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Analog Devices Inc./Maxim Integrated MAX4073HAXK
- Part No.:
- MAX4073HAXK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4073HAXK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,529
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Product details
Overview
MAX4073HAXK from Maxim Integrated is a high-side current-sense amplifier with voltage output, designed for precision battery-charger current monitoring in portable systems. It delivers 100V/V fixed gain, ±1.0% full-scale accuracy at +25°C, and operates across +3V to +28V supply with +2V to +28V input common-mode range independent of VCC - enabling direct sensing at battery voltages as low as +2V. Its 1.6MHz bandwidth supports fast control-loop response in switching regulator-based chargers.
For engineers reviewing the MAX4073HAXK datasheet, MAX4073HAXK pinout, MAX4073HAXK application, or MAX4073HAXK equivalent, this page provides verified technical context, validated pin functions, real-world use cases in smart battery packs and PA bias control, and confirmed alternatives with documented gain and package differences.
Technical Context
The MAX4073HAXK implements a bipolar-process current-mirror-based architecture that converts 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 in high-current paths.
It features rail-to-rail output swing capability constrained only by VCC – VOH (≤1.2V drop), operates over −40°C to +125°C, and achieves 90dB common-mode rejection at 100mV sense input - critical for rejecting noise in noisy DC-DC converter environments where the sense node shares ground with switching elements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 10V for 100mV sense voltage, enabling direct interface with 10-bit ADCs without scaling. |
| Full-Scale Accuracy | ±1.0% at +25°C - ensures ≤10mV error at 100mV input, supporting <1% current measurement tolerance in battery fuel gauging. |
| Bandwidth | 1.6MHz - supports transient current detection within 625ns rise time, suitable for real-time overcurrent protection in fast-switching chargers. |
| Supply Current | 0.5mA typical - enables always-on monitoring in low-power battery systems without significant drain impact. |
| Common-Mode Range | +2V to +28V, independent of VCC - allows accurate sensing even when battery voltage drops below VCC, e.g., during deep discharge. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive charging modules and industrial portable equipment. |
| Output Impedance | 12kΩ - requires high-Z load or buffer to avoid >1% gain error; compatible with standard op-amp inputs or SAR ADC drivers. |
Pinout & Package
MAX4073HAXK is housed in a 5-pin SC70 package (package code X5+1, outline 21-0076), measuring 2.0mm × 1.25mm × 0.95mm - half the footprint of SOT23 - optimized for space-constrained battery management PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 2) | Ground reference | Return path for internal circuitry and bypass capacitor; must be connected directly to low-impedance system ground near VCC decoupling. |
| VCC (Pin 3) | Positive supply input | Accepts +3V to +28V; requires 0.1µF ceramic capacitor to GND for stability and noise immunity in high-dV/dt environments. |
| RS+ (Pin 4) | High-side sense input (+) | Connects to battery/anode side of external sense resistor; tolerates up to +30V absolute max, enabling robust operation in 24V systems. |
| RS− (Pin 5) | High-side sense input (−) | Connects to load/cathode side of sense resistor; differential input accepts up to ±5V, preventing damage from transient spikes. |
| OUT (Pin 1) | Voltage output | Delivers VOUT = 100 × (VRS+ – VRS−); output drives 12kΩ source impedance - buffer recommended for driving <100kΩ loads. |
Key Features
| Feature | Design Value |
|---|---|
| No external gain resistors required | Fixed 100V/V gain eliminates layout sensitivity, BOM cost, and calibration drift associated with discrete resistor networks. |
| +2V to +28V common-mode range independent of VCC | Enables true high-side sensing down to 2V battery voltage while powered from a separate 3.3V or 5V rail - avoids ground-path disruption in charger ICs. |
| 1.6MHz bandwidth | Supports closed-loop response times <1µs, allowing integration into fast battery-charge termination algorithms and dynamic load-step compensation. |
| ±1.0% full-scale accuracy at +25°C | Meets tight current-monitoring requirements for smart battery pack state-of-charge estimation without factory trimming. |
| Automotive temperature range (−40°C to +125°C) | Validated for under-battery-pack thermal environments in EV accessories and industrial handheld tools with extended runtime. |
Applications
| Smart Battery Chargers | PA Bias Control |
|---|---|
Use Scenario: Real-time current monitoring during CC/CV lithium-ion charging cycles in USB-C PD power banks. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog feedback to charger controller's error amplifier for precise current regulation. Use Value: Enables ±1% charge current accuracy across 2V–28V battery voltage range without ground loop interference, improving safety and cycle life. |
Use Scenario: Dynamic bias current adjustment in RF power amplifiers for 5G mobile hotspots. IC Role / Device Role / Timing Role: High-bandwidth current monitor feeding back to bias DAC to maintain optimal transistor operating point under varying temperature and supply conditions. Use Value: 1.6MHz bandwidth captures rapid PA current transients, reducing thermal drift-induced distortion and extending amplifier efficiency envelope. |
| Portable System Power Management | Board-Level Current Monitoring |
Use Scenario: System-level current auditing in ruggedized tablets used in field service applications. IC Role / Device Role / Timing Role: Primary high-side sensor in multi-rail PMIC supervision chain, reporting to microcontroller via ADC. Use Value: 0.5mA quiescent current minimizes impact on standby battery life; wide VCC range simplifies single-supply design across 3.3V/5V/12V subsystems. |
