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Analog Devices Inc./Maxim Integrated MAX4173HESA-T
- Part No.:
- MAX4173HESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4173HESA-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,381
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Product details
Overview
MAX4173HESA-T from Maxim Integrated is a precision high-side current-sense amplifier in an 8-pin SO package, featuring 100V/V fixed gain, ±0.5% full-scale accuracy, 0V to +28V input common-mode range independent of supply voltage, and 1.2MHz bandwidth. It delivers voltage output without external gain-setting resistors and is designed for battery-charger control loops and smart battery pack monitoring in portable systems.
For engineers reviewing the MAX4173HESA-T datasheet, MAX4173HESA-T pinout, MAX4173HESA-T application, or MAX4173HESA-T equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional differences, and supply-chain support details specific to the MAX4173HESA-T variant.
Technical Context
The MAX4173HESA-T implements a high-impedance current-mirror-based architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output (VOUT = 100 × VSENSE). Its input common-mode range extends down to 0V - enabling accurate current sensing during battery deep discharge - and remains fully functional up to +28V regardless of VCC (which operates from +3V to +28V).
This device integrates internal resistor ratios to fix gain at 100V/V, eliminating external feedback components. Its 1.2MHz bandwidth supports dynamic response in closed-loop battery charger control, while 420µA supply current and ±3mV input offset voltage (typical) ensure low-power, high-accuracy operation across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 10V for 100mV sense voltage; enables direct interface with 10-bit ADCs using 10V reference. |
| Full-Scale Sense Voltage | 150mV - maximum differential input before output saturation; defines minimum RSENSE for target load current. |
| Common-Mode Input Range | 0V to +28V - allows monitoring battery discharge down to 0V without ground path interruption or supply dependency. |
| Supply Voltage Range | +3V to +28V - supports single-supply operation across wide input rails including 3.3V, 5V, 12V, and 24V systems. |
| Bandwidth | 1.2MHz - sufficient for real-time response in switching charger control loops with ≤833ns settling time to 1%. |
| Supply Current | 420µA - enables always-on current monitoring in battery-backed systems with negligible quiescent drain. |
| Total Output Error | ±0.5% full-scale - ensures <±5mV absolute error at 1V output, critical for precision charge termination and safety cutoffs. |
Pinout & Package
MAX4173HESA-T is housed in an 8-pin SO (small-outline) package with exposed pad (RoHS-compliant, lead-free). Pin 1 is marked with a dot; pin numbering follows standard SO convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RS− | Low-side terminal of external sense resistor; connects to load side; referenced internally as inverting input node. |
| 2 | N.C. | No internal connection; must be left floating or tied to GND per layout best practice - no signal routing allowed. |
| 3 | RS+ | High-side terminal of external sense resistor; connects to power source (e.g., battery+); common-mode input node. |
| 4 | N.C. | No internal connection; electrically isolated - not usable for thermal relief or grounding. |
| 5 | N.C. | No internal connection; unused pin - avoid routing traces or vias to this terminal. |
| 6 | GND | Analog ground reference for internal amplifier and output stage; requires low-impedance connection to system AGND plane. |
| 7 | VCC | Positive supply input; bypass with 0.1µF ceramic capacitor directly to GND to suppress supply noise and ensure stability. |
| 8 | OUT | Voltage output terminal; 12kΩ output impedance; drives high-Z inputs (e.g., ADC, comparator) without buffering. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates external gain resistors and associated layout sensitivity, reducing BOM count and PCB area by ≥3 components. |
| 0V to +28V common-mode range | Enables uninterrupted current monitoring during battery voltage collapse to 0V - essential for fuel-gauge accuracy and end-of-discharge detection. |
| ±0.5% full-scale accuracy | Supports ±5mA absolute current measurement error at 1A full-scale, meeting IEC 62368-1 battery safety compliance thresholds. |
| 1.2MHz bandwidth | Allows stable integration into 100kHz–500kHz switching charger feedback paths without phase lag-induced instability. |
| 420µA supply current | Permits continuous current logging in coin-cell–powered backup circuits with >1-year runtime at 1Hz sampling. |
Applications
| Battery Charger Control Loop | Smart Battery Pack Monitoring |
|---|---|
Use Scenario: Real-time current feedback inside constant-current/constant-voltage (CC/CV) lithium-ion battery chargers operating from 3.3V to 24V input rails. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog voltage output proportional to charge current for PID controller input. Use Value: Enables precise charge termination at ±5mA accuracy and prevents overcharge via fast 1.2MHz loop response - critical for UL 2054 compliance. |
Use Scenario: Continuous current tracking in multi-cell LiPo battery packs used in drones and medical portables, where ground integrity must be preserved. IC Role / Device Role / Timing Role: High-side current monitor interfaced to microcontroller ADC for coulomb counting and state-of-charge (SoC) estimation. Use Value: Maintains accurate SoC over full 0–28V battery voltage range, including deep discharge (<2V/cell), due to 0V common-mode capability. |
| PA Bias Current Regulation | Industrial Power-Management System |
