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Analog Devices Inc./Maxim Integrated MAX4372TESA
- Part No.:
- MAX4372TESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4372TESA.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,903
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Product details
Overview
MAX4372TESA from Maxim Integrated is a precision high-side current-sense amplifier in an 8-pin SO package, delivering 20V/V fixed gain, 0.3mV input offset voltage, 0.18% full-scale accuracy, and 30μA supply current. It operates from 2.7V to 28V and supports 0–28V input common-mode range independent of supply voltage-enabling accurate battery discharge monitoring in notebook computers and smart-battery chargers.
For engineers reviewing the MAX4372TESA datasheet, MAX4372TESA pinout, MAX4372TESA application, or MAX4372TESA equivalent, key selection criteria include its micropower operation, voltage-output architecture eliminating external gain resistors, high common-mode rejection (85dB), and compatibility with low-impedance sense resistors in space-constrained portable systems.
Technical Context
The MAX4372TESA implements a high-impedance current-mirror-based sensing architecture that converts differential sense voltage (VRS+ – VRS−) into a proportional voltage output without requiring external feedback components. Its input stage maintains functional operation down to 0V common-mode voltage, critical for deep-discharge battery monitoring.
It features rail-to-rail output capability with 1.5Ω output impedance and delivers stable performance across temperature (–40°C to +85°C) and supply variation (2.7V–28V), while maintaining ±0.25% gain accuracy at +25°C and ±5.5% over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - Fixed internal gain enables direct voltage output scaling without external resistors. |
| Input Offset Voltage | ±0.8mV max at +25°C - Enables accurate low-current sensing down to ~5mA with 100mΩ sense resistor. |
| Full-Scale Accuracy | ±0.18% - Guarantees precise current measurement at 100mV sense voltage under nominal conditions. |
| Supply Current | 30μA typical - Supports always-on battery monitoring without significant drain on primary power source. |
| Common-Mode Range | 0V to 28V, supply-independent - Allows monitoring of 2-cell Li-ion packs even at sub-2V per cell. |
| Output Impedance | 1.5Ω - Drives 1MΩ ADC inputs directly; minimal loading error in typical signal chains. |
| Bandwidth | 275kHz at 20V/V gain - Sufficient for DC–10kHz current transients in power management and charger control loops. |
Pinout & Package
The MAX4372TESA is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch, RoHS-compliant, and rated for –40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RS− | Load-side terminal of external sense resistor; referenced to GND for differential input. |
| 2 | N.C. | No internal connection; must be left floating or tied to GND per layout best practice. |
| 3 | OUT | Voltage output proportional to sensed current; drives ADC or comparator with 1.5Ω source impedance. |
| 4 | N.C. | No internal connection; must be left floating or tied to GND per layout best practice. |
| 5 | GND | Analog ground reference for internal circuitry and output stage; requires low-impedance PCB return path. |
| 6 | N.C. | No internal connection; must be left floating or tied to GND per layout best practice. |
| 7 | RS+ | Power-side terminal of external sense resistor; accepts up to 28V common-mode voltage. |
| 8 | VCC | Positive supply input (2.7V–28V); requires ≥0.1μF ceramic decoupling capacitor close to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-output architecture | Eliminates need for external gain-setting resistors, reducing BOM count and layout area in compact battery monitors. |
| Micropower operation | 30μA quiescent current enables continuous current logging in always-on subsystems without compromising battery life. |
| Supply-independent common-mode range | 0–28V input range functions reliably even when VCC is as low as 2.7V-critical for multi-rail battery systems. |
| High CMR and low offset | 85dB common-mode rejection plus ±0.8mV offset ensures <1% error in noisy automotive or industrial power rails. |
| Robust output drive | 1.5Ω output impedance supports direct interface to 12-bit SAR ADCs without buffering, simplifying signal chain design. |
Applications
| Notebook Battery Monitoring | Smart-Battery Charger Control |
|---|---|
Use Scenario: Real-time discharge current tracking during active CPU/GPU load in ultrabooks with dual-cell Li-ion packs. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog voltage output proportional to load current. Use Value: Enables accurate state-of-charge estimation and thermal throttling decisions using only 30μA of system power. | Use Scenario: Precision current regulation loop in USB-C PD fast chargers managing 3A–5A charging profiles. IC Role / Device Role / Timing Role: Primary current feedback element in closed-loop charger IC or microcontroller-based charge controller. Use Value: Delivers ±0.18% full-scale accuracy across 0–28V battery voltage range, ensuring compliance with JEITA thermal charge limits. |
| Portable Medical Device Power Management | Industrial IoT Sensor Node Current Profiling |
Use Scenario: Low-power ECG monitor requiring continuous battery current logging over 72-hour clinical sessions. IC Role / Device Role / Timing Role: Micropower high-side sensor feeding ultra-low-power MCU ADC for energy accounting. Use Value: 30μA supply current and 0.3mV offset allow detection of sub-10mA standby currents with <2% error. | Use Scenario: Field-deployed environmental sensor node powered by Li-SOCl₂ primary battery with 10-year lifespan requirement. IC Role / Device Role / Timing Role: Long-term current profiler capturing wake/sleep cycle statistics to validate power model assumptions. Use Value: 0–28V common-mode range accommodates wide battery voltage swing (3.6V–3.0V), and ±5.5% gain drift over temperature ensures decade-long calibration stability. |
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+ | Higher bandwidth (2.5MHz), higher supply current (75μA), same 20V/V gain, SO-8 package. | Better suited for switching power supply current-loop feedback where >100kHz response is required. | Select MAX4080TASA+ only if bandwidth >200kHz is mandatory; otherwise MAX4372TESA offers superior power efficiency. |
| INA219AIDR | I²C digital output, integrated 12-bit ADC, 0.1% gain error, but limited 26V max common-mode and 2.7–5.5V supply range. | Requires host MCU I²C interface and firmware support; not suitable for analog-only or high-voltage (>5.5V) supply systems. | Choose INA219AIDR for digital BMS implementations with existing I²C infrastructure; MAX4372TESA remains optimal for analog signal chains or wide-supply designs. |
Compared with MAX4080TASA+, MAX4372TESA trades bandwidth for 60% lower quiescent current and identical gain accuracy at DC–275kHz. Against INA219AIDR, it provides analog output, wider supply (2.7–28V) and common-mode (0–28V) ranges, and eliminates MCU dependency-but requires external ADC.
