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OPA388-Q1 Datasheet(PDF) 22 Page - Texas Instruments |
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OPA388-Q1 Datasheet(HTML) 22 Page - Texas Instruments |
22 / 34 page 9 Power Supply Recommendations The OPAx388-Q1 family of operational amplifiers can be used with single or dual supplies from an operating range of VS = 2.5 V (±1.25 V) up to 5.5 V (±2.75 V). Key parameters that vary over the supply voltage or temperature range are shown in Section 6.7. CAUTION Supply voltages greater than 7 V can permanently damage the device (see Section 6.1). 10 Layout 10.1 Layout Guidelines Pay attention to good layout practice. Keep traces short and, if possible, use a printed-circuit board (PCB) ground plane with surface-mount components placed as close as possible to the device pins. Place a 0.1-µF capacitor closely across the supply pins. Apply these guidelines throughout the analog circuit to improve performance and provide benefits, such as reducing the electromagnetic interference (EMI) susceptibility. For lowest offset voltage and precision performance, optimize the circuit layout and mechanical conditions. Avoid temperature gradients that create thermoelectric (Seebeck) effects in the thermocouple junctions formed from connecting dissimilar conductors. These thermally-generated potentials can be made to cancel by making sure these potentials are equal on both input terminals. Other layout and design considerations include: • Use low thermoelectric-coefficient conditions (avoid dissimilar metals). • Thermally isolate components from power supplies or other heat sources. • Shield operational amplifier and input circuitry from air currents, such as cooling fans. Follow these guidelines to reduce the likelihood of junctions being at different temperatures, which can cause thermoelectric voltage drift of 0.1 µV/°C or greater, depending on the materials used. 10.2 Layout Example + VIN VOUT RG RF Figure 10-1. Schematic Representation N/C ±IN +IN V± V+ OUTPUT N/C N/C VS+ GND Ground (GND) plane on another layer VOUT VIN GND Run the input traces as far away from the supply lines as possible RF RG Place components close to device and to each other to reduce parasitic errors Use low-ESR, ceramic bypass capacitors GND Figure 10-2. Layout Example OPA388-Q1, OPA2388-Q1 SBOS989A – AUGUST 2020 – REVISED NOVEMBER 2021 www.ti.com 22 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: OPA388-Q1 OPA2388-Q1 |
Similar Part No. - OPA388-Q1_V01 |
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Similar Description - OPA388-Q1_V01 |
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