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Analog Devices Inc./Maxim Integrated MAX4073FAUT
- Part No.:
- MAX4073FAUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4073FAUT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
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Product details
Overview
MAX4073FAUT from Maxim Integrated is a high-side current-sense amplifier with voltage output, designed for precision load-current monitoring in battery-powered systems. It delivers 50V/V fixed gain, operates from +3V to +28V supply, supports +2V to +28V input common-mode range independent of supply, and achieves ±1.0% full-scale accuracy at +25°C - enabling accurate real-time current feedback in smart battery chargers and portable power management.
For engineers reviewing the MAX4073FAUT datasheet, MAX4073FAUT pinout, MAX4073FAUT application, or MAX4073FAUT equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating range (−40°C to +125°C), and two rigorously cross-checked alternative parts for high-side sensing in space-constrained, single-supply designs.
Technical Context
The MAX4073FAUT uses a bipolar process-based current-mirror architecture to convert differential sense voltage (VRS+ − VRS−) into a proportional voltage output without external gain-setting resistors. Its input stage maintains high impedance at RS+ and RS−, ensuring minimal loading on the sense resistor and preserving measurement integrity across wide common-mode voltages.
It features a 1.7MHz small-signal bandwidth (at VSENSE = 100mV) and 600kHz bandwidth at 6.25mV full-scale input, supporting fast transient response in battery-charger control loops. Output saturation recovery time is 5µs, and power-up settling occurs within 5µs to 1% of final value - critical for dynamic load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets full-scale output to 5V when VSENSE = 100mV, simplifying ADC interface scaling. |
| Full-Scale Accuracy | ±1.0% at +25°C - ensures ≤50mV absolute error on 5V output, meeting tight current-monitoring tolerances in safety-critical charging circuits. |
| Common-Mode Range | +2V to +28V, supply-independent - enables direct sensing of Li-ion battery discharge down to 2V while powered from 3.3V or 5V rail. |
| Supply Current | 0.5mA typical at VCC = 28V - minimizes quiescent power draw in always-on battery monitoring paths. |
| Bandwidth | 1.7MHz - supports closed-loop stability in high-frequency switching regulator current feedback without phase lag degradation. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial embedded environments. |
| Output Impedance | 12kΩ - requires high-impedance ADC input or buffer op-amp to avoid gain error from loading. |
Pinout & Package
MAX4073FAUT is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+4), measuring 2.9mm × 1.6mm × 1.1mm - compatible with standard SOT23 footprints and suitable for dense PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for internal circuitry; must be connected to low-impedance system ground near sense resistor. |
| 2 (RS−) | Low-side sense input | Connects to load side of external sense resistor; forms differential pair with RS+ for high-side current measurement. |
| 3 (RS+) | High-side sense input | Connects to power source side of sense resistor; accepts up to +28V common-mode voltage regardless of VCC. |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF ceramic bypass capacitor to GND for noise immunity and stability. |
| 5 (OUT) | Voltage output | Delivers VOUT = 50 × (VRS+ − VRS−); output impedance ≈12kΩ - avoid direct connection to <100kΩ loads. |
| 6 (GND) | Second ground terminal | Provides dedicated ground return for output stage; improves PSRR and reduces ground bounce in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external gain resistors required | Fixed 50V/V gain eliminates layout sensitivity and resistor tolerance errors in production calibration. |
| Supply-independent common-mode range | Enables monitoring of battery voltages as low as +2V even when VCC = +3V - essential for deep-discharge detection. |
| 1.7MHz bandwidth | Supports real-time current tracking in 500kHz+ switching regulators without signal attenuation or phase shift. |
| Automotive temperature qualification | Guaranteed operation from −40°C to +125°C meets AEC-Q100 stress test requirements for automotive power modules. |
| Low 0.5mA supply current | Reduces standby power by >70% vs. comparable amplifiers, extending battery life in always-on monitoring applications. |
Applications
| Smart Battery Chargers | Portable Power Management Systems |
|---|---|
Use Scenario: Real-time current monitoring during CC/CV lithium-ion charging cycles in USB-C PD adapters and wireless charging bases. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog feedback to charger IC's current regulation loop. Use Value: Enables precise charge termination at ±1% full-scale accuracy and supports dynamic load step response within 800ns settling time. |
Use Scenario: System-level current supervision in ruggedized tablets and handheld medical devices with dual-battery switchover. IC Role / Device Role / Timing Role: Primary current monitor feeding MCU ADC for battery health estimation and overcurrent shutdown. Use Value: Wide +2V–+28V common-mode range allows direct sensing across battery, adapter, and USB-PD input rails without level-shifting. |
| PA Bias Control in RF Modules | Board-Level Current Monitoring |
Use Scenario: Closed-loop bias current stabilization for GaN power amplifiers in 5G small-cell base stations. IC Role / Device Role / Timing Role: High-bandwidth current sensor in PA DC bias feedback path, operating from +12V supply. Use Value: 1.7MHz bandwidth prevents loop instability; ±1.0% accuracy ensures consistent RF output power across temperature. |
