OPA504ASOT236

OPA503/OPA504 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 1. FEATURES 3. DESCRIPTION • Nanopower supply current: 570nA/channel • Offset voltage: 210μV (max) • TcVos: 1.2μV/°C • Unity gain-bandwidth: 11kHz • Wide supply range: 1.6V to 5.5V • Low input bias current: 0.1pA • Unity-gain stable • Rail-to-rail input and output • EMI protection • Shut-down The OPA503/4 is one of the ultra-low-power family operational amplifiers provided by AnalogySemi. With just 570nA of quiescent current and operating voltage ranged between 1.6V and 5.5V, the OPA503/4 operational amplifier is applicable to most battery-powered circumstances and stable even without additional boost topology. Keeping low power consumption and 11kHz of bandwidth, the OPA503/4 device works rather well with equipment such as CO detectors, smoke detectors, and PIR motion detectors. In addition, the OPA503/4 operational amplifier has CMOS input stages with typically femto-amp bias currents. EMI protection is incorporated into the OPA503/4 design in order to enhance overall system reliability by reducing system sensitivity to undesirable RF signals from mobile phones, Wi-Fi, radio transmitters, and tag readers. The EN pin can be used in low power application to save power. 2. APPLICATIONS • CO and O2 gas detectors • PIR motion detectors • Ionization smoke alarms • Thermostats • IoT remote sensors • Active RFID readers and tags • Portable medical equipment • Monitor and alarms • Wearable devices The OPA503/4 operational amplifier is offered in the SOT23-5 and SOT23-6 package respectively. All versions are specified from –40°C to 125°C, which makes them suitable for various rugged environment. See Table 1 for the order information. Nanopower Amplifier in Electrochemical Sensor Nanopower Amplifier in PIR Motion Detector CE RE – WE VREF – + IR – VREF CF Output to Comparator + RF RLoad – VREF + + © 2022 AnalogySemi Ltd. All Rights Reserved. VOUT Public www.analogysemi.com | Page 1 of 2 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers Table 1 lists the order information. Table 1. Order Information Order Number(1) CH(#) Package Marking IQ per CH (Typ) (nA) GBW (kHz) Slew Rate (Typ) (V/ms) Noise nV/√Hz (100Hz) Operating Temp (ºC) Package Option OPA503ASOT235 1 SOT23-5 OPA503 570 11 3 214 -40-125 T/R-3000 OPA504ASOT236 1 SOT23-6 OPA504 570 11 3 214 -40-125 T/R-3000 Table 2. Family Selection Guide Order Number(1) CH(#) Package Marking IQ per CH (Typ) (nA) GBW (kHz) Slew Rate (Typ) (V/ms) Noise nV/√Hz (100Hz) Operating Temp (ºC) Package Option OPA501BSOT235 1 SOT23-5 OPA501 240 4.2 1.3 347 -40-125 T/R-3000 OPA505ASOT235 1 SOT23-5 OPA505 3200 65 20 100 -40-125 T/R-3000 OPA506ASOT236 1 SOT23-6 OPA506 3200 65 20 100 -40-125 T/R-3000 Devices can be ordered via the following two ways: 1. Place orders directly on our website (www.analogysemi.com), or; 2. Contact our sales team by mailing to sales@analogysemi.com. Note: Order Number OPA50xV-Package Code Package Code Device Version Page 2 of 3 | www.analogysemi.com Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 4. PIN CONFIGURATION AND FUNCTIONS 1 V– 2 +IN 3 5 + OUT V+ – 4 –IN SOT23-5 Package (OPA503) OUT 1 V– 2 +IN 3 + Figure 1 illustrates the pin configuration. – 6 V+ 5 EN 4 –IN SOT23-6 Package (OPA504) Figure 1. Pin Configuration Table 3 lists the pin functions. Table 3. Pin Functions POSITION SOT23-5 SOT23-6 (OPA503) (OPA504) 1 2 3 4 5 --- 1 2 3 4 6 5 NAME TYPE OUT V– +IN –IN V+ EN Output Power Input Input Power Input © 2022 AnalogySemi Ltd. All Rights Reserved. DESCRIPTION Output Negative (lowest) power supply Positive (non-inverting) input Negative (inverting) input Positive (highest) power supply Pull to V– to enable operation Public www.analogysemi.com | Page 3 of 4 