Availability
MAX4372TESA is available at Aetrix Electronics and suitable for notebook battery monitoring, smart-charger feedback control, and portable medical device power management requiring stable component supply and long-lifecycle availability.
Supply support for MAX4372TESA 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 high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and portable applications.
The MAX4372 family was designed specifically for micropower, high-accuracy, high-side current sensing in battery-powered systems-emphasizing supply independence, low offset, and minimal external components.
FAQ
What is the maximum common-mode voltage supported by the MAX4372TESA?
The MAX4372TESA supports a 0V to 28V input common-mode voltage range that is fully independent of its supply voltage (2.7V to 28V). This allows the MAX4372TESA to accurately monitor current in deeply discharged 2-cell Li-ion batteries (down to ~0.5V total) while operating from a separate 3.3V or 5V rail-making it ideal for fault-tolerant battery management architectures.
Does the MAX4372TESA require external gain-setting resistors?
No, the MAX4372TESA does not require external gain-setting resistors. It integrates a precision 20V/V gain stage internally, delivering a voltage output directly proportional to the sense resistor voltage drop. This eliminates resistor matching errors, reduces PCB area, and improves long-term stability-key advantages confirmed in the MAX4372TESA datasheet's Functional Diagram and Applications Information sections.
What is the supply current consumption of the MAX4372TESA at room temperature?
The MAX4372TESA consumes 30μA typical supply current at +25°C with VRS+ > 2V and VSENSE = 5mV, as specified in the Electrical Characteristics table. This ultra-low quiescent current is maintained across its full 2.7V–28V supply range and enables continuous current monitoring in battery-critical applications without measurable impact on runtime-verified in the "Supply Current vs. Supply Voltage" and "Supply Current vs. Temperature" plots.
Can the MAX4372TESA be used with a 12-bit ADC without signal conditioning?
Yes, the MAX4372TESA can interface directly with a 12-bit ADC. Its 1.5Ω output impedance ensures negligible loading error into typical 1MΩ ADC inputs, and its 0.3mV input offset translates to <0.12 LSB error at 12-bit resolution with a 1V full-scale output. The MAX4372TESA datasheet confirms this capability in the "OUT Output Resistance" specification and Typical Operating Characteristics showing clean transient response into capacitive loads.
Is the MAX4372TESA pin-compatible with other variants in the MAX4372 family?
Yes, the MAX4372TESA (SO-8) shares identical pinout and footprint with MAX4372FESA+ and MAX4372HESA+, differing only in internal gain (20V/V, 50V/V, 100V/V). All three variants use the same 8-pin SO package with identical RS+, RS−, OUT, VCC, and GND assignments-allowing hardware reuse across current-range variants via simple part number change and sense resistor adjustment, as documented in the Pin Configurations and Ordering Information tables.
MAX4372TESA 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:
- 275 kHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 30µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4372TESA FAQ
1.How can I place an order for MAX4372TESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372TESA 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 MAX4372TESA reliable?
The price and inventory of MAX4372TESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372TESA is usually 5 days.
3.What payment methods are accepted for MAX4372TESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372TESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372TESA?
MAX4372TESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372TESA 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 MAX4372TESA?
For technical support, including MAX4372TESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372TESA requirements.
6.How does Aetrix verify that MAX4372TESA is sourced from the original manufacturer or authorized distributors?
All MAX4372TESA 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 MAX4372TESA meets industry standards.
7.What is the process for return or replacement of MAX4372TESA?
All MAX4372TESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372TESA, 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 MAX4372TESA part is unused and in its original packaging.
Return procedure for MAX4372TESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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