OPA2348M/TR

OPA348/OPA2348/OPA4348 1MHz, 45µA, CMOS, Rail-to-Rail OPERATIONAL AMPLIFIERS DESCRIPTION FEATURES LOW IQ: 45µA typical LOW COST RAIL-TO-RAIL INPUT AND OUTPUT SINGLE SUPPLY: +2.1V to +5.5V INPUT BIAS CURRENT: 0.5pA MicroSIZE PACKAGES: SC70-5, SOT23-8 and TSSOP-14 ● HIGH SPEED:POWER WITH BANDWIDTH: 1MHz ● ● ● ● ● ● The OPA348 series amplifiers are single supply, low-power, CMOS op amps in micro packaging. Featuring an extended bandwidth of 1MHz, and a supply current of 45µA, the OPA348 series is useful for low-power applications on single supplies of 2.1V to 5.5V. Low supply current of 45µA, and an input bias current of 0.5pA, make the OPA348 series an optimal candidate for low-power, high-impedance applications such as smoke detectors and other sensors. The OPA348 is available in the miniature SC70-5, SOT23-5 and SO-8 packages. The OPA2348 is available in SOT23-8 and SO-8 packages, and the OPA4348 is offered in space-saving TSSOP-14 and SO-14 packages. The extended temperature range of –40°C to +125°C over all supply voltages offers additional design flexibility. APPLICATIONS ● ● ● ● ● PORTABLE EQUIPMENT BATTERY-POWERED EQUIPMENT SMOKE ALARMS CO DETECTORS MEDICAL INSTRUMENTATION Pin Assignment OPA348 OPA348 Out 1 V+ 5 +In 1 V– 2 +In 3 5 V+ V– 2 –In 4 –In 3 4 Out OPA4348 SC70-5 SOT23-5 OPA2348 Out A 1 –In A 2 +In A 3 V– 4 A B SOT23-8, SO-8 OPA348 Out A 1 –In A 2 A 8 V+ NC 1 8 NC 7 Out B –In 2 7 V+ 6 –In B +In 3 6 Out 5 +In B V– 4 5 NC 14 Out D 13 –In D D +In A 3 12 +In D V+ 4 11 V– +In B 5 10 +In C B C –In B 6 9 –In C Out B 7 8 Out C SO-8 TSSOP-14, SO-14 http://www.hgsemi.com.cn 1 2018 AUG OPA348/OPA2348/OPA4348 ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V– to V+ ................................................................... 7.5V Signal Input Terminals, Voltage(2) .................. (V–) – 0.5V to (V+) + 0.5V Current(2) .................................................... 10mA Output Short-Circuit(3) .............................................................. Continuous Operating Temperature .................................................. –65°C to +150°C Storage Temperature ..................................................... –65°C to +150°C Junction Temperature ...................................................................... 150°C Lead Temperature (soldering, 10s) ................................................. 300°C 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. NOTES: (1) 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. Functional operation of the device at these conditions, or beyond the specified operating conditions, is not implied. (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. http://www.hgsemi.com.cn 2 2018 AUG OPA348/OPA2348/OPA4348 ELECTRICAL CHARACTERISTICS: VS = 2.5V to 5.5V Boldface limits apply over the specified temperature range, TA = –40°C to +125°C At TA = +25°C, RL = 100kΩ connected to VS / 2 and VOUT = VS / 2, unless otherwise noted. OPA348 PARAMETER OFFSET VOLTAGE Input Offset Voltage Over Temperature Drift vs Power Supply Over Temperature Channel Separation, dc f = 1kHz CONDITION VOS dVOS/dT PSRR INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection Ratio over Temperature VS = 5V, VCM = (V–) + 0.8V OPEN-LOOP GAIN Open-Loop Voltage Gain over Temperature VCM CMRR (V–) – 0.2V < VCM < (V+) – 1.7V (V–) < VCM < (V+) – 1.7V VS = 5.5V, (V–) – 0.2V < VCM < (V+) + 0.2V VS = 5.5V, (V–) < VCM < (V+) (V–) – 0.2 70 66 60 56 POWER SUPPLY Specified Voltage Range Minimum Operating