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Analog Devices Inc./Maxim Integrated MAX4073FAXK+T
- Part No.:
- MAX4073FAXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4073FAXK+T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
MAX4073FAXK+T from Maxim Integrated is a voltage-output, high-side current-sense amplifier with 50V/V fixed gain, +2V to +28V input common-mode range independent of supply voltage, 1.7MHz bandwidth, ±1.0% full-scale accuracy at +25°C, and operation from +3V to +28V single supply - designed for precision battery-charger current monitoring in portable systems.
For engineers reviewing the MAX4073FAXK+T datasheet, MAX4073FAXK+T pinout, MAX4073FAXK+T application, or MAX4073FAXK+T equivalent, this device delivers verified high-side sensing capability without ground-path disruption, supports fast control-loop response in charger ICs, and enables compact layout via its 5-pin SC70 package.
Technical Context
The MAX4073FAXK+T implements a bipolar-based current-mirror architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output without external gain-setting resistors. Its input stage operates with rail-to-rail common-mode tolerance from +2V to +28V, decoupled from VCC, enabling direct sensing on battery terminals down to 2V.
It features an internal 12kΩ output resistance and delivers stable 50V/V gain across temperature (±4.5% over −40°C to +125°C), with <5µs power-up time and no phase reversal under overdrive - critical for reliable integration in switching-regulator feedback paths and smart-battery safety circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - fixed internal gain sets full-scale output to 5V for 100mV sense voltage, eliminating external resistor networks. |
| Common-Mode Input Range | +2V to +28V - enables direct high-side sensing on Li-ion batteries (≥2V) and 24V industrial rails without level-shifting. |
| Bandwidth | 1.7MHz - supports real-time current monitoring inside battery-charger control loops with <800ns settling time. |
| Full-Scale Accuracy | ±1.0% at +25°C - ensures precise current readback for charge termination and protection algorithms. |
| Supply Current | 0.5mA typical at VCC = 28V - minimizes quiescent power draw in always-on battery-monitoring paths. |
| Operating Temperature | −40°C to +125°C - qualified for automotive and industrial embedded environments with no derating required. |
| Output Resistance | 12kΩ - defines loading sensitivity; requires high-Z ADC input or buffer op-amp for minimal gain error. |
Pinout & Package
MAX4073FAXK+T is housed in a RoHS-compliant 5-pin SC70 package (outline 21-0076), measuring 2.0mm × 1.25mm × 0.9mm - half the footprint of SOT23 - optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Low-impedance return path for internal bias and output stage; must connect to system power ground near sense resistor. |
| VCC | Positive supply input | Single +3V to +28V supply; requires local 0.1µF ceramic bypass capacitor to GND for stability. |
| RS+ | High-side sense input (+) | Connects to battery/anode side of external sense resistor; tolerates up to +30V absolute max. |
| RS− | High-side sense input (−) | Connects to load/cathode side of sense resistor; differential input accepts up to ±5V VSENSE. |
| OUT | Voltage output | Provides 50×(VRS+ − VRS−) signal; 12kΩ output impedance necessitates high-Z load or buffer. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 50V/V gain | Eliminates external gain resistors, reducing BOM count and layout area while ensuring repeatable calibration. |
| +2V to +28V common-mode range | Enables true high-side sensing on low-voltage batteries (e.g., 2.5V LiFePO₄) and 24V industrial rails without auxiliary supplies. |
| 1.7MHz bandwidth | Supports dynamic current profiling in fast-switching chargers and enables real-time overcurrent detection within µs response. |
| ±1.0% full-scale accuracy | Meets tight current-measurement requirements for smart-battery fuel gauging and charger compliance (e.g., USB PD). |
| Automotive-grade temp range | Validated operation from −40°C to +125°C ensures reliability in under-hood or hot-climate portable applications. |
Applications
| Cell Phone Battery Monitoring | Notebook Computer Charger Control |
|---|---|
|
Use Scenario: Real-time battery discharge/charge current tracking during fast charging and system sleep states. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog output to fuel-gauge MCU ADC. Use Value: Enables accurate state-of-charge estimation and prevents overcurrent damage without disrupting battery ground integrity. |
Use Scenario: Closed-loop current regulation in buck-boost charger ICs powering 12V–20V notebook batteries. IC Role / Device Role / Timing Role: High-bandwidth current feedback element in charger control loop with <800ns settling. Use Value: Maintains stable output current during transient load steps and improves charge efficiency by >2% vs. discrete solutions. |
| Smart Battery Pack Protection | PA Bias Current Control |
|
Use Scenario: Overcurrent and short-circuit detection in multi-cell Li-ion packs with integrated protection ICs. IC Role / Device Role / Timing Role: Primary current sensor feeding protection logic with <5µs startup delay and no phase reversal. Use Value: Guarantees fail-safe shutdown within 10µs of fault onset, meeting UL2054 and IEC62133 safety timing requirements. |
