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Analog Devices Inc./Maxim Integrated MAX4173TESA
- Part No.:
- MAX4173TESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4173TESA.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
MAX4173TESA 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 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 MAX4173TESA datasheet, MAX4173TESA pinout, MAX4173TESA application, or MAX4173TESA equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation value, and two confirmed alternative parts with documented functional and selection differences.
Technical Context
The MAX4173TESA implements a high-impedance current-mirror-based sensing architecture that converts differential sense voltage (VRS+ – VRS−) into a proportional voltage output without external gain resistors. Its input common-mode range remains fully functional down to 0V-even during deep battery discharge-due to internal biasing independent of VCC.
It features a 12kΩ output impedance, requires no external compensation for stability at CLOAD ≤ 5pF, and achieves 1% settling in 400ns (typical) for step changes in sense voltage. Power-supply rejection exceeds 60dB across DC to 1MHz, ensuring robust operation in noisy power-rail environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output = 20 × (ILOAD × RSENSE); enables 1V output at 50mV sense voltage for direct ADC interfacing. |
| Full-Scale Sense Voltage | 150mV - maximum differential input before output saturation; defines minimum RSENSE for target load current. |
| Input Offset Voltage | ±3mV (max) - contributes ≤ ±60µV error at 20× gain; limits resolution for sub-100mA current sensing with 10mΩ resistor. |
| Bandwidth | 1.7MHz - supports real-time monitoring inside battery charger control loops with <1µs transient response. |
| Supply Current | 420µA - enables always-on current monitoring in portable systems without compromising battery life. |
| Common-Mode Range | 0V to +28V - allows direct connection to battery anode during deep discharge (<1V), preserving measurement integrity. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive accessory applications without derating. |
Pinout & Package
SOT23-6 package with 1.6mm × 2.9mm footprint, 0.95mm height, and RoHS-compliant lead-free finish. Pin 1 marked by dot; pin 1–6 arranged counterclockwise from top-left corner in top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Current-sense resistor low-side terminal | Connects to load side of external sense resistor; high-impedance input avoids ground path disturbance in high-side configuration. |
| 2 (GND) | Analog ground reference | Return path for internal bias circuitry; must be tied to system analog ground-not power ground-to avoid noise coupling. |
| 3 (RS+) | Current-sense resistor high-side terminal | Connects to battery/anode side; accepts up to +28V common-mode voltage regardless of VCC level. |
| 4 (N.C.) | No internal connection | Not bonded; must remain unconnected-no pull-up/down or routing required. |
| 5 (VCC) | Positive supply input | Accepts +3V to +28V; bypass with 0.1µF ceramic capacitor directly to GND for PSR optimization. |
| 6 (OUT) | Voltage output | High-impedance current-source output (12kΩ); requires high-Z ADC input or buffer op-amp to prevent gain error from loading. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20V/V gain | Eliminates external gain-setting resistors-reducing BOM count, layout area, and resistor matching errors in space-constrained SOT23 designs. |
| 0V to +28V common-mode range | Enables uninterrupted current monitoring during battery voltage collapse below 1V, critical for fuel-gauge accuracy in Li-ion systems. |
| ±0.5% full-scale accuracy | Supports precise charge/discharge accounting in smart battery packs without calibration per unit. |
| 1.7MHz bandwidth | Meets dynamic response requirements for closed-loop battery charger feedback, including switch-mode constant-current regulation. |
| 420µA supply current | Permits continuous current logging in always-on subsystems (e.g., USB-C PD port controllers) with negligible impact on standby battery drain. |
Applications
| Notebook Computer Power Monitoring | Smart Battery Charger Feedback |
|---|---|
Use Scenario: Real-time monitoring of CPU/GPU rail current during turbo boost events to trigger thermal throttling or power capping. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog feedback to system power management IC without disrupting ground return paths. Use Value: Enables accurate power budgeting within ±0.5% error margin, preventing overcurrent shutdown during transient loads up to 20A. | Use Scenario: Closed-loop control of charging current in multi-cell Li-ion battery packs using switching regulator feedback. IC Role / Device Role / Timing Role: High-bandwidth (1.7MHz) analog sensor feeding error signal to charger controller's current loop compensator. Use Value: Maintains ±1% charge current regulation across 0–28V battery voltage range-including 2.5V/cell deep discharge-ensuring cell balancing integrity. |
| Portable Medical Device Battery Management | PA Bias Current Control |
