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Analog Devices Inc./Maxim Integrated MAX4073TAXK-T
- Part No.:
- MAX4073TAXK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4073TAXK-T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,964
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Product details
Overview
MAX4073TAXK-T from Maxim Integrated is a high-side current-sense amplifier with voltage output, designed for precision battery-charger current monitoring in portable systems. It features 20V/V fixed gain, ±1.0% full-scale accuracy at +25°C, +2V to +28V input common-mode range independent of supply, and operates from +3V to +28V single supply. Its 1.8MHz bandwidth supports use inside battery-charger control loops.
For engineers reviewing the MAX4073TAXK-T datasheet, MAX4073TAXK-T pinout, MAX4073TAXK-T application, or MAX4073TAXK-T equivalent, this device delivers low-cost, compact high-side sensing without external gain-setting resistors - critical for space-constrained, automotive-grade power management in cell phones, smart battery packs, and notebook computers.
Technical Context
The MAX4073TAXK-T uses an internal current-mirror architecture to convert differential sense voltage (VSENSE = VRS+ − VRS−) into a proportional voltage output (VOUT = 20 × VSENSE). Its input stage maintains high-impedance RS+ and RS− terminals, enabling accurate sensing without ground-path interference.
It achieves stable operation across −40°C to +125°C with 0.5mA supply current, 12kΩ output resistance, and no phase reversal under overdrive. The device's PSRR exceeds 70dB and CMR reaches 90dB, ensuring robust performance in noisy, high-common-mode battery-supply environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 2V when VSENSE = 100mV; eliminates need for external gain resistors. |
| Full-Scale Accuracy | ±1.0% at +25°C - enables direct current measurement without calibration in most portable applications. |
| Common-Mode Range | +2V to +28V, supply-independent - allows monitoring of batteries as low as 2V and high-side sensing above VCC. |
| Bandwidth | 1.8MHz - supports dynamic response in fast-switching charger control loops. |
| Supply Voltage | +3V to +28V - compatible with Li-ion, multi-cell, and automotive battery rails without level-shifting. |
| Supply Current | 0.5mA typical - minimizes quiescent power draw in always-on battery-monitoring circuits. |
| Operating Temperature | −40°C to +125°C - qualified for automotive and industrial embedded power management. |
Pinout & Package
MAX4073TAXK-T is housed in a RoHS-compliant 5-pin SC70 package (outline 21-0076), measuring 2.0mm × 1.25mm × 0.9mm - half the footprint of SOT23 - optimized for ultra-compact PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Low-impedance return path for internal circuitry; must be connected directly to system ground plane. |
| VCC (Pin 2) | Positive supply input | Accepts +3V to +28V; requires 0.1µF bypass capacitor to GND for stability and noise rejection. |
| RS+ (Pin 3) | High-side sense input (+) | Connects to battery/charger power rail side of external sense resistor; withstands up to +30V absolute max. |
| RS− (Pin 4) | High-side sense input (−) | Connects to load side of sense resistor; differential input accepts up to ±5V VSENSE with 150mV full-scale. |
| OUT (Pin 5) | Voltage output | Delivers 20×VSENSE; 12kΩ output impedance requires high-Z ADC or op-amp input to avoid gain error. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20V/V gain | Eliminates external gain-setting resistors, reducing BOM count and layout area in cost-sensitive designs. |
| ±1.0% full-scale accuracy | Enables reliable current threshold detection in battery protection ICs without post-production trimming. |
| 1.8MHz bandwidth | Supports real-time current feedback in switching regulator control loops with <800ns settling time. |
| +2V to +28V common-mode range | Permits direct sensing on Li-ion (2.5–4.2V), 12V automotive, and 24V industrial rails without attenuation. |
| Automotive temperature grade | Validated for −40°C to +125°C operation - suitable for under-hood and portable device thermal profiles. |
Applications
| Smart Battery Pack Monitoring | Li-ion Charger Control Loop |
|---|---|
|
Use Scenario: Real-time current tracking during CC/CV charging of multi-cell Li-ion packs in notebooks or power tools. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced analog output to charger controller ADC. Use Value: Enables precise charge termination and safety cutoff without disrupting battery ground integrity or adding shunt resistor parasitics. |
Use Scenario: Closed-loop current regulation in switch-mode battery chargers using synchronous buck topology. IC Role / Device Role / Timing Role: Fast-response current sensor feeding error amplifier in charger IC feedback path. Use Value: 1.8MHz bandwidth ensures loop stability and transient suppression during load-step events in high-efficiency chargers. |
| Cell Phone Power Path Management | PA Bias Current Monitoring |
|
Use Scenario: Input current limiting and USB OTG power negotiation in smartphone PMIC subsystems. IC Role / Device Role / Timing Role: High-side monitor between USB input and system power rail, reporting to baseband processor. Use Value: +2V to +28V common-mode range accommodates both 5V USB and higher-voltage fast-charge adapters without redesign. |
Use Scenario: Dynamic bias current adjustment for RF power amplifiers in 4G/5G handsets based on transmit power level. IC Role / Device Role / Timing Role: Precision current sensor in PA DC bias path, feeding closed-loop bias control circuitry. Use Value: ±1.0% accuracy at +25°C ensures consistent PA efficiency and linearity across operating conditions. |
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 |
|---|---|---|---|
| MAX4173TAUT+T | 6-pin SOT23 package; wider 0V to +28V common-mode range; same 20V/V gain and −40°C to +125°C rating. | Supports sensing down to 0V common-mode (e.g., low-side or ground-referenced configurations); larger footprint. | Select MAX4173TAUT+T only if 0V common-mode capability or SOT23 assembly compatibility is required. |
| INA213AIDCKR | 26V max common-mode; 200kHz bandwidth; ±0.5% gain accuracy; 3.6V to 26V supply; SC70-6 package. | Lower bandwidth limits use in fast charger loops; tighter gain accuracy benefits precision metering over wide temperature. | Choose INA213AIDCKR when ultimate gain tolerance matters more than speed, and supply is ≤26V. |
Compared with MAX4073TAXK-T, MAX4173TAUT+T offers broader common-mode flexibility at the cost of size, while INA213AIDCKR trades bandwidth for superior gain accuracy - making MAX4073TAXK-T optimal for cost-sensitive, high-speed battery-charger feedback where 1.8MHz response and SC70 compactness are decisive.
