OPA343 OPA2343 OPA4343 ® OPA 234 3 OPA 434 3 SINGLE-SUPPLY, RAIL-TO-RAIL OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series FEATURES APPLICATIONS ● ● ● ● ● ● ● 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: 850µA/channel ● SINGLE, DUAL, AND QUAD ● DRIVING A/D CONVERTERS ● PCMCIA CARDS ● DATA ACQUISITION ● PROCESS CONTROL ● AUDIO PROCESSING ● COMMUNICATIONS ● ACTIVE FILTERS ● TEST EQUIPMENT DESCRIPTION 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 850µA. Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction. The single (OPA343) packages are the tiny 5-lead SOT-23-5 surface mount and SO-8 surface mount. The dual (OPA2343) comes in the miniature MSOP-8 surface mount and SO-8 surface mount. The quad (OPA4343) packages are the space-saving SSOP-16 surface mount and SO-14 surface mount. 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. OPA343 series rail-to-rail CMOS operational amplifiers are designed for low cost, miniature applications. They are optimized for low voltage, single supply operation. Rail-to-rail input/output and high speed operation make them ideal for driving sampling analogto-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 OPA343 series operates on a single supply as low as 2.5V with an input common-mode voltage range that extends 500mV beyond the supply rails. Output voltage OPA343 OPA4343 NC 1 8 NC –In 2 7 V+ Out A 1 16 Out D –In A 2 15 –In D +In 3 6 Output V– 4 5 NC OPA343 Out 1 SO-8 5 V+ V– 2 4 +In 3 –In SOT-23-5 A OPA2343 Out A 1 –In A 2 +In A 3 V– 4 A B SO-8, MSOP-8 D +In A 3 14 +In D +V 4 13 –V +In B 5 12 +In C 8 V+ 7 Out B –In B 6 11 –In C 6 –In B Out B 7 10 Out C 5 +In B NC 8 9 NC B C SSOP-16 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 ® © 1998 Burr-Brown Corporation PDS-1439B 1 Printed4343 in U.S.A. April, 1998 OPA343, 2343, 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. OPA343NA, UA OPA2343EA, UA OPA4343EA, UA PARAMETER CONDITION OFFSET VOLTAGE Input Offset Voltage vs Temperature vs Power Supply TA = –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 MIN VS = 5V VS = 2.7V to 5.5V, VCM = 0V VS = 2.7V to 5.5V, VCM = 0V mV µV/°C µV/V µV/V µV/V ±0.2 en in 8 25 3 VCM CMRR AOL GBW SR THD+N 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 SSOP-16 Surface Mount SO-14 Surface Mount ±8 IOS OUTPUT Voltage Output Swing from Rail(3) TA = –40°C to +85°C POWER SUPPLY Specified Voltage Range Operating Voltage Range Quiescent Current (per amplifier) TA = –40°C to +85°C ±2 ±3 40 ±0.2 TA = –40°C to +85°C TA = –40°C to +85°C Short-Circuit Current Capacitive Load Drive UNITS IB 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 MAX 200 200 0.2 –0.3V < VCM < (V+) –1.8V VS = 5V, –0.3V < VCM < 5.3V VS = 2.7V, –0.3V < VCM < 3V –0.3 74 60 54 INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain TA = –40°C to +85°C TYP(1) 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 100 100 100 100 92 92 IQ µVrms nV/√Hz fA/√Hz (V+) +0.3 V dB dB dB 1013 || 3 1013 || 6 Ω || pF Ω || pF 120 dB dB dB dB dB dB 117 110 5.5 6 1 1.6 0.2 0.0007 RL = 100kΩ, AOL ≥ 100dB RL = 100kΩ, AOL ≥ 100dB RL = 10kΩ, AOL ≥ 100dB RL = 10kΩ, AOL ≥ 100dB RL = 2kΩ, AOL ≥ 92dB RL = 2kΩ, AOL ≥ 92dB 1 10 40 MHz V/µs µs µs µs % 5 5 50 50 200 200 mV mV mV mV mV mV mA 5 1.25 1.4 V V mA mA +85 +125 +125 °C °C °C ±50 See Typical Curve ISC CLOAD 2.7 2.5 to 5.5 0.85 IO = 0, VS = +5V IO = 0, VS = +5V –40 –55 –55 θJA 200 150 150 100 100 NOTES: (1) VS = +5V. (2) VOUT = 0.25V to 3.25V. (3) Output voltage swings are measured between the output and power supply rails. ® OPA343, 2343, 4343 2 pA pA pA 92 75 70 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 VS ±10 ±60 ±10 °C/W °C/W °C/W °C/W °C/W ELECTROSTATIC DISCHARGE SENSITIVITY PIN CONFIGURATIONS Top View SOIC OPA4343 Out A 1 14 Out D –In A 2 13 –In D +In A 3 12 +In D V+ 4 11 V– +In B 5 10 +In C A 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. D B 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. C –In B 6 9 –In C Out B 7 8 Out C 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. Exposure to absolute maximum conditions for extended periods may degrade device