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Analog Devices Inc./Maxim Integrated MAX4173TEUT+T
- Part No.:
- MAX4173TEUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4173TEUT+T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:6,270
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Product details
Overview
The MAX4173TEUT+T from Maxim Integrated is a precision high-side current-sense amplifier in SOT23-6 package, delivering 20V/V fixed gain, ±0.5% full-scale accuracy, ±3mV input offset voltage, 1.7MHz bandwidth, and 0V to +28V input common-mode range independent of supply voltage - ideal for battery-charger feedback loops and notebook power monitoring.
For engineers reviewing the MAX4173TEUT+T datasheet, MAX4173TEUT+T pinout, MAX4173TEUT+T application, or MAX4173TEUT+T equivalent, this page delivers verified specifications, validated SOT23-6 pin mapping, real-world use cases in portable power systems, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The MAX4173TEUT+T implements a high-impedance current-mirror-based architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output without external gain resistors. Its input stage operates with rail-to-rail common-mode capability down to 0V, enabling accurate sensing during deep battery discharge.
It features a 12kΩ output impedance, 420µA quiescent supply current over −40°C to +85°C, and internal compensation for stable operation with 5pF load capacitance. The device avoids phase reversal under overdrive and achieves 1% settling in ≤800ns for step changes from 6.25mV to 100mV sense voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets output voltage = 20 × (VRS+ − VRS−); enables 1V full-scale output with 50mV sense voltage |
| Full-Scale Accuracy | ±0.5% - guarantees total output error ≤ ±0.5% at 100mV sense input across temperature and supply variations |
| Input Offset Voltage | ±3mV (max) - contributes ≤ ±60µV error at 20V/V gain; critical for low-current sensing below 1A |
| Bandwidth | 1.7MHz - supports real-time current monitoring inside fast-switching battery charger control loops |
| Common-Mode Range | 0V to +28V - remains functional even when battery voltage drops to 0V, independent of VCC |
| Supply Current | 420µA - enables always-on current monitoring in ultra-low-power portable systems |
| Operating Temp | −40°C to +85°C - qualified for industrial and consumer battery-powered equipment environments |
Pinout & Package
SOT23-6 package with 1.6mm × 2.9mm footprint, RoHS-compliant, tape-and-reel delivery (T suffix). Pin 1 marked with dot; top-mark "AABN" confirms MAX4173T variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Low-side sense terminal | Connects to load-side of external sense resistor; high-impedance input minimizes current error |
| 2 (GND) | Analog ground reference | Return path for internal bias currents; must tie to clean system ground near sense resistor |
| 3 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF bypass capacitor to GND for stability |
| 4 (RS+) | High-side sense terminal | Connects to power-source side of sense resistor; supports up to +28V common-mode |
| 5 (N.C.) | No internal connection | Unbonded die pad; must remain floating or grounded per layout best practices |
| 6 (OUT) | Voltage output terminal | Delivers gain-scaled output (20×VSENSE); 12kΩ output impedance requires high-Z A/D or buffer |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20V/V gain | Eliminates external gain-setting resistors, reducing BOM count and PCB area in space-constrained SOT23 designs |
| 0V to +28V common-mode range | Enables uninterrupted current monitoring during battery deep-discharge states where VBAT < 1V |
| 1.7MHz bandwidth | Supports closed-loop response in high-frequency switching chargers (e.g., >500kHz buck converters) |
| ±0.5% full-scale accuracy | Meets tight current reporting requirements for smart battery fuel gauging and safety-critical overcurrent detection |
| 420µA supply current | Permits continuous current logging in battery-backed systems with multi-week runtime expectations |
Applications
| Smart Battery Chargers | Notebook Power Management |
|---|---|
|
Use Scenario: Real-time charge current monitoring in Li-ion battery charging circuits with input voltages up to 28V. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated feedback signal to charger controller IC. Use Value: Enables precise constant-current regulation and end-of-charge termination without disrupting battery ground return path. |
Use Scenario: System-level load current measurement in ultrabook main power rails (e.g., CPU core, DDR memory). IC Role / Device Role / Timing Role: Analog front-end sensor converting milliohm-shunt voltage into processor-readable voltage output. Use Value: Supports dynamic power budgeting and thermal throttling decisions using 1.7MHz-bandwidth current data. |
| Portable Medical Devices | PA Bias Control |
|
Use Scenario: Battery discharge current tracking in handheld diagnostic instruments requiring FDA-grade accuracy logs. IC Role / Device Role / Timing Role: Precision analog monitor interfacing directly to 12-bit SAR ADC with minimal signal conditioning. Use Value: Delivers ±0.5% full-scale accuracy across −40°C to +85°C, meeting IEC 60601-1 environmental compliance. |
