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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:2,375
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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, 1.7MHz bandwidth, and 0V to +28V input common-mode range independent of supply voltage. It delivers voltage output without external gain-setting resistors and is optimized for battery-charger control loops and portable system current monitoring.
For engineers reviewing the MAX4173TESA+T datasheet, MAX4173TESA+T pinout, MAX4173TESA+T application, or MAX4173TESA+T equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation value, and two confirmed alternative parts with functional and selection guidance.
Technical Context
The MAX4173TESA+T implements a high-impedance current-mirror-based architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output without requiring external feedback components. Its input stage operates with zero dependence on VCC, enabling accurate sensing down to 0V common-mode - critical for deeply discharged batteries.
It integrates internal resistor ratios defining its 20V/V gain, achieves 420µA quiescent current across −40°C to +85°C, and maintains ±3mV input offset voltage (typ) while delivering 1.7MHz small-signal bandwidth - making it suitable for closed-loop battery charge regulation where fast transient response and ground-path integrity are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets output voltage = 20 × (VRS+ − VRS−); enables direct interface with 10-bit ADCs at 100mV full-scale sense voltage. |
| Full-Scale Accuracy | ±0.5% - ensures ≤5mV error at 1V output; supports precise battery charge termination and overcurrent detection. |
| Common-Mode Range | 0V to +28V - allows monitoring of battery discharge down to 0V without loss of functionality or phase reversal. |
| Bandwidth | 1.7MHz - supports dynamic current tracking in switching charger control loops with <800ns settling time to 1%. |
| Supply Current | 420µA - enables always-on current monitoring in low-power portable systems without significant battery drain. |
| Input Offset Voltage | ±3mV (typ) - contributes ≤60µV error at 20V/V gain; minimized by internal trimming and stable over temperature. |
| Operating Voltage | +3V to +28V - powers directly from main rail or auxiliary supply; eliminates need for dedicated bias voltage. |
Pinout & Package
MAX4173TESA+T is housed in a RoHS-compliant 6-pin SOT23 package (package code U6+2, outline 21-0058), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Current-sense resistor load-side terminal | Connects to low side of external RSENSE; referenced to GND path - preserves system ground integrity in battery-powered designs. |
| 2 (GND) | Analog ground reference | Return path for internal circuitry; must be tied to clean system ground near RSENSE to minimize noise coupling. |
| 3 (RS+) | Current-sense resistor power-side terminal | Connects to high side of RSENSE and battery/anode; accepts up to +28V regardless of VCC level. |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF bypass capacitor to GND for stability and PSR optimization. |
| 5 (N.C.) | No internal connection | Not bonded; must remain unconnected - floating or tied to GND has no effect on operation. |
| 6 (OUT) | Voltage output terminal | Delivers 20×(VRS+ − VRS−) with ~12kΩ output impedance; drives high-Z inputs or requires buffer for low-R loads. |
Key Features
| Feature | Design Value |
|---|---|
| High-side sensing architecture | Eliminates ground-path disturbance in battery chargers and smart battery packs - preserves load return continuity during fault events. |
| Supply-independent common-mode range | Enables accurate current measurement even when battery voltage drops below VCC, e.g., 0.8V battery with 5V supply. |
| Integrated 20V/V gain | Removes external gain resistors and layout sensitivity - reduces BOM count and PCB area in space-constrained notebooks and phones. |
| 1.7MHz bandwidth with 800ns settling | Supports real-time current feedback in 500kHz–1MHz switching charger controllers without loop instability. |
| 420µA quiescent current | Allows continuous current monitoring in always-on battery fuel gauging circuits without compromising standby runtime. |
Applications
| Notebook Battery Charging | Smartphone Power Management |
|---|---|
Use Scenario: Real-time current monitoring inside AC/DC adapter-controlled Li-ion charging circuits with adaptive termination. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing voltage-output feedback to charger IC's current regulation loop. Use Value: Enables ±0.5% full-scale accuracy for charge-current matching across temperature, supporting JEITA-compliant thermal charging profiles. | Use Scenario: System-level load-current tracking during RF transmission bursts and display backlight ramp-up. IC Role / Device Role / Timing Role: High-bandwidth current monitor feeding ADC for dynamic power budgeting and thermal throttling decisions. Use Value: 1.7MHz bandwidth captures fast current transients (<1µs rise), improving battery-life estimation accuracy by >8% vs. slower alternatives. |
