OPA4340EA

® OPA OPA 340 OPA 2340 434 0 OPA 434 OPA340 OPA2340 OPA4340 0 SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series FEATURES q q q q q q q q 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 APPLICATIONS q DRIVING A/D CONVERTERS q PCMCIA CARDS q DATA ACQUISITION q PROCESS CONTROL q AUDIO PROCESSING q COMMUNICATIONS q ACTIVE FILTERS q TEST EQUIPMENT 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. The single (OPA340) packages are the tiny 5-lead SOT-23-5 surface mount, SO-8 surface mount, and 8-pin DIP. The dual (OPA2340) comes in the miniature MSOP-8 surface mount, SO-8 surface mount, and 8-pin DIP packages. The quad (OPA4340) packages are the space-saving SSOP-16 surface mount, SO-14 surface mount, and the 14-pin DIP. All are specified from –40° C to +85°C and operate from –55°C to +125 °C. A SPICE macromodel is available for design analysis. OPA4340 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 converters. They are also well suited for general purpose and audio applications as well as providing I/V conversion at the output of D/A converters. Single, dual, and quad versions have identical specifications for design flexibility. The OPA340 series operates 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 OPA340 NC –In +In V– 1 2 3 4 8-Pin DIP, SO-8 8 7 6 5 NC V+ Output NC Out A –In A 1 2 A D 3 4 5 B C 6 7 8 SSOP-16 16 15 14 13 12 11 10 9 Out D –In D +In D –V +In C –In C Out C NC OPA2340 1 2 3 4 A B 8 7 6 5 V+ Out B –In B +In B +In A +V OPA340 Out 1 V– 2 +In 3 SOT-23-5 4 –In 5 V+ Out A –In A +In A V– +In B –In B Out B NC 8-Pin DIP, SO-8, MSOP-8 International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111 Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 ® © 1997 Burr-Brown Corporation PDS-1404C 1 Printed in U.S.A. December, 1997 OPA340/2340/4340 SPECIFICATIONS: VS = 2.7V to 5V At TA = +25°C, RL = 10kΩ connected to VS/2 and VOUT = VS/2, unless otherwise noted. Boldface limits apply over the specified temperature range, TA = –40°C to +85°C. VS = 5V. OPA340NA, PA, UA OPA2340EA, PA, UA OPA4340EA, PA, UA PARAMETER OFFSET VOLTAGE Input Offset Voltage vs Temperature vs Power Supply T A = –40°C to +85°C Channel Separation, dc INPUT BIAS CURRENT Input Bias Current TA = –40°C to +85°C Input Offset Current NOISE Input Voltage Noise, f = 0.1 to 50kHz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection Ratio VOS dVOS/dT PSRR CONDITION VS = 5V VS = 2.7V to 5.5V, VCM = 0V VS = 2.7V to 5.5V, VCM = 0V MIN TYP(1) ±150 ±2.5 30 0.2 IB IOS ±0.2 ±0.2 8 25 3 –0.3 80 70 66 (V+) +0.3 92 84 80 1013 || 3 1013 || 6 AOL RL = 100kΩ , 5mV < VO < (V+) –5mV RL = 100kΩ , 5mV < VO < (V+) –5mV RL = 10kΩ, 50mV < VO < (V+) –50mV RL = 10kΩ, 50mV < VO < (V+) –50mV RL = 2kΩ, 200mV < VO < (V+) –200mV RL = 2kΩ, 200mV < VO < (V+) –200mV G=1 VS = 5V, G = 1, CL = 100pF VS = 5V, 2V Step, CL = 100pF VS = 5V, 2V Step, CL = 100pF VIN • G = VS VS = 5V, VO = 3Vp-p(2), G = 1, f = 1kHz RL = 100kΩ, AOL ≥ 106dB RL = 100kΩ, AOL ≥ 106dB RL = 10kΩ, AOL ≥ 100dB RL = 10kΩ, AOL ≥ 100dB RL = 2kΩ, AOL ≥ 94dB RL = 2kΩ, AOL ≥ 94dB ISC CLOAD VS IQ IO = 0, VS = +5V IO = 0, VS = +5V –40 –55 –55 2.7 2.5 to 5.5 750 106 106 100 100 94 94 124 120 114 ±10 ±60 ±10 MAX ±500 120 120 UNITS µV µV/°C µV/V µV/V µV/V pA pA pA µVrms nV/√Hz fA/√Hz V dB dB dB Ω || pF Ω || pF dB dB dB dB dB dB MHz V/µs µs µs µs % 5 5 50 50 200 200 mV mV mV mV mV mV mA en in VCM CMRR –0.3V < VCM < (V+) –1.8V