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5. SPECIFICATIONS 5.1 ABSOLUTE MAXIMUM RATINGS Table 4 lists the absolute maximum ratings of the OPA503/4. Over operating free-air temperature range, unless otherwise noted. Table 4. Absolute Maximum Ratings PARAMETER DESCRIPTION Supply Voltage Current Signal input pins(2)(3) Common-mode Differential Signal input pins Output Operating, TA Temperature Junction, TJ Storage, Tstg MIN MAX UNITS –0.3 (V–) – 0.3 6 (V+) + 0.3 V (V–) – 0.3 –10 (V+) + 0.3 10 mA short-circuit(4) Continuous –40 125 150 150 –65 °C Note 1: Stresses beyond those listed under Table 4 may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Table 6. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Note 2: Not to exceed –0.3V or +6.0V on ANY pin, referred to V–. Note 3: Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.3V beyond the supply rails should be current-limited to 10mA or less. Note 4: Short-circuit to VS / 2, one amplifier per package. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150°C. 5.2 ESD RATINGS Table 5 lists the ESD ratings of the OPA503/4. Table 5. ESD Ratings PARAMETER Electrostatic Discharge SYMBOL V(ESD) DESCRIPTION VALUE (1) ±6000 JESD22-C101(2) ±2000 Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 Charged-device model (CDM), per JEDEC specification UNITS V Note 1: The JEDEC document JEP155 indicates that 500V HBM allows safe manufacturing with a standard ESD control process. Note 2: The JEDEC document JEP157 indicates that 250V CDM allows safe manufacturing with a standard ESD control process. Page 4 of 5 | www.analogysemi.com Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.3 RECOMMENDED OPERATING CONDITIONS Table 6 lists the recommended operating conditions for the OPA503/4. Over operating free-air temperature range, unless otherwise noted. Table 6. Recommended Operating Conditions PARAMETER Operating Voltage Range Specified Temperature Range MIN NOM 1.6 –40 MAX UNITS 5.5 125 V °C 5.4 THERMAL INFORMATION Table 7 lists the thermal information for the OPA503/4. Table 7. Thermal Information PARAMETER Junction-to-Ambient Thermal Resistance Junction-to-Case (Top) Thermal Resistance Junction-to-Board Thermal Resistance Junction-to-Top Characterization Parameter Junction-to-Board Characterization Parameter Junction-to-Case (Bottom) Thermal Resistance © 2022 AnalogySemi Ltd. All Rights Reserved. Public SYMBOL SOT23-5 SOT23-6 UNITS RθJA RθJC(top) RθJB ψJT ψJB RθJC(bot) 168 103 39 10 36 66 169 109 28 11 28 59 °C/W °C/W °C/W °C/W °C/W °C/W www.analogysemi.com | Page 5 of 6 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.5 ELECTRICAL CHARACTERISTICS Table 8 lists the electrical characteristics of OPA503/4. TA = 25°C, VS = 1.8V to 5V, VCM = VOUT = VS / 2, and RL ≥ 10MΩ to VS / 2, unless otherwise noted. Table 8. Electrical Characteristics PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ±52 ±210 µV OFFSET VOLTAGE Input Offset Voltage Input Offset Drift Power-Supply Rejection Ratio INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection Ratio INPUT BIAS CURRENT Input Bias Current Input Offset Current INPUT IMPEDANCE Differential(1) Common Mode(1) NOISE Input Voltage Noise Input Voltage Noise Density OPEN-LOOP GAIN Open-Loop Voltage Gain OUTPUT Voltage Output Swing from Positive Rail Voltage Output Swing from Negative Rail Short-Circuit Current FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate (10% to 90%) VOS ΔVOS/ΔT PSRR CMRR 1.2 VS = 1.8V to 5V, VCM = VDD/2 15 0 VCM (V–) ≤ VCM ≤ (V+), VS = 5V 77 µV/°C 93 µV/V VDD V 94 IB VS = 1.8V, VCM = VS / 2 ±100 IOS VS = 1.8V, VCM = VS / 2 ±100 dB fA 3.3 7.2 En pF ƒ = 0.1Hz to 10Hz ƒ = 100Hz 9.1 214 ƒ = 1kHz 238 AOL (V–) + 0.3V ≤ VO ≤ (V+) – 0.3V, RL = 100kΩ 120 VOH VS = 1.8V, RL = 100kΩ to (V+) / 2 