Voltage Quiescent Current (per amplifier) over Temperature TEMPERATURE RANGE Specified Range Operating Range Storage Range Thermal Resistance SOT23-5 Surface-Mount SOT23-8 Surface-Mount MSOP-8 Surface-Mount SO-8 Surface-Mount SO-14 Surface-Mount TSSOP-14 Surface-Mount SC70-5 Surface-Mount http://www.hgsemi.com.cn 1 5 6 mV mV µV/°C µV/V µV/V µV/V dB 175 300 (V+) + 0.2 V dB dB dB dB ±10 ±10 pA pA 82 71 1013 || 3 1013 || 6 Ω || pF Ω || pF 10 35 4 µVp-p nV/√Hz fA/√Hz 108 dB dB dB dB VCM < (V+) – 1.7V en in AOL OUTPUT Voltage Output Swing from Rail over Temperature FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time, 0.1% 0.01% Overload Recovery Time Total Harmonic Distortion + Noise UNITS ±0.5 ±0.5 IB IOS over Temperature over Temperature Short-Circuit Current Capacitive Load Drive MAX 4 60 VS = 2.5V to 5.5V, VCM < (V+) – 1.7V VS = 2.5V to 5.5V, VCM < (V+) – 1.7V INPUT IMPEDANCE Differential Common-Mode NOISE Input Voltage Noise, f = 0.1Hz to 10Hz Input Voltage Noise Density, f = 1kHz Input Current Noise Density, f = 1kHz TYP 0.2 134 over Temperature INPUT BIAS CURRENT Input Bias Current Input Offset Current MIN OPA2348 OPA4348 VS = 5V, RL = 100kΩ, 0.025V < VO < 4.975V VS = 5V, RL = 100kΩ, 0.025V < VO < 4.975V VS = 5V, RL = 5kΩ, 0.125V < VO < 4.875V VS = 5V, RL = 5kΩ, 0.125V < VO < 4.875V 94 90 90 88 RL = 100kΩ, AOL > 94dB RL = 100kΩ, AOL > 90dB RL = 5kΩ, AOL > 90dB RL = 5kΩ, AOL > 88dB 98 18 100 25 25 125 125 ±10 See Typical Characteristics ISC CLOAD mV mV mV mV mA CL = 100pF GBW SR tS THD+N VS IQ 1 0.5 5 7 1.6 0.0023 G = +1 VS = 5.5V, 2V Step, G = +1 VS = 5.5V, 2V Step, G = +1 VIN • Gain > VS VS = 5.5V, VO = 3Vp-p, G = +1, f = 1kHz 2.5 5.5 2.1 to 5.5 45 IO = 0 –40 –65 –65 θJA 200 150 150 150 100 100 250 3 MHz V/µs µs µs µs % 65 75 V V µA µA 125 150 150 °C °C °C °C/W °C/W °C/W °C/W °C/W °C/W °C/W 2018 AUG OPA348/OPA2348/OPA4348 TYPICAL CHARACTERISTICS At TA = +25°C, RL = 100kΩ connected to VS / 2 and VOUT = VS / 2, unless otherwise noted. OPEN-LOOP GAIN AND PHASE vs FREQUENCY PSRR AND CMRR vs FREQUENCY 140 100 0 80 –45 80 Gain 60 Phase –90 40 20 –135 PSRR, CMRR (dB) 100 Phase (°) Open-Loop Gain (dB) 120 CMRR 60 40 PSRR 20 0 –20 0.1 1 10 100 1k 10k 100k 1M 0 –180 10M 100 10 1k Frequency (Hz) MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 6 10k 100k 1M 10M Frequency (Hz) CHANNEL SEPARATION vs FREQUENCY 140 VS = 5.5V Channel Separation (dB) Output Voltage (Vp-p) 5 VS = 5V 4 3 2 VS = 2.5V 1 120 100 80 60 0 1k 10k 100k 1M 10 10M 100 1k QUIESCENT AND SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE 45 7 IQ 35 4 Output Voltage Swing (V) 10 Short-Circuit Current (mA) 55 +125°C +25°C 1.5 –40°C 1 Sourcing Current 0.5 0 –0.5 –1 Sinking Current –40°C –1.5 +25°C –2 25 3.5 4 4.5 5 0 5.5 5 10 15 20 Output Current (mA) Supply Voltage (V) http://www.hgsemi.com.cn +125°C –2.5 1 3 10M VS = ±2.5V 2 ISC 2.5 1M 2.5 13 2 100k OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 65 Quiescent Current (µA) 10k Frequency (Hz) Frequency (Hz) 4 2018 AUG OPA348/OPA2348/OPA4348 TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, RL = 100kΩ connected to VS / 2 and VOUT = VS / 2, unless otherwise noted. OPEN-LOOP GAIN AND PSRR vs TEMPERATURE COMMON-MODE REJECTION vs TEMPERATURE 130 100 Open-Loop Gain and Power Supply Rejection (dB) Common-Mode Rejection (dB) AOL, RL = 100kΩ 90 V– < VCM < (V+) – 1.7V 80 V– < VCM < V+ 70 60 120 AOL, RL = 5kΩ 110 100 90 80 PSRR 70 60 50 –75 –50 –25 0 25 50 75 100 125 –50 –75 150 –25 0 QUIESCENT AND SHORT-CIRCUIT CURRENT vs TEMPERATURE 14 ISC 55 12 45 10 IQ 35 8 25 6 15 4 –25 0 25 50 75 100 125 100 125 150 1k 100 10 1 0.1 150 –75 –50 –25 0 25 50 75 100 Temperature (°C) Temperature (°C) OFFSET VOLTAGE PRODUCTION DISTRIBUTION OFFSET VOLTAGE DRIFT MAGNITUDE PRODUCTION DISTRIBUTION 125 150 25 20 16 Percentage of Amplifiers (%) Typical production distribution of packaged units. 