLTAGE Input Offset Voltage VOS vs Temperature dVOS/dT vs Power Supply PSRR Over Temperature VS = 5V µV/°C ±2.5 VS = 2.7V to 5.5V, VCM = 0V 30 VS = 2.7V to 5.5V, VCM = 0V Channel Separation, dc 120 µV/V 120 µV/V µV/V 0.2 INPUT BIAS CURRENT Input Bias Current IB ±0.2 Over Temperature Input Offset Current ±10 pA ±60 pA ±10 pA IOS ±0.2 8 µVrms en 25 nV/√Hz in 3 fA/√Hz NOISE Input Voltage Noise, f = 0.1kHz to 50kHz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz INPUT VOLTAGE RANGE Common-Mode Voltage Range VCM Common-Mode Rejection Ratio CMRR –0.3 (V+) + 0.3 V –0.3V < VCM < (V+) – 1.8V 80 92 dB VS = 5V, –0.3V < VCM < 5.3V 70 84 dB VS = 2.7V, –0.3V < VCM < 3V 66 80 dB INPUT IMPEDANCE Differential Common-Mode 1013 3 Ω pF 13 6 Ω pF 10 OPEN-LOOP GAIN Open-Loop Voltage Gain RL = 100kΩ, 5mV < VO < (V+) – 5mV 106 Over Temperature AOL RL = 100kΩ, 5mV < VO < (V+) – 5mV 106 RL = 10kΩ, 5mV < VO < (V+) – 50mV 100 Over Temperature RL = 10kΩ, 5mV < VO < (V+) – 50mV 100 RL = 2kΩ, 200mV < VO < (V+) – 200mV 94 Over Temperature RL = 2kΩ, 200mV < VO < (V+) – 200mV 94 124 dB dB 120 dB dB 114 dB dB FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate GBW SR G=1 5.5 MHz VS = 5V, G = 1, CL = 100pF 6 V/µs Settling Time, 0.1% VS = 5V, 2V Step, CL = 100pF 1 µs Settling Time, 0.01% VS = 5V, 2V Step, CL = 100pF 1.6 µs VIN • G = VS 0.2 µs VS = 5V, VO = 3VPP (2), G = 1, f = 1kHz 0.0007 % Overload Recovery Time Total Harmonic Distortion + Noise (1) (2) THD+N VS = +5V. VOUT = 0.25V to 3.25V. Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 Submit Documentation Feedback 3 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 ELECTRICAL CHARACTERISTICS: VS = 2.7V to 5V (continued) BOLDFACE limits apply over the specified temperature range, TA = –40°C to +85°C. VS = 5V. At TA = +25°C, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted. OPA340NA, PA, UA OPA2340EA, PA, UA OPA4340EA, UA PARAMETER CONDITIONS MIN TYP (1) MAX 1 5 mV 5 mV UNIT OUTPUT (3) Voltage Output Swing from Rail (4) RL = 100kΩ, AOL ≥ 106dB Over Temperature RL = 100kΩ, AOL ≥ 106dB Over Temperature RL = 10kΩ, AOL ≥ 100dB Over Temperature RL = 2kΩ, AOL ≥ 94dB RL = 10kΩ, AOL ≥ 100dB 10 RL = 2kΩ, AOL ≥ 94dB Short-Circuit Current Capacitive Load Drive 40 ISC 50 mV 50 mV 200 mV 200 mV ±50 CLOAD mA See Typical Characteristics POWER SUPPLY Specified Voltage Range VS 2.7 Operating Voltage Range Quiescent Current (per amplifier) 5 2.5 to 5.5 IQ Over Temperature IO = 0, VS = +5V 750 IO = 0, VS = +5V V V 950 µA 1100 µA TEMPERATURE RANGE Specified Range –40 +85 °C Operating Range –55 +125 °C Storage Range –55 +125 °C Thermal Resistance (3) (4) 4 Θ JA SOT23-5 Surface Mount 200 °C/W MSOP-8 Surface Mount 150 °C/W SO-8 Surface Mount 150 °C/W DIP-8 Surface Mount 100 °C/W SSOP-16 Surface Mount 100 °C/W SO-14 Surface Mount 100 °C/W VS = +5V. Output voltage swings are measured between the output and power supply rails. Submit Documentation Feedback Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 TYPICAL CHARACTERISTICS At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. OPEN-LOOP GAIN/PHASE vs FREQUENCY POWER-SUPPLY AND COMMON-MODE REJECTION vs FREQUENCY 160 100 0 PSRR 140 80 100 80 -90 60 40 -135 PSRR, CMRR (dB) -45 Phase (°) Voltage Gain (dB) 120 20 60 40 CMRR 20 0 -180 -20 0 0.1 1 10 100 1k 10k 100k 1M 10M 1 10 100 Frequency (Hz) 1k 10k 100k 1M Frequency (Hz) Figure 1. Figure 2. INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY CHANNEL SEPARATION vs FREQUENCY 140 1k 10k Voltage Noise 100 10 10 1 Channel Separation (dB) 100 1k Current Noise (fA/ÖHz) Voltage Noise (nV/ÖHz) Current Noise 130 120 110 G = 1, All Channels 100 0.1 1 1 10 100 1k 10k 100k 10 1M 100 1k 100k Figure 3. Figure 4. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY 0.1 5k G = 100 RL = 2kW 0.01 G = 10 RL = 10kW RL = 600 0.001 RL = 2kW G=1 RL = 10kW 0.0001 Output Resistance (W) RL = 600 THD+N (%) 10k Frequency (Hz) Frequency (Hz) 4k G = 10 3k 2k G=1 1k 0 20 100 1k 10k 20k 10 100 Frequency (Hz) Figure 5. 