My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4377HAUA+T
- Part No.:
- MAX4377HAUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4377HAUA+T.pdf
- Description:
- IC CURRENT SENSE 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:503
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4377HAUA+T from Maxim Integrated is a dual-channel, high-side current-sense amplifier with fixed +100V/V gain, 0V to +28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, and 1.2MHz bandwidth. It operates from +3V to +28V supply, draws 1mA per channel, and supports automotive temperature range (−40°C to +125°C), enabling precise battery-current monitoring in notebook computers and smart battery packs.
For engineers reviewing the MAX4377HAUA+T datasheet, MAX4377HAUA+T pinout, MAX4377HAUA+T application, or MAX4377HAUA+T equivalent, key selection criteria include guaranteed high-accuracy sensing down to 0V common-mode, buffered 2mA-output voltage interface compatible with ADC inputs, AEC-Q100 qualification for automotive use, and dual-channel integration in an 8-pin µMAX package.
Technical Context
The MAX4377HAUA+T implements a precision high-side current-sense architecture using internal matched resistors and a current-mirror-based gain stage, delivering fixed +100V/V output scaling without external gain-setting components. Its input common-mode range remains fully functional from 0V to +28V regardless of VCC, enabling direct connection to deeply discharged battery terminals.
Each channel features a buffered voltage output capable of driving up to 2mA into ground-referenced loads, with total output voltage error as low as ±0.5% at +25°C and ±5.5% over full temperature range. The device achieves 1.2MHz small-signal bandwidth at G = +100V/V and supports fast transient response (400ns setting time to 1%) for use in battery-charger control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - Fixed internal gain scales sense voltage (VRS+ − VRS−) directly to output; eliminates need for external gain resistors. |
| Common-Mode Input Range | 0V to +28V - Operates reliably even when battery pack voltage drops below 1V; independent of VCC. |
| Total Output Voltage Error | ±0.5% (typ, +25°C) - Enables high-precision current measurement without calibration in most applications. |
| Supply Voltage Range | +3V to +28V - Supports wide-input power systems including 12V/24V automotive and multi-cell Li-ion battery rails. |
| Bandwidth (G = +100) | 1.2MHz - Sufficient for closed-loop battery charger feedback and fast load transient detection. |
| Supply Current per Channel | 1mA (typ) - Low quiescent current preserves battery life in portable and always-on monitoring systems. |
| Operating Temperature | −40°C to +125°C - Qualified for under-hood automotive and industrial embedded environments. |
Pinout & Package
MAX4377HAUA+T is housed in an 8-pin µMAX® package (outline 21-0036, land pattern 90-0092), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. RoHS-compliant, lead-free, tape-and-reel format.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUT1, OUT2 | Buffered voltage outputs proportional to sensed current; each drives up to 2mA into ground-referenced loads. |
| 2, 6 | RS1−, RS2− | Load-side terminals of external sense resistors; connect to low side of RSENSE for each channel. |
| 3, 5 | RS1+, RS2+ | Power-side terminals of external sense resistors; connect to high side (e.g., battery+) for high-side sensing. |
| 4 | GND | Analog ground reference for internal circuitry and output buffer; must be connected to system ground plane. |
| 8 | VCC | Positive supply input; powers both channels; accepts +3V to +28V with no reverse-polarity protection. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +100V/V gain | Eliminates external gain resistors and associated layout sensitivity, reducing BOM count and improving long-term stability. |
| 0V to +28V common-mode range | Enables accurate current monitoring during deep battery discharge (<1V) without signal loss or offset drift. |
| ±0.5% full-scale accuracy (typ) | Supports high-resolution fuel gauging and overcurrent protection without factory calibration in most designs. |
| Buffered 2mA output drive | Directly interfaces with standard SAR or delta-sigma ADCs without external op-amp buffering or level-shifting. |
| AEC-Q100 qualified | Validated for automotive applications including battery management systems (BMS) and body control modules. |
Applications
| Smart Battery Fuel Gauging | Battery Charger Feedback Loop |
|---|---|
|
Use Scenario: Real-time bidirectional current monitoring in laptop smart battery packs to compute state-of-charge (SoC) and detect charge/discharge termination. IC Role / Device Role / Timing Role: Dual-channel high-side current sensor providing isolated, ground-independent analog voltage outputs proportional to charge and discharge currents. Use Value: Enables <1% SoC error over full battery cycle using only internal +100V/V gain and ±0.5% accuracy-no external calibration required. |
Use Scenario: Closed-loop current regulation in switched-mode battery chargers where fast response to load transients prevents overvoltage or thermal runaway. IC Role / Device Role / Timing Role: High-bandwidth (+100V/V, 1.2MHz) current feedback element feeding error amplifier in charger controller IC. Use Value: 400ns output settling time ensures stable loop dynamics even with aggressive charge profiles (e.g., USB PD 3.0 PPS). |
| Automotive Body Control Module | Portable System Power Management |
|
Use Scenario: Monitoring current draw of lighting, HVAC, and infotainment subsystems in 12V/24V vehicle electrical architecture. IC Role / Device Role / Timing Role: Dual-channel high-side monitor interfacing with microcontroller ADC to detect short-circuit faults and implement load shedding. Use Value: −40°C to +125°C operation and AEC-Q100 qualification ensure reliability across engine bay and cabin environments. |
