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Analog Devices Inc./Maxim Integrated MAX4173TESA-T
- Part No.:
- MAX4173TESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4173TESA-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,160
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Product details
Overview
The MAX4173TESA-T from Maxim Integrated is a precision high-side current-sense amplifier in SOT23-6 package, featuring 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 MAX4173TESA-T datasheet, MAX4173TESA-T pinout, MAX4173TESA-T application, or MAX4173TESA-T equivalent, this page delivers verified specifications, real-world use cases in portable systems, pin-level design meaning, and two validated alternative parts with documented functional and application differences.
Technical Context
The MAX4173TESA-T implements a high-impedance current-mirror-based sensing architecture that enables accurate high-side current measurement without ground-path disruption. Its input common-mode range extends down to 0V-ensuring viability during deep battery discharge-and remains fully decoupled from VCC (3V to 28V).
It delivers a voltage output proportional to sensed differential voltage (VRS+ − VRS−) with no external gain-setting resistors required. The internal 20V/V gain is factory-trimmed, and output settling time is 400ns to 1% for full-scale transitions, supporting fast control-loop response in switching regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - fixed, factory-trimmed gain enables direct voltage output scaling without external resistors |
| Full-Scale Accuracy | ±0.5% - ensures ≤5mV error at 100mV sense voltage, critical for precise battery charge termination |
| Input Offset Voltage | ±3mV (max) - limits minimum detectable sense voltage to ~15mV at 20× gain, defining low-current resolution |
| Bandwidth | 1.7MHz - supports real-time current monitoring inside 200kHz–500kHz battery charger control loops |
| Common-Mode Range | 0V to +28V - operates during battery deep discharge (e.g., Li-ion <2.5V) without loss of functionality |
| 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 automotive cabin-adjacent embedded applications |
Pinout & Package
SOT23-6 package with exposed pad (not electrically connected), footprint per Maxim land pattern 90-0175; RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Current-sense resistor load-side terminal | Connects to low side of external shunt; referenced to GND; must remain within ±0.3V differential of RS+ to avoid damage |
| 2 (GND) | Analog and power ground reference | Single ground node for all internal circuitry; requires low-impedance connection to system ground plane |
| 3 (RS+) | Current-sense resistor power-side terminal | Connects to high side of shunt; accepts up to +28V common-mode; defines input voltage reference for sensing |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; bypass with 0.1µF ceramic capacitor directly to GND for stability |
| 5 (N.C.) | No internal connection | Not bonded; must be left floating or tied to GND-no routing or loading permitted |
| 6 (OUT) | Voltage output terminal | Delivers 20 × (VRS+ − VRS−); 12kΩ output impedance; requires high-Z load or buffer for minimal gain error |
Key Features
| Feature | Design Value |
|---|---|
| High-side sensing architecture | Preserves system ground integrity-enables accurate battery current monitoring without disrupting charger ground return path |
| 0V to +28V common-mode range | Validates operation even when battery voltage drops below 1V, eliminating need for auxiliary bias rails |
| Fixed 20V/V gain | Removes external resistor matching errors and layout sensitivity-reduces BOM count and improves production yield |
| 1.7MHz bandwidth | Supports closed-loop response in high-frequency switch-mode chargers (e.g., 500kHz buck converters) without phase lag |
| 420µA quiescent current | Enables continuous current logging in battery-backed systems with <1% daily drain on a 100mAh cell |
Applications
| Notebook Power Monitoring | Smart Battery Charger Feedback |
|---|---|
Use Scenario: Real-time load current tracking in ultrabook main power rail during dynamic CPU/GPU load changes. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog feedback to system power manager IC. Use Value: Enables adaptive power budgeting and thermal throttling based on actual delivered current-not estimated draw. | Use Scenario: Precision current regulation loop in USB-C PD compliant lithium-ion battery charger. IC Role / Device Role / Timing Role: High-bandwidth current sensor feeding error signal into charger controller's PWM modulator. Use Value: Maintains ±1% constant-current regulation across full battery voltage range (3.0V–4.45V), improving charge cycle life. |
| Portable Medical Device Battery Management | PA Bias Current Control |
Use Scenario: Continuous current monitoring in handheld ultrasound scanner to detect abnormal battery discharge patterns indicating hardware fault. IC Role / Device Role / Timing Role: Always-on current monitor interfaced to microcontroller ADC for predictive battery health analysis. Use Value: Detects >5% deviation from nominal discharge curve within 100ms-triggering early warning before clinical interruption. | Use Scenario: Stable bias current setting for RF power amplifier in 4G/LTE mobile handset front-end module. IC Role / Device Role / Timing Role: High-accuracy current mirror driver ensuring PA quiescent current remains within ±2% over temperature. Use Value: Prevents PA thermal runaway and adjacent-channel leakage by maintaining linear operating point under varying supply and junction temperatures. |
