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Analog Devices Inc./Maxim Integrated MAX4073HAXK+T
- Part No.:
- MAX4073HAXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4073HAXK+T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,491
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Product details
Overview
MAX4073HAXK+T from Maxim Integrated is a high-side current-sense amplifier with fixed 100V/V gain, +2V to +28V input common-mode range independent of supply voltage, ±1.0% full-scale accuracy at +25°C, 1.6MHz bandwidth, and operation from +3V to +28V single supply-designed for precision battery-charger current monitoring in automotive and portable power systems.
For engineers reviewing the MAX4073HAXK+T datasheet, MAX4073HAXK+T pinout, MAX4073HAXK+T application, or MAX4073HAXK+T equivalent, this device delivers calibrated high-side sensing without external gain resistors, supports wide common-mode voltages beyond VCC, and enables fast response in closed-loop charger control with minimal board space.
Technical Context
The MAX4073HAXK+T implements a bipolar-based current-mirror architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output (VOUT = 100 × VSENSE). Its input stage operates with rail-to-rail common-mode capability up to +28V while referenced to GND, enabling direct monitoring of battery discharge paths above ground.
It features internal resistor ratios defining fixed 100V/V gain, eliminates external gain-setting components, and maintains stable performance across −40°C to +125°C with <5µs power-up time and no phase reversal under overdrive-critical for reliable operation in automotive battery management and switching regulator feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - fixed internal ratio; sets full-scale output to 10V for 100mV sense voltage, eliminating external gain resistors. |
| Common-Mode Input Range | +2V to +28V - operates independently of VCC; enables high-side sensing on batteries as low as 2V or >VCC rails. |
| Full-Scale Accuracy | ±1.0% at +25°C - ensures precise current measurement at nominal conditions; ±6.5% over full temperature range. |
| Bandwidth | 1.6MHz - supports dynamic current monitoring inside battery-charger control loops with fast transient response. |
| Supply Voltage Range | +3V to +28V - single-supply operation compatible with 12V/24V automotive and wide-input portable systems. |
| Supply Current | 0.5mA typical - ultra-low quiescent draw suitable for always-on monitoring in battery-powered applications. |
| Operating Temperature | −40°C to +125°C - AEC-Q100–compatible automotive grade; validated for under-hood and industrial environments. |
Pinout & Package
MAX4073HAXK+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 PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary return path for internal circuitry and bypass capacitor; must be low-impedance connection to system ground plane. |
| VCC (Pin 2) | Positive supply input | Accepts +3V to +28V single supply; requires local 0.1µF ceramic decoupling to GND for stability. |
| RS+ (Pin 3) | High-side sense input (+) | Connects to power source side of external sense resistor; withstands up to +30V absolute max, supports >VCC sensing. |
| RS− (Pin 4) | High-side sense input (−) | Connects to load/battery side of sense resistor; differential input pair defines VSENSE = VRS+ − VRS−. |
| OUT (Pin 5) | Voltage output | Delivers VOUT = 100 × VSENSE; 12kΩ output impedance requires high-Z load or buffer for minimal gain error. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates external gain resistors and layout sensitivity-reduces BOM count and improves production consistency. |
| +2V to +28V common-mode range | Enables true high-side sensing on low-voltage batteries (e.g., LiFePO₄) and high-voltage rails (>VCC) without level-shifting. |
| ±1.0% full-scale accuracy at +25°C | Supports tight current regulation in smart battery chargers and PA bias control where <1% error is required. |
| 1.6MHz bandwidth | Allows real-time current feedback within switching regulator control loops operating up to ~150kHz. |
| Automotive temperature range | Validated from −40°C to +125°C-meets requirements for engine bay, battery junction box, and infotainment power supplies. |
Applications
| Smart Battery Chargers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Real-time charging current monitoring in lithium-ion battery packs with integrated fuel gauging and thermal protection. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced analog output for ADC sampling in battery management ICs. Use Value: Enables accurate Coulomb counting and charge termination without disrupting battery ground path-preserving safety isolation and measurement integrity. |
Use Scenario: Load-current supervision for door lock actuators, seat motor drivers, and lighting circuits in 12V/24V vehicle electrical systems. IC Role / Device Role / Timing Role: Fault-detection front-end converting motor or solenoid current into scalable voltage for microcontroller ADC input. Use Value: Detects short-circuit, stall, or open-load conditions within <1µs response time-supporting ASIL-B–level diagnostics per ISO 26262. |
| Portable Power Banks | Industrial DC Power Supplies |
|
Use Scenario: Bidirectional current monitoring during USB PD 3.0 charging and discharging cycles in multi-cell power banks. IC Role / Device Role / Timing Role: High-side sense element feeding dual-direction current data to system MCU for state-of-charge estimation and thermal derating. Use Value: Maintains accuracy across 2V–28V input range-covers both discharged Li-ion (≈2.5V/cell) and boosted 20V PD input rails. |
Use Scenario: Output current feedback in programmable bench power supplies with 0–30V/0–5A adjustable limits. IC Role / Device Role / Timing Role: Precision current-sense interface between power stage and digital controller, supporting fast OCP response. Use Value: 1.6MHz bandwidth and <5µs startup enable sub-10µs overcurrent shutdown-meeting IEC 61000-4-5 surge immunity timing constraints. |
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 |
|---|---|---|---|
| MAX4173HAUT+T | 6-pin SOT23 package; wider 0V to +28V common-mode range; same 100V/V gain and −40°C to +125°C rating. | Supports sensing down to 0V common-mode-required for ground-referenced loads or low-dropout LDO outputs. | Select MAX4173HAUT+T when sensing near 0V common-mode or when SOT23 layout compatibility is prioritized over SC70 size reduction. |
| INA240A1DR | Texas Instruments part; 80V common-mode range; bidirectional sensing; 120dB CMRR; SOIC-8 package. | Designed for high-noise motor drive and industrial inverters; supports negative current flow and higher voltage isolation. | Choose INA240A1DR for 48V+ systems, bidirectional current detection, or where >80dB CMRR is mandatory for EMI resilience. |
Compared with MAX4073HAXK+T, MAX4173HAUT+T offers extended low-end common-mode capability at the cost of larger footprint, while INA240A1DR provides superior noise immunity and bidirectionality but requires more board area and higher supply voltage margin.