Availability
MAX4073TAXK-T is available at Aetrix Electronics and suitable for smart battery packs, notebook computer power management, and automotive-grade charger modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4073TAXK-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) is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX4073 family was engineered for high-accuracy, low-cost high-side current sensing in portable and automotive power systems - delivering integrated solutions that replace discrete op-amp + resistor networks.
FAQ
What is the maximum common-mode voltage the MAX4073TAXK-T can handle?
The MAX4073TAXK-T supports a +2V to +28V input common-mode voltage range, independent of supply voltage. This means it can accurately sense current on battery rails as low as 2V or as high as 28V - even exceeding the VCC supply - making it ideal for high-side monitoring in Li-ion, 12V automotive, and 24V industrial systems. Absolute maximum rating is +30V on RS+ and RS− pins.
Does the MAX4073TAXK-T require external gain-setting resistors?
No, the MAX4073TAXK-T does not require external gain-setting resistors. It integrates a fixed 20V/V gain amplifier, eliminating external components and associated layout sensitivity. This simplifies design, reduces board area, and improves reliability compared to discrete current-sense solutions - a key advantage confirmed in its "low-cost, compact" feature set.
What is the full-scale sense voltage and corresponding output for the MAX4073TAXK-T?
The MAX4073TAXK-T has a full-scale sense voltage (VSENSE) of 100mV, yielding a full-scale output voltage (VOUT) of 2.0V (20 × 100mV). This relationship holds across its operating temperature and supply range, with ±1.0% accuracy at +25°C - enabling direct interfacing with standard 2.0V-full-scale ADCs without scaling circuitry.
Can the MAX4073TAXK-T operate from a 3.3V supply?
Yes, the MAX4073TAXK-T operates from a +3V to +28V single supply, so 3.3V is fully supported. At VCC = 3.3V, the output swing remains functional up to VOUT ≈ 2.1V (VCC − 1.2V), which accommodates its 2.0V full-scale output. Supply current remains ~0.5mA, ensuring low-power operation in 3.3V microcontroller-based systems.
Is the MAX4073TAXK-T pin-compatible with other MAX4073 variants like the MAX4073FAXK+T?
Yes, the MAX4073TAXK-T is pin-compatible with all SC70-packaged MAX4073 variants (e.g., MAX4073FAXK+T, MAX4073HAXK+T), sharing identical 5-pin SC70 pinout and footprint. Only the gain differs (20V/V vs. 50V/V vs. 100V/V), allowing drop-in replacement when adjusting full-scale output range - provided the downstream signal chain supports the new output voltage span.
MAX4073TAXK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.8 MHz
- Current - Input Bias:
- 40 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 500µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX4073TAXK-T FAQ
1.How can I place an order for MAX4073TAXK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073TAXK-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 MAX4073TAXK-T reliable?
The price and inventory of MAX4073TAXK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073TAXK-T is usually 5 days.
3.What payment methods are accepted for MAX4073TAXK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073TAXK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073TAXK-T?
MAX4073TAXK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073TAXK-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 MAX4073TAXK-T?
For technical support, including MAX4073TAXK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073TAXK-T requirements.
6.How does Aetrix verify that MAX4073TAXK-T is sourced from the original manufacturer or authorized distributors?
All MAX4073TAXK-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 MAX4073TAXK-T meets industry standards.
7.What is the process for return or replacement of MAX4073TAXK-T?
All MAX4073TAXK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073TAXK-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 MAX4073TAXK-T part is unused and in its original packaging.
Return procedure for MAX4073TAXK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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