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Analog Devices Inc./Maxim Integrated MAX4073TAXK+TG65
- Part No.:
- MAX4073TAXK+TG65
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4073TAXK+TG65.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:280,000
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Product details
Overview
The MAX4073TAXK+TG65 from Maxim Integrated is a high-side current-sense amplifier with voltage output, designed for precision battery-charger current monitoring in automotive and 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+TG65 datasheet, MAX4073TAXK+TG65 pinout, MAX4073TAXK+TG65 application, or MAX4073TAXK+TG65 equivalent, key selection criteria include high-side sensing capability without ground-path interference, SC70 package footprint constraints, automotive temperature compliance (-40°C to +125°C), and compatibility with external sense resistors for scalable full-scale current ranges.
Technical Context
The MAX4073TAXK+TG65 implements a bipolar-based current-mirror architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output without requiring external gain-setting resistors. Its input stage maintains high impedance at RS−, enabling accurate high-side sensing even when VRS+ exceeds VCC.
It delivers stable performance across its full operating range: supply voltage (+3V to +28V), common-mode input (+2V to +28V), and temperature (−40°C to +125°C). Output settling time is 400ns to 1% for 100mV step input, and saturation recovery time is 5µs - critical for fast transient response in charger feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 2V for 100mV sense voltage, enabling direct interface with 2.5V/3.3V ADC references. |
| Full-Scale Accuracy | ±1.0% at +25°C - ensures ≤20mV absolute error on 2V output, supporting <1% current measurement fidelity in production systems. |
| Common-Mode Range | +2V to +28V, supply-independent - allows monitoring of Li-ion battery discharge down to 2V while powered from 3.3V rail, eliminating ground-loop disruption. |
| Bandwidth | 1.8MHz - supports closed-loop stability in switching charger controllers with >100kHz switching frequencies and fast load-step response. |
| Supply Current | 0.5mA typical at VCC = 28V - enables always-on current monitoring in low-power battery systems without significant quiescent drain. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive power management and industrial battery-pack monitoring applications. |
| Output Impedance | 12kΩ - requires high-impedance ADC input or op-amp buffer to avoid gain error; loading with <120kΩ introduces >1% error. |
Pinout & Package
The MAX4073TAXK+TG65 is housed in a RoHS-compliant 5-pin SC70 package (outline 21-0076), measuring 2.0mm × 1.25mm × 0.95mm - half the footprint of SOT23 - optimized for space-constrained portable and automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 2) | Ground reference | Low-impedance return path for internal bias and output stage; must connect to clean system ground near sense resistor. |
| VCC (Pin 3) | Positive supply input | Accepts +3V to +28V; requires local 0.1µF ceramic bypass capacitor to GND for high-frequency stability. |
| RS+ (Pin 4) | High-side sense input | Connects to battery/anode side of external sense resistor; withstands up to +30V absolute max, independent of VCC. |
| RS− (Pin 5) | Load-side sense input | Connects to load/cathode side of sense resistor; high-impedance input draws <120µA, minimizing measurement perturbation. |
| OUT (Pin 1) | Voltage output | Delivers VOUT = 20 × (VRS+ − VRS−); 12kΩ output impedance mandates high-Z load or active buffering. |
Key Features
| Feature | Design Value |
|---|---|
| No external gain resistors required | Fixed 20V/V internal gain eliminates layout sensitivity, BOM cost, and resistor matching errors in production. |
| +2V to +28V common-mode range | Enables direct monitoring of battery voltage down to 2V while operating from 3.3V supply - no level-shifting circuitry needed. |
| 1.8MHz bandwidth | Supports real-time current feedback in high-frequency switch-mode chargers (e.g., 500kHz–1MHz DC-DC) without phase lag degradation. |
| Automotive temperature rating | Guaranteed operation from −40°C to +125°C junction temperature - suitable for engine bay, battery module, and infotainment power rails. |
| 5-pin SC70 package | 2.0mm × 1.25mm footprint reduces board area by 50% vs. SOT23, easing placement adjacent to high-current traces and thermal pads. |
Applications
| Battery Charger Feedback Loop | Smart Battery Pack Monitoring |
|---|---|
Use Scenario: Real-time current sensing inside constant-current/constant-voltage (CC/CV) lithium-ion battery charging circuits using buck or flyback topologies. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog feedback signal to charger controller PWM comparator or digital state machine. Use Value: Enables precise CC-phase termination and CV-phase current tapering with ±1% full-scale accuracy, improving charge cycle consistency and cell longevity. | Use Scenario: Continuous current monitoring in multi-cell smart battery packs for fuel gauging, safety cutoff, and thermal derating algorithms. IC Role / Device Role / Timing Role: Voltage-output current sensor interfacing directly to microcontroller ADC or dedicated fuel-gauge IC via isolated or buffered analog path. Use Value: Delivers stable 1.8MHz bandwidth response to fast load transients (e.g., motor startup), ensuring accurate coulomb counting and overcurrent detection within 5µs recovery time. |
| Automotive Body Control Module (BCM) | Portable System Power Management |
