INA281A4IDBVT vs INA281B5IDBVT
| Part Number |
|
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| Category | Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps | Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | -4 TO 100-V, 1-MHZCURRENT | -4 TO 100-V, 1-MHZCURRENT |
| Package | Tube | Tube |
| Series | - | - |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-74A, SOT-753 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 | SOT-23-5 |
| Current - Supply | 1.5mA | 1.5mA |
| Output Type | - | - |
| Number of Circuits | 1 | 1 |
| Voltage - Supply, Single/Dual (±) | 2.7V ~ 20V | 2.7V ~ 20V |
| Current - Output / Channel | - | - |
| -3db Bandwidth | - | - |
| Amplifier Type | Current Sense | Current Sense |
| Current - Input Bias | 20 µA | 20 µA |
| Voltage - Input Offset | 30 µV | 15 µV |
| Slew Rate | 2.5V/µs | 2.5V/µs |
| Gain Bandwidth Product | 900 kHz | 900 kHz |
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1. What is an instrumentation amplifier and what is it mainly used for?
An instrumentation amplifier is a high-precision amplifier designed to amplify low-level differential signals with high input impedance and high common mode rejection ratio (CMRR), and is commonly used in scenarios such as medical equipment, sensor signal processing, and industrial measurements.
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2. How is the noise performance of instrumentation amplifiers optimized?
Select low-noise amplifiers in your design and use shielding, filters, and precise power management to minimize external noise. High-quality resistors should be used wherever possible and PCB layout should be optimized to reduce noise coupling.
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3. What is a gain adjustable instrumentation amplifier?
Gain-adjustable instrumentation amplifiers allow the gain to be adjusted by external resistors or digital controls to accommodate the dynamic range of different signal sources. These amplifiers are commonly used in a variety of sensor systems.
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4. Why do buffer amplifiers have high input impedance and low output impedance?
A high input impedance ensures that no load is applied to the preamplifier circuitry, preventing signal degradation, while a low output impedance provides a large driving capacity, ensuring that the signal can be passed on to subsequent circuits without loss.
