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INA240A1PW
Ultra-precise current sense amplifier
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製造商零件號 # : INA240A1PW
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包裝/封裝: TSSOP (PW)-8
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零件狀態 : Active
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製造商: Texas Instruments
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產品分類 : Instrumentation, OP Amps, Buffer Amps
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INA240A1PW 數據表
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詳細說明
Texas Instruments' INA240A1PW is a high-performance current sense amplifier targeted at automotive and industrial applications. Its wide input voltage range of 2.7V to 36V provides flexibility and compatibility with various systems, and the fixed gain of 50V/V allows for accurate current measurements with minimal sense voltage drop. With a low offset voltage and drift, this device maintains precision across an extensive temperature range, from -40°C to 125°C. Furthermore, its high common-mode rejection ratio of 100dB ensures dependable performance in noisy environments, making it well-suited for challenging conditions. The compact TSSOP-16 package adds to its appeal, making it an optimal choice for space-constrained installations. In summary, the INA240A1PW is a reliable and efficient current shunt monitor that fulfills the demanding requirements of high-side, bidirectional applications in the automotive and industrial sectors
主要特徵
- Maintained Accuracy: ±0.25% (Maximum)
- Consistent Gain: 20 dB (Typical)
- Sufficient Headroom: 10 dB (Minimum)
應用
- Key component in power supplies
- Reliable in industrial automation
- Ensures accurate current monitoring
規格
以下是所選零件的基本參數，涉及零件的特性及其所屬類別。
| Product type | Analog output | Common-mode voltage (max) (V) | 80 |
| Common-mode voltage (min) (V) | -4 | Input offset (±) (max) (µV) | 25 |
| Input offset drift (±) (typ) (µV/°C) | 0.05 | Voltage gain (V/V) | 20, 50, 100, 200 |
| CMRR (min) (dB) | 120 | Bandwidth (kHz) | 400 |
| Supply voltage (max) (V) | 5.5 | Supply voltage (min) (V) | 2.7 |
| Iq (max) (mA) | 2.6 | Number of channels | 1 |
| Comparators (#) | 0 | Gain error (%) | 0.2 |
| Gain error drift (±) (max) (ppm/°C) | 2.5 | Slew rate (V/µs) | 2 |
| Features | Bidirectional, Enhanced PWM Rejection, Low-side Capable, Ultra precise | Rating | Catalog |
| Operating temperature range (°C) | -40 to 125 |
Specification Comparison
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等，這對於作為器件特定應用的整體指南大有裨益。
常見問題解答
What is INA240A1PW?
The INA240A1PW is a high-accuracy, bidirectional, current-sensing amplifier with an integrated shunt resistor designed by Texas Instruments. It is suitable for applications requiring high-precision current measurements, such as motor control, battery monitoring, and power management systems.
How Does INA240A1PW Work?
The INA240A1PW works by sensing the voltage drop across an integrated shunt resistor to accurately measure the current flowing through the load. It utilizes a precision amplifier to amplify the small voltage signal across the shunt resistor and provides an output proportional to the load current. The bidirectional capability allows measurement of both forward and reverse currents.
How Many Pins does INA240A1PW have and What are the Functions of the Pinout Configuration?
The INA240A1PW is housed in a 16-pin TSSOP (Thin Shrink Small Outline Package) package. The pinout configuration includes:
- V+: Positive power supply pin.
- V-: Negative power supply pin.
- VS+: Positive shunt supply pin.
- VS-: Negative shunt supply pin.
- OUT: Output pin.
- REF+: Reference voltage input pin.
- REF-: Reference voltage input pin.
- IN+: Non-inverting input pin.
- IN-: Inverting input pin.
- SENSE+: Positive shunt connection pin.
- SENSE-: Negative shunt connection pin.
What are the Pros and Cons of INA240A1PW?
Pros:
- High Accuracy: Provides high-precision current measurements for critical applications.
- Bidirectional Sensing: Capable of measuring current in both directions for versatile use.
- Integrated Shunt Resistor: Simplifies the design by integrating the current-sensing element.
- Wide Supply Voltage Range: Operates over a wide supply voltage range, suitable for various systems.
- Enhanced EMI Performance: Provides enhanced electromagnetic interference (EMI) performance for reliable operation in noisy environments.
Cons:
- Cost: High-accuracy current-sensing amplifiers may have a higher cost compared to lower-precision alternatives.
- Complexity: Requires careful consideration of layout and noise for optimal performance.
- External Components: May require external components such as input filters for specific applications.
Are There Any Equivalents/Alternatives to INA240A1PW for Recommendation?
- The INA139 from Texas Instruments is a similar bidirectional current-sensing amplifier with multiple gain options.
- Alternatives to the INA240A1PW include the MAX4372 from Maxim Integrated and the ZXCT1107 from Diodes Incorporated.
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