OPA4364AQDRQ1

OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 1.8-V, 7-MHz, 90-dB CMRR, SINGLE-SUPPLY, RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER FEATURES • • • • • • • • Qualified for Automotive Applications 1.8-V Operation Bandwidth: 7 MHz CMRR: 90 dB (Typ) Slew Rate: 5 V/µs Low Offset: 500 µV (Max) Quiescent Current: 750 µA/Channel (Max) Shutdown Mode: VS 0.8 µs Total harmonic distortion + noise CL = 100 pF, VS = 5 V, G = 1, f = 20 Hz to 20 kHz 0.002% ts THD+N Settling time Output From rail Voltage output swing Over temperature RL = 10 kΩ RL = 10 kΩ 10 20 VOL 20 VOH 40 ISC Short-circuit current See Typical Characteristics CLOAD Capacitive load drive See Typical Characteristics mV mV Power Supply VS Specified voltage 1.8 Operating voltage IQ Quiescent current (per amplifier) 5.5 V µA 1.8 to 5.5 V VS = 1.8 V 650 750 VS = 3.6 V 850 1000 µA VS = 5.5 V 1.1 1.4 mA Submit Documentation Feedback 3 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 ELECTRICAL CHARACTERISTICS: VS = 1.8 V to 5.5 V (continued) Boldface limits apply over the specified temperature range, TA = –40°C to 125°C, TA = 25°C, RL = 10 kΩ connected to VS/2, and VOUT = VS/2, VCM = VS/2 (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Temperature Range θJA 4 Specified range –40 125 °C Storage range –65 150 °C Thermal resistance SO-8 150 SO-14 100 Submit Documentation Feedback °C/W OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 TYPICAL CHARACTERISTICS At TCASE = 25°C, RL = 10 kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2 (unless otherwise noted) COMMON-MODE REJECTION RATIO vs FREQUENCY 120 0 100 -30 80 -60 60 -90 40 -120 20 -150 0 -180 100 90 CMRR – dB Phase – ° 80 70 60 50 40 30 20 10 -20 10 100 1k 10k 100k 1M Frequency – Hz 10M 0 100M 10 100 1k 10k 100k Frequency – Hz Figure 1. Figure 2. POWER-SUPPLY REJECTION RATIO vs FREQUENCY QUIESCENT CURRENT vs SUPPLY VOLTAGE 1M 10M 1.4 100 Quiescent Current – mA Per Amplifier 80 PSRR – dB Voltage Gain – dB OPEN-LOOP GAIN/PHASE vs FREQUENCY 60 40 20 1.2 1 0.8 0.6 0.4 0 1 10 100 Frequency – Hz 3 3.5 4 4.5 Supply Voltage – V Figure 3. Figure 4. 1k 10k 100k 1M 10M 1.5 Submit Documentation Feedback 2 2.5 5 5.5 6 5 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 TYPICAL CHARACTERISTICS (continued) At TCASE = 25°C, RL = 10 kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2 (unless otherwise noted) TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY VOUT = –10 dBv G = 10, RL = 2 kΩ VS = 1.8 V THD+N – % 0.1 1 G = 10, RL = 2 kΩ VS = 5 V (VS = 5 V, VOUT = 1 Vrms) 0.1 THD+N – % 1 TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY G = 10, RL = 10 kΩ VS = 1.8 V, 5 V 0.01 0.001 G = 1, RL = 10 kΩ G = 1, RL = 2 kΩ VS = 1.8 V, 5 V VS = 5 V G = 1, RL = 2 kΩ VS = 1.8 V 0.0001 10 100 1k 10k G = 10, RL = 2 kΩ 0.01 G = 10, RL = 10 kΩ 0.001 G = 1, RL = 2 kΩ 0.0001 10 100k 100 Frequency – Hz 10k Figure 6. INPUT VOLTAGE NOISE SPECTRAL DENSITY vs FREQUENCY SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE 100k 120 Short-Circuit Current – mA Input Voltage Noise – nV/√Hz 1k Frequency – Hz Figure 5. 1000 100 100 +ISC 80 60 40 –ISC 20 0 10 10 100 1k Frequency – Hz 10k 100k 1.5 Figure 7. 6 G = 1, RL = 10 kΩ 2 2.5 3 3.5 4 4.5 Supply Voltage – V Figure 8. Submit Documentation Feedback 5 5.5 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 TYPICAL CHARACTERISTICS (continued) At TCASE = 25°C, RL = 10 kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2 (unless otherwise noted) OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 4 VS = 2.5 V VS = 1.65 V Output Voltage – V 2 1 VS = 0.9 V 0 -1 -2 VS = 1.65 V VS = 2.5 V -3 0 10 20 TA = –40°C TA = 25°C TA = 125°C 30 40 50 60 70 Output Current – mA 80 Input Bias Current – pA 3 INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE 0 -2 VCM = 5.1 V -4 -6 -8 VCM = –0.1 V -10 -0.5 90 100 0.5 1.5 2.5 3.5 4.5 Common-Mode Voltage – V Figure 9. Figure 10. INPUT OFFSET CURRENT vs TEMPERATURE INPUT BIAS CURRENT vs TEMPERATURE 10k 5.5 10k Input Bias Current – pA Input Offset Current – pA 2 1k 100 10 1 1k 100 10 1 -50 -25 0 25 50 75 Temperature – °C 100 125 -50 Figure 11. -25 0 25 50 75 Temperature – °C 100 125 Figure 12. Submit Documentation Feedback 7 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 TYPICAL CHARACTERISTICS (continued) At TCASE = 25°C, RL = 10 kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2 (unless otherwise noted) SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE SETTLING TIME vs CLOSED-LOOP GAIN 100 60 Settling Time – µs Overshoot – % 50 40 30 20 G = +1 0.01% 10 0.1% 1 10 G = +10 0.1 0 100 1k 1 Load Capacitance – pF 10 Closed-Loop Gain – V/V Figure 13. Figure 14. OFFSET DRIFT DISTRIBUTION OUTPUT ENABLE CHARACTERISTIC (VS = 5 V, VOUT = 20 kHz Sinusoid) VOUT 15 10 VENABLE Percent of Amplifiers – % 20 5 0 0 1 2 3 4 5 6 7 8 9 >10 50 µs/div Offset Voltage Drift – µV/°C Figure 15. 