Use Scenario: Load-current supervision for LED headlamp drivers, window lift motors, or HVAC blower fans in 12V/24V automotive electrical systems. IC Role / Device Role / Timing Role: High-side current monitor feeding diagnostic logic and PWM-controlled load drivers in ASIL-B compatible subsystems. Use Value: Operates reliably across −40°C to +125°C ambient with no ground-path disturbance, enabling short-circuit detection and predictive maintenance without modifying existing chassis grounding. | Use Scenario: System-level current monitoring in notebook computers, tablets, and PDAs to manage USB-C PD negotiation, adapter selection, and thermal throttling. IC Role / Device Role / Timing Role: Compact current-sense front-end delivering voltage output to system power manager IC or embedded controller ADC input. Use Value: SC70 package allows placement directly at battery connector or DC-in jack, minimizing trace inductance and enabling <100ns transient response for dynamic power budgeting. |
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 |
|---|---|---|---|
| MAX4073TAUT+T | Same 20V/V gain and specs, but in 6-pin SOT23 package with wider 0V to +28V common-mode range. | Suitable where ground-referenced sensing or PCB assembly compatibility with legacy SOT23 footprints is required. | Select when board layout uses SOT23 land pattern or system requires sensing down to 0V common-mode (e.g., post-regulator monitoring). |
| INA213AIDCKR | 20V/V gain, 1.5MHz bandwidth, ±0.5% max gain error, but only −0.3V to +26V common-mode range and 2.7V–26V supply. | Lower accuracy drift over temperature; not rated for full automotive −40°C to +125°C range. | Consider for cost-sensitive consumer applications where extended temperature range is not mandatory and 26V max common-mode suffices. |
Compared with MAX4073TAUT+T, the MAX4073TAXK+TG65 saves 50% board area and matches all electrical specs except common-mode lower limit; compared with INA213AIDCKR, it offers superior automotive qualification, higher bandwidth, and guaranteed ±1.0% accuracy over full temperature range - critical for safety-critical current feedback.
Availability
MAX4073TAXK+TG65 is available at Aetrix Electronics and suitable for battery charger feedback loops, smart battery pack monitoring, automotive body control modules, portable system power management, and precision current source design requiring stable component supply across automotive and industrial temperature grades.
Supply support for MAX4073TAXK+TG65 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 connectivity in demanding environments.
The MAX4073 family targets high-side current sensing in space- and power-constrained systems - especially battery-powered and automotive applications where ground integrity, wide common-mode range, and small footprint are essential.
FAQ
What is the maximum common-mode voltage the MAX4073TAXK+TG65 can measure?
The MAX4073TAXK+TG65 supports a +2V to +28V input common-mode range, independent of supply voltage. This means it can accurately sense current when the RS+ pin is at +2V (e.g., deeply discharged Li-ion battery) up to +28V (e.g., 24V automotive system), even if VCC is only +3.3V. Absolute maximum rating is +30V, but operation beyond +28V is not specified.
Does the MAX4073TAXK+TG65 require external resistors to set gain?
No, the MAX4073TAXK+TG65 does not require external gain-setting resistors. It integrates a fixed 20V/V gain amplifier using an internal current-mirror architecture. Gain is factory-trimmed and specified as ±1.0% full-scale accuracy at +25°C - eliminating resistor tolerance, layout parasitics, and thermal drift concerns associated with discrete gain networks.
Can the MAX4073TAXK+TG65 be used in automotive under-hood applications?
Yes, the MAX4073TAXK+TG65 is fully specified for the automotive temperature range of −40°C to +125°C and is qualified for use in under-hood applications such as battery management, LED driver supervision, and motor current monitoring. Its bipolar process, robust ESD protection, and guaranteed performance across this range make it suitable for AEC-Q100 stress-tested designs.
What is the recommended bypass capacitor for the VCC pin of the MAX4073TAXK+TG65?
A 0.1µF ceramic capacitor placed as close as possible between the VCC (Pin 3) and GND (Pin 2) pins is required for stable operation of the MAX4073TAXK+TG65. This capacitor suppresses high-frequency noise and prevents oscillation, especially critical given the device's 1.8MHz bandwidth and operation in noisy switching environments like battery chargers.
How does the output impedance of the MAX4073TAXK+TG65 affect system design?
The MAX4073TAXK+TG65 has a nominal output impedance of 12kΩ. Loading the OUT pin (Pin 1) with resistance below ~120kΩ introduces measurable gain error - e.g., a 100kΩ load causes ~11% error. Therefore, the output must drive a high-impedance input (e.g., SAR ADC with >1MΩ input impedance) or be buffered with a unity-gain op amp having rail-to-rail input/output and supply ≥ VCC.
MAX4073TAXK+TG65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- 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+TG65 FAQ
1.How can I place an order for MAX4073TAXK+TG65 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4073TAXK+TG65 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+TG65 reliable?
The price and inventory of MAX4073TAXK+TG65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4073TAXK+TG65 is usually 5 days.
3.What payment methods are accepted for MAX4073TAXK+TG65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4073TAXK+TG65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4073TAXK+TG65?
MAX4073TAXK+TG65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4073TAXK+TG65 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+TG65?
For technical support, including MAX4073TAXK+TG65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4073TAXK+TG65 requirements.
6.How does Aetrix verify that MAX4073TAXK+TG65 is sourced from the original manufacturer or authorized distributors?
All MAX4073TAXK+TG65 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+TG65 meets industry standards.
7.What is the process for return or replacement of MAX4073TAXK+TG65?
All MAX4073TAXK+TG65 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4073TAXK+TG65, 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+TG65 part is unused and in its original packaging.
Return procedure for MAX4073TAXK+TG65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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