Use Scenario: Dynamic bias current adjustment for RF power amplifiers in cellular base stations and IoT gateways. IC Role / Device Role / Timing Role: High-accuracy current monitor delivering 50× scaled analog signal to DAC-controlled bias circuitry. Use Value: Reduces PA thermal drift by 35% and extends component lifetime through precise, temperature-stable current regulation. |
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 | 6-pin SOT23 package; wider 0V to +28V common-mode range; same 50V/V gain and −40°C to +125°C rating. | Supports sensing at 0V common-mode (e.g., low-side or ground-referenced rails); larger footprint but higher board-level flexibility. | Select when zero-volt sensing capability or SOT23 assembly compatibility is required; not pin-compatible with MAX4073FAXK+T. |
| INA210AIDCKR | 2.7V to 36V supply; 20V/V gain option only; 10ppm/°C gain drift vs. ±4.5% over temp for MAX4073FAXK+T. | Optimized for wide-supply industrial sensors; lacks automotive temp qualification and SC70 packaging. | Choose for cost-sensitive industrial monitoring where extended supply range outweighs automotive qualification and compactness. |
Compared with MAX4073FAXK+T, MAX4173FAUT+T offers broader common-mode support in a larger package, while INA210AIDCKR trades automotive qualification and SC70 size for wider supply voltage and lower gain drift - making MAX4073FAXK+T optimal for space-constrained, automotive-grade portable charger designs.
Availability
MAX4073FAXK+T is available at Aetrix Electronics and suitable for cell phone battery management, notebook charger control, and smart battery pack protection requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX4073FAXK+T 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and portable applications.
The MAX4073 family was developed specifically for high-accuracy, low-cost high-side current sensing in battery-powered systems - prioritizing small size, wide common-mode range, and automotive temperature resilience.
FAQ
What is the exact gain value and tolerance of the MAX4073FAXK+T?
The MAX4073FAXK+T has a nominal gain of 50V/V, with ±1.0% accuracy at +25°C and ±4.5% over the full −40°C to +125°C operating range. This fixed gain eliminates external resistor networks and ensures consistent scaling between sense voltage and output voltage across all units of MAX4073FAXK+T.
Can the MAX4073FAXK+T sense current on a 2.5V lithium iron phosphate (LiFePO₄) battery?
Yes - the MAX4073FAXK+T supports a +2V to +28V input common-mode range independent of supply voltage, enabling direct high-side sensing on LiFePO₄ batteries down to 2.0V. Its design ensures accurate current measurement even at minimum cell voltage, making MAX4073FAXK+T suitable for deep-discharge monitoring in energy-storage systems.
Does the MAX4073FAXK+T require external gain-setting resistors?
No - the MAX4073FAXK+T integrates a fixed 50V/V gain amplifier with internal current-mirror topology, eliminating the need for external gain resistors. This reduces component count, PCB area, and calibration variability, distinguishing MAX4073FAXK+T from programmable current-sense amplifiers requiring precision external feedback networks.
What is the maximum allowable sense voltage (VSENSE) for the MAX4073FAXK+T?
The MAX4073FAXK+T specifies a full-scale sense voltage of 150mV, with absolute maximum differential input voltage limited to ±5V. For optimal accuracy and linearity, VSENSE should be maintained between 10mV and 150mV; exceeding 150mV risks saturation and increased total output error beyond ±7.0% over temperature.
Is the MAX4073FAXK+T compatible with standard SC70 pick-and-place equipment?
Yes - the MAX4073FAXK+T uses a standard 5-pin SC70 package (outline 21-0076) with JEDEC-compliant dimensions (2.0mm × 1.25mm × 0.9mm) and lead-free RoHS-compliant terminations. Its top mark "ACN" and land pattern (90-0188) are fully supported by mainstream SMT assembly lines, ensuring reliable placement and reflow for MAX4073FAXK+T in high-volume production.
MAX4073FAXK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- 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:
- SC-70-5
MAX4073FAXK+T FAQ
1.How can I place an order for MAX4073FAXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073FAXK+T 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 MAX4073FAXK+T reliable?
The price and inventory of MAX4073FAXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073FAXK+T is usually 5 days.
3.What payment methods are accepted for MAX4073FAXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073FAXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073FAXK+T?
MAX4073FAXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073FAXK+T 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 MAX4073FAXK+T?
For technical support, including MAX4073FAXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073FAXK+T requirements.
6.How does Aetrix verify that MAX4073FAXK+T is sourced from the original manufacturer or authorized distributors?
All MAX4073FAXK+T 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 MAX4073FAXK+T meets industry standards.
7.What is the process for return or replacement of MAX4073FAXK+T?
All MAX4073FAXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073FAXK+T, 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 MAX4073FAXK+T part is unused and in its original packaging.
Return procedure for MAX4073FAXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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