18 Percent of Amplifiers (%) 75 10k Input Bias Current (pA) Quiescent Current (µA) 65 –50 50 INPUT BIAS (IB) CURRENT vs TEMPERATURE 16 Short-Circuit Current (mA) 75 –75 25 Temperature (°C) Temperature (°C) 14 12 10 8 6 4 Typical production distribution of packaged units. 20 15 10 5 2 0 0 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 1 6 Offset Voltage (mV) http://www.hgsemi.com.cn 2 3 4 5 6 7 8 9 10 11 12 Offset Voltage Drift (µV/°C) 5 2018 AUG OPA348/OPA2348/OPA4348 TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, RL = 100kΩ connected to VS / 2 and VOUT = VS / 2, unless otherwise noted. SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE PERCENT OVERSHOOT vs LOAD CAPACITANCE 60 60 50 40 40 Overshoot (%) Small-Signal Overshoot (%) G = –1V/V, RFB = 100kΩ 50 30 G = +1V/V, RL = 100kΩ 20 20 G = ±5V/V, RFB = 100kΩ G = –1V/V, RFB = 5kΩ 10 10 0 0 10 100 1k 10k 10 100 1k 10k Load Capacitance (pF) SMALL-SIGNAL STEP RESPONSE LARGE-SIGNAL STEP RESPONSE G = +1V/V, RL = 100kΩ, CL = 100pF G = +1V/V, RL = 100kΩ, CL = 100pF 20mV/div 500mV/div Load Capacitance (pF) 2µs/div 10µs/div INPUT CURRENT AND VOLTAGE NOISE SPECTRAL DENSITY vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 1.000 1k 100 iN eN 100 10 10 1 1 10 100 1k 10k 0.100 0.010 0.001 10 100k 100 1k 10k 100k Frequency (Hz) Frequency (Hz) http://www.hgsemi.com.cn Total Harmonic Distortion + Noise (%) 1k Current Noise (fA√Hz) 10k Voltage Noise (nV/√Hz) 30 6 2018 AUG OPA348/OPA2348/OPA4348 APPLICATIONS INFORMATION on the high end. Within the 200mV transition region PSRR, CMRR, offset voltage, offset drift, and THD may be degraded compared to operation outside this region. OPA348 series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The OPA348 series features wide bandwidth and unity-gain stability with rail-to-rail input and output for increased dynamic range. Figure 1 shows the input and output waveforms for the OPA348 in unity-gain configuration. Operation is from a single +5V supply with a 100kΩ load connected to VS /2. The input is a 5Vp-p sinusoid. Output voltage is approximately 4.98Vp-p. OFFSET VOLTAGE vs FULL COMMON-MODE VOLTAGE RANGE 2 1.5 Offset Voltage (mV) Power-supply pins should be bypassed with 0.01µF ceramic capacitors. G = +1V/V, VS = +5V 1 0.5 0 –0.5 –1 V+ V– Output (Inverted on Scope) –1.5 5V 1V/div –2 –0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Common-Mode Voltage (V) FIGURE 2. Behavior of Typical Transition Region at Room Temperature. 0V 20µs/div RAIL-TO-RAIL INPUT The input common-mode range extends from (V–) – 0.2V to (V+) + 0.2V. For normal operation, inputs should be limited to this range. The absolute maximum input voltage is 500mV beyond the supplies. Inputs greater than the input commonmode range but less than the maximum input voltage, while not valid, will not cause any damage to the op amp. Unlike some other op amps, if input current is limited the inputs may go beyond the power supplies without phase inversion, as shown in Figure 3. FIGURE 1. The OPA348 Features Rail-to-Rail Input/Output. OPERATING VOLTAGE OPA348 series op amps are fully specified and tested from +2.5V to +5.5V. However, supply voltage may range from +2.1V to +5.5V. Parameters are tested over the specified supply range—a unique feature of the OPA348 series. In addition, all temperature specifications apply from –40°C to +125°C. Most behavior remains virtually unchanged throughout the full operating voltage range. