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Analog Devices Inc./Maxim Integrated MAX4080TASA
- Part No.:
- MAX4080TASA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4080TASA.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,242
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Product details
Overview
MAX4080TASA from Maxim Integrated is a unidirectional, high-side current-sense amplifier with 20V/V fixed gain, 4.5V to 76V independent common-mode input range (VRS+), and 75µA supply current. It delivers ±0.1% full-scale accuracy and ±0.1mV input offset voltage at +25°C, enabling precise telecom power rail monitoring and automotive battery current sensing in 12V/24V systems.
For engineers reviewing the MAX4080TASA datasheet, MAX4080TASA pinout, MAX4080TASA application, or MAX4080TASA equivalent, key selection criteria include its SO-8 package compatibility, 20V/V gain optimized for ±250mV full-scale sense voltage, -40°C to +125°C automotive temperature rating, and absence of external reference requirement-distinguishing it from bidirectional MAX4081 variants.
Technical Context
The MAX4080TASA employs a proprietary current-mirror-based architecture that isolates the high-voltage sense path (up to 76V) from the 4.5V–76V supply rail (VCC). Its input stage maintains constant voltage at internal amplifier terminals during sensing, eliminating ground-path interference and supporting true high-side placement between source and load.
Unlike the MAX4081, the MAX4080TASA omits REF1A/REF1B pins and delivers a single-ended output proportional to VSENSE = (VRS+ – VRS-) without polarity inversion logic or external reference dependency-simplifying design for unidirectional applications such as power-supply overcurrent protection and motor drive current feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 5.0V for 250mV sense voltage, matching standard ADC input ranges |
| Common-Mode Input Range | 4.5V to 76V - enables direct monitoring of 48V telecom backplanes and 24V automotive batteries without level-shifting |
| Supply Current | 75µA - supports always-on battery monitoring with minimal quiescent drain in portable systems |
| Input Offset Voltage | ±0.1mV (typ, +25°C) - ensures ≤0.4% error at 250mV full-scale sense voltage, critical for precision power management |
| Full-Scale Sense Voltage | ±250mV - defines optimal RSENSE selection (e.g., 100mΩ for 2.5A full-scale) to maximize SNR and minimize I²R loss |
| Bandwidth | 250kHz - supports fast transient detection in switching power supplies and motor control loops |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
Pinout & Package
MAX4080TASA is housed in an 8-pin SO (Small Outline) package with exposed pad for thermal enhancement. Pin 1 is RS+, pin 2 is VCC, pins 3/6/7 are no-connect (NC), pin 4 is GND, pin 5 is OUT, and pin 8 is RS-. No internal connection exists on NC pins; they may be left floating or tied to GND for mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS+) | High-side sense input positive | Connects directly to power source terminal; withstands up to 76V common-mode voltage |
| 2 (VCC) | Supply voltage input | Independent 4.5V–76V rail; decoupled with ≥0.1µF ceramic capacitor to suppress transients |
| 3, 6, 7 (N.C.) | No internal connection | May be left unconnected or grounded for PCB mechanical reinforcement; no electrical function |
| 4 (GND) | Analog ground reference | Return path for output stage; must be routed separately from high-current power grounds |
| 5 (OUT) | Voltage output | Single-ended, rail-to-rail capable output proportional to VSENSE; drives 100kΩ loads directly |
| 8 (RS-) | High-side sense input negative | Connects to load side of sense resistor; completes differential sense path with RS+ |
Key Features
| Feature | Design Value |
|---|---|
| 76V independent common-mode range | Enables monitoring of 48V telecom rails and 24V automotive systems without isolation components or level shifters |
| ±0.1% full-scale gain accuracy | Reduces calibration burden in production test; maintains <0.6% error across -40°C to +125°C operating range |
| 20V/V fixed gain (T-suffix) | Optimizes signal chain for 250mV full-scale sense voltage-ideal for 100mΩ/2.5A or 50mΩ/5A configurations |
| 75µA ultra-low supply current | Extends battery life in always-on monitoring applications; draws <1.5mW at 24V supply |
| SO-8 package with automotive qualification | Supports automated assembly and meets AEC-Q100 stress requirements for under-hood deployment |
Applications
| Automotive Battery Monitoring | 48V Telecom Power System |
|---|---|
Use Scenario: Real-time current measurement in 12V/24V vehicle battery management systems for state-of-charge estimation and overcurrent shutdown. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced analog output proportional to load current. Use Value: Eliminates ground-loop errors in chassis-grounded systems; ±0.1% gain accuracy ensures reliable SOC calculation over temperature. |
Use Scenario: Continuous current monitoring on 48V DC distribution rails in telecom base stations and data center PSUs. IC Role / Device Role / Timing Role: Unidirectional high-side sensor interfacing with system microcontroller ADC inputs via 5V-output scaling. Use Value: 76V common-mode range allows direct connection to 48V bus without attenuation networks; 250kHz bandwidth captures switching ripple. |
| Industrial Motor Drive Feedback | Power Supply Overcurrent Protection |
Use Scenario: Phase current sensing in BLDC motor controllers where high-side placement avoids shunt resistor heating effects on low-side MOSFETs. IC Role / Device Role / Timing Role: Precision current amplifier feeding closed-loop speed/torque control circuitry with minimal latency. Use Value: 20µs settling time ensures accurate current capture within PWM cycles; 250kHz bandwidth supports >10kHz switching frequencies. |