2 10 VOL VS = 1.8V, RL = 100kΩ to (V+) / 2 1.5 10 ISC VS = 3.3V, short to VS / 2 10 mA CL = 20pF, RL = 10MΩ, VS = 5V 11 kHz G = 1, Rising Edge, CL = 20pF, VS = 5V G = 1, Falling Edge, CL = 20pF, VS = 5V 3 6 V/ms VCM = V–, IO = 0, VS = 3.3V VCM = V–, IO = 0, VS = 3.3V, EN = VDD, OPA504 570 705 nA 40 100 nA V– V V en μVpp nV/√Hz dB mV GBP SR POWER SUPPLY Quiescent Current Shutdown Current LOGIC INPUT Enable Input High Enable Input Low VS = 1.8V, 3.3V, and 5V, VCM = VS /2 or VCM = (V+) – 0.9V VCM = V–, TA = –40°C to 125°C VIH VIL V+ V+ V– Note: Guaranteed by design. Page 6 of 7 | www.analogysemi.com Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.6 TYPICAL CHARACTERISTICS TA = 25°C, VS = 3.3V, RL = 10MΩ to VS / 2, CL = 20pF, VCM = VS / 2V, unless otherwise specified. Figure 2. Typical Offset Voltage vs. Common Mode Voltage, 1.8V Figure 3. Input Voltage Noise vs. Frequency Figure 4. Typical Offset Voltage vs. Common Mode Voltage, 3.3V Figure 5. Integrated Noise Figure 6. Typical Offset Voltage vs. Common Mode Voltage, 5V Figure 7. Input Bias Current vs. Temperature © 2022 AnalogySemi Ltd. All Rights Reserved. Public www.analogysemi.com | Page 7 of 8 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.7 TYPICAL CHARACTERISTICS (CONTINUED) TA = 25°C, VS = 3.3V, RL = 10MΩ to VS / 2, CL = 20pF, VCM = VS / 2V, unless otherwise specified. Figure 8. Input Bias Current vs. Common Mode Voltage Figure 9. Input Bias Current vs. Common Mode Voltage Figure 10. Input Bias Current vs. Common Mode Voltage Figure 11. Input Bias Current vs. Common Mode Voltage Figure 12. Input Bias Current vs. Common Mode Voltage Figure 13. Input Bias Current vs. Common Mode Voltage Page 8 of 9 | www.analogysemi.com Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.8 TYPICAL CHARACTERISTICS (CONTINUED) TA = 25°C, VS = 3.3V, RL = 10MΩ to VS / 2, CL = 20pF, VCM = VS / 2V, unless otherwise specified. Figure 14. Output Swing vs. Sourcing Current, 1.8V Figure 15. Output Swing vs. Sinking Current, 1.8V Figure 16. Output Swing vs. Sourcing Current, 3.3V Figure 17. Output Swing vs. Sinking Current, 3.3V Figure 18. Output Swing vs. Sourcing Current, 5V Figure 19. Output Swing vs. Sinking Current, 5V © 2022 AnalogySemi Ltd. All Rights Reserved. Public www.analogysemi.com | Page 9 of 10 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.9 TYPICAL CHARACTERISTICS (CONTINUED) TA = 25°C, VS = 3.3V, RL = 10MΩ to VS / 2, CL = 20pF, VCM = VS / 2V, unless otherwise specified. Figure 20. Small Signal Pulse Response, 1.8V Figure 21. Large Signal Pulse Response, 1.8V Figure 22. Small Signal Pulse Response, 3.3V Figure 23. Large Signal Pulse Response, 3.3V Figure 24. Small Signal Pulse Response, 5V Figure 25. Large Signal Pulse Response, 5V Page 10 of 11 | www.analogysemi.com Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.10 TYPICAL CHARACTERISTICS (CONTINUED) TA = 25°C, VS = 3.3V, RL = 10MΩ to VS / 2, CL = 20pF, VCM = VS / 2V, unless otherwise specified. Figure 26. Open Loop Gain and Phase, 3.3V, 10MΩ Load Figure 27. CMRR vs. Frequency Figure 28. Open Loop Gain and Phase, 3.3V, 1MΩ Load Figure 29. PSRR vs. Frequency Figure 30. Open Loop Gain and Phase, 3.3V, 100kΩ Load Figure 31. EMIRR Performance © 2022 AnalogySemi Ltd. All Rights Reserved. Public www.analogysemi.com | Page 11 of 12 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 5.11 TYPICAL CHARACTERISTICS (CONTINUED) TA = 25°C, VS = 3.3V, RL = 10MΩ to VS / 2, CL = 20pF, VCM = VS / 2V, unless otherwise specified. Figure 32. Supply Current vs. Supply Voltage Page 12 of 13 | www.analogysemi.com Figure 33. Shut-Down Current vs. Temperature Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 6. DETAILED DESCRIPTION 6.1 OVERVIEW The OPA503/4 nanopower CMOS operational amplifier is designed for