COSTLV9061TR

COSTLV9061/9062/9064 1.8V to 7.0V, 10MHz, RRIO Low Power Operational Amplifiers Features General Description ■ Operates on 1.8V ~ 7.0V Supplies The ■ Input Offset voltage: ±2mV(max) (dual) ■ Low Quiescent Current: 725μA micro-power, ■ Gain Bandwidth Product: 10MHz amplifiers operated on 1.8V to 7.0V supplies. ■ Slew Rate: 8.5V/µs Despite their ■ Rail-to-Rail Input and Output (RRIO) COSTLV906x family provides excellent overall ■ Unity Gain Stable performance and versatility. They have both ■ No Phase Reversal rail-to-rail input and output range. The output ■ Extended Temperature Ranges voltage swing extends to within 10mV of each From -40°C to +125°C rail, providing the maximum output dynamic Small Packaging range COSTLV9061 available in SOT23-5 COSTLV906x family is unity gain stable and COSTLV9061S available in SOT23-6 has a gain bandwidth product of 10MHz COSTLV9062 available in SOP8/MSOP8 (typical). They provide high CMRR and PRSS COSTLV9062S available in MSOP10 performance and can operate from a single COSTLV9064 available in SOP14 and supply voltage as low as 1.8V. ■ COSTLV9061 and with (single), COSTLV9062 COSTLV9064 rail-to-rail (quad) input low quiescent excellent and are output current, the overdrive recovery. TSSOP14 The Applications COSTLV906xS shutdown mode devices include (COSTLV9061S, a and COSTLV9062S) that allow the amplifiers to ■ Battery or Solar Powered Systems switch off into standby mode with typical ■ Portable Equipment current consumption less than 5 µA. These ■ Sensor Conditioning features make the COSTLV906x family well ■ White Goods suited ■ Smoke/Gas/Environment Sensors applications. They can be used as plus-in Rev1.0 Copyright@2018 Cosine Nanoelectronics Inc. All rights reserved The information provided here is believed to be accurate and reliable. Cosine Nanoelectronics assumes no reliability for inaccuracies and omissions. Specifications described and contained here are subjected to change without notice on the purpose of improving the design and performance. All of this information described herein should not be implied or granted for any third party. www.cosine-ic.com for single-supply, battery-powered replacements for many commercially available op-amps to reduce power and improve input/output range and performance. 1 COSTLV9061/9062/9064 1. Pin Configuration and Functions Pin Functions Name Description Note +Vs Positive power supply A bypass capacitor of 0.1μF as close to the part as possible should be placed between power supply pins or between supply pins and ground. -Vs Negative power supply or ground If it is not connected to ground, bypass it with a capacitor of 0.1μF as close to the part as possible. -IN Negative input Inverting input of the amplifier. Voltage range of this pin can go from -Vs -0.3V to +Vs + 0.3V. +IN Positive input Non-inverting input of the amplifier. This pin has the same voltage range as –IN. OUT Output The output voltage range extends to within millivolts of each supply rail. Shutdown High: enable op-amp; Low: disable op-amp www.cosine-ic.com 2 COSTLV9061/9062/9064 2. Product Specification 2.1 Absolute Maximum Ratings (1) Parameter Power Supply: +Vs to -Vs Input Voltage Input Current (2) Storage Temperature Range Junction Temperature Operating Temperature Range ESD Susceptibility, HBM Rating Units 7.5 V -Vs -0.5V to +Vs + 0.5V V 10 mA -65 to 150 °C 150 °C -40 to 125 °C 2000 V (1) Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. (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. 2.2 Thermal Data Parameter Rating Unit Package Thermal Resistance 190 (SOT23-5) 206 (MSOP8) 155 (SOP8) 105 (TSSOP14) 82 (SOP14) °C/W Rating Unit DC Supply Voltage 1.8V ~ 7V V Input common-mode voltage range -Vs ~ +Vs V Operating ambient temperature -40 to +85 °C 2.3 Recommended Operating Conditions Parameter www.cosine-ic.com 3 COSTLV9061/9062/9064 2.4 Electrical Characteristics (+VS=+5V, -VS=0, VCM=VS/2, TA=+25°C, RL=10kΩ to VS/2, unless otherwise noted) Parameter Symbol Conditions Min Typ Max ±0.4 ±2 Unit Input Characteristics Input Offset Voltage VOS Input Offset Voltage Drift ΔVOS/ΔT Input Bias Current COSTLV906xA COSTLV906xB ±5 -40 to 125°C mV ±0.6 μV/°C IB ±2.5 pA Input Offset Current IOS ±2.5 pA Common-Mode Voltage Range VCM VS = 5.5V Common-Mode Rejection Ratio CMRR VCM =0.1V to 4.9V 125 dB Open-Loop Voltage Gain AOL VO=0.2V to 4.8V 120 dB RL=100kΩ 1 mV RL=10kΩ 8 mV RL=2kΩ 40 mV ISR Sourcing 21 mA ISK Sinking 22 mA -0.1 5.6 V Output Characteristics Output Voltage Swing from Rail Short-Circuit Current Power Supply Operating Voltage Range 1.8 Power Supply Rejection Ratio PSRR Quiescent Current / Amplifier IQ VS = +1.8V to +5.5V IO = 0 mA 80 7.0 V 100 dB 725 μA Shutdown mode 5 μA Dynamic Performance Gain Bandwidth Product GBWP G=+1 10 MHz Slew Rate SR G = +1 , 2V Output Step 8.5 V/μs en f=1kHz 12 nV/√Hz Noise Performance Voltage Noise Density www.cosine-ic.com 