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics. VIN COMMON-MODE VOLTAGE RANGE 5V VOUT 1V/div The input common-mode voltage range of the OPA348 series extends 200mV 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. The N-channel pair is active for input voltages close to the positive rail, typically (V+) – 1.2V to 300mV above the positive supply, while the P-channel pair is on for inputs from 300mV below the negative supply to approximately (V+) – 1.4V. There is a small transition region, typically (V+) – 1.4V to (V+) – 1.2V, in which both pairs are on. This 200mV transition region, shown in Figure 2, can vary ±300mV with process variation. Thus, the transition region (both stages on) can range from (V+) – 1.7V to (V+) – 1.5V on the low end, up to (V+) – 1.1V to (V+) – 0.9V http://www.hgsemi.com.cn G = +1V/V, VS = +5V 0V 10µs/div FIGURE 3. OPA348—No Phase Inversion with Inputs Greater than the Power-Supply Voltage. 7 2018 AUG OPA348/OPA2348/OPA4348 Normally, input currents are 0.5pA. However, large inputs (greater than 500mV beyond the supply rails) can cause excessive current to flow in or out of the input pins. Therefore, as well as keeping the input voltage below the maximum rating, it is also important to limit the input current to less than 10mA. This is easily accomplished with an input voltage resistor, as shown in Figure 4. In unity-gain inverter configuration, phase margin can be reduced by the reaction between the capacitance at the op amp input, and the gain setting resistors, thus degrading capacitive load drive. Best performance is achieved by using small valued resistors. For example, when driving a 500pF load, reducing the resistor values from 100kΩ to 5kΩ decreases overshoot from 55% to 13% (see the typical characteristic “Small-Signal Overshoot vs. Load Capacitance”). However, when large valued resistors cannot be avoided, a small (4pF to 6pF) capacitor, CFB, can be inserted in the feedback, as shown in Figure 6. This significantly reduces overshoot by compensating the effect of capacitance, CIN, which includes the amplifier's input capacitance and PC board parasitic capacitance. +5V IOVERLOAD 10mA max VOUT OPA348 VIN 5kΩ FIGURE 4. Input Current Protection for Voltages Exceeding the Supply Voltage. CFB RAIL-TO-RAIL OUTPUT RF A class AB output stage with common-source transistors is used to achieve rail-to-rail output. This output stage is capable of driving 5kΩ loads connected to any potential between V+ and ground. For light resistive loads (> 100kΩ), the output voltage can typically swing to within 18mV from supply rail. With moderate resistive loads (10kΩ to 50kΩ), the output voltage can typically swing to within 100mV of the supply rails while maintaining high open-loop gain (see the typical characteristic “Output Voltage Swing vs Output Current”). RI VIN VOUT OPA348 CIN CL FIGURE 6. Improving Capacitive Load Drive. CAPACITIVE LOAD AND STABILITY DRIVING A/D CONVERTERS The OPA348 in a unity-gain configuration can directly drive up to 250pF pure capacitive load. Increasing the gain enhances the amplifier’s ability to drive greater capacitive loads (see the typical characteristic “Small-Signal Overshoot vs Capacitive Load”). In unity-gain