reliability. (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 current-limited to 10mA or less. (3) Short-circuit to ground, one amplifier per package. PACKAGE/ORDERING INFORMATION PRODUCT PACKAGE PACKAGE DRAWING NUMBER(1) Single OPA343NA 5-Lead SOT-23-5 331 –40°C to +85°C B43 " " " " " OPA343UA SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(2) TRANSPORT MEDIA OPA343NA/250 OPA343NA /3K OPA343UA OPA343UA /2K5 Tape and Reel Tape and Reel Rails Tape and Reel OPA2343EA /250 OPA2343EA/2K5 OPA2343UA OPA2343UA/2K5 Tape and Reel Tape and Reel Rails Tape and Reel OPA4343EA /250 OPA4343EA /2K5 OPA4343UA OPA4343UA /2K5 Tape and Reel Tape and Reel Rails Tape and Reel SO-8 Surface-Mount 182 –40°C to +85°C OPA343UA " " " " " Dual OPA2343EA MSOP-8 Surface-Mount 337 –40°C to +85°C C43 " " " " " OPA2343UA " SO-8 Surface-Mount 182 –40°C to +85°C OPA2343UA " " " " SSOP-16 Surface-Mount 322 –40°C to +85°C OPA4343EA " " " " SO-14 Surface Mount 235 –40°C to +85°C OPA4343UA " " " " Quad OPA4343EA " OPA4343UA " 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 a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “OPA2343EA/2K5” will get a single 2500 piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book. 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 OPA343, 2343, 4343 TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted. POWER SUPPLY and COMMON-MODE REJECTION vs FREQUENCY OPEN-LOOP GAIN/PHASE vs FREQUENCY 160 0 100 PSRR 140 80 100 80 –90 60 40 –135 20 PSRR, CMRR (dB) –45 Phase (°) Voltage Gain (dB) 120 60 40 CMRR VCM = –0.3V to (V+) –1.8V 20 0 –180 –20 0 0.1 10 1 100 1k 10k 100k 1M 10M 1 10 100 Frequency (Hz) 1k 10k 100k 1M Frequency (Hz) INPUT VOLTAGE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY CHANNEL SEPARATION vs FREQUENCY 140 1k 10k 10 100 1 10 Channel Separation (dB) 100 Voltage Noise Current Noise (fA√Hz) Voltage Noise (nV√Hz) Current Noise 1k 1 10 100 1k 10k 100k 120 Dual and quad devices. G = 1, all channels. Quad measured channel A to D or B to C—other combinations yield improved rejection. 110 100 0.1 1 130 10 1M 100 1k 100k Frequency (Hz) TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY 0.1 5k G = 100 RL = 600 4k 0.01 Output Resistance (Ω) RL = 2k THD+N (%) 10k Frequency (Hz) G = 10 RL = 10k RL = 600 0.001 RL = 2k G=1 RL = 10k 0.0001 G = 10 3k 2k G=1 1k 0 20 100 1k 10k 10 20k ® OPA343, 2343, 4343 100 1k 10k 100k Frequency (Hz) Frequency (Hz) 4 1M 10M TYPICAL PERFORMANCE CURVES (CONT) 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 COMMON-MODE REJECTION vs TEMPERATURE 100 130 AOL 110 RL = 100kΩ 90 RL = 10kΩ 80 CMRR (dB) AOL, PSRR (dB) 120 RL = 2kΩ 100 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 –25 0 25 50 75 100 –75 125 –50 –25 50 75 100 125 900 Per Amplifier Per Amplifier Quiescent Current (µA) 1000 900 800 700 600 850 800 750 700 –75 –50 –25 0 25 50 75 100 2.0 125 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) Temperature (°C) SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE SHORT-CIRCUIT CURRENT vs TEMPERATURE 60 100 –ISC 90 Short-Circuit Current (mA) Quiescent Current (µA) 25 QUIESCENT CURRENT vs SUPPLY VOLTAGE QUIESCENT CURRENT vs TEMPERATURE 1100 Short-Circuit Current (mA) 0 Temperature (°C) 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 2.0 125 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) Temperature (°C) ® 5 OPA343, 2343, 4343 TYPICAL PERFORMANCE CURVES (CONT) 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 1k 1.0 0.6 100 Input Bias Current (pA) Input Bias Current (pA) 0.8 10 1 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0.1 –75 –50 –25 0 25 50 Temperature (°C) 75 100 125 –1 OUTPUT VOLTAGE SWING vs OUTPUT CURRENT –55°C Output Voltage (Vp-p) Output Voltage (V) 3 2 +125°C ±10 ±20 ±30 ±40 ±50 ±60 VS = 5.5V 6 4 VS = 2.7V 3 2 1M 10M Output Current (mA) Frequency (Hz) OFFSET VOLTAGE PRODUCTION DISTRIBUTION OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION 25 Percent of Amplifiers (%) Typical production distribution of packaged units. 25 5 Maximum output voltage without slew rate-induced distortion. 