1k 10k 100k 1M 10M Frequency (Hz) Figure 6. Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 Submit Documentation Feedback 5 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. OPEN-LOOP GAIN AND POWER-SUPPLY REJECTION vs TEMPERATURE 130 RL = 100kW AOL 120 90 RL = 10kW 110 CMRR (dB) AOL, PSRR (dB) COMMON-MODE REJECTION vs TEMPERATURE 100 RL = 2kW 100 80 70 60 PSRR 90 VS = 2.7V to 5V, VCM = -0.3V to (V+) -1.8V VS = 5V, VCM = -0.3V to 5.3V VS = 2.7V, VCM = -0.3V to 3V 50 40 80 -75 -50 0 -25 25 50 75 100 -75 125 0 25 50 Figure 7. Figure 8. QUIESCENT CURRENT vs TEMPERATURE 75 100 125 QUIESCENT CURRENT vs SUPPLY VOLTAGE 800 Per Amplifier Per Amplifier 900 Quiescent Current (mA) Quiescent Current (mA) -25 Temperature (°C) 1000 800 700 600 750 700 650 600 500 -75 -50 0 -25 25 50 75 100 2.0 125 2.5 3.0 3.5 4.0 4.5 Temperature (°C) Supply Voltage (V) Figure 9. Figure 10. SHORT-CIRCUIT CURRENT vs TEMPERATURE 5.0 5.5 6.0 SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE 60 100 Short-Circuit Current (mA) -ISC 90 Short-Circuit Current (mA) -50 Temperature (°C) 80 70 60 50 +ISC 40 30 20 -ISC 50 +ISC 40 10 30 0 -75 -50 -25 0 25 50 75 100 125 2.0 2.5 3.0 Figure 11. 6 Submit Documentation Feedback 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) Temperature (°C) Figure 12. Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE INPUT BIAS CURRENT vs TEMPERATURE 1.0 1k Input Bias Current (pA) Input Bias Current (pA) 0.8 100 10 1 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 0.1 -1.0 -75 -50 0 -25 25 50 75 100 125 0 -1 1 Temperature (°C) 2 Figure 13. OUTPUT VOLTAGE SWING vs OUTPUT CURRENT -55°C 3 2 1 +125°C -55°C +25°C ±10 ±20 ±30 ±40 ±50 Maximum output voltage without slew rate-induced distortion. ±60 ±70 ±80 4 VS = 2.7V 3 2 ±90 0 100k ±100 1M Output Current (mA) Figure 15. Figure 16. OFFSET VOLTAGE PRODUCTION DISTRIBUTION OFFSET VOLTAGE DRIFT MAGNITUDE PRODUCTION DISTRIBUTION 25 Typical production distribution of packaged units. Percent of Amplifiers (%) Percent of Amplifiers (%) 14 10M Frequency (Hz) 18 16 6 1 0 0 VS = 5.5V 5 Output Voltage (VPP) Output Voltage (V) 4 5 MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 6 +25°C 4 Figure 14. 5 +125°C 3 Common-Mode Voltage (V) 12 10 8 6 4 Typical production distribution of packaged units. 20 15 10 5 2 0 500 400 300 200 100 0 -100 -200 -300 -400 -500 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 15 Offset Voltage Drift (mV/°C) Offset Voltage (mV) Figure 17. Figure 18. Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 Submit Documentation Feedback 7 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. LARGE-SIGNAL STEP RESPONSE CL = 100pF 1V/div 50mV/div SMALL-SIGNAL STEP RESPONSE CL = 100pF 1ms/div 1ms/div Figure 19. Figure 20. SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE SETTLING TIME vs CLOSED-LOOP GAIN 100 60 G = -1 0.01% Settling Time (ms) Overshoot (%) 50 G = +1 40 30 G = -5 20 10 0.1% 1 See text for reducing overshoot. G = +5 0.1 0 100 8 10 1000 10k 1 10 100 Load Capacitance (pF) Closed-Loop Gain (V/V) Figure 21. Figure 22. Submit Documentation Feedback 1000 Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 APPLICATIONS INFORMATION OPA340 series op amps are fabricated on a state-of-the-art, 0.6 micron CMOS process. They are unity-gain stable and suitable for a wide range of general-purpose applications. Rail-to-rail input/output make them ideal for driving sampling A/D converters. In addition, excellent ac performance makes them well-suited for audio applications. The class AB output stage is capable of driving 600Ω loads connected to any point between V+ and ground. Rail-to-rail input and output swing significantly increases dynamic