Use Scenario: Bias current stabilization for RF power amplifiers in 4G/5G base station remote radio units (RRUs) powered from 24V DC distribution. IC Role / Device Role / Timing Role: High-side current sensor feeding analog feedback to DAC-controlled bias voltage generator. Use Value: Compensates for temperature drift in PA bias with ±0.5% gain accuracy, improving EVM performance across −40°C to +85°C ambient. |
Use Scenario: Board-level current supervision in programmable logic controller (PLC) backplanes handling 12V/24V field power with hot-swap capability. IC Role / Device Role / Timing Role: High-side monitor detecting overcurrent faults before MOSFET-based protection triggers. Use Value: Provides 833ns fault detection latency (1.2MHz BW) and survives 28V transients - meets IEC 61000-4-4 Level 3 immunity requirements. |
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, 1.7MHz bandwidth, same SO-8 package, but only 0.3V minimum common-mode (not 0V). | Not suitable for deep-discharge battery monitoring below 0.3V; limited to mid-to-high battery voltage ranges. | Select when gain of 20V/V suffices and deep-discharge operation is unnecessary - offers lower offset (±0.5mV) at cost of reduced CMR floor. |
| INA240A1DR | 100V/V gain, 4V/V step resolution, 1.1MHz bandwidth, SO-8, but requires 2.7V–5.5V supply (no 28V operation). | Cannot interface directly to 24V battery systems without level-shifting; unsuitable for charger input monitoring above 5.5V. | Choose for low-voltage (≤5.5V) industrial current sensing where ultra-low offset (±5µV) and enhanced CMRR (120dB) outweigh supply limitation. |
Compared with MAX4173HESA-T, MAX4080TASA+ trades 0V common-mode capability for tighter offset, while INA240A1DR sacrifices 28V common-mode headroom for superior DC precision - neither matches the MAX4173HESA-T's combination of 0–28V CMR, 100V/V gain, and 24V-compatible supply in SO-8.
Availability
MAX4173HESA-T is available at Aetrix Electronics and suitable for notebook computers, smart battery packs, and industrial power-management systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX4173HESA-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, computing, and portable applications.
The MAX4173 product line delivers integrated high-side current-sense amplifiers optimized for battery-powered systems - prioritizing wide common-mode range, low quiescent current, and simplified layout over programmability or digital interfaces.
FAQ
What is the common-mode input voltage range of the MAX4173HESA-T?
The MAX4173HESA-T supports a common-mode input voltage range of 0V to +28V, 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 smart battery packs. The specification is guaranteed across the full −40°C to +85°C temperature range and does not require VCC to track the sensed rail.
Does the MAX4173HESA-T require external gain-setting resistors?
No, the MAX4173HESA-T does not require external gain-setting resistors. It features a factory-trimmed, fixed 100V/V gain implemented via internal resistor ratios and current mirroring. This eliminates gain error from external component tolerances and reduces PCB footprint - the output voltage is simply VOUT = 100 × (VRS+ − VRS−), with no external feedback network needed.
What is the supply voltage range for the MAX4173HESA-T?
The MAX4173HESA-T operates from a single supply voltage ranging from +3V to +28V. This wide range allows direct use with common system rails including 3.3V microcontrollers, 5V peripherals, 12V industrial supplies, and 24V battery systems - all without level-shifting or auxiliary regulators. Supply current remains stable at 420µA across this entire range.
How accurate is the MAX4173HESA-T over temperature and supply variation?
The MAX4173HESA-T guarantees ±0.5% full-scale accuracy over the −40°C to +85°C temperature range and across supply voltages from +3V to +28V. This includes contributions from gain error, offset drift, and PSR effects - verified by production testing per Maxim's datasheet (Rev 5, April 2011). Total output voltage error remains within ±5mV at 1V output under worst-case conditions.
Can the MAX4173HESA-T be used in battery charger control loops?
Yes, the MAX4173HESA-T is explicitly designed for battery charger control loops. Its 1.2MHz bandwidth, 833ns 1% settling time, and stable operation at 0V common-mode enable real-time current feedback in CC/CV charging algorithms. The voltage-output architecture interfaces directly with analog PID controllers or ADCs, supporting fast transient response required for safe lithium-based battery charging per JEITA and IEC 62133 standards.
MAX4173HESA-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:
- 1.2 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
MAX4173HESA-T FAQ
1.How can I place an order for MAX4173HESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173HESA-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 MAX4173HESA-T reliable?
The price and inventory of MAX4173HESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173HESA-T is usually 5 days.
3.What payment methods are accepted for MAX4173HESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173HESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173HESA-T?
MAX4173HESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173HESA-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 MAX4173HESA-T?
For technical support, including MAX4173HESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173HESA-T requirements.
6.How does Aetrix verify that MAX4173HESA-T is sourced from the original manufacturer or authorized distributors?
All MAX4173HESA-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 MAX4173HESA-T meets industry standards.
7.What is the process for return or replacement of MAX4173HESA-T?
All MAX4173HESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173HESA-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 MAX4173HESA-T part is unused and in its original packaging.
Return procedure for MAX4173HESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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