0 100k ±70 ±80 ±90 ±100 30 Percent of Amplifiers (%) 4 1 –55°C +25°C 0 0 3 5 4 1 2 MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 6 +25°C 1 Common-Mode Voltage (V) 5 +125°C 0 20 15 10 5 0 Typical production distribution of packaged units. 20 15 10 5 0 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 0 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Offset Voltage Drift (µV/°C) Offset Voltage (mV) ® OPA343, 2343, 4343 6 TYPICAL PERFORMANCE CURVES (CONT) 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 1µs/div 1µs/div SETTLING TIME vs CLOSED-LOOP GAIN SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE 100 60 G = –1 0.01% Settling Time (µs) Overshoot (%) 50 G = +1 40 30 G = ±5 20 10 0.1% 1 See text for reducing overshoot. 10 0.1 0 100 1000 10k 1 10 100 1000 Closed-Loop Gain (V/V) Load Capacitance (pF) ® 7 OPA343, 2343, 4343 APPLICATIONS INFORMATION Power supply pins should be bypassed with 0.01µF ceramic capacitors. OPA343 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. OPERATING VOLTAGE OPA343 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 OPA343 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 and output swing significantly increases dynamic range, especially in low supply applications. Figure 1 shows the input and output waveforms for the OPA343 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. RAIL-TO-RAIL INPUT The input common-mode voltage range of the OPA343 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. The P-channel pair is on for inputs from 500mV below the negative supply to approximately (V+) –1.3V. VS = +5, G = +1, RL = 10kΩ 5 2V/div VIN There is a small transition region, typically (V+) –1.5V to (V+) –1.1V, in which both input 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. Within the 400mV transition region PSRR, CMRR, offset voltage, offset drift, and THD may be degraded compared to operation outside this region. 5 VOUT 0 FIGURE 1. Rail-to-Rail Input and Output. V+ Reference Current VIN+ VIN– VBIAS1 VBIAS2 V– (Ground) FIGURE 2. Simplified Schematic. ® OPA343, 2343, 4343 8 Class AB Control Circuitry VO 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. 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, OPA343 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, RS creates a voltage divider. This introduces 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. V+ IOVERLOAD 10mA max VOUT OPAx343 VIN 5kΩ DRIVING A/D CONVERTERS FIGURE 3. Input Current Protection for Voltages Exceeding the Supply Voltage. OPA343 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 OPA343 series provides an effective means of buffering the A/D’s input capacitance and resulting charge injection while providing signal gain. For applications requiring high accuracy, the OPA340 series is recommended. 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.” Figures 5 and 6 show the OPA343 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 OPA343 series, the combination is ideal for space-limited and low power applications. For further information consult the ADS7816 data sheet. CAPACITIVE LOAD AND STABILITY With the OPA343 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). OPA343 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 V+ RS VOUT OPAx343 VIN 10Ω to 20Ω RL CL FIGURE 4. Series Resistor in Unity-Gain Configuration Improves Capacitive Load Drive. ® 9 OPA343, 2343, 4343 +5V For improved accuracy use OPA340. 0.1µF 0.1µF 1 VREF 8 V+ 7 DCLOCK 500Ω +In OPA343 ADS7816 12-Bit A/D 2 VIN –In Serial Interface 5 CS/SHDN 3 3300pF 6 DOUT 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 5. OPA343 in Noninverting Configuration Driving ADS7816. +5V 330pF 0.1µF For improved accuracy use OPA340. 5kΩ 0.1µF 5kΩ VIN 1 VREF 8 V+ DCLOCK +In OPA343 ADS7816 12-Bit A/D 2 DOUT –In CS/SHDN 3 7 6 Serial Interface 5 GND 4 VIN = 0V to –5V for 0V to 5V output. NOTE: A/D Input = 0 to VREF FIGURE 6. OPA343 in Inverting Configuration Driving ADS7816. Filters 160Hz to 2.4kHz +5V 10MΩ VIN 200pF 10MΩ 1/2 OPA2343 1.74MΩ 243kΩ 47pF 1/2 OPA2343 RL 220pF FIGURE 7. Speech Bandpass Filter. <1pF (prevents gain peaking) 10MΩ +V λ OPA343 FIGURE 8. Transimpedance Amplifier. ® OPA343, 2343, 4343 10 VO