range, especially in low-supply applications. Figure 23 shows the input and output waveforms for the OPA340 in unity-gain configuration. Operation is from a single +5V supply with a 10kΩ load connected to VS/2. The input is a 5VPP sinusoid. Output voltage is approximately 4.98VPP. Power-supply pins should be bypassed with 0.01µF ceramic capacitors. VS = +5, G = +1, RL = 10kW 5 2V/div VIN 5 VOUT from –40°C to +85°C. Most behavior remains virtually unchanged throughout the full operating voltage range. Parameters which 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 OPA340 series extends 500mV beyond the supply rails. 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 24). The N-channel pair is active for input voltages close to the positive rail, typically (V+) – 1.3V to 500mV above the positive supply, while the P-channel pair is on for inputs from 500mV below the negative supply to approximately (V+) – 1.3V. There is a small transition region, typically (V+) – 1.5V to (V+) – 1.1V, in which both pairs are on. This 400mV transition region can vary ±300mV with process variation. Thus, the transition region (both stages on) can range from (V+) – 1.8V to (V+) – 1.4V on the low end, up to (V+) – 1.2V to (V+) – 0.8V on the high end. OPA340 series op amps are laser-trimmed to the reduce offset voltage difference between the N-channel and P-channel input stages, resulting in improved common-mode rejection and a smooth transition between the N-channel pair and the P-channel pair. However, within the 400mV transition region PSRR, CMRR, offset voltage, offset drift, and THD may be degraded compared to operation outside this region. 0 Figure 23. Rail-to-Rail Input and Output OPERATING VOLTAGE OPA340 series op amps are fully specified from +2.7V to +5V. However, supply voltage may range from +2.5V to +5.5V. Parameters are ensured over the specified supply range—a unique feature of the OPA340 series. In addition, many specifications apply A double-folded cascode adds the signal from the two input pairs and presents a differential signal to the class AB output stage. Normally, input bias current is approximately 200fA; however, input voltages exceeding the power supplies by more than 500mV can cause excessive current to flow in or out of the input pins. Momentary voltages greater than 500mV beyond the power supply can be tolerated if the current on the input pins is limited to 10mA. This is easily accomplished with an input resistor, as shown in Figure 25. Many input signals are inherently current-limited to less than 10mA; therefore, a limiting resistor is not required. Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 Submit Documentation Feedback 9 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 V+ Reference Current VIN+ VINVBIAS1 Class AB Control Circuitry VO VBIAS2 V(Ground) Figure 24. Simplified Schematic V+ IOVERLOAD 10mA max OPAx340 VOUT VIN 5kW Figure 25. Input Current Protection for Voltages Exceeding the Supply Voltage RAIL-TO-RAIL OUTPUT CAPACITIVE LOAD AND STABILITY A class AB output stage with common-source transistors is used to achieve rail-to-rail output. For light resistive loads (> 50kΩ), the output voltage is typically a few millivolts from the supply rails. With moderate resistive loads (2kΩ to 50kΩ), the output can swing to within a few tens of millivolts from the supply rails and maintain high open-loop gain. See the typical characteristic curve Output Voltage Swing vs Output Current. OPA340 series op amps can drive a wide range of capacitive loads. However, all op amps under certain conditions may become unstable. Op amp configuration, gain, and load value are just a few of the factors to consider when determining stability. An op amp in unity gain configuration is most susceptible to the effects of capacitive load. The capacitive load reacts with the op