long-life battery-powered and energy harvested applications. They can operate on a single supply with operation as low as 1.6V. Low input bias current make it an ideal choice for sensor interface, in particular for sensors that operate with low voltage and at low frequency. The common-mode range extends to the power supply, making it ideal for singlesupply applications. EMI protection has been employed internally to reduce the effects of EMI. 6.2 FEATURE DESCRIPTION 6.2.1 RAIL-TO-RAIL INPUT The OPA503/4 features a rail-to-rail input with 100fA bias current, making it ideal for sensor like CO and O2 gas detectors. Low input bias current contributes less error to sensor. See Figure 7 through Figure 13 for typical input bias current. 6.2.2 RAIL-TO-RAIL OUTPUT STAGE The OPA503/4 output voltage swings 2mV from rails at 1.8V supply, which provides the maximum possible dynamic range at the output. This is particularly important when operating on low supply voltages. The Maximum Output Voltage Swing graph defines the maximum swing possible under a particular output load. See Figure 14 through Figure 19. 6.2.3 POWER SUPPLY Connect a 100nF capacitor as close as possible to the V+/V– pin, to reduce ripple of power supply. Care need be taken while selecting the capacitor, as the OPA503/4 is nanopower component, in low power application, static leakage current of ceramic capacitor cannot be ignored, especially at high temperature. Usually high-voltage ceramic capacitor has low static leakage current, use a high-voltage ceramic capacitor or film capacitor when static leakage current matters. When designing for ultralow power, choose system feedback components carefully. To minimize quiescent current consumption, select large-value feedback resistors. Any large resistors will react with stray capacitance in the circuit and the input capacitance of the operational amplifier. These parasitic RC combinations can affect the stability of the overall system. A feedback capacitor may be required to assure stability and limit overshoot or gain peaking. When possible, use AC coupling and AC feedback to reduce static current draw through the feedback elements. Use film or ceramic capacitors since large electrolytic may have large static leakage currents in the nanoamps. 6.2.4 SHUTDOWN OPERATION The device features an active-low enable mode, pulling the EN pin to V– for normal operation. To shut down the device, pull the EN pin to V+. In shutdown mode, the quiescent current is only 40nA, significantly reducing power consumption. It is highly recommended to connect the EN pin to V+ or V– to enable high (VIH) or low (VIL) threshold voltages. Putting the EN pin in the middle of V+ and V– may cause high-supply current. © 2022 AnalogySemi Ltd. All Rights Reserved. Public www.analogysemi.com | Page 13 of 14 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 6.2.5 DRIVING CAPACITIVE LOAD The OPA503/4 is internally compensated for stable unity gain operation, with a 4.2kHz typical gain bandwidth. However, the unity gain follower is the most sensitive configuration to capacitive load. The combination of a capacitive load placed directly on the output of an amplifier along with the amplifier’s output impedance creates a phase lag, which reduces the phase margin of the amplifier. If the phase margin is significantly reduced, the response will be under damped, which causes peaking in the transfer and, when there is too much peaking, the op amp might start oscillating. In order to drive heavy (> 50pF) capacitive loads, an isolation resistor, RISO, should be used. By using this isolation resistor, the capacitive load is isolated from the amplifier’s output. The larger the value of RISO, the more stable the amplifier will be. If the value of