configurations, capacitive load drive can be improved by inserting a small (10Ω to 20Ω) resistor, RS, in series with the output, as shown in Figure 5. This significantly reduces ringing while maintaining DC performance for purely capacitive loads. However, if there is a resistive load in parallel with the capacitive load, a voltage divider is created, introducing a Direct Current (DC) error at the output and slightly reducing the output swing. The error introduced is proportional to the ratio RS /RL, and is generally negligible. The OPA348 series op amps are optimized for driving medium-speed sampling Analog-to-Digital Converters (ADCs). The OPA348 op amps buffer the ADCs input capacitance and resulting charge injection while providing signal gain. The OPA348 in a basic noninverting configuration driving the ADS7822, see Figure 7. The ADS7822 is a 12-bit, microPOWER sampling converter in the MSOP-8 package. When used with the low-power, miniature packages of the OPA348, the combination is ideal for space-limited, lowpower applications. In this configuration, an RC network at the ADC’s input can be used to provide for anti-aliasing filter and charge injection current. The OPA348 in noninverting configuration driving ADS7822 limited, low-power applications. In this configuration, an RC network at the ADC’s input can be used to provide for antialiasing filter and charge injection current. See Figure 8 for the OPA2348 driving an ADS7822 in a speech bandpass filtered data acquisition system. This small, low-cost solution provides the necessary amplification and signal conditioning to interface directly with an electret microphone. This circuit will operate with VS = 2.7V to 5V with less than 250µA typical quiescent current. V+ RS VOUT OPA348 VIN 10Ω to 20Ω RL CL FIGURE 5. Series Resistor in Unity-Gain Buffer Configuration Improves Capacitive Load Drive. http://www.hgsemi.com.cn 8 2018 AUG OPA348/OPA2348/OPA4348 +5V 0.1µF 0.1µF 1 VREF 8 V+ DCLOCK 500Ω +In OPA348 ADS7822 12-Bit A/D 2 VIN –In CS/SHDN 3 3300pF DOUT 7 6 Serial Interface 5 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 7. OPA348 in Noninverting Configuration Driving ADS7822. V+ = +2.7V to 5V Passband 300Hz to 3kHz R9 510kΩ R1 1.5kΩ R2 1MΩ R4 20kΩ C3 33pF C1 1000pF 1/2 OPA2348 Electret Microphone(1) R3 1MΩ R6 100kΩ R7 51kΩ R8 150kΩ VREF 1 8 V+ 7 C2 1000pF 1/2 OPA2348 +IN ADS7822 6 12-Bit A/D 5 2 –IN DCLOCK DOUT CS/SHDN Serial Interface 3 4 NOTE: (1) Electret microphone powered by R1. R5 20kΩ G = 100 GND FIGURE 8. OPA2348 as a Speech Bandpass Filtered Data Acquisition System. http://www.hgsemi.com.cn 9 2018 AUG OPA348/OPA2348/OPA4348 Important statement: Huaguan Semiconductor Co,Ltd. reserves the right to change the products and services provided without notice. Customers should obtain the latest relevant information before ordering, and verify the timeliness and accuracy of this information. Customers are responsible for complying with safety standards and taking safety measures when using our products for system design and machine manufacturing to avoid potential risks that may result in personal injury or property damage. Our products are not licensed for applications in life support, military, aerospace, etc., so we do not bear the consequences of the application of these products in these fields. Our documentation is only permitted to be copied without any tampering with the content, so we do not accept any responsibility or liability for the altered documents. http://www.hgsemi.com.cn 10 2018 AUG