MAX9938FEUK+T Analog Devices Integrated Circuit (SOT23 (5-Pin)) In Stock
The MAX9938FEUK+T is a nanoPower precision current-sense amplifier with 130 dB typical CMRR and 600 µV maximum input offset voltage, available in a 5-pin SOT-23 package for ultra-compact current monitoring applications.
- Manufacturer
- Analog Devices
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MAX9938FEUK+T Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3877(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 130 dB typical CMRR with 94 dB minimum for accurate common-mode rejection
- 600 µV maximum input offset voltage for precision current measurement
- nanoPower supply current consumption for battery-powered monitoring circuits
- Voltage-feedback architecture with internal frequency compensation
- 5-pin SOT-23 package enabling smallest possible PCB footprint
- Wide YTEOL of 10 years confirming long active lifecycle availability
Applications
The MAX9938FEUK+T is used in battery management systems, portable power monitors, and energy-metering circuits where accurate low-side current sensing at nanoPower consumption is critical. Its extremely high CMRR and low offset voltage also make it effective for precision shunt-based current measurement in medical devices, wearables, and IoT sensor nodes.
Specifications
| Manufacturer Package Code | 5-SOT_23-N/A |
| Date Of Intro | 2008-05-14 |
| YTEOL | 10 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Common-mode Reject Ratio-Min | 94dB |
| Common-mode Reject Ratio-Nom | 130dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 600 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Low-Bias | NO |
| Low-Offset | YES |
| Micropower | YES |
| Neg Supply Voltage Limit-Max | -15 V |
| Neg Supply Voltage-Nom (Vsup) | -3.6 V |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Supply Current-Max | 0.0025mA |
| Supply Voltage Limit-Max | 30V |
| Supply Voltage-Nom (Vsup) | 3.6V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Gain-Min | 25 |
| Wideband | NO |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CMRR of the MAX9938FEUK+T and how does it support accurate current sensing in high-common-mode environments?
The MAX9938FEUK+T achieves a 130 dB typical CMRR with a 94 dB minimum, which effectively suppresses common-mode noise from switching regulators or motor drivers sharing the same bus. This level of rejection allows precise measurement of milliamp-level currents even in noisy industrial and automotive power rails.
How precise is the MAX9938FEUK+T for shunt-based current measurement given its input offset voltage specification?
The MAX9938FEUK+T has a maximum input offset voltage of 600 µV, which translates to a small but measurable error across a low-value shunt resistor. For a 10 mΩ shunt carrying 1 A, the 600 µV offset represents a 60 mA equivalent error, so designers using sub-10 mΩ shunts should account for this in their accuracy budget.
For a coin-cell powered IoT sensor node, does the nanoPower designation of MAX9938FEUK+T make it viable over a standard current sense amplifier?
Yes. The nanoPower rating of the MAX9938FEUK+T means supply current consumption is in the low microamp range, making it far more suitable than standard 100 µA to 1 mA current-sense amplifiers for coin-cell or energy-harvesting IoT nodes where quiescent current directly limits battery life.
What is the package of MAX9938FEUK+T and does it support automated reel-based SMT assembly?
The MAX9938FEUK+T is supplied in a 5-pin SOT-23 package on tape-and-reel (T suffix), which is compatible with standard pick-and-place SMT assembly equipment. The compact SOT-23 footprint occupies minimal board space while supporting high-volume production runs with standard 8 mm reel formats.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4009 | $0.40 |
| 10+ | $0.3943 | $3.94 |
| 25+ | $0.3877 | $9.69 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”