Use Scenario: Fast-response overcurrent detection in programmable lab power supplies and server VRMs to trigger fault shutdown before component damage. IC Role / Device Role / Timing Role: High-speed analog front-end converting shunt voltage to clean, amplified output for comparator or ADC thresholding. Use Value: 50µs power-up time enables immediate protection after enable assertion; saturation recovery in 50µs prevents false trips during transient surges. |
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+ | Identical specification; + suffix denotes lead(Pb)-free/RoHS-compliant SO-8 package | No functional difference; same pinout, performance, and temperature rating | Select MAX4080TASA+ for RoHS-compliant manufacturing; identical electrical behavior to MAX4080TASA |
| INA240A1QDRQ1 | 20V/V gain, -40°C to +125°C, but 80V common-mode range and 120dB CMRR vs. 124dB for MAX4080TASA | Automotive AEC-Q100 Grade 1 qualified; includes enhanced ESD protection (±4kV HBM) | Choose INA240A1QDRQ1 when AEC-Q100 Grade 1 certification is mandatory; MAX4080TASA offers superior CMRR for noise-sensitive 48V telecom use |
Compared with MAX4080TASA+, the MAX4080TASA differs only in RoHS compliance status-not performance-while the INA240A1QDRQ1 trades marginal common-mode headroom and higher ESD robustness for slightly lower CMRR, making MAX4080TASA preferable in high-noise 48V backplane monitoring where rejection of coupled transients is critical.
Availability
MAX4080TASA is available at Aetrix Electronics and suitable for automotive battery monitoring, 48V telecom power systems, and industrial motor drive feedback requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4080TASA 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 demanding industrial, automotive, and communications applications, emphasizing high reliability and parametric accuracy.
The MAX4080 family targets high-voltage current sensing in safety-critical and energy-efficient systems, delivering integrated solutions that replace discrete op-amp/shunt combinations with guaranteed gain accuracy, wide common-mode range, and automotive-grade thermal performance.
FAQ
What is the maximum common-mode voltage the MAX4080TASA can handle?
The MAX4080TASA supports a common-mode input voltage range of 4.5V to 76V on its RS+ and RS- pins-fully independent of the VCC supply voltage. This allows direct connection to 48V telecom buses or 24V automotive batteries without external level-shifting circuitry. Absolute maximum ratings extend to 80V, but operation beyond 76V is not specified.
Does the MAX4080TASA require an external reference voltage?
No, the MAX4080TASA does not require an external reference voltage. As a unidirectional current-sense amplifier, it outputs a single-ended voltage proportional to VSENSE = (VRS+ – VRS-). In contrast, the bidirectional MAX4081TASA requires REF1A/REF1B connections to set the zero-current output level-making MAX4080TASA simpler for charge-only monitoring.
What is the full-scale sense voltage for the MAX4080TASA?
The MAX4080TASA has a full-scale sense voltage of ±250mV, corresponding to its 20V/V gain. At this input, the output swings from near GND to near VCC (e.g., 0V to 5V with 5V supply). This value is confirmed in the datasheet's DC Electrical Characteristics table under "Full-Scale Sense Voltage" for T-suffix devices.
Can the MAX4080TASA be used in bidirectional current sensing applications?
No, the MAX4080TASA is strictly unidirectional. Its output responds only to positive VSENSE (VRS+ > VRS-) and cannot indicate reverse current flow. For bidirectional sensing-including battery charge/discharge monitoring-use the pin-compatible MAX4081TASA, which adds REF1A/REF1B inputs and polarity-aware output swing around a user-defined reference.
What package type and footprint does the MAX4080TASA use?
The MAX4080TASA uses an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC outline and 1.27mm pitch. Its land pattern matches industry-standard SOIC-8 footprints, enabling drop-in replacement in existing layouts designed for similar amplifiers. The package code "S" in TASA explicitly denotes SO packaging.
MAX4080TASA 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:
- 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 FAQ
1.How can I place an order for MAX4080TASA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4080TASA 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 reliable?
The price and inventory of MAX4080TASA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4080TASA is usually 5 days.
3.What payment methods are accepted for MAX4080TASA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4080TASA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4080TASA?
MAX4080TASA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4080TASA 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?
For technical support, including MAX4080TASA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4080TASA requirements.
6.How does Aetrix verify that MAX4080TASA is sourced from the original manufacturer or authorized distributors?
All MAX4080TASA 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 meets industry standards.
7.What is the process for return or replacement of MAX4080TASA?
All MAX4080TASA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4080TASA, 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 part is unused and in its original packaging.
Return procedure for MAX4080TASA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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