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Analog Devices Inc./Maxim Integrated MAX4073HAUT-T
- Part No.:
- MAX4073HAUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4073HAUT-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:1,395
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Product details
Overview
MAX4073HAUT-T 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, 1.6MHz bandwidth, and operates from +3V to +28V supply across -40°C to +125°C. Its +2V to +28V input common-mode range-fully independent of VCC-enables direct sensing at battery terminals without ground-path disruption.
For engineers reviewing the MAX4073HAUT-T datasheet, MAX4073HAUT-T pinout, MAX4073HAUT-T application, or MAX4073HAUT-T equivalent, this device serves as a compact, RoHS-compliant solution for high-accuracy, high-bandwidth current measurement in space-constrained automotive and portable power systems where supply-voltage-independent common-mode operation is required.
Technical Context
The MAX4073HAUT-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 maintains high impedance at RS−, enabling accurate sensing with minimal loading on the sense resistor.
It features rail-to-rail output swing capability limited only by VOH specification (VCC − VOH ≤ 1.2V), supports continuous operation up to 28V supply and 28V common-mode, and exhibits no phase reversal under overdrive-critical for stable feedback in charger control loops.
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 10V output, supporting <1% current measurement fidelity in production systems. |
| Bandwidth | 1.6MHz - supports real-time monitoring within fast-switching battery-charger control loops (e.g., >500kHz PWM). |
| Common-Mode Range | +2V to +28V, independent of VCC - allows direct sensing at Li-ion battery anode (≥2.5V) even when VCC = 3.3V. |
| Supply Current | 0.5mA typical at VCC = 28V - enables always-on current monitoring in low-power standby modes without significant battery drain. |
| 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
The MAX4073HAUT-T is housed in a lead(Pb)-free, RoHS-compliant 6-pin SOT23 package (package code U6+4, outline 21-0058), measuring 2.9mm × 1.6mm × 1.1mm with 0.95mm pitch. This footprint supports automated placement and reflow while delivering thermal performance up to 696mW at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for internal bias and output stage; must be connected directly to low-impedance system ground plane. |
| 2 (RS−) | Low-side sense terminal | Connects to load side of external sense resistor; high-impedance input minimizes current error (<120µA max bias). |
| 3 (RS+) | High-side sense terminal | Connects to power source side of sense resistor; accepts common-mode voltages up to +28V regardless of VCC. |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; requires local 0.1µF ceramic bypass capacitor to GND for stability and noise rejection. |
| 5 (OUT) | Voltage output | Delivers VOUT = 100 × (VRS+ − VRS−); 12kΩ output impedance mandates high-Z load or unity-gain buffer. |
| 6 (NC) | No connect | Internally unconnected; must remain floating-no PCB trace or copper pour should contact this pad. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates external gain resistors, reducing BOM count and layout area while guaranteeing monotonic transfer function across temperature. |
| +2V to +28V common-mode range | Enables true high-side sensing at battery voltage down to 2V-even below VCC-without level-shifting circuitry or dual-supply design. |
| 1.6MHz bandwidth | Supports dynamic current profiling during fast charge transitions (e.g., CC-CV mode switching) with <800ns settling time to 1%. |
| ±1.0% full-scale accuracy | Meets stringent battery fuel-gauge requirements; maintains <±6.5% error over full automotive temperature range (-40°C to +125°C). |
| 0.5mA supply current | Permits integration into always-on battery protection ICs or host microcontrollers' low-power wake-up monitoring paths. |
Applications
| Battery Charger Feedback Loop | Smart Battery Pack Monitoring |
|---|---|
Use Scenario: Real-time current measurement inside switched-mode Li-ion battery chargers to regulate constant-current (CC) and constant-voltage (CV) phases. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced analog output for MCU ADC sampling at ≥10ksps. Use Value: Enables precise charge termination and thermal derating via 1.6MHz bandwidth and ±1.0% accuracy-reducing overcharge risk and extending cycle life. |
Use Scenario: Continuous current tracking in multi-cell smart battery packs for state-of-charge (SoC) estimation and safety cutoff. IC Role / Device Role / Timing Role: Primary current transducer interfacing between battery stack and fuel-gauge IC, operating across full cell voltage range (2.5V–28V). Use Value: Common-mode independence allows direct sensing at pack positive terminal without disturbing battery ground integrity-critical for isolation compliance and fault detection. |
| Automotive USB Power Delivery | PA Bias Current Control |
Use Scenario: Input current limiting and overcurrent protection in automotive-grade USB-C PD controllers powering infotainment or ADAS modules. IC Role / Device Role / Timing Role: High-side monitor feeding analog comparator or MCU for sub-10µs OCP response, compliant with AEC-Q100 Grade 2. Use Value: -40°C to +125°C rating and 28V tolerance support under-hood deployment; 0.5mA quiescent current avoids parasitic drain on vehicle battery. |
Use Scenario: Closed-loop bias current regulation for RF power amplifiers in portable radios or IoT gateways requiring stable output power. IC Role / Device Role / Timing Role: Precision current feedback element in analog bias control loop, rejecting supply ripple via 90dB CMR and 70dB PSRR. Use Value: 100V/V gain produces 10V full-scale output from 100mV sense drop-compatible with standard op-amp DAC interfaces and immune to PCB trace resistance drift. |
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, same 100V/V gain, but 0V to +28V common-mode range (includes ground); higher 0.7mA ICC. | Supports bidirectional sensing and ground-referenced loads; not suitable where strict high-side-only isolation is required. | Select MAX4173HAUT+T only if sensing must extend to 0V common-mode or if ground-referenced load monitoring is needed alongside high-side. |
| INA240A1QDRQ1 | AEC-Q100 qualified, 8-pin SOIC, 20V/V gain, 4MHz bandwidth, ±0.1% offset, but requires external gain resistors and has narrower +2.7V to +80V common-mode. | Higher precision and bandwidth, but larger footprint and added passive components increase layout complexity and cost. | Choose INA240A1QDRQ1 only when <±0.3% total error over temperature is mandatory and board space permits SOIC packaging. |
Compared with MAX4073HAUT-T, MAX4173HAUT+T offers extended common-mode down to 0V at the cost of higher supply current and reduced high-side isolation integrity, while INA240A1QDRQ1 provides superior DC accuracy and bandwidth but demands external resistors and occupies more PCB area-making MAX4073HAUT-T optimal for cost-sensitive, space-constrained high-side-only applications.