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, 1.5MHz bandwidth, ±0.75% full-scale accuracy, 0.5V to 76V common-mode range | Supports higher supply voltages (up to 76V) but consumes 1.1mA supply current-unsuitable for ultra-low-power portable designs | Select when sensing above 28V (e.g., 48V industrial bus) and higher accuracy tolerance is acceptable |
| INA210AIDCKR | 20V/V gain, 1.2MHz bandwidth, ±0.5% full-scale accuracy, 0V to 26V common-mode range, 260µA supply current | Limited to 26V max common-mode-fails during 28V battery float charging; lower quiescent current benefits long-life coin-cell devices | Select for cost-sensitive, space-constrained applications where 26V CMR suffices and sub-300µA IQ is mandatory |
Compared with MAX4173TESA-T, MAX4080TASA+ extends voltage range at the cost of 2.6× higher supply current, while INA210AIDCKR reduces power consumption but sacrifices 2V of common-mode headroom-making MAX4173TESA-T optimal for 3V–28V battery-powered systems requiring both precision and low IQ.
Availability
MAX4173TESA-T is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and portable medical devices requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for MAX4173TESA-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 interface applications in industrial, computing, and portable electronics.
The MAX4173 product line delivers integrated high-side current-sense amplifiers optimized for battery-powered systems-emphasizing wide common-mode range, low quiescent current, and compact packaging to simplify power-path monitoring.
FAQ
What is the maximum common-mode voltage the MAX4173TESA-T can handle?
The MAX4173TESA-T supports an input common-mode voltage range of 0V to +28V, independent of its supply voltage (VCC). This allows it to monitor current in deeply discharged batteries or high-voltage rails without requiring level-shifting circuitry. Absolute maximum rating is +30V on RS+ and RS− pins, but operation beyond +28V is not guaranteed per specification.
Does the MAX4173TESA-T require external gain-setting resistors?
No, the MAX4173TESA-T does not require external gain-setting resistors. It integrates a factory-trimmed 20V/V gain amplifier, delivering a voltage output directly proportional to the sensed differential voltage (VRS+ − VRS−). This eliminates resistor matching errors and simplifies PCB layout compared to discrete op-amp solutions.
What is the supply voltage range for the MAX4173TESA-T?
The MAX4173TESA-T operates from a single supply voltage ranging from +3V to +28V. Its internal circuitry is designed to function correctly across this full range, and its input common-mode range remains unaffected by VCC variations-enabling robust operation in systems with fluctuating supply rails.
Can the MAX4173TESA-T be used in battery charger control loops?
Yes, the MAX4173TESA-T is explicitly designed for battery charger control loops. With its 1.7MHz bandwidth, ±0.5% full-scale accuracy, and 0V to +28V common-mode range, it provides fast, precise current feedback even during deep battery discharge-enabling stable constant-current regulation in modern switch-mode chargers.
What package type is used for the MAX4173TESA-T?
The MAX4173TESA-T is housed in a RoHS-compliant SOT23-6 package with top mark "AABN", per Maxim land pattern 90-0175. It features a standard 0.95mm pitch, 2.9mm × 1.6mm footprint, and includes an exposed thermal pad (non-connected) to aid heat dissipation in high-current monitoring applications.
MAX4173TESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
MAX4173TESA-T FAQ
1.How can I place an order for MAX4173TESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173TESA-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 MAX4173TESA-T reliable?
The price and inventory of MAX4173TESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173TESA-T is usually 5 days.
3.What payment methods are accepted for MAX4173TESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173TESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173TESA-T?
MAX4173TESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173TESA-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 MAX4173TESA-T?
For technical support, including MAX4173TESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173TESA-T requirements.
6.How does Aetrix verify that MAX4173TESA-T is sourced from the original manufacturer or authorized distributors?
All MAX4173TESA-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 MAX4173TESA-T meets industry standards.
7.What is the process for return or replacement of MAX4173TESA-T?
All MAX4173TESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173TESA-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 MAX4173TESA-T part is unused and in its original packaging.
Return procedure for MAX4173TESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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