Use Scenario: Continuous current logging in handheld ultrasound or infusion pumps to estimate remaining runtime and trigger low-battery alerts. IC Role / Device Role / Timing Role: Always-on, low-quiescent (420µA) current monitor interfaced to microcontroller ADC for firmware-based fuel gauging. Use Value: Delivers stable 0.5% accuracy over –40°C to +85°C, enabling reliable runtime prediction across clinical operating environments. | Use Scenario: Setting and stabilizing bias current in RF power amplifiers for cellular base stations and small cells. IC Role / Device Role / Timing Role: Precision high-side sensor measuring PA collector/drain current to adjust gate/base drive in real time. Use Value: Compensates for temperature-induced PA drift using 1.7MHz bandwidth to maintain EVM compliance under dynamic modulation. |
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% gain error, 500µA supply current, SO-8 package | Higher supply current and larger SO-8 footprint; lacks 0V common-mode capability (min VCM = +2.7V) | Select when SO-8 layout exists and 0V sensing is not required; avoid for deep-discharge battery monitoring. |
| INA240A1D | 20V/V gain, 400kHz bandwidth, ±0.2% gain error, 2.4mA supply current, SO-8 package | Lower bandwidth limits use in fast charger loops; higher supply current reduces battery life in portable apps | Prefer for ultra-high-accuracy (<±0.2%) industrial current measurement where speed is secondary to precision. |
Compared with MAX4173TESA, MAX4080TASA+ trades 0V common-mode support and SOT23 size for slightly relaxed accuracy and higher quiescent draw, while INA240A1D prioritizes gain accuracy and robustness over bandwidth and power efficiency-making MAX4173TESA optimal for compact, battery-critical high-speed sensing.
Availability
MAX4173TESA is available at Aetrix Electronics and suitable for notebook computer power management, smart battery charger feedback, portable medical device battery monitoring, and RF PA bias control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX4173TESA 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, communications, and consumer applications.
The MAX4173 product line delivers cost-optimized, space-efficient high-side current-sense amplifiers targeting battery-powered systems where ground-path integrity, deep-discharge operation, and minimal external components are essential design constraints.
FAQ
What is the guaranteed input common-mode voltage range for MAX4173TESA?
The MAX4173TESA guarantees operation from 0V to +28V input common-mode voltage, independent of supply voltage. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, where VCMR is specified as 0 to +28V and tested down to 0V-even during battery deep discharge. The device remains functional and accurate across this full range, unlike alternatives requiring minimum VCM > +2V.
Does MAX4173TESA require external gain-setting resistors?
No, MAX4173TESA does not require external gain-setting resistors. It integrates a fixed 20V/V gain stage using internal precision resistor ratios and a current-mirror architecture. This eliminates external components, reduces PCB area, avoids resistor tolerance and thermal drift errors, and simplifies design-confirmed in the General Description and Functional Diagram sections of the datasheet.
What is the maximum supply voltage rating for MAX4173TESA?
The absolute maximum supply voltage for MAX4173TESA is +30V, with recommended operating range from +3V to +28V. This is explicitly stated in the Absolute Maximum Ratings table under "VCC, RS+, RS− to GND" and verified in Electrical Characteristics where VCC is tested up to +28V. Operation beyond +28V risks exceeding safe operating area limits.
Can MAX4173TESA be used with a single 3.3V supply?
Yes, MAX4173TESA operates fully within specification with a +3.3V supply. The Electrical Characteristics table specifies VCC min = +3V, and performance parameters-including gain accuracy, offset, and bandwidth-are guaranteed across the entire +3V to +28V range. At +3.3V, it maintains 1.7MHz bandwidth and ±0.5% full-scale accuracy as verified in production testing.
What is the output impedance of MAX4173TESA and how does it affect system design?
MAX4173TESA has a nominal output impedance of 12kΩ, confirmed in the Electrical Characteristics table under "OUT Output Resistance". This high-impedance current-source output means external loading (e.g., ADC input resistance <1MΩ) introduces measurable gain error-calculated as %Error = 100 × (1 − 12kΩ/(12kΩ + RLOAD)). Designers must interface MAX4173TESA with high-Z inputs or add a unity-gain buffer to preserve accuracy.
MAX4173TESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MAX4173TESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173TESA 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 reliable?
The price and inventory of MAX4173TESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173TESA is usually 5 days.
3.What payment methods are accepted for MAX4173TESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173TESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173TESA?
MAX4173TESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173TESA 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?
For technical support, including MAX4173TESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173TESA requirements.
6.How does Aetrix verify that MAX4173TESA is sourced from the original manufacturer or authorized distributors?
All MAX4173TESA 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 meets industry standards.
7.What is the process for return or replacement of MAX4173TESA?
All MAX4173TESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173TESA, 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 part is unused and in its original packaging.
Return procedure for MAX4173TESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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