Use Scenario: Fault detection in industrial IoT gateway boards with multiple isolated power domains. IC Role / Device Role / Timing Role: Dedicated current monitor on 24V auxiliary rail, triggering watchdog reset on overcurrent events exceeding 10A threshold. Use Value: ±1.0% accuracy at full scale ensures reliable trip-point setting; SC70 footprint allows placement adjacent to fuse or connector without board area penalty. |
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 |
|---|---|---|---|
| MAX4073FAXK+T | 50V/V gain, same SC70 package, identical temp range and bandwidth | Lower full-scale output (5V @ 100mV) - better suited for 5V ADC interfaces or lower-current ranges | Select when full-scale current is ≤5A with 100mΩ sense resistor, avoiding output saturation with limited VCC headroom. |
| MAX4173HAUT+T | 100V/V gain, 6-pin SOT23 package, wider 0V to +28V common-mode range | Supports sensing down to 0V common-mode - required for ground-referenced current paths or dual-supply systems | Choose only if sensing must occur at 0V common-mode (e.g., low-side configurations); otherwise MAX4073HAXK offers smaller footprint and equal performance. |
Compared with MAX4073FAXK+T, MAX4073HAXK provides double the output voltage per mV sensed - critical for maximizing ADC resolution in 10V-range systems. Against MAX4173HAUT+T, it trades 2V minimum common-mode for 40% smaller PCB area and identical gain/accuracy, making it optimal for space-constrained high-side-only applications.
Availability
MAX4073HAXK is available at Aetrix Electronics and suitable for smart battery chargers, PA bias control circuits, portable system power management, board-level current monitoring, and precision current sources requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX4073HAXK 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 semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and portable applications.
The MAX4073 family was designed specifically for cost-sensitive, space-constrained high-side current sensing in battery-powered systems - delivering integrated gain, wide common-mode operation, and automotive-grade reliability in sub-SC70 footprints.
FAQ
What is the exact gain value and tolerance of MAX4073HAXK?
The MAX4073HAXK has a nominal gain of 100V/V. Its gain accuracy is ±1.0% at +25°C and ±6.5% over the full −40°C to +125°C temperature range, as specified in the Electrical Characteristics table. This is a factory-trimmed fixed-gain device - no external resistors affect the gain, and the value applies directly to the MAX4073HAXK variant without configuration.
Does MAX4073HAXK support sensing at battery voltages below its supply voltage VCC?
Yes. The MAX4073HAXK features a +2V to +28V input common-mode range that is independent of VCC. For example, it can accurately sense current from a 2.8V Li-ion cell while powered from a separate 3.3V rail - a key capability for high-side monitoring in multi-rail portable systems where VCC may exceed or fall below the battery voltage.
What is the maximum allowable sense voltage (VSENSE) for MAX4073HAXK?
The MAX4073HAXK is characterized for full-scale operation at VSENSE = 100mV, with a maximum specified differential input of ±5V. However, the Absolute Maximum Ratings limit differential input voltage to ±5V, and the Electrical Characteristics table defines full-scale sense voltage as 150mV. For reliable operation within datasheet guarantees, VSENSE should not exceed 100mV - yielding 10V output at 100V/V gain.
Can MAX4073HAXK be used in low-side current sensing configurations?
No. The MAX4073HAXK is explicitly designed for high-side sensing only. Its input architecture and common-mode range (+2V to +28V) do not support ground-referenced (low-side) configurations. Attempting low-side use results in violation of the minimum +2V common-mode requirement and invalidates all specifications. For low-side applications, consider dedicated low-side amplifiers like MAX4080.
What decoupling capacitor is required for MAX4073HAXK VCC pin?
A 0.1µF ceramic capacitor must be placed between VCC and GND, as shown in the Typical Operating Circuit and Pin Description sections. This capacitor stabilizes the internal bias network and suppresses high-frequency noise coupling from switching regulators - omission risks gain inaccuracy and bandwidth reduction, especially in battery-charger applications with fast dV/dt transients.
MAX4073HAXK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1.8 MHz
- -3db Bandwidth:
- -
- 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
MAX4073HAXK FAQ
1.How can I place an order for MAX4073HAXK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073HAXK 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 MAX4073HAXK reliable?
The price and inventory of MAX4073HAXK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073HAXK is usually 5 days.
3.What payment methods are accepted for MAX4073HAXK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073HAXK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073HAXK?
MAX4073HAXK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073HAXK 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 MAX4073HAXK?
For technical support, including MAX4073HAXK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073HAXK requirements.
6.How does Aetrix verify that MAX4073HAXK is sourced from the original manufacturer or authorized distributors?
All MAX4073HAXK 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 MAX4073HAXK meets industry standards.
7.What is the process for return or replacement of MAX4073HAXK?
All MAX4073HAXK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073HAXK, 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 MAX4073HAXK part is unused and in its original packaging.
Return procedure for MAX4073HAXK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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