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Analog Devices Inc./Maxim Integrated MAX4173HEUT-T
- Part No.:
- MAX4173HEUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4173HEUT-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
MAX4173HEUT-T from Maxim Integrated is a precision high-side current-sense amplifier in SOT23-6 package, delivering 100V/V fixed gain, ±0.5% full-scale accuracy, 1.2MHz bandwidth, and 0V to +28V input common-mode range independent of supply voltage. It enables accurate battery-current monitoring in notebook computers, smart battery chargers, and portable power-management systems without disrupting ground paths.
For engineers reviewing the MAX4173HEUT-T datasheet, MAX4173HEUT-T pinout, MAX4173HEUT-T application, or MAX4173HEUT-T equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX4173HEUT-T uses an internal current-mirror architecture to convert differential sense voltage (VRS+ − VRS−) into a proportional voltage output, eliminating external gain-setting resistors. Its rail-to-rail input stage supports operation down to 0V common-mode while maintaining functionality at up to +28V - critical for deep-discharge battery monitoring.
It features a 12kΩ output impedance and operates from a single +3V to +28V supply, drawing only 420µA typical supply current across −40°C to +85°C. The device avoids phase reversal when overdriven and achieves 10µs power-up time and 10µs saturation recovery time - enabling use inside fast battery-charger control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output = 100 × (RSENSE × ILOAD); enables precise low-current sensing with small RSENSE. |
| Full-Scale Accuracy | ±0.5% - ensures ≤5mV error at 100mV sense voltage; directly impacts current-measurement fidelity in battery fuel gauging. |
| Common-Mode Range | 0V to +28V, supply-independent - allows monitoring of battery discharge down to 0V without loss of function or calibration shift. |
| Bandwidth | 1.2MHz - supports dynamic current tracking in switching regulator feedback paths and fast charge termination detection. |
| Supply Current | 420µA typical - enables always-on current monitoring in ultra-low-power portable devices without compromising battery life. |
| Input Offset Voltage | ±3mV max - defines minimum resolvable sense voltage (e.g., 30mΩ RSENSE requires ≥3A for 100mV full scale). |
| Output Impedance | 12kΩ - requires high-impedance A/D input or buffer op-amp to avoid gain error; loading with <120kΩ introduces >1% error. |
Pinout & Package
MAX4173HEUT-T is housed in a RoHS-compliant, lead(Pb)-free SOT23-6 package (top mark: AABP), optimized for space-constrained portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Low-side sense resistor terminal | Connects to load side of external sense resistor; referenced to GND; must be kept low-impedance to minimize noise coupling. |
| 2 (GND) | Analog ground reference | Return path for internal circuitry; must tie to clean system ground near sense resistor to avoid offset errors. |
| 3 (RS+) | High-side sense resistor terminal | Connects to power source side of sense resistor; accepts 0V–28V common-mode; high-impedance input minimizes loading. |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF bypass capacitor to GND for stability and noise rejection. |
| 5 (N.C.) | No internal connection | Unbonded pin; must remain unconnected; no routing or thermal pad required. |
| 6 (OUT) | Voltage output | Delivers 100×(VRS+ − VRS−); 12kΩ output impedance necessitates high-Z A/D or buffered interface. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates external gain resistors, reducing BOM count and layout area while ensuring consistent gain across temperature and voltage. |
| 0V to +28V common-mode range | Enables uninterrupted current sensing during battery deep discharge (e.g., Li-ion below 2.5V) without signal loss or recalibration. |
| 1.2MHz bandwidth | Supports real-time current monitoring in high-frequency DC-DC converters and adaptive charging algorithms with <1µs response. |
| 420µA supply current | Permits continuous current logging in battery-powered systems with multi-week standby life (e.g., <1µA avg. system sleep current). |
| No phase reversal on overdrive | Prevents erroneous control signals during transient overload or short-circuit events - critical for charger safety logic integrity. |
Applications
| Smart Battery Charger Monitoring | Notebook Computer Power Path Control |
|---|---|
|
Use Scenario: Real-time measurement of charge/discharge current in lithium-ion battery packs with integrated fuel gauging ICs. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog output to microcontroller ADC for Coulomb counting and state-of-charge estimation. Use Value: Enables ±0.5% full-scale accuracy over full battery voltage range (0V–4.2V per cell), supporting precise cycle-life prediction and safe charge termination. |
Use Scenario: Monitoring main system rail current (e.g., +12V or +19V) to detect overcurrent faults and trigger thermal throttling or shutdown. IC Role / Device Role / Timing Role: High-side current sensor feeding fast comparator or µC ADC to enforce real-time current limits during CPU/GPU boost states. Use Value: 1.2MHz bandwidth captures transient surges from processor load changes; 0V–28V common-mode accommodates wide-input AC/DC adapters. |
| Portable Medical Device Battery Management | PA Bias Current Stabilization |
|
Use Scenario: Continuous current monitoring in handheld ultrasound or infusion pumps to log battery usage and predict remaining runtime. IC Role / Device Role / Timing Role: Low-quiescent-current current-sense amplifier interfacing to low-power MCU with integrated 12-bit ADC for periodic sampling. Use Value: 420µA supply current extends battery life between charges; SOT23-6 footprint fits tight medical PCB constraints without sacrificing accuracy. |