4 COSTLV9061/9062/9064 3.0 Application Notes Driving Capacitive Loads Driving large capacitive loads can cause stability problems for voltage feedback op amps. As the load capacitance increases, the feedback loop’s phase margin decreases, and the closed loop bandwidth is reduced. This produces gain peaking in the frequency response, with overshoot and ringing in the step response. A unity gain buffer (G = +1) is the most sensitive to capacitive loads, but all gains show the same general behavior. When driving large capacitive loads with these op amps (e.g., > 100 pF when G = +1), a small series resistor at the output (RISO in Figure 1) improves the feedback loop’s phase margin (stability) by making the output load resistive at higher frequencies. It does not, however, improve the bandwidth. To select RISO, check the frequency response peaking (or step response overshoot) on the bench. If the response is reasonable, you do not need RISO. Otherwise, start RISO at 1 kΩ and modify its value until the response is reasonable. Figure 1. Indirectly Driving Heavy Capacitive Load An improvement circuit is shown in Figure 2. It provides DC accuracy as well as AC stability. RF provides the DC accuracy by connecting the inverting signal with the output, CF and RISO serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the amplifier’s inverting input, thereby preserving phase margin in the overall feedback loop. Figure 2. Indirectly Driving Heavy Capacitive Load with DC Accuracy www.cosine-ic.com 5 COSTLV9061/9062/9064 For noninverting configuration, there are two others ways to increase the phase margin: (a) by increasing the amplifier’s gain or (b) by placing a capacitor in parallel with the feedback resistor to counteract the parasitic capacitance associated with inverting node, as shown in Figure 3. Figure 3. Adding a Feedback Capacitor in the Noninverting Configuration Power-Supply Bypassing and Layout The COSTLV9061/2/4 operates from a single +1.8V to +5.5V supply or dual ±0.9V to ±2.75V supplies. For single-supply operation, bypass the power supply +Vs with a 0.1μF ceramic capacitor which should be placed close to the +Vs pin. For dual-supply operation, both the +Vs and the -Vs supplies should be bypassed to ground with separate 0.1μF ceramic capacitors. 2.2μF tantalum capacitor can be added for better performance. The length of the current path is directly proportional to the magnitude of parasitic inductances and thus the high frequency impedance of the path. High speed currents in an inductive ground return create an unwanted voltage noise. Broad ground plane areas will reduce the parasitic inductance. Thus a ground plane layer is important for high speed circuit design. Typical Application Circuits Differential Amplifier The circuit shown in Figure 4 performs the differential function. If the resistors ratios are equal (R4 / R3 = R2 / R1), then VOUT = (VIP – VIN) × R2 / R1 + VREF. www.cosine-ic.com 6 COSTLV9061/9062/9064 Figure 4. Differential Amplifier Low Pass Active Filter When receiving low-level signals, limiting the bandwidth of the incoming signals into the system is often required. The simplest way to establish this limited bandwidth is to place an RC filter at the noninverting terminal of the amplifier. If even more attenuation is needed, a multiple pole filter is required. The Sallen-Key filter can be used for this task, as Figure 5. For best results, the amplifier should have a bandwidth that is 8 to 10 times the filter frequency bandwidth. Failure to follow this guideline can result in reduction of phase margin. The large values of feedback resistors can couple with parasitic capacitance and cause undesired effects such as ringing or oscillation in high-speed amplifiers. Keep resistors value as low as possible and consistent with output loading consideration. Figure 5. Two-Pole Low-Pass Sallen-Key Active Filter www.cosine-ic.com 7 COSTLV9061/9062/9064 4. Package Information 4.1 SOT23-5 (Package Outline Dimensions) 4.2 SOP8 (Package Outline Dimensions) www.cosine-ic.com 8 COSTLV9061/9062/9064 4.3 MSOP8 (Package Outline Dimensions) 4.4 SOP14 (Package Outline Dimensions) www.cosine-ic.com 9 COSTLV9061/9062/9064 4.5 TSSOP14 (Package Outline Dimensions) 5. Order Information Model Channel COSTLV9061 1 COSTLV9061S COSTLV9062 2 COSTLV9062S COSTLV9064 www.cosine-ic.com 4 Order Number Package Package Option Marking Information COSTLV9061TR SOT23-5 Tape and Reel, 3000 C9061 COSTLV9061TRU SOT23-5 Tape and Reel, 3000 C9061U COSTLV9061STR SOT23-6 Tape and Reel, 3000 C9061S COSTLV9061STRU SOT23-6 Tape and Reel, 3000 C9061SU COSTLV9062SR SOP-8 Tape and Reel, 3000 COS9062 COSTLV9062MR MSOP-8 Tape and Reel, 3000 COS9062 COSTLV9062SMRA MSOP-10 Tape and Reel, 3000 COS9062S COSTLV9062SMRB MSOP-10 Tape and Reel, 3000 COS9062S COSTLV9064SR SOP-14 Tape and Reel, 3000 COS9064 COSTLV9064TR TSSOP-14 Tape and Reel, 3000 COS9064 10