| Portable Medical Device Monitoring | Industrial Handheld Metering |
Use Scenario: Precision current measurement in battery-powered ECG or glucose meter front-ends with low-noise analog signal chains. IC Role / Device Role / Timing Role: High-accuracy, low-drift current sensor isolating measurement path from noisy digital subsystems via high-side placement. Use Value: ±3mV input offset and 0V–28V common-mode range allow direct sensing of microamp-to-amp loads without level-shifting or calibration overhead. | Use Scenario: Field-deployable multimeter or clamp-meter accessory using external shunt for wide-range DC current measurement. IC Role / Device Role / Timing Role: Fixed-gain voltage-output amplifier converting mV-level shunt voltage to standardized 0–2V or 0–5V output range. Use Value: Eliminates gain-resistor tolerance errors and thermal drift - improves absolute accuracy to ±0.5% over −40°C to +85°C without recalibration. |
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, 125kHz bandwidth, ±0.75% gain error, 0.8V to 76V common-mode range | Lower bandwidth limits use in fast-switching chargers; wider common-mode supports industrial 48V rails | Select when operating above 28V or where ultra-low quiescent current (75µA) outweighs speed requirements |
| INA210AIDCKR | 20V/V gain, 120kHz bandwidth, ±0.5% gain error, 0V to 26V common-mode, 65µA IQ | Lower max common-mode (26V vs. 28V) and bandwidth restricts use in high-speed 28V battery chargers | Prefer for ultra-low-power applications where 120kHz suffices and supply current <100µA is mandatory |
Compared with MAX4173TESA+T, MAX4080TASA+ trades 1.7MHz bandwidth for extended 76V common-mode and lower IQ, while INA210AIDCKR offers similar accuracy at drastically reduced supply current but cannot support 28V battery monitoring or fast charger loops.
Availability
MAX4173TESA+T is available at Aetrix Electronics and suitable for notebook battery charging, smartphone power management, portable medical device monitoring, and industrial handheld metering requiring stable component supply and guaranteed long-term sourcing.
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, mixed-signal, and power-management ICs for demanding industrial, automotive, and portable applications.
The MAX4173 family targets compact, cost-sensitive high-side current sensing in battery-powered systems - emphasizing supply independence, low quiescent power, and integration to replace discrete op-amp + resistor solutions.
FAQ
What is the maximum common-mode voltage the MAX4173TESA+T can measure?
The MAX4173TESA+T supports an input common-mode voltage range of 0V to +28V, fully independent of its supply voltage (VCC). This means it can accurately sense current even when the battery voltage drops to 0V - a critical capability for deep-discharge monitoring in notebook and smartphone battery systems. The specification is guaranteed across the full −40°C to +85°C operating temperature range.
Does the MAX4173TESA+T require external gain-setting resistors?
No, the MAX4173TESA+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-error contributions from external component tolerances and temperature drift, simplifying layout and reducing BOM count - a key advantage over op-amp-based discrete current-sense solutions.
What is the typical supply current of the MAX4173TESA+T over temperature?
The MAX4173TESA+T draws a typical supply current of 420µA over the full −40°C to +85°C operating temperature range, with a maximum of 1.0mA. This low quiescent current enables continuous current monitoring in battery-powered devices without significantly impacting standby runtime - especially valuable in always-on fuel-gauging and health-monitoring subsystems.
Can the MAX4173TESA+T be used in battery charger control loops?
Yes, the MAX4173TESA+T is explicitly designed for use inside battery charger control loops. Its 1.7MHz bandwidth, 800ns settling time to 1%, and stable operation down to 0V common-mode enable real-time current feedback in high-frequency switching chargers. The voltage-output interface simplifies connection to standard ADCs or comparator inputs in charger ICs or microcontrollers.
What package type and pin count does the MAX4173TESA+T use?
The MAX4173TESA+T uses a 6-pin SOT23 package (RoHS-compliant, tape-and-reel). Pin assignments are: Pin 1 = RS−, Pin 2 = GND, Pin 3 = RS+, Pin 4 = VCC, Pin 5 = N.C., Pin 6 = OUT. The package measures 2.9mm × 1.6mm with 0.95mm lead pitch and is optimized for space-constrained portable electronics such as ultrabooks and smartphones.
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:
- 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:
- 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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