RISO is sufficiently large, the feedback loop will be stable, independent of the value of CL. However, larger values of RISO result in reduced output swing and reduced output current drive. The recommended value for RISO is 30-50kΩ. RISO VOUT VIN CL Figure 34. Resistive Isolation of Capacitive Load 6.2.6 PCB LAYOUT RECOMMENDATION Take care about layout routing. Parasitic capacitor on the input and output can significantly lower phase margin and bandwidth. For some applications like unit gain, if there is ground shield in inner layer or bottom layer, fine routing is recommended, or use bottom layer instead of inner layer as ground shield. Furthermore, the routing of input and output should be as short as possible. Page 14 of 15 | www.analogysemi.com Public © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 7. PACKAGE INFORMATION 7.1 SOT23-5 PACKAGE Figure 35 shows the SOT23-5 package view. D b L1 E E1 L 0.2 e A A1 A2 e1 Figure 35. SOT23-5 Package View Table 9 provides detailed information about the dimensions of the SOT23-5 package. Table 9. Dimensions of the SOT23-5 Package SYMBOL A A1 A2 b c D E E1 e e1 L L1 θ DIMENSIONS IN MILLIMETERS MIN MAX 1.050 0.000 1.050 0.300 0.100 2.820 2.650 1.500 1.250 0.100 1.150 0.500 0.200 3.020 2.950 1.700 DIMENSIONS IN INCHES MIN MAX 0.041 0.000 0.041 0.012 0.004 0.111 0.104 0.059 0.950 (BSC) 1.800 0.300 © 2022 AnalogySemi Ltd. All Rights Reserved. 0.037 (BSC) 2.000 0.600 0.071 0.012 8° 0° 0.600 REF. 0° 0.049 0.004 0.045 0.020 0.008 0.119 0.116 0.067 0.079 0.024 0.024 REF. Public 8° www.analogysemi.com | Page 15 of 16 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 7.2 SOT23-6 PACKAGE Figure 36 shows the SOT23-6 package view. D b L1 E E1 L 0.2 e A A1 A2 e1 Figure 36. SOT23-6 Package View Table 10 provides detailed information about the dimensions of the SOT23-6 package. Table 10. Dimensions of the SOT23-6 Package SYMBOL A A1 A2 b c D E E1 e e1 L L1 θ Page 16 of 17 | www.analogysemi.com DIMENSIONS IN MILLIMETERS MIN MAX 1.050 0.000 1.050 0.300 0.100 2.820 2.650 1.500 1.250 0.100 1.150 0.500 0.200 3.020 2.950 1.700 DIMENSIONS IN INCHES MIN MAX 0.041 0.000 0.041 0.012 0.004 0.111 0.104 0.059 0.950 (BSC) 1.800 0.300 0.037 (BSC) 2.000 0.600 0.071 0.012 8° 0° 0.600 REF. 0° 0.049 0.004 0.045 0.020 0.008 0.119 0.116 0.067 0.079 0.024 0.024 REF. Public 8° © 2022 AnalogySemi Ltd. All Rights Reserved. OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers 8. TAPE AND REEL INFORMATION Figure 37 illustrates the carrier tape. 0.23±0.05 +0.10 1.75±0.10 Φ1.50 –0.00 4.00±0.10 2.00±0.05 9º MAX A +0.25 Φ1.00 –0.00 +0.30 4.00±0.10 B 3.17±0.10 A 8.00 –0.10 3.50±0.05 B 1.37±0.10 B-B 9º MAX 3.23±0.10 A-A Notes: 1. Cover tape width: 5.50 ± 0.10. 2. Cumulative tolerance of 10 sprocket hole pitch: ±0.20 (max). 3. Camber: not to exceed 2mm in 250mm. 4. Mold#: SOT23-5/SOT23-6. 5. All dimensions: mm. 6. Direction of view: Figure 37. Carrier Tape Drawing Table 11 provides information about tape and reel. Table 11. Tape and Reel Information PACKAGE TYPE SOT23-5 (OPA503)/ SOT23-6 (OPA504) REEL QTY/REEL 7’’ 3000 INNER BOX/ REEL/ QTY/CARTON INNER BOX CARTON 10 4 120000 INNER BOX SIZE (MM) CARTON SIZE (MM) 210*208*203 440*440*230 Figure 38 shows the product loading orientation—pin 1 is assigned on the lower left corner. Pin 1 Pin 1 SOT23-5 (OPA503) SOT23-6 (OPA504) Figure 38. Product Loading Orientation © 2022 AnalogySemi Ltd. All Rights Reserved. Public www.analogysemi.com | Page 17 of 18 OPA503/4 5V, High-Precision, Ultra-Low-Power Operational Amplifiers REVISION HISTORY REVISION DATE Rev A Rev B 30 March 2022 31 March 2022 Page 18 of 18 | www.analogysemi.com DESCRIPTION Rev A release. Updated the PACKAGE OPTION columns in Table 1 and Table 2. Public © 2022 AnalogySemi Ltd. All Rights Reserved.