Availability
MAX4073HAUT-T is available at Aetrix Electronics and suitable for battery management systems, automotive USB power delivery modules, and portable device charger designs requiring stable component supply, automotive-grade temperature resilience, and compact high-side current sensing.
Supply support for MAX4073HAUT-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 semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and communication applications.
The MAX4073 family was engineered specifically for high-accuracy, low-cost high-side current sensing in portable and automotive power systems-emphasizing supply-voltage-independent common-mode operation and minimal external component count.
FAQ
What is the exact gain and accuracy specification of the MAX4073HAUT-T?
The MAX4073HAUT-T has a fixed gain of 100V/V. Its full-scale accuracy is ±1.0% at +25°C, degrading to ±6.5% over the full automotive temperature range (-40°C to +125°C) when VSENSE = 100mV. This is confirmed in the Electrical Characteristics table under "Gain Accuracy (∆AV)" for MAX4073H grade, with test conditions explicitly referencing VCC = 12V, VRS+ = 12V, and VSENSE = 10mV to 100mV.
Does the MAX4073HAUT-T require external gain-setting resistors?
No, the MAX4073HAUT-T does not require external gain-setting resistors. Its 100V/V gain is internally fixed via laser-trimmed resistor ratios and current-mirror topology, as stated in the General Description and Functional Diagram. This eliminates gain drift due to external component tolerances and reduces PCB area-confirmed by the "Low-Cost, Compact, Current-Sense Solution" feature bullet and absence of gain-resistor pins in the Pin Description.
What package type and pin count does the MAX4073HAUT-T use?
The MAX4073HAUT-T uses a 6-pin SOT23 package (package code U6+4, outline 21-0058), as specified in the Ordering Information table and Pin Configurations section. It is RoHS-compliant and lead(Pb)-free, with pin 6 designated as NC (no connect). This differs from the 5-pin SC70 variant (e.g., MAX4073HAXK+T) and is verified by the top mark "AAUG" and package column "6 SOT23" in the ordering matrix.
Can the MAX4073HAUT-T operate with a 3.3V supply while sensing at 24V common-mode?
Yes, the MAX4073HAUT-T can operate with VCC = +3.3V while sensing at VRS+ = +24V. Its input common-mode range is +2V to +28V and explicitly stated as "independent of the supply voltage" in the General Description and Electrical Characteristics (Note 3). This is further validated by Absolute Maximum Ratings allowing RS+/RS− to GND up to +30V regardless of VCC, and by Typical Operating Characteristics showing stable performance across VRS+ = 2V to 30V sweeps.
What is the maximum recommended load capacitance on the OUT pin of the MAX4073HAUT-T?
The MAX4073HAUT-T is characterized with CLOAD = 5pF in all bandwidth, settling time, and transient response specifications-including the 1.6MHz bandwidth and 800ns 1% settling time. Driving capacitive loads beyond 5pF risks peaking, overshoot, or instability due to its 12kΩ output impedance interacting with load capacitance. For higher-capacitance interfaces (e.g., long traces or ADC inputs), a unity-gain buffer op amp is required, as explicitly advised in the Applications Information section.
MAX4073HAUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SOT-6
MAX4073HAUT-T FAQ
1.How can I place an order for MAX4073HAUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073HAUT-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 MAX4073HAUT-T reliable?
The price and inventory of MAX4073HAUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073HAUT-T is usually 5 days.
3.What payment methods are accepted for MAX4073HAUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073HAUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073HAUT-T?
MAX4073HAUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073HAUT-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 MAX4073HAUT-T?
For technical support, including MAX4073HAUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073HAUT-T requirements.
6.How does Aetrix verify that MAX4073HAUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4073HAUT-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 MAX4073HAUT-T meets industry standards.
7.What is the process for return or replacement of MAX4073HAUT-T?
All MAX4073HAUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073HAUT-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 MAX4073HAUT-T part is unused and in its original packaging.
Return procedure for MAX4073HAUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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