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Analog Devices Inc./Maxim Integrated MAX4374FESD+
- Part No.:
- MAX4374FESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4374FESD+.pdf
- Description:
- IC AMP COMP REF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
MAX4374FESD+ from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated latching comparator and 600mV bandgap reference, designed for overcurrent supervision in battery-powered systems. It features +50V/V gain, 0V to +28V input common-mode range independent of supply voltage, 1mV max input offset voltage, and operates from +2.7V to +28V with only 50µA supply current. It is used in smart battery chargers to detect overcurrent without disrupting ground paths.
For engineers reviewing the MAX4374FESD+ datasheet, MAX4374FESD+ pinout, MAX4374FESD+ application, or MAX4374FESD+ equivalent, key selection considerations include its latched comparator output for stable fault flagging, dual-comparator capability (vs. MAX4373), +50V/V fixed gain, 14-pin SO package, and compatibility with deep-discharge battery monitoring down to 0V common-mode.
Technical Context
The MAX4374FESD+ implements a precision current-sense amplifier with rail-to-rail common-mode operation (0V to +28V), enabling accurate sensing even when battery voltage collapses below 2V. Its internal 600mV reference feeds two comparators: one latched (CIN1 → COUT1) for overcurrent shutdown, and one unlatched (CIN2 ↔ COUT2) supporting window-detection configurations.
Unlike the MAX4373, the MAX4374FESD+ includes a second comparator with configurable polarity - CIN2 serves as the positive input for MAX4374 (negative for MAX4375) - allowing flexible high/low threshold detection. The device uses an external sense resistor and requires no gain-setting resistors due to its voltage-output architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +50V/V - sets full-scale output at 100mV sense voltage × 50 = 5V output; enables precise mid-range current thresholds |
| Input Offset Voltage | ≤1mV - ensures ≤2% full-scale error at 50mV sense voltage, critical for low-current detection accuracy |
| Common-Mode Range | 0V to +28V, supply-independent - guarantees valid sensing during battery deep discharge (e.g., Li-ion <2.5V) |
| Supply Current | 50µA - extends runtime in always-on battery monitoring circuits; stable across 2.7–28V supply |
| Comparator Threshold | 600mV ±10mV - fixed internal reference enables consistent trip point without external components |
| Operating Temperature | −40°C to +85°C - qualified for industrial and portable equipment environments |
| Output Type | Open-drain latched comparator (COUT1) + open-drain unlatched comparator (COUT2) - supports both fault-hold and real-time window monitoring |
Pinout & Package
MAX4374FESD+ is housed in a 14-pin SO (Small Outline) package, RoHS-compliant and lead(Pb)-free. Pin count and layout match industry-standard 14-SO footprint (outline 21-0041, land pattern 90-0096).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13 | No Connection (N.C.) | Not internally bonded; must be left floating or tied to GND per layout best practice |
| 9 | RS+ | High-side sense resistor connection to load/battery positive; accepts up to +28V common-mode |
| 14 | RS− | High-side sense resistor connection to power path; differential input with RS+ defines VSENSE |
| 11 | OUT | Voltage-output current-sense amplifier stage; delivers VOUT = 50 × (VRS+ − VRS−) |
| 12 | CIN1 | Positive input of latched comparator; triggers COUT1 when >600mV relative to internal reference |
| 13 | CIN2 | Positive input of unlatched comparator (MAX4374); enables high-threshold window detection |
| 3 | COUT1 | Open-drain latched comparator output; holds fault state until RESET pulse clears latch |
| 4 | COUT2 | Open-drain unlatched comparator output; responds immediately to CIN2 crossing 600mV |
| 5 | RESET | Active-low latch control; <0.8V disables latch (transparent mode); >2.0V enables latching |
| 6 | VCC | Power supply input; operates from +2.7V to +28V; bypass with 0.1µF ceramic capacitor |
| 7 | GND | Analog ground reference; substrate connected to GND per chip design |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bandgap reference | ±1.6% accuracy 600mV reference eliminates need for external precision voltage source |
| Latching comparator output | COUT1 remains asserted after overcurrent event until explicit RESET pulse - prevents oscillation during fault recovery |
| Dual-comparator architecture | Separate CIN1/COUT1 (latched) and CIN2/COUT2 (unlatched) enables simultaneous overcurrent and window-detection functions |
| Zero-drift current-sense amplifier | 1mV max input offset ensures <2% full-scale error at 50mV sense voltage - critical for low-current battery monitoring |
| Supply-independent common-mode range | 0V to +28V operation regardless of VCC value - maintains functionality during brownout or deep battery discharge |
Applications
| Smart Battery Charger Protection | Portable System Power Management |
|---|---|
Use Scenario: Monitoring charge current in Li-ion battery packs during CC/CV charging phase to prevent overcurrent damage. IC Role / Device Role / Timing Role: High-side current-sense amplifier converts shunt voltage to proportional output; latched comparator flags overcurrent condition to disable charging FET. Use Value: Enables reliable, ground-path-intact protection without compromising charger ground integrity or requiring isolated sensing. | Use Scenario: Real-time load current supervision in handheld medical devices to trigger low-battery alerts or power-down sequences. IC Role / Device Role / Timing Role: Voltage-output amplifier provides analog current telemetry to MCU ADC; dual comparators support programmable under/over-current thresholds. Use Value: Reduces BOM count by integrating reference, amplifier, and dual comparators - cuts PCB area vs. discrete solutions. |
| Notebook Computer Battery Monitoring | Industrial DC Power Supply Supervision |
