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ManufacturerAnalog Devices Inc./Maxim Integrated
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Mfr. Part #MAX9938FEUK+T
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In Stock4159
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Specifications
| Attribute | Value |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Amplifier Type | Current Sense |
| Number of Circuits | 1 |
| -3 dB Bandwidth | 60 kHz |
| Voltage - Input Offset | 100 µV |
| Supply Current | 1.1µA |
| Voltage - Supply Span(Min) | 1.6 V |
| Voltage - Supply Span(Max) | 28 V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
Overview
Description
The MAX9938FEUK+T is a high-precision, low-power, unidirectional current-sense amplifier designed by Maxim Integrated, now part of Analog Devices. It is specifically engineered to sense small differential voltages across a sense resistor at common-mode voltages up to 28V, making it suitable for a wide range of applications including battery management and power monitoring. The device offers a fixed gain of 50V/V and features a low offset voltage, ensuring accurate current measurements.
The MAX9938FEUK+T operates with a supply voltage ranging from 1.6V to 5.5V, making it highly versatile for various electronic systems. Furthermore, it boasts a low quiescent current of only 4µA, which helps in reducing overall power consumption in battery-operated devices. It is packaged in a compact 5-pin SOT23, ideal for space-constrained applications.
This amplifier provides robust performance with excellent temperature stability, making it a reliable choice for precision current measurements in industrial, automotive, and consumer electronics applications.
The MAX9938FEUK+T operates with a supply voltage ranging from 1.6V to 5.5V, making it highly versatile for various electronic systems. Furthermore, it boasts a low quiescent current of only 4µA, which helps in reducing overall power consumption in battery-operated devices. It is packaged in a compact 5-pin SOT23, ideal for space-constrained applications.
This amplifier provides robust performance with excellent temperature stability, making it a reliable choice for precision current measurements in industrial, automotive, and consumer electronics applications.
Equivalent
The MAX9938FEUK+T is a high-side current-sense amplifier. Equivalent products include the TI INA138, TI INA193, Analog Devices AD8210, and STMicroelectronics TSC101. These alternatives offer similar functionality for measuring current through a shunt resistor in various electronic applications, though specific performance parameters like bandwidth, input offset voltage, and package type may vary. Always compare the datasheets to ensure compatibility with your specific application requirements.
Features
The MAX9938FEUK+T is a high-precision, bidirectional current-sense amplifier. Key features include:
1. Wide Input Common-Mode Range: Operates from -20V to +75V, making it suitable for a variety of applications, including automotive and industrial.
2. Low Supply Current: Consumes only 20µA, ensuring efficient power usage.
3. High Accuracy: Offers a low offset voltage and high CMRR, enhancing measurement precision.
4. Gain Options: Available with preset gains of 20V/V, 50V/V, and 100V/V, providing flexibility in design.
5. Small Package: Comes in a compact SOT23 package, ideal for space-constrained applications.
6. Bidirectional Sensing: Capable of measuring current in both directions, useful for comprehensive current monitoring.
7. Wide Supply Voltage Range: Operates from 2.7V to 28V, accommodating different system voltage levels.
8. Temperature Range: Functions reliably over a -40°C to +125°C range, suitable for harsh environments.
These features make the MAX9938FEUK+T a versatile solution for precision current sensing in various applications.
1. Wide Input Common-Mode Range: Operates from -20V to +75V, making it suitable for a variety of applications, including automotive and industrial.
2. Low Supply Current: Consumes only 20µA, ensuring efficient power usage.
3. High Accuracy: Offers a low offset voltage and high CMRR, enhancing measurement precision.
4. Gain Options: Available with preset gains of 20V/V, 50V/V, and 100V/V, providing flexibility in design.
5. Small Package: Comes in a compact SOT23 package, ideal for space-constrained applications.
6. Bidirectional Sensing: Capable of measuring current in both directions, useful for comprehensive current monitoring.
7. Wide Supply Voltage Range: Operates from 2.7V to 28V, accommodating different system voltage levels.
8. Temperature Range: Functions reliably over a -40°C to +125°C range, suitable for harsh environments.
These features make the MAX9938FEUK+T a versatile solution for precision current sensing in various applications.
Pinout
The MAX9938FEUK+T is a high-side current-sense amplifier, primarily used for current monitoring and power management applications. It comes in a 5-pin SOT23 package, which includes the following pins:
1. IN+: Non-inverting input, connected to the high side of the shunt resistor.
2. IN-: Inverting input, connected to the low side of the shunt resistor.
3. GND: Ground pin, connected to the system ground.
4. OUT: Output pin, providing a voltage proportional to the measured current.
5. VCC: Power supply pin, typically connected to a voltage between 1.6V to 28V.
The MAX9938FEUK+T functions by amplifying the voltage across a shunt resistor placed in series with the load, converting it into a proportional output voltage. This device is commonly used for battery-operated and portable devices due to its low supply current and wide common-mode input range.
1. IN+: Non-inverting input, connected to the high side of the shunt resistor.
2. IN-: Inverting input, connected to the low side of the shunt resistor.
3. GND: Ground pin, connected to the system ground.
4. OUT: Output pin, providing a voltage proportional to the measured current.
5. VCC: Power supply pin, typically connected to a voltage between 1.6V to 28V.
The MAX9938FEUK+T functions by amplifying the voltage across a shunt resistor placed in series with the load, converting it into a proportional output voltage. This device is commonly used for battery-operated and portable devices due to its low supply current and wide common-mode input range.
Manufacturer
The MAX9938FEUK+T is manufactured by Analog Devices, Inc. Analog Devices is a multinational company that specializes in the design and manufacturing of semiconductor devices, particularly analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company serves a wide range of industries, including telecommunications, automotive, industrial, healthcare, and consumer electronics. Analog Devices is known for its products that enhance the performance and efficiency of electronic systems, and it provides solutions that are integral to the functioning of a variety of electronic devices and systems.
Application
The MAX9938FEUK+T is a high-side current-sense amplifier. It is commonly used in applications such as battery management systems, power management in portable devices, overcurrent protection, motor control, and power supply monitoring. Its ability to monitor current in high-side applications makes it suitable for use in various consumer electronics, industrial systems, and telecommunications equipment. The device is particularly useful in systems requiring accurate current measurements with low offset voltage and high precision.
Package
The MAX9938FEUK+T is a current-sense amplifier from Maxim Integrated. It comes in a small, 5-pin SOT23 package, which is compact and suitable for space-constrained applications.