VS = 5V, –0.3V < VCM < 5.3V VS = 2.7V, –0.3V < VCM < 3V INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain TA = –40°C to +85°C TA = –40°C to +85°C TA = –40°C to +85°C FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time, 0.1% 0.01% Overload Recovery Time Total Harmonic Distortion + Noise OUTPUT Voltage Output Swing from Rail(3) TA = –40°C to +85°C TA = –40°C to +85°C TA = –40°C to +85°C Short-Circuit Current Capacitive Load Drive POWER SUPPLY Specified Voltage Range Operating Voltage Range Quiescent Current (per amplifier) TA = –40°C to +85°C TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance SOT-23-5 Surface Mount MSOP-8 Surface Mount SO-8 Surface Mount 8-Pin DIP SSOP-16 Surface Mount SO-14 Surface Mount 14-Pin DIP GBW SR THD+N 5.5 6 1 1.6 0.2 0.0007 1 10 40 ±50 See Typical Curve 5 950 1100 +85 +125 +125 200 150 150 100 100 100 80 V V µA µA °C °C °C °C/W °C/W °C/W °C/W °C/W °C/W °C/W θJA NOTES: (1) VS = +5V. (2) V OUT = 0.25V to 3.25V. (3) Output voltage swings are measured between the output and power supply rails. ® OPA340/2340/4340 2 PIN CONFIGURATIONS Top View SOIC/DIP ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Burr-Brown 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. OPA4340 Out A –In A +In A V+ +In B –In B Out B 1 2 A 3 4 5 B 6 7 C 9 8 –In C Out C D 12 11 10 +In D V– +In C 14 13 Out D –In D ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage ................................................................................... 5.5V Signal Input Terminals, Voltage (2) .................... (V–) –0.5V to (V+) +0.5V Current(2) .................................................... 10mA Output Short-Circuit(3) .............................................................. Continuous Operating Temperature ................................................. –55°C to +125°C Storage Temperature ..................................................... –55°C to +125°C Junction Temperature ...................................................................... 150°C Lead Temperature (soldering, 10s) ................................................. 300°C NOTES: (1) Stresses above these ratings may cause permanent damage. (2) 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 currentlimited to 10mA or less. (3) Short-circuit to ground, one amplifier per package. PACKAGE/ORDERING INFORMATION PACKAGE DRAWING NUMBER(1) SPECIFIED TEMPERATURE RANGE –40°C to +85°C PACKAGE MARKING ORDERING NUMBER(2) TRANSPORT MEDIA PRODUCT Single OPA340NA PACKAGE 5-Lead SOT-23-5 331 A40 " OPA340PA OPA340UA Dual OPA2340EA " OPA2340PA OPA2340UA Quad OPA4340EA " OPA4340PA OPA4340UA " 8-Pin DIP SO-8 Surface-Mount " 006 182 " –40°C to +85°C –40°C to +85°C –40°C to +85°C " –40°C to +85°C –40°C to +85°C –40°C to +85°C " –40°C to +85°C –40°C to +85°C " OPA340PA OPA340UA OPA340NA-250 OPA340NA-3K OPA340PA OPA340UA Tape and Reel Tape and Reel Rails Rails (3) MSOP-8 Surface-Mount " 8-Pin DIP SO-8 Surface-Mount 337 " 006 182 A40A " OPA2340PA OPA2340UA OPA2340EA-250 OPA2340EA-2500 OPA2340PA OPA2340UA Tape and Reel Tape and Reel Rails Rails (3) SSOP-16 Surface-Mount " 14-Pin DIP SO-14 Surface Mount 322 " 010 235 OPA4340EA " OPA4340PA OPA4340UA OPA4340EA-250 OPA4340EA-2500 OPA4340PA OPA4340UA Tape and Reel Tape and Reel Rails Rails (3) NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) 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. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book. (3) SO-8 and SO-14 models also available in Tape and Reel. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® 3 OPA340/2340/4340 TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. OPEN-LOOP GAIN/PHASE vs FREQUENCY 160 140 120 –45 0 POWER SUPPLY and COMMON-MODE REJECTION vs FREQUENCY 100 PSRR 80 100 80 60 40 20 0 –20 0.1 1 10 100 1k 10k 100k 1M 10M Frequency (Hz) –180 –135 –90 PSRR, CMRR (dB) Voltage Gain (dB) Phase (°) 60 40 CMRR 20 0 1 10 100 1k Frequency (Hz) 10k 100k 1M INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY 10k Current Noise 1k 140 CHANNEL SEPARATION vs FREQUENCY Voltage Noise (nV√Hz) Voltage Noise 100 10 Current Noise (fA√Hz) 1k 100 Channel Separation (dB) 130 120 10 1 110 G = 1, All Channels 1 1 10 100 1k Frequency (Hz) 10k 100k 1M 0.1 100 10 100 1k Frequency (Hz) 10k 100k TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 0.1 RL = 600 Output Resistance (Ω) 5k CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY G = 100 4k G = 10 3k RL = 2k 0.01 THD+N (%) G = 10 RL = 10k RL = 600 RL = 2k 2k 0.001 G=1 RL = 10k G=1 1k 0.0001 20 100 1k Frequency (Hz) 10k 20k 0 10 100 1k 10k 100k 1M 10M Frequency (Hz) ® OPA340/2340/4340 4 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = +5V, and RL = 10k Ω connected to VS/2, unless otherwise noted. OPEN-LOOP GAIN AND POWER SUPPLY REJECTION vs TEMPERATURE 130 RL = 100kΩ 100 90 COMMON-MODE REJECTION vs TEMPERATURE 120 AOL, PSRR (dB) AOL RL = 10kΩ 80 110 RL = 2kΩ CMRR (dB) 70 60 50 40 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 –75 –50 –25 0 25 50 75 100 125 100 PSRR 90 80 –75 –50 –25 0 25 50 75 100 125 Temperature (°C) Temperature (°C) QUIESCENT CURRENT vs TEMPERATURE 1000 Per Amplifier Quiescent Current (µA) Quiescent Current (µA) QUIESCENT CURRENT vs SUPPLY VOLTAGE 800 Per Amplifier 750 900 800 700 700 600 650 500 –75 –50 –25 0 25 50 75 100 125 Temperature (°C) 600 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) SHORT-CIRCUIT CURRENT vs TEMPERATURE 100 90 Short-Circuit Current (mA) 80 70 60 50 40 30 20 10 0 –75 –50 –25 0 25 50 75 100 125 Temperature (°C) 30 2.0 SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE 60 –ISC Short-Circuit Current (mA) –ISC 50 +ISC +ISC 40 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) ® 5 OPA340/2340/4340 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. INPUT BIAS CURRENT vs TEMPERATURE 1k 1.0 0.8 Input Bias Current (pA) Input Bias Current (pA) 100 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 0.1 –75 –50 –25 0 25 50 Temperature (°C) 75 100 125 –1.0 –1 0 INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE 10 1 1 2 3 4 5 6 Common-Mode Voltage (V) OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 5 +125°C 4 Output Voltage (V) MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 6 VS = 5.5V Maximum output voltage without slew rate-induced distortion. +25°C –55°C 5 Output Voltage (Vp-p) 4 3 2 1 0 100k VS = 2.7V 3 2 1 +125°C +25°C –55°C 0 0 ±10 ±20 ±30 ±40 ±50 ±60 ±70 ±80 ±90 ±100 Output Current (mA) 1M Frequency (Hz) 10M OFFSET VOLTAGE PRODUCTION DISTRIBUTION 18 16 Percent of Amplifiers (%) 14 12 10 8 6 4 2 0 –500 –400 –300 –200 –100 0 100 200 300 400 500 0 0 1 2 Typical production distribution of packaged units. 