Use Scenario: Detecting short-circuit events on main system rail powered by removable battery pack. IC Role / Device Role / Timing Role: High-side amplifier senses fault current; latched COUT1 asserts permanent flag until host MCU issues RESET command. Use Value: Prevents thermal runaway by ensuring sustained shutdown - avoids repeated tripping that could overheat MOSFETs or connectors. | Use Scenario: Monitoring output current of 24V industrial DC-DC converter to enforce safe operating area limits. IC Role / Device Role / Timing Role: Dual-comparator configuration (CIN1 + CIN2) implements window detection: COUT1/COUT2 wired OR'ed to signal "current out-of-window". Use Value: Supports fail-safe operation - detects both overload (high-current) and open-load (low-current) faults with single IC. |
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 |
|---|---|---|---|
| MAX4374HESD+ | +100V/V gain (vs. +50V/V); same 14-SO package, temperature range, and dual-comparator architecture | Better suited for low-current (<1A) sensing where 100mV full-scale yields higher resolution at lower sense resistor power loss | Select MAX4374HESD+ when full-scale sense voltage must be ≤100mV and higher gain improves SNR at microamp-level loads |
| MAX4375FESD+ | Same +50V/V gain and 14-SO package, but CIN2 polarity inverted (CIN2 = negative input) - enables low-threshold window detection | Optimized for undercurrent detection (e.g., open-wire fault) rather than overcurrent; requires different external resistor network | Choose MAX4375FESD+ when primary requirement is detecting current drop below threshold, not exceedance |
Compared with MAX4374FESD+, MAX4374HESD+ offers doubled gain for improved low-current resolution but reduced full-scale range, while MAX4375FESD+ retains identical gain and package but reverses CIN2 polarity to support undercurrent-triggered alarms - all three share identical supply, temperature, and accuracy specs.
Availability
MAX4374FESD+ is available at Aetrix Electronics and suitable for smart battery chargers, portable medical devices, notebook computer power management, and industrial DC power supply supervision requiring stable component supply and long-term lifecycle support.
Supply support for MAX4374FESD+ 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 interface applications, with emphasis on low-power, high-reliability solutions for portable and industrial systems.
The MAX4373/MAX4374/MAX4375 product line was engineered specifically for high-side current monitoring in battery-powered equipment, integrating amplifier, reference, and dual comparators to eliminate discrete component count and ground-path interference.
FAQ
What is the function of the RESET pin on the MAX4374FESD+?
The RESET pin controls the latching behavior of the CIN1 comparator. When RESET is held high (>2.0V), the COUT1 output latches upon overcurrent detection and remains asserted until RESET is pulsed low (<0.8V) for ≥1.5µs. Holding RESET low makes the comparator transparent - COUT1 follows CIN1 in real time. This dual-mode operation allows flexible fault handling in the MAX4374FESD+.
Does the MAX4374FESD+ support window-detection functionality?
Yes, the MAX4374FESD+ supports window detection using its dual-comparator architecture. CIN1 drives the latched COUT1 (for upper threshold), and CIN2 drives the unlatched COUT2 (for lower threshold in MAX4374 configuration). By wiring COUT1 and COUT2 together with pull-up resistors, the combined output goes low when current falls outside the defined window - a capability confirmed in the MAX4374FESD+ datasheet Figure 3 and Applications section.
What is the maximum common-mode voltage the MAX4374FESD+ can handle?
The MAX4374FESD+ supports a 0V to +28V input common-mode range at RS+ and RS−, and this range is fully independent of the VCC supply voltage. This means it remains functional even when VCC is at minimum +2.7V and the sensed battery voltage drops to 0V - a critical feature for deep-discharge monitoring in Li-ion and NiMH battery systems using the MAX4374FESD+.
Can the MAX4374FESD+ be used for low-side current sensing?
While the MAX4374FESD+ is optimized for high-side sensing, it can be used for low-side configurations. However, total output voltage error increases significantly when VRS+ falls below 2V - as documented in the Electrical Characteristics table and Typical Operating Characteristics plots (toc02, toc04). For precision low-side applications, dedicated low-side amplifiers are recommended; the MAX4374FESD+ excels where ground-path integrity is paramount.
What package type and pin count does the MAX4374FESD+ use?
The MAX4374FESD+ is supplied in a 14-pin SO (Small Outline) package, RoHS-compliant and lead(Pb)-free, with outline number 21-0041 and land pattern 90-0096. It contains 6 active pins (RS+, RS−, OUT, CIN1, CIN2, COUT1, COUT2, RESET, VCC, GND) and 4 no-connect (N.C.) pins - matching the pinout shown in the official Maxim datasheet Figure "Pin Configurations" for MAX4374.
MAX4374FESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-SOIC
MAX4374FESD+ FAQ
1.How can I place an order for MAX4374FESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4374FESD+ 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 MAX4374FESD+ reliable?
The price and inventory of MAX4374FESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4374FESD+ is usually 5 days.
3.What payment methods are accepted for MAX4374FESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4374FESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4374FESD+?
MAX4374FESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4374FESD+ 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 MAX4374FESD+?
For technical support, including MAX4374FESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4374FESD+ requirements.
6.How does Aetrix verify that MAX4374FESD+ is sourced from the original manufacturer or authorized distributors?
All MAX4374FESD+ 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 MAX4374FESD+ meets industry standards.
7.What is the process for return or replacement of MAX4374FESD+?
All MAX4374FESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4374FESD+, 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 MAX4374FESD+ part is unused and in its original packaging.
Return procedure for MAX4374FESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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