8 Figure 16. Submit Documentation Feedback 100 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 TYPICAL CHARACTERISTICS (continued) At TCASE = 25°C, RL = 10 kΩ, and connected to VS/2, VOUT = VS/2, VCM = VS/2 (unless otherwise noted) CHANNEL SEPARATION vs FREQUENCY SMALL-SIGNAL STEP RESPONSE (CL = 100 pF) 120 110 50 mV/div 100 90 80 70 60 50 40 10 100 1k 10k 100k Frequency – Hz 1M 250 ns/div 10M Figure 17. Figure 18. LARGE-SIGNAL STEP RESPONSE (CL = 100 pF) 1 V/div Channel Separation – dB 130 1 µs/div Figure 19. Submit Documentation Feedback 9 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 APPLICATION INFORMATION The OPAx364 series op amps are rail-to-rail operational amplifiers with excellent CMRR, low noise, low offset, and wide bandwidth on supply voltages as low as ±0.9 V. This family does not exhibit phase reversal and is unity-gain stable. Specified over the industrial temperature range of –40°C to 125°C, the OPAx364 family offers precision performance for a wide range of applications. Rail-to-Rail Input The OPAx364 features excellent rail-to-rail operation, with supply voltages as low as ±0.9 V. The input commonmode voltage range of the OPAx364 family extends 100 mV beyond supply rails. The unique input topology of the OPAx364 eliminates the input offset transition region typical of most rail-to-rail complimentary stage operational amplifiers, allowing the OPAx364 to provide superior common-mode performance over the entire common-mode input range (see Figure 20). This feature prevents degradation of the differential linearity error and THD when driving A/D converters. A simplified schematic of the OPAx364 is shown in Figure 21. 1.0 OPAx364 0.5 0 VOS – mV -0.5 -1.0 -1.5 -2.0 Competitors -2.5 -3.0 -3.5 -0.2 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Common-Mode Voltage – VCM Figure 20. OPAx364 Linear Offset Over Entire Common-Mode Range 10 Submit Documentation Feedback OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 APPLICATION INFORMATION (continued) VS Regulated Charge Pump VOUT = VCC +1.8 V VCC + 1.8 V IBIAS Patent-Pending Very Low-Ripple Topology IBIAS VOUT IBIAS VIN– VIN+ IBIAS Figure 21. Simplified Schematic Operating Voltage The OPAx364 series of operational amplifier parameters are fully specified from 1.8 V to 5.5 V. Single 0.1-µF bypass capacitors should be placed across supply pins and as close to the part as possible. Supply voltages higher than 5.5 V (absolute maximum) may cause permanent damage to the amplifier. Many specifications apply from –40°C to 125°C. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics. Submit Documentation Feedback 11 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 APPLICATION INFORMATION (continued) Capacitive Load The OPAx364 series operational amplifiers can drive a wide range of capacitive loads. However, all operational amplifiers under certain conditions may become unstable. Operational amplifier configuration, gain, and load value are just a few of the factors to consider when determining stability. An operational amplifier in unity-gain configuration is the most susceptible to the effects of capacitive load. The capacitive load reacts with the output resistance of the operational amplifier to create a pole in the small-signal response, which degrades the phase margin. In unity gain, the OPAx364 series operational amplifiers perform well with a pure capacitive load up to approximately 1000 pF. The equivalent series resistance (ESR) of the loading capacitor may be sufficient to allow the OPAx364 to directly drive large capacitive loads (>1 µF). Increasing gain enhances the amplifier’s ability to drive more capacitance as shown in Figure 13. One method of improving capacitive load drive in the unity gain configuration is to insert a 10-Ω to 20-Ω resistor in series with the output, as shown in Figure 22. 