amp’s output resistance, along with any additional load resistance, to create a pole in the small-signal response which degrades the phase margin. In unity gain, OPA340 series op amps perform well, with a pure capacitive load up to approximately 1000pF. Increasing gain enhances the amplifier’s ability to drive more capacitance. See the typical performance curve Small-Signal Overshoot vs Capacitive Load. 10 Submit Documentation Feedback Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 DRIVING A/D CONVERTERS One method of improving capacitive load drive in the unity gain configuration is to insert a 10Ω to 20Ω resistor in series with the output, as shown in Figure 26. This significantly reduces ringing with large capacitive loads. However, if there is a resistive load in parallel with the capacitive load, it creates a voltage divider introducing a dc error at the output and slightly reduces output swing. This error may be insignificant. For instance, with RL = 10kΩ and RS = 20Ω, there is only about a 0.2% error at the output. OPA340 series op amps are optimized for driving medium speed (up to 100kHz) sampling A/D converters. However, they also offer excellent performance for higher speed converters. The OPA340 series provides an effective means of buffering the A/D’s input capacitance and resulting charge injection while providing signal gain. Figure 27 and Figure 28 show the OPA340 driving an ADS7816. The ADS7816 is a 12-bit, micro-power sampling converter in the tiny MSOP-8 package. When used with the miniature package options of the OPA340 series, the combination is ideal for space-limited and low-power applications. For further information consult the ADS7816 data sheet. With the OPA340 in a noninverting configuration, an RC network at the amplifier’s output can be used to filter high-frequency noise in the signal (see Figure 27). In the inverting configuration, filtering may be accomplished with a capacitor across the feedback resistor (see Figure 28). V+ RS VOUT OPAx340 10W to 20W VIN RL CL Figure 26. Series Resistor in Unity-Gain Configuration Improves Capacitive Load Drive +5V 0.1mF 8 V+ 500W 0.1mF 1 VREF DCLOCK +In OPA340 ADS7816 12-Bit A/D 2 VIN -In 3300pF DOUT CS/SHDN 3 7 6 5 Serial Interface GND 4 VIN = 0V to 5V for 0V to 5V output. NOTE: A/D Input = 0 to VREF RC network filters high frequency noise. Figure 27. OPA340 in Noninverting Configuration Driving ADS7816 Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 Submit Documentation Feedback 11 OPA340 OPA2340 OPA4340 www.ti.com SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007 +5V 330pF 0.1mF 5kW 0.1mF 5kW VIN 1 VREF 8 V+ DCLOCK +In OPA340 ADS7816 12-Bit A/D 2 -In DOUT CS/SHDN 3 7 6 5 Serial Interface GND 4 VIN = 0V to -5V for 0V to 5V output. NOTE: A/D Input = 0 to VREF Figure 28. OPA340 in Inverting Configuration Driving ADS7816 Filters 160Hz to 2.4kHz +5V 10MW VIN 200pF 10MW 1/2 OPA2340 243kW 1.74MW 47pF 1/2 OPA2340 RL 220pF Figure 29. Speech Bandpass Filter 12 Submit Documentation Feedback Copyright © 1997–2007, Texas Instruments Incorporated Product Folder Link(s): OPA340 OPA2340 OPA4340 PACKAGE OPTION ADDENDUM www.ti.com 24-Jan-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Qty Drawing Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) (4) OPA2340EA/250 ACTIVE VSSOP DGK 8 250 Green (RoHS CU NIPDAUAG Level-2-260C-1 YEAR & no Sb/Br) A40A OPA2340EA/250G4 ACTIVE VSSOP DGK 8 250 Green (RoHS CU NIPDAUAG Level-2-260C-1 YEAR & no Sb/Br) A40A OPA2340EA/2K5 ACTIVE VSSOP DGK 8 2500 Green (RoHS CU NIPDAUAG Level-2-260C-1 YEAR & no Sb/Br) A40A OPA2340EA/2K5G4 ACTIVE VSSOP DGK 8 2500 Green (RoHS CU NIPDAUAG Level-2-260C-1 YEAR & no Sb/Br) A40A OPA2340PA ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA2340PA OPA2340PAG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type OPA2340PA OPA2340UA ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA2340UA/2K5 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA 2340UA OPA2340UA/2K5G4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA 2340UA OPA2340UAG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 2340UA OPA340NA/250 ACTIVE SOT-23 DBV 5 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 A40 OPA340NA/250G4 ACTIVE SOT-23 DBV 5 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 A40 OPA340NA/3K ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 A40 OPA340NA/3KG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 A40 OPA340PA ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type -40 to 85 OPA340PA OPA340PAG4 ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type -40 to 85 OPA340PA OPA340UA ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 340UA Addendum-Page 1 -40 to 85 OPA 2340UA Samples PACKAGE OPTION ADDENDUM www.ti.com 24-Jan-2013 Orderable Device Status (1) Package Type Package Pins Package Qty Drawing Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) (4) OPA340UA/2K5 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 340UA OPA340UA/2K5G4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 340UA OPA340UAG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 340UA OPA4340EA/250 ACTIVE SSOP DBQ 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 4340EA OPA4340EA/250G4 ACTIVE SSOP DBQ 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 4340EA OPA4340EA/2K5 ACTIVE SSOP DBQ 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 4340EA OPA4340EA/2K5G4 ACTIVE SSOP DBQ 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 OPA 4340EA OPA4340PA OBSOLETE PDIP N 14 TBD Call TI Call TI -40 to 85 OPA4340UA ACTIVE SOIC D 14 50 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 OPA4340UA OPA4340UA/2K5 ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 OPA4340UA OPA4340UA/2K5G4 ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 OPA4340UA OPA4340UAG4 ACTIVE SOIC D 14 50 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 OPA4340UA (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. Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 24-Jan-2013 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) Only one of markings shown within the brackets will appear on the physical device. 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OTHER QUALIFIED VERSIONS OF OPA340 : • Enhanced Product: OPA340-EP NOTE: Qualified Version Definitions: • Enhanced Product - Supports Defense, Aerospace and Medical Applications Addendum-Page 3 PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device OPA2340EA/250 Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 5.3 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.4 1.4 8.0 12.0 Q1 VSSOP DGK 8 250 330.0 12.4 OPA2340EA/2K5 VSSOP DGK 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 OPA340NA/250 SOT-23 DBV 5 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3 OPA340NA/3K SOT-23 DBV 5 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3 OPA340NA/3K SOT-23 DBV 5 3000 179.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 OPA4340EA/250 SSOP DBQ 16 250 180.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 OPA4340EA/2K5 SSOP DBQ 16 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 OPA4340UA/2K5 SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA2340EA/250 VSSOP DGK 8 250 366.0 364.0 50.0 OPA2340EA/2K5 VSSOP DGK 8 2500 366.0 364.0 50.0 OPA340NA/250 SOT-23 DBV 5 250 180.0 180.0 18.0 OPA340NA/3K SOT-23 DBV 5 3000 180.0 180.0 18.0 OPA340NA/3K SOT-23 DBV 5 3000 195.0 200.0 45.0 OPA4340EA/250 SSOP DBQ 16 250 210.0 185.0 35.0 OPA4340EA/2K5 SSOP DBQ 16 2500 367.0 367.0 35.0 OPA4340UA/2K5 SOIC D 14 2500 367.0 367.0 38.0 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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