Use Scenario: Stabilizing bias current in RF power amplifiers used in portable radios or IoT transceivers to maintain linearity and efficiency. IC Role / Device Role / Timing Role: High-side monitor providing feedback to DAC-controlled bias voltage source to compensate for temperature drift. Use Value: ±3mV input offset ensures stable bias point across −40°C to +85°C; 100V/V gain enables resolution of sub-mA bias adjustments. |
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 |
|---|---|---|---|
| MAX4080TASA+ | 20V/V gain, SO-8 package, 2.5MHz bandwidth, ±0.75% gain error, 1.5mV offset | Better bandwidth and lower offset but lower gain; requires PCB redesign for SO-8 footprint and external gain resistor | Select when higher speed and tighter offset tolerance outweigh need for fixed-gain simplicity and SOT23 size |
| INA213AIDCKR | 100V/V gain, SOT23-6, 0.5MHz bandwidth, ±0.5% gain error, ±100µV offset, 2.7V–26V supply | Lower offset and wider supply range but halved bandwidth; not qualified for >+85°C operation | Select when ultra-low offset dominates design priority and 0.5MHz bandwidth suffices for slower control loops |
Compared with MAX4173HEUT-T, MAX4080TASA+ trades pin-compatible simplicity for higher speed and adjustable gain, while INA213AIDCKR offers superior offset performance at the cost of bandwidth and extended temperature support - making MAX4173HEUT-T optimal for compact, cost-sensitive, wide-common-mode portable power monitoring where 1.2MHz response and −40°C to +85°C operation are essential.
Availability
MAX4173HEUT-T is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4173HEUT-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, designs precision analog and mixed-signal ICs for power, sensing, and connectivity in demanding environments.
The MAX4173 product line delivers compact, high-accuracy high-side current-sense amplifiers optimized for battery-powered systems where ground-path integrity, wide common-mode range, and minimal quiescent power are critical.
FAQ
What is the guaranteed common-mode input range for MAX4173HEUT-T?
The MAX4173HEUT-T guarantees a 0V to +28V input common-mode range independent of supply voltage. This means it remains fully functional even when VRS+ drops to 0V - a key requirement for monitoring deeply discharged batteries. The specification is tested and guaranteed across the full −40°C to +85°C operating temperature range, with no degradation in accuracy or output behavior at the extremes.
Does MAX4173HEUT-T require external gain-setting resistors?
No, MAX4173HEUT-T does not require external gain-setting resistors. It integrates a fixed 100V/V gain internally via precision laser-trimmed resistors and a current-mirror architecture. This eliminates gain-setting components, reduces PCB area, improves temperature stability, and ensures consistent performance without user calibration - a core advantage over programmable or resistor-configured alternatives.
What is the maximum supply voltage for MAX4173HEUT-T?
The absolute maximum supply voltage for MAX4173HEUT-T is +30V, but its specified operating range is +3V to +28V. Operation within this range ensures all electrical characteristics - including gain accuracy, common-mode rejection, and output swing - meet datasheet guarantees. Exceeding +28V may cause parametric drift or reliability risk, even if below the absolute maximum rating.
Can MAX4173HEUT-T be used with a 3.3V supply?
Yes, MAX4173HEUT-T operates fully specified from +3V to +28V supply, including 3.3V. At 3.3V, it maintains its 100V/V gain, ±0.5% full-scale accuracy, and 0V–28V common-mode range. Output swing is limited to approximately 0.8V below VCC, so with 3.3V supply, maximum output is ~2.5V - sufficient for most 3.3V ADC interfaces when paired with appropriate scaling.
Is MAX4173HEUT-T pin-compatible with other MAX4173 variants?
Yes, MAX4173HEUT-T shares identical SOT23-6 pinout and footprint with MAX4173TEUT-T and MAX4173FEUT-T. All three variants use pins 1 (RS−), 2 (GND), 3 (RS+), 4 (VCC), 5 (N.C.), and 6 (OUT) with identical functions and electrical behavior - enabling drop-in replacement solely by changing gain version without PCB modification.
MAX4173HEUT-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:
- 1.2 MHz
- Current - Input Bias:
- 700 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 420µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4173HEUT-T FAQ
1.How can I place an order for MAX4173HEUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173HEUT-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 MAX4173HEUT-T reliable?
The price and inventory of MAX4173HEUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173HEUT-T is usually 5 days.
3.What payment methods are accepted for MAX4173HEUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173HEUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173HEUT-T?
MAX4173HEUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173HEUT-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 MAX4173HEUT-T?
For technical support, including MAX4173HEUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173HEUT-T requirements.
6.How does Aetrix verify that MAX4173HEUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4173HEUT-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 MAX4173HEUT-T meets industry standards.
7.What is the process for return or replacement of MAX4173HEUT-T?
All MAX4173HEUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173HEUT-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 MAX4173HEUT-T part is unused and in its original packaging.
Return procedure for MAX4173HEUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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