Use Scenario: Fault detection and energy accounting in industrial IoT gateways with multiple 24V fieldbus interfaces. IC Role / Device Role / Timing Role: Dedicated per-rail current monitor on isolated 24V/12V/5V power domains. Use Value: Dual-GND pins reduce ground noise coupling; 6-pin SOT23 footprint enables placement adjacent to each sense resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4173FAUT+T | Wider 0V to +28V common-mode range; same 50V/V gain, 6-pin SOT23, −40°C to +125°C rating. | Supports sensing at 0V common-mode (e.g., ground-referenced loads), whereas MAX4073FAUT starts at +2V. | Select MAX4173FAUT+T if sensing must include 0V rail or ground-return paths; otherwise MAX4073FAUT offers lower cost and identical performance above +2V. |
| INA240A1QDRQ1 | Automotive-grade (AEC-Q100), 80V common-mode, 20V/V gain, SOIC-8 package; higher accuracy (±0.2%) but larger footprint. | Rated for 80V bus monitoring (e.g., 48V EV subsystems); not drop-in due to different pinout, gain, and package. | Choose INA240A1QDRQ1 only for >28V applications or where ±0.2% accuracy justifies SOIC-8 area and cost premium; MAX4073FAUT remains optimal for ≤28V portable systems. |
Compared with MAX4173FAUT+T, MAX4073FAUT trades 0V common-mode support for lower unit cost and identical performance in battery-sourced applications; versus INA240A1QDRQ1, it offers 6-pin SOT23 compactness and cost efficiency at the expense of extended voltage range and ultra-high accuracy.
Availability
MAX4073FAUT is available at Aetrix Electronics and suitable for smart battery chargers, portable power management systems, PA bias control circuits, and board-level current monitoring requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX4073FAUT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for power, sensing, and connectivity applications - with emphasis on miniaturization, reliability, and low-power operation.
The MAX4073 family targets cost-sensitive, space-constrained high-side current sensing in battery-powered and automotive systems - delivering integrated gain, wide common-mode range, and automotive temperature qualification in sub-3mm packages.
FAQ
What is the exact gain and accuracy specification of the MAX4073FAUT?
The MAX4073FAUT has a fixed gain of 50V/V. Its full-scale accuracy is ±1.0% at +25°C and ±6.5% over the full −40°C to +125°C operating range, measured at VSENSE = 100mV with VCC = 12V and VRS+ = 12V. This accuracy includes both gain and offset error contributions, as specified in the MAX4073FAUT electrical characteristics table.
Does the MAX4073FAUT require external resistors to set gain?
No, the MAX4073FAUT does not require external gain-setting resistors. Its 50V/V gain is internally fixed via laser-trimmed thin-film resistors and current-mirror topology. This eliminates resistor tolerance errors, layout sensitivity, and board space typically needed for discrete gain networks - a key advantage confirmed in the MAX4073FAUT functional description and typical operating circuit.
What is the maximum common-mode voltage the MAX4073FAUT can handle?
The MAX4073FAUT supports a +2V to +28V input common-mode voltage range, independent of its supply voltage (VCC). This means it can accurately sense current through a sense resistor placed between a +28V battery and a +3V logic rail - a capability explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics sections of the MAX4073FAUT datasheet.
Is the MAX4073FAUT suitable for automotive applications?
Yes, the MAX4073FAUT is fully qualified for automotive use: it is specified over −40°C to +125°C, packaged in RoHS-compliant 6-pin SOT23 (U6+4), and built using Maxim's bipolar process optimized for temperature stability. Its guaranteed parameters - including ±6.5% gain accuracy and 1.7MHz bandwidth - are validated across this full automotive temperature range per the MAX4073FAUT datasheet.
What package type and pin count does the MAX4073FAUT use?
The MAX4073FAUT uses a 6-pin SOT23 package (package code U6+4), with dimensions of 2.9mm × 1.6mm × 1.1mm. Pin configuration is GND (1), RS− (2), RS+ (3), VCC (4), OUT (5), and GND (6). This dual-ground layout improves PSRR and is documented in the "Pin Configurations" section of the MAX4073FAUT datasheet.
MAX4073FAUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.7 MHz
- Current - Input Bias:
- 40 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 500µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX4073FAUT FAQ
1.How can I place an order for MAX4073FAUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073FAUT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4073FAUT reliable?
The price and inventory of MAX4073FAUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073FAUT is usually 5 days.
3.What payment methods are accepted for MAX4073FAUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073FAUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073FAUT?
MAX4073FAUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073FAUT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4073FAUT?
For technical support, including MAX4073FAUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073FAUT requirements.
6.How does Aetrix verify that MAX4073FAUT is sourced from the original manufacturer or authorized distributors?
All MAX4073FAUT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4073FAUT meets industry standards.
7.What is the process for return or replacement of MAX4073FAUT?
All MAX4073FAUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073FAUT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4073FAUT part is unused and in its original packaging.
Return procedure for MAX4073FAUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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