Use Scenario: RF power amplifier bias current stabilization in cellular IoT modules operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Fast-response current sensor feeding analog loop compensator in PA DC-DC bias supply. Use Value: 800ns 1% settling time ensures stable PA bias under rapid transmit/receive duty cycling. |
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+ | Same 20V/V gain, but SO-8 package; 1.5MHz bandwidth; ±0.75% full-scale accuracy; 600µA supply current | Requires larger PCB area; better suited for prototyping or higher-voltage industrial systems with less space constraint | Select MAX4080TASA+ only if SO-8 footprint compatibility or enhanced PSR (>100dB) is required over SOT23 size priority |
| INA213AIDCKR | 20V/V gain, SC70-6 package; 0.5% gain error; 1.2MHz bandwidth; 100µA supply current; 0–26V common-mode | Lower quiescent current ideal for energy-harvesting devices; slightly reduced common-mode range limits deep-discharge coverage | Choose INA213AIDCKR when ultra-low power dominates design goals and battery voltage stays above 0.5V during operation |
Compared with MAX4173TEUT+T, MAX4080TASA+ trades SOT23 compactness for SO-8 robustness and marginally lower accuracy, while INA213AIDCKR reduces supply current by 76% but sacrifices 2V of common-mode headroom critical for 0V battery monitoring.
Availability
MAX4173TEUT+T is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and portable medical devices requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX4173TEUT+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, mixed-signal, and power-management ICs for demanding industrial, automotive, and portable applications.
The MAX4173 product line targets cost-sensitive, space-constrained battery-powered systems requiring accurate, high-bandwidth, high-side current sensing without external gain components.
FAQ
What is the maximum common-mode voltage the MAX4173TEUT+T can handle?
The MAX4173TEUT+T supports an input common-mode voltage range of 0V to +28V, fully independent of its supply voltage (VCC). This allows it to monitor current even when the sensed node is at 0V - such as during deep battery discharge - while VCC remains at +3V or higher. Absolute maximum rating extends to +30V on RS+ and RS− pins.
Does the MAX4173TEUT+T require external gain-setting resistors?
No, the MAX4173TEUT+T does not require external gain-setting resistors. It integrates a fixed 20V/V gain architecture using internal precision resistor ratios and a current-mirror topology. This eliminates gain resistor tolerance errors and saves PCB area - a key advantage over discrete op-amp-based current-sense solutions.
What is the typical supply current of the MAX4173TEUT+T across temperature?
The MAX4173TEUT+T draws a typical supply current of 420µA over the full operating temperature range of −40°C to +85°C. At +25°C and VCC = +12V, it measures 420µA; variation remains within 0.42mA to 1.0mA across all conditions per datasheet specifications.
Can the MAX4173TEUT+T be used with a single 3.3V supply?
Yes, the MAX4173TEUT+T operates from a single +3V to +28V supply. With VCC = +3.3V, it maintains full functionality including 0V to +28V common-mode input range and 20V/V gain. Output swing is rail-to-rail limited by VCC, so maximum VOUT ≈ 3.3V - sufficient for most 12-bit ADC interfaces.
What is the output impedance of the MAX4173TEUT+T, and how does it affect system design?
The MAX4173TEUT+T has a nominal output impedance of 12kΩ, as specified in the Electrical Characteristics table. This means external loading (e.g., ADC input resistance < 100kΩ) introduces measurable gain error. To maintain accuracy, connect OUT directly to a high-impedance input (≥1MΩ) or use a unity-gain buffer op amp with rail-to-rail input/output capability.
MAX4173TEUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- 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
MAX4173TEUT+T FAQ
1.How can I place an order for MAX4173TEUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173TEUT+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 MAX4173TEUT+T reliable?
The price and inventory of MAX4173TEUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173TEUT+T is usually 5 days.
3.What payment methods are accepted for MAX4173TEUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173TEUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173TEUT+T?
MAX4173TEUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173TEUT+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 MAX4173TEUT+T?
For technical support, including MAX4173TEUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173TEUT+T requirements.
6.How does Aetrix verify that MAX4173TEUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4173TEUT+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 MAX4173TEUT+T meets industry standards.
7.What is the process for return or replacement of MAX4173TEUT+T?
All MAX4173TEUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173TEUT+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 MAX4173TEUT+T part is unused and in its original packaging.
Return procedure for MAX4173TEUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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