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 = 10 kΩ and RS = 20 Ω, there is only about a 0.2% error at the output. V+ RS VOUT OPAx364 10 W to 20 W VIN RL CL Figure 22. Improving Capacitive Load Drive Input and ESD Protection All OPAx364 pins are static protected with internal ESD protection diodes tied to the supplies. These diodes provide overdrive protection if the current is externally limited to 10 mA, as stated in the absolute maximum ratings and shown in Figure 23. V+ IOVERLOAD 10 mA max – OPAx364 VIN VOUT + 5 kW Figure 23. Input Current Protection Achieving Output Swing to the Operational Amplifier's Negative Rail Some applications require an accurate output voltage swing from 0 V to a positive full-scale voltage. A good single-supply operational amplifier may be able to swing within a few mV of single supply ground, but as the output is driven toward 0 V, the output stage of the amplifier prevents the output from reaching the negative supply rail of the amplifier. The output of the OPAx364 can be made to swing to ground, or slightly below, on a single-supply power source. To do so requires use of another resistor and an additional, more-negative power supply than the operational amplifier's negative supply. A pulldown resistor may be connected between the output and the additional negative supply to pull the output down below the value that the output would otherwise achieve as shown in Figure 24. 12 Submit Documentation Feedback OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 APPLICATION INFORMATION (continued) V+ = 5 V VOUT OPAx364 VIN 500 µA Negative Supply Grounded RP = 10 kΩ –V = –5 V (Additional Negative Supply) Figure 24. Swing to Ground This technique does not work with all operational amplifiers. The output stage of the OPAx364 allows the output voltage to be pulled below that of most operational amplifiers, if approximately 500 µA is maintained through the output stage. To calculate the appropriate value load resistor and negative supply, RL = –V/500 µA. The OPAx364 has been characterized to perform well under the described conditions, maintaining excellent accuracy down to 0 V and as low as –10 mV. Limiting and nonlinearity occurs below –10 mV, with linearity returning as the output is again driven above –10 mV. Buffered Reference Voltage Many single-supply applications require a mid-supply reference voltage. The OPAx364 offer excellent capacitive load drive capability and can be configured to provide a 0.9-V reference voltage (see Figure 25). For appropriate loading considerations, see the Capacitive Load section. V+ V+ R1 10 kΩ 0.9 V OPAx364 CL = 1 µF R2 10 kΩ Figure 25. OPAx364 Provides a Stable Reference Voltage Submit Documentation Feedback 13 OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 APPLICATION INFORMATION (continued) Directly Driving the ADS8324 and the MSP430 The OPAx364 series operational amplifiers are optimized for driving medium speed (up to 100 kHz) sampling A/D converters. However, they also offer excellent performance for higher-speed converters. The no crossover input stage of the OPAx364 directly drives A/D converters without degradation of differential linearity and THD. They provide an effective means of buffering the A/D converters input capacitance and resulting charge injection, while providing signal gain. Figure 26 and Figure 27 show the OPAx364 configured to drive the ADS8324 and the 12-bit A/D converter on the MSP430. V+ = 1.8 V V+ = 1.8 V 100 W – ADS8324 OPAx364 VIN 1 nF + Figure 26. OPAx364 Directly Drives the ADS8324 V+ V+ 100 Ω – OPAx364 MSP430 + VIN 1 nF Figure 27. Driving the 12-Bit A/D Converter on the MSP430 Audio Applications The OPAx364 family has linear offset voltage over the entire input common-mode range. Combined with low-noise, this feature makes the OPAx364 suitable for audio applications. Single-supply 1.8-V operation allows the OPA2364 to be an optimal candidate for dual stereo-headphone drivers and microphone preamplifiers in portable stereo equipment (see Figure 28). 49 kΩ Clean 3.3-V Supply 3.3 V 4 kΩ OPA2364 + Electret Microphone 6 kΩ 5 kΩ 1 µF Figure 28. Microphone Preamplifier 14 Submit Documentation Feedback VOUT OPA2364-Q1, OPA4364-Q1 www.ti.com SGLS363A – JUNE 2006 – REVISED OCTOBER 2006 APPLICATION INFORMATION (continued) Active Filtering Low harmonic distortion and noise specifications plus high gain and slew rate make the OPAx364 optimal candidates for active filtering. Figure 29 shows the implementation of a Sallen-Key, 3-pole, low-pass Bessel filter. 220 pF 1.8 kΩ 19.5 kΩ VIN = 1 Vrms 3.3 nF 150 kΩ + 47 pF OPAx364 – VOUT Figure 29. OPAx364 Configured as 3-Pole, 20-kHz, Sallen-Key Filter Submit Documentation Feedback 15 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) OPA4364AQDRQ1 ACTIVE SOIC D 14 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 OPA4364Q (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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% 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 JS709B low halogen requirements of