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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:1,280
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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, and 1.7MHz bandwidth. It operates from +3V to +28V supply, draws only 420µA quiescent current, and supports 0V to +28V input common-mode range independent of supply-enabling accurate battery discharge monitoring in notebook computers and smart chargers.
For engineers reviewing the MAX4173TEUT-T datasheet, MAX4173TEUT-T pinout, MAX4173TEUT-T application, or MAX4173TEUT-T equivalent, this device is selected for high-side sensing where ground-path integrity is critical, low-power operation across wide temperature (–40°C to +85°C), and direct voltage-output interface to ADCs without external gain resistors.
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 with fixed 20V/V gain. Its input common-mode range extends from 0V to +28V regardless of VCC, enabling operation during deep battery discharge and above-supply sensing.
It features internal biasing that eliminates need for external gain-setting components, delivers 1.7MHz small-signal bandwidth, and maintains <±0.5% total output error over temperature and supply voltage variations-critical for closed-loop battery charger control and PA bias regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets output voltage = 20 × (VRS+ – VRS−); enables 100mV full-scale sense voltage to yield 2V output for direct ADC interfacing |
| Full-Scale Accuracy | ±0.5% - ensures ≤10mV absolute error at 100mV sense input, supporting precise current threshold detection in power management |
| Input Offset Voltage | ±3mV (max) - limits minimum detectable sense voltage to ~15mV at 20× gain, suitable for ≥500mA monitoring with 5mΩ shunt |
| Bandwidth | 1.7MHz - supports dynamic current tracking in switching regulator feedback loops and fast-charging transient response |
| Supply Current | 420µA - enables always-on current monitoring in battery-powered systems with negligible impact on runtime |
| Common-Mode Range | 0V to +28V, supply-independent - allows direct connection to battery anode even at 0.8V, preserving ground reference integrity |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable computing environments without derating |
Pinout & Package
MAX4173TEUT-T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+2, outline 21-0058), with 1.3mm × 2.2mm footprint and 0.95mm height-optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry and output stage; must be connected to system ground with low-impedance trace |
| 2 (RS−) | Sense resistor load-side terminal | Connects to low-side of external shunt; forms differential input with RS+; high-impedance node minimizes loading error |
| 3 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF ceramic bypass capacitor to GND for stability and noise rejection |
| 4 (RS+) | Sense resistor power-side terminal | Connects to battery/anode side of shunt; supports 0V to +28V common-mode; no internal connection to VCC |
| 5 (N.C.) | No internal connection | Unbonded die pad; must remain floating or grounded per layout best practices-no electrical function |
| 6 (OUT) | Voltage output | Delivers 20×(VRS+ – VRS−) with ~12kΩ output impedance; requires high-Z ADC input or buffer op-amp |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-output architecture | Eliminates external gain resistors and associated layout sensitivity-reduces BOM count and improves production yield |
| Supply-independent 0V–28V common-mode range | Enables uninterrupted current sensing during battery voltage collapse below VCC, critical for fuel-gauge accuracy |
| 1.7MHz bandwidth | Supports real-time current feedback in 500kHz+ switching regulators and fast-charging protocols without phase lag |
| ±0.5% full-scale accuracy over temperature | Reduces calibration overhead in production test; maintains <1% current measurement error across –40°C to +85°C |
| 420µA quiescent current | Permits continuous monitoring in sleep modes of notebooks and IoT devices without compromising battery life |
Applications
| Smart Battery Chargers | Notebook Computer Power Management |
|---|---|
Use Scenario: Real-time charge/discharge current monitoring in lithium-ion battery packs with integrated protection ICs. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog feedback to battery fuel gauge and charge controller. Use Value: Enables accurate coulomb counting and state-of-charge estimation by maintaining measurement validity down to 0V battery voltage. |
Use Scenario: System-level rail current monitoring for CPU/GPU VRMs and display backlight drivers. IC Role / Device Role / Timing Role: Precision current sensor feeding ADC inputs of embedded power management ICs for thermal throttling and fault detection. Use Value: Delivers 1.7MHz bandwidth and ±0.5% accuracy to support dynamic power budgeting without sacrificing measurement fidelity. |