Availability
MAX4073HAXK+T is available at Aetrix Electronics and suitable for automotive battery management, portable power bank design, and industrial DC power supply development requiring stable component supply, long-term lifecycle support, and AEC-Q100–aligned qualification.
Supply support for MAX4073HAXK+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 communications applications.
The MAX4073 family was designed specifically for compact, cost-sensitive high-side current sensing in battery-powered and automotive systems-emphasizing integration, wide common-mode operation, and guaranteed accuracy across extreme temperatures.
FAQ
What is the exact gain value and tolerance of MAX4073HAXK+T?
The MAX4073HAXK+T has a fixed gain of 100V/V, with ±1.0% accuracy at +25°C and ±6.5% over the full −40°C to +125°C operating range. This gain is implemented via internal resistor ratios and does not require external components-ensuring consistent performance across units and batches. The MAX4073HAXK+T datasheet specifies these values in the Electrical Characteristics table under "Gain" and "Gain Accuracy" parameters.
Can MAX4073HAXK+T sense current on a 2V battery without VCC being present?
No-MAX4073HAXK+T requires a valid VCC supply between +3V and +28V to operate. However, its input common-mode range extends down to +2V independently of VCC, meaning it can accurately monitor current from a 2V battery source *while* powered by a separate ≥3V rail (e.g., a 5V system supply). The MAX4073HAXK+T will not function if VCC is absent or below 3V, even if RS+ is at 2V.
What is the maximum sense voltage (VSENSE) supported by MAX4073HAXK+T?
The MAX4073HAXK+T supports a full-scale sense voltage (VSENSE) of 150mV, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Exceeding ±5V differential input (VRS+ − VRS−) risks permanent damage. For optimal accuracy and linearity, VSENSE should be kept between 10mV and 150mV-corresponding to output voltages of 1V to 15V at 100V/V gain. The MAX4073HAXK+T achieves ±1.0% full-scale accuracy at 100mV VSENSE.
Does MAX4073HAXK+T require external capacitors for stability?
Yes-the MAX4073HAXK+T requires a 0.1µF ceramic capacitor between VCC and GND, placed as close as possible to the VCC pin, per the Typical Operating Circuit and Pin Description sections. No additional compensation capacitors are needed at the OUT pin for standard high-impedance loads; however, if driving capacitive or low-impedance loads, an external op-amp buffer is recommended to maintain gain accuracy and avoid peaking. The MAX4073HAXK+T datasheet confirms this in the Applications Information section.
Is MAX4073HAXK+T qualified for automotive use?
Yes-MAX4073HAXK+T is specified over the automotive temperature range of −40°C to +125°C and manufactured using Maxim's automotive-grade process. While not explicitly AEC-Q100 certified in the public datasheet, its characterization, test coverage, and operating range align with AEC-Q100 Grade 2 requirements. It is widely deployed in automotive body control, battery monitoring, and infotainment power systems. The MAX4073HAXK+T top mark "ACO" and ordering suffix "+T" denote lead-free, RoHS-compliant packaging suitable for automotive assembly.
MAX4073HAXK+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:
- 1.6 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
MAX4073HAXK+T FAQ
1.How can I place an order for MAX4073HAXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073HAXK+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 MAX4073HAXK+T reliable?
The price and inventory of MAX4073HAXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073HAXK+T is usually 5 days.
3.What payment methods are accepted for MAX4073HAXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073HAXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073HAXK+T?
MAX4073HAXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073HAXK+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 MAX4073HAXK+T?
For technical support, including MAX4073HAXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073HAXK+T requirements.
6.How does Aetrix verify that MAX4073HAXK+T is sourced from the original manufacturer or authorized distributors?
All MAX4073HAXK+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 MAX4073HAXK+T meets industry standards.
7.What is the process for return or replacement of MAX4073HAXK+T?
All MAX4073HAXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073HAXK+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 MAX4073HAXK+T part is unused and in its original packaging.
Return procedure for MAX4073HAXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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