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Analog Devices Inc./Maxim Integrated MAX4080TASA-T
- Part No.:
- MAX4080TASA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4080TASA-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,361
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Product details
Overview
The MAX4080TASA-T from Maxim Integrated is a unidirectional, high-side current-sense amplifier with 20V/V fixed gain, 4.5V to 76V common-mode input range, ±0.1% full-scale gain accuracy at +25°C, and 100µV input offset voltage - designed for precision 48V telecom power monitoring and automotive battery management systems.
For engineers reviewing the MAX4080TASA-T datasheet, MAX4080TASA-T pinout, MAX4080TASA-T application, or MAX4080TASA-T equivalent, this device delivers verified high-voltage current sensing in space-constrained SO-8 layouts with automotive-grade (-40°C to +125°C) operation and minimal 75µA supply current.
Technical Context
The MAX4080TASA-T implements a precision current-mirror-based architecture that amplifies the differential voltage across an external sense resistor (RS+–RS-) without loading the monitored high-side path. Its independent 4.5V–76V supply (VCC) and common-mode (VRS+) ranges enable operation in systems where sensed voltage exceeds VCC - e.g., battery discharge monitoring with low-supply microcontrollers.
Unlike bidirectional variants (e.g., MAX4081T), the MAX4080TASA-T provides a single-ended output proportional only to forward current (VOUT = VSENSE × 20), eliminating need for external reference inputs (REF1A/REF1B) or polarity interpretation logic - simplifying analog-to-digital interface design in unidirectional power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 5.0V for 250mV sense voltage, enabling direct interfacing with 5V ADCs without scaling. |
| Common-Mode Input Range | 4.5V to 76V - supports monitoring of 12V, 24V, 42V, and 48V systems while isolating load ground path. |
| Full-Scale Sense Voltage | ±250mV - defines maximum measurable voltage drop across RSENSE before output saturation. |
| Input Offset Voltage | ±100µV max at +25°C - contributes ≤0.04% error at full-scale 250mV input, critical for low-current accuracy. |
| Supply Current | 75µA typical - enables always-on current monitoring in battery-backed systems with negligible quiescent drain. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial power-conversion environments. |
| Bandwidth | 250kHz - supports real-time response to fast load transients in DC-DC converter feedback or motor drive protection. |
Pinout & Package
MAX4080TASA-T is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch and RoHS-compliant lead finish (+ suffix). The package supports reflow soldering per JEDEC J-STD-020 (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RS+ | High-side sense input | Connects to positive terminal of external current-sense resistor; withstands up to 76V common-mode voltage. |
| 2 VCC | Supply voltage input | Independent 4.5V–76V supply rail; decoupled with ≥0.1µF ceramic capacitor to GND for noise immunity. |
| 3,6,7 N.C. | No internal connection | Unused pins; may be left floating or tied to GND for mechanical stability - no electrical function. |
| 4 GND | Analog ground reference | Return path for internal circuitry and output stage; must be connected to system ground plane with low-impedance trace. |
| 5 OUT | Voltage output | Single-ended 0–5V output proportional to VSENSE × 20; drives 100kΩ loads with <0.3V headroom below VCC. |
| 8 RS- | Low-side sense input | Connects to negative terminal of sense resistor; completes differential measurement path with RS+. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional high-side sensing | Eliminates ground-path disturbance in battery-powered or isolated power rails - preserves system grounding integrity. |
| 20V/V fixed gain | Reduces external component count vs. programmable-gain alternatives; enables predictable full-scale output at 5.0V for 250mV sense voltage. |
| ±0.1% gain accuracy (25°C) | Minimizes calibration burden in production test; supports <0.5% total current-measurement error over temperature without trimming. |
| 76V common-mode range | Enables direct sensing on 48V telecom backplanes or 60V EV auxiliary supplies without level-shifting circuitry. |
| Automotive temperature grade | Validated for continuous operation from -40°C to +125°C - suitable for engine control units and ADAS power modules. |
Applications
| 48V Telecom Power Monitoring | Automotive Battery Management |
|---|---|
|
Use Scenario: Real-time current measurement on 48V DC distribution bus in telecom base station power shelves. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mV-level RSENSE voltage to 0–5V analog output for ADC sampling at 10kHz. Use Value: Enables accurate power budgeting and fault detection (e.g., short-circuit >100A) without interrupting ground return path of sensitive RF subsystems. |
Use Scenario: Monitoring charge/discharge current in 12V starter battery during engine start-stop cycles. IC Role / Device Role / Timing Role: Unidirectional current sensor feeding battery ECU with precise load-current data for state-of-charge estimation. Use Value: Delivers ±0.5% current accuracy over -40°C to +125°C, supporting reliable cold-cranking diagnostics and alternator regulation. |
| Industrial DC-DC Converter Protection | Server Board-Level Power Monitoring |
|
Use Scenario: Overcurrent detection in isolated 24V→5V flyback converter supplying FPGA core voltage. IC Role / Device Role / Timing Role: High-side monitor placed on primary-side high-voltage rail to detect transformer saturation or secondary short. Use Value: 250kHz bandwidth ensures sub-µs response to fault events; 75µA quiescent current avoids efficiency penalty in standby mode. |