| Portable Medical Devices | PA Bias Control in RF Modules |
Use Scenario: Load current supervision in handheld diagnostic instruments powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: High-side monitor ensuring safe operating current limits during sensor excitation pulses and data transmission bursts. Use Value: 420µA supply current and –40°C to +85°C qualification allow reliable operation in field-deployed equipment with minimal thermal drift. |
Use Scenario: Bias current stabilization for GaAs pHEMT power amplifiers in cellular baseband modules. IC Role / Device Role / Timing Role: Fast-response current sensor in closed-loop bias control loop to maintain linear output under varying temperature and supply conditions. Use Value: 1.7MHz bandwidth and 20V/V gain enable sub-microsecond correction of PA current drift, improving EVM and spectral mask compliance. |
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 |
|---|---|---|---|
| INA219AIDR | I²C digital output, 12-bit ADC integrated, ±0.2% gain error, 100kHz bandwidth, 2.7V–5.5V supply only | Requires microcontroller I²C interface; unsuitable for analog feedback loops or >5.5V battery systems | Select when digital telemetry and multi-range auto-scaling are prioritized over analog loop speed and wide supply compatibility |
| MAX4080TASA+ | 20V/V gain, 2.5MHz bandwidth, ±0.75% gain error, SO-8 package, 1.2mA supply current | Higher bandwidth but higher power draw; larger SO-8 footprint limits use in ultra-compact designs | Select when faster transient response is required and board area allows SO-8; avoid when minimizing quiescent current is critical |
Compared with INA219AIDR and MAX4080TASA+, the MAX4173TEUT-T uniquely balances ultra-low 420µA supply current, 0V–28V common-mode operation, and 1.7MHz analog bandwidth in a 6-pin SOT23-making it optimal for cost-sensitive, space-constrained, high-voltage battery monitoring where analog feedback is mandatory.
Availability
MAX4173TEUT-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 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 industrial, computing, and communications markets.
The MAX4173 product line delivers high-side current-sense amplifiers optimized for battery-powered systems-emphasizing supply independence, low quiescent power, and analog output simplicity for embedded power monitoring.
FAQ
What is the maximum common-mode voltage the MAX4173TEUT-T can measure?
The MAX4173TEUT-T supports an input common-mode voltage range from 0V to +28V, fully independent of its supply voltage (VCC). This means it can accurately sense current even when the battery voltage drops to 0.8V while VCC remains at +5V-ensuring uninterrupted monitoring during deep discharge. The MAX4173TEUT-T's architecture guarantees functionality across this full range without performance degradation.
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 amplifier with internal current-mirror topology, delivering a voltage output directly proportional to the sense voltage (VRS+ – VRS−). This eliminates resistor matching errors, layout sensitivity, and BOM cost-making the MAX4173TEUT-T a true single-component solution for high-side current sensing.
What is the typical supply current of the MAX4173TEUT-T over temperature?
The MAX4173TEUT-T typically draws 420µA of supply current across the full operating temperature range of –40°C to +85°C, with a maximum of 1.0mA. This ultra-low quiescent current enables always-on current monitoring in battery-powered applications without significantly impacting runtime-confirming the MAX4173TEUT-T's suitability for energy-critical portable designs.
Can the MAX4173TEUT-T be used with a single-cell Li-ion battery?
Yes, the MAX4173TEUT-T is specifically designed for single-cell Li-ion battery applications. Its 0V to +28V common-mode input range functions correctly even when the battery voltage falls below 1V, and its +3V to +28V supply range accommodates standard 3.3V or 5V system rails. This makes the MAX4173TEUT-T ideal for fuel gauging, charge termination, and safety monitoring in smartphones and tablets.
What is the output impedance of the MAX4173TEUT-T and how does it affect interfacing?
The MAX4173TEUT-T has a nominal output impedance of 12kΩ, as specified in its Electrical Characteristics table. This high output impedance means external loading (e.g., ADC input resistance <100kΩ) introduces measurable gain error-so the MAX4173TEUT-T should drive high-impedance inputs or be buffered with a unity-gain op-amp. Failure to account for this affects full-scale accuracy, especially in precision current measurement systems using the MAX4173TEUT-T.
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:
- Obsolete
- 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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