Use Scenario: Board-level current supervision in handheld medical devices and industrial IoT sensors requiring ultra-low-power operation and battery longevity. IC Role / Device Role / Timing Role: Dual-channel current monitor with 1mA/channel supply current, enabling continuous monitoring without compromising standby runtime. Use Value: 0V common-mode capability allows sensing on single-cell Li-ion (2.5V–4.2V) while maintaining full accuracy down to end-of-discharge. |
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 |
|---|---|---|---|
| MAX4005AUA+ | +50V/V fixed gain; 2.5MHz bandwidth; same 8-pin µMAX package; ±0.75% full-scale error over temp. | Higher bandwidth suits faster control loops; lower gain requires larger sense resistor for same output swing. | Select when higher speed (>2MHz) and moderate gain suffice, and tighter error budget is acceptable. |
| INA240A2DGNR | +50V/V gain; 4V/V to 500V/V programmable via external resistor; SO-8 package; ±0.2% max gain error. | Programmable gain offers flexibility across multiple current ranges; higher precision but higher cost and layout complexity. | Select when design requires multiple gain configurations or sub-0.5% gain error across temperature. |
Compared with MAX4377HAUA+T, MAX4005AUA+ trades gain for speed and slightly relaxed accuracy, while INA240A2DGNR adds programmability and precision at the cost of external component dependency and reduced integration density.
Availability
MAX4377HAUA+T is available at Aetrix Electronics and suitable for notebook computers, automotive battery management systems, and portable power management applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX4377HAUA+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 industrial, automotive, and computing markets.
The MAX4377HAUA+T belongs to the MAX4376/MAX4377/MAX4378 family of high-side current-sense amplifiers designed specifically for accurate, ground-independent current monitoring in battery-powered and automotive systems.
FAQ
What is the maximum common-mode voltage the MAX4377HAUA+T can handle?
The MAX4377HAUA+T supports a common-mode input voltage range of 0V to +28V, fully independent of its supply voltage (VCC). This means it can accurately sense current even when the battery or power rail drops to 0V-critical for deep-discharge detection in smart battery systems. Absolute maximum rating extends to +30V on RS+ and RS− pins, but operation beyond +28V is not guaranteed.
Does the MAX4377HAUA+T require external gain-setting resistors?
No, the MAX4377HAUA+T does not require external gain-setting resistors. It integrates a fixed +100V/V gain stage internally, eliminating component count, layout sensitivity, and drift associated with external resistor networks. This simplifies design, improves long-term accuracy, and reduces PCB area-especially valuable in space-constrained portable and automotive applications.
Is the MAX4377HAUA+T qualified for automotive use?
Yes, the MAX4377HAUA+T is AEC-Q100 qualified for automotive applications. It operates across the full automotive temperature range of −40°C to +125°C and meets stress-test requirements for reliability in harsh environments such as engine compartments and battery enclosures. Its 0V–28V common-mode range and robust ESD tolerance further support under-hood deployment.
Can the MAX4377HAUA+T be used for bidirectional current sensing?
The MAX4377HAUA+T itself is unidirectional-it outputs a positive voltage proportional to current flowing from RS+ to RS−. However, it is commonly used in pairs (e.g., one channel for charge, one for discharge) or with external circuitry (e.g., level-shifting op-amps) to implement bidirectional monitoring. The MAX4377HAUA+T's dual-channel architecture and matched performance make it well-suited for such implementations in smart battery fuel gauges.
What is the output drive capability of the MAX4377HAUA+T?
The MAX4377HAUA+T provides buffered voltage outputs capable of sourcing or sinking up to 2mA per channel into ground-referenced loads. This allows direct connection to standard 12-bit or 16-bit SAR ADCs without additional buffering, reducing system cost and board area. Output voltage swing is rail-to-rail within 1.2V of VCC (high) and 40mV above GND (low) under 200µA load.
MAX4377HAUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2 MHz
- Current - Input Bias:
- 120 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 1mA (x2 Channels)
- 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:
- 8-uMAX/uSOP
MAX4377HAUA+T FAQ
1.How can I place an order for MAX4377HAUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4377HAUA+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 MAX4377HAUA+T reliable?
The price and inventory of MAX4377HAUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4377HAUA+T is usually 5 days.
3.What payment methods are accepted for MAX4377HAUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4377HAUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4377HAUA+T?
MAX4377HAUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4377HAUA+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 MAX4377HAUA+T?
For technical support, including MAX4377HAUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4377HAUA+T requirements.
6.How does Aetrix verify that MAX4377HAUA+T is sourced from the original manufacturer or authorized distributors?
All MAX4377HAUA+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 MAX4377HAUA+T meets industry standards.
7.What is the process for return or replacement of MAX4377HAUA+T?
All MAX4377HAUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4377HAUA+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 MAX4377HAUA+T part is unused and in its original packaging.
Return procedure for MAX4377HAUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4377HAUA+T Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