Use Scenario: Per-rail current telemetry on AI accelerator card with multiple 3.3V, 12V, and 54V power domains. IC Role / Device Role / Timing Role: Compact SO-8 current sensor mounted adjacent to VRM output, feeding telemetry to BMC via analog multiplexer. Use Value: 8-pin SO footprint minimizes PCB area vs. discrete op-amp solutions; 4.5V–76V range covers all server rail voltages in single BOM item. |
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 |
|---|---|---|---|
| INA240A1QDRQ1 | 20V/V gain, AEC-Q100 Grade 1, 80V common-mode, but higher 120µV offset and 1.1mA supply current. | Better automotive qualification (Q100), but less suitable for ultra-low-power always-on monitoring due to 15× higher ICC. | Select when AEC-Q100 compliance is mandatory and higher offset is acceptable; avoid if <100µA supply budget is required. |
| MAX4080TASA+ | Identical gain, package, and specs - differs only in RoHS compliance marking (+ suffix); electrically identical to MAX4080TASA-T. | No functional difference; + version is lead-free/RoHS-compliant; -T version is legacy marking with same performance. | Choose MAX4080TASA+ for new designs requiring RoHS conformance; MAX4080TASA-T remains valid for legacy procurement. |
Compared with INA240A1QDRQ1, MAX4080TASA-T offers 15× lower supply current and tighter offset for battery-sensitive applications; compared with MAX4080TASA+, it shares identical electrical behavior but lacks explicit RoHS labeling - making it suitable for non-regulated industrial use cases where compliance documentation is not mandated.
Availability
MAX4080TASA-T is available at Aetrix Electronics and suitable for 48V telecom power monitoring, automotive battery management, and industrial DC-DC converter protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4080TASA-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 precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX4080 family was engineered for high-voltage, high-accuracy current sensing in safety-critical power systems - emphasizing low offset, wide common-mode range, and automotive-grade reliability without external references.
FAQ
What is the maximum common-mode voltage the MAX4080TASA-T can handle?
The MAX4080TASA-T supports a common-mode input voltage range of 4.5V to 76V on both RS+ and RS- terminals independently of VCC. This allows it to monitor current in 48V telecom systems or automotive 24V/42V rails without level-shifting circuitry. Absolute maximum ratings permit transient exposure up to 80V, but continuous operation must remain within the 76V limit specified in the DC Electrical Characteristics table.
Does the MAX4080TASA-T require an external reference voltage?
No, the MAX4080TASA-T does not require an external reference voltage. As a unidirectional current-sense amplifier, its output (OUT) is referenced to GND and scales linearly with VSENSE × 20. Reference inputs (REF1A/REF1B) are exclusive to the bidirectional MAX4081 series; the MAX4080TASA-T uses only RS+, RS-, VCC, GND, and OUT pins - simplifying layout and reducing BOM count.
What is the full-scale sense voltage for the MAX4080TASA-T?
The full-scale sense voltage (VSENSE) for the MAX4080TASA-T is ±250mV - meaning the device outputs 5.0V (20 × 0.25V) at maximum forward current. This value is fixed by the 20V/V gain architecture and defines the optimal RSENSE selection: e.g., a 100mΩ resistor yields full-scale output at 2.5A load current. Exceeding ±250mV risks output saturation and measurement nonlinearity.
Can the MAX4080TASA-T be used in bidirectional current sensing applications?
No, the MAX4080TASA-T is strictly unidirectional and cannot measure reverse (discharge) current. It produces a positive-only output proportional to (RS+ – RS-) × 20. For bidirectional sensing - such as battery charge/discharge monitoring - the MAX4081TASA-T (same gain and package) must be used instead, as it incorporates REF1A/REF1B inputs to establish a mid-supply zero-current reference.
What package type and footprint does the MAX4080TASA-T use?
The MAX4080TASA-T uses an 8-pin SO (Small Outline) package with 1.27mm lead pitch and standard JEDEC MS-012AC outline. Its land pattern matches industry-standard SOIC-8 footprints, enabling drop-in compatibility with existing PCB designs using similar devices like the MAX4080FASA or MAX4080SASA - no layout revision needed when switching between gain variants in the same package.
MAX4080TASA-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:
- 250 kHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 75µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 76 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4080TASA-T FAQ
1.How can I place an order for MAX4080TASA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4080TASA-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 MAX4080TASA-T reliable?
The price and inventory of MAX4080TASA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4080TASA-T is usually 5 days.
3.What payment methods are accepted for MAX4080TASA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4080TASA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4080TASA-T?
MAX4080TASA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4080TASA-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 MAX4080TASA-T?
For technical support, including MAX4080TASA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4080TASA-T requirements.
6.How does Aetrix verify that MAX4080TASA-T is sourced from the original manufacturer or authorized distributors?
All MAX4080TASA-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 MAX4080TASA-T meets industry standards.
7.What is the process for return or replacement of MAX4080TASA-T?
All MAX4080TASA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4080TASA-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 MAX4080TASA-T part is unused and in its original packaging.
Return procedure for MAX4080TASA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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