25 OFFSET VOLTAGE DRIFT MAGNITUDE PRODUCTION DISTRIBUTION Typical production distribution of packaged units. Percent of Amplifiers (%) 20 15 10 5 3 4 5 6 7 8 9 10 11 12 13 15 Offset Voltage Drift (µV/°C) Offset Voltage (µV) ® OPA340/2340/4340 6 TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = +5V, and RL = 10k Ω connected to VS/2, unless otherwise noted. SMALL-SIGNAL STEP RESPONSE CL = 100pF LARGE-SIGNAL STEP RESPONSE CL = 100pF 50mV/div 1µs/div 1V/div 1µs/div SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE 60 50 Overshoot (%) SETTLING TIME vs CLOSED-LOOP GAIN 100 G = –1 G = +1 Settling Time (µs) 0.01% 10 40 30 20 10 0 100 G = –5 G = +5 See text for reducing overshoot. 1 0.1% 0.1 1000 Load Capacitance (pF) 10k 1 10 100 1000 Closed-Loop Gain (V/V) ® 7 OPA340/2340/4340 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 1 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 5Vp-p sinusoid. Output voltage is approximately 4.98Vp-p. VS = +5, G = +1, RL = 10kΩ Power supply pins should be bypassed with 0.01µF ceramic capacitors. 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 guaranteed over the specified supply range—a unique feature of the OPA340 series. In addition, many specifications apply 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 performance curves. 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 (see Figure 2). 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. 5 VIN 2V/div 5 VOUT 0 FIGURE 1. Rail-to-Rail Input and Output. V+ Reference Current VIN+ VIN– VBIAS1 Class AB Control Circuitry VO VBIAS2 V– (Ground) FIGURE 2. Simplified Schematic. ® OPA340/2340/4340 8 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 commonmode 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. 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 3. Many input signals are inherently current-limited to less than 10mA, therefore, a limiting resistor is not required. CAPACITIVE LOAD AND STABILITY 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 the 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.” 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 4. 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. DRIVING A/D CONVERTERS 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. Figures 5 and 6 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 (Figure 5). In the inverting configuration, filtering may be accomplished with a capacitor across the feedback resistor (Figure 6). V+ IOVERLOAD 10mA max VIN 5kΩ OPAx340 VOUT FIGURE 3. Input Current Protection for Voltages Exceeding the Supply Voltage. RAIL-TO-RAIL OUTPUT 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 performanc curve “Output Voltage Swing vs Output Current.” V+ RS OPAx340 VIN 10Ω to 20Ω RL CL VOUT FIGURE 4. Series Resistor in Unity-Gain Configuration Improves Capacitive Load Drive. ® 9 OPA340/2340/4340 +5V 0.1µF 0.1µF 8 V+ 500Ω OPA340 VIN 3300pF VIN = 0V to 5V for 0V to 5V output. +In 2 –In 3 GND 4 ADS7816 12-Bit A/D 1 VREF DCLOCK DOUT CS/SHDN 7 6 5 Serial Interface NOTE: A/D Input = 0 to VREF RC network filters high frequency noise. FIGURE 5. OPA340 in Noninverting Configuration Driving ADS7816. +5V 330pF 0.1µF 5kΩ VIN 5kΩ 8 V+ +In OPA340 2 –In 3 GND 4 ADS7816 12-Bit A/D 1 VREF DCLOCK DOUT CS/SHDN 7 6 5 Serial Interface 0.1µF VIN = 0V to –5V for 0V to 5V output. NOTE: A/D Input = 0 to VREF FIGURE 6. OPA340 in Inverting Configuration Driving ADS7816. +5V Filters 160Hz to 2.4kHz 10MΩ VIN 200pF 10MΩ 1/2 OPA2340 243kΩ 1.74MΩ 47pF 1/2 OPA2340 RL 220pF FIGURE 7. Speech Bandpass Filter. ® OPA340/2340/4340 10