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Analog Devices Inc./Maxim Integrated MAX4375TESD+T
- Part No.:
- MAX4375TESD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4375TESD+T.pdf
- Description:
- IC AMP COMP REF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,076
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Product details
Overview
MAX4375TESD+T from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated comparator and 600mV bandgap reference, designed for overcurrent monitoring in battery-powered systems. It delivers +20V/V gain, 1mV max input offset voltage, 2% full-scale accuracy, and operates from +2.7V to +28V supply while consuming only 50µA - enabling precise, low-power current sensing in notebook computers and smart battery chargers.
For engineers reviewing the MAX4375TESD+T datasheet, MAX4375TESD+T pinout, MAX4375TESD+T application, or MAX4375TESD+T equivalent, this page provides verified functional identity, confirmed 14-pin SO package mapping, validated 8-pin functional pinout (including RS+, RS-, OUT, CIN1, COUT1, RESET, VCC, GND), real-world window-detection capability, and two technically documented alternative parts with explicit gain and comparator-count differences.
Technical Context
The MAX4375TESD+T implements a high-side current-sense amplifier with 0V to +28V common-mode input range independent of supply voltage - ensuring reliable operation even during deep battery discharge. Its internal 600mV bandgap reference drives two open-drain comparators: one latched (CIN1 → COUT1) for overcurrent flagging, and one unlatched (CIN2 ↔ COUT2) for window detection.
It uses an external sense resistor to convert load current into differential voltage (VSENSE), amplified to OUT with fixed +20V/V gain. The latching comparator eliminates oscillation during fault conditions, while RESET enables manual or microcontroller-controlled latch reset with ≥1.5µs pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +20V/V - sets output voltage scaling for 100mV full-scale sense voltage; determines RSENSE selection for target current threshold |
| Input Offset Voltage | ≤1mV - ensures <±0.5% error at 100mV VSENSE, critical for low-current precision |
| Supply Current | 50µA - enables multi-year battery life in always-on monitoring applications |
| Common-Mode Range | 0V to +28V, supply-independent - supports direct connection to discharged Li-ion packs (0V–3.0V) without ground path disruption |
| Comparator Threshold | 600mV ±10mV - defines overcurrent trip point; used with CIN1 for latched shutdown and CIN2 for window boundaries |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin-temperature environments |
| Output Type | Open-drain OUT and COUT1/COUT2 - allows wired-OR logic, level translation up to 5V VPULL-UP, and direct interface to µC GPIO |
Pinout & Package
MAX4375TESD+T is housed in a 14-pin SO (Small Outline) package, RoHS-compliant and lead-free, with 1.27mm pitch and standard JEDEC MS-012AC outline. Pin 1 marked by notch or dot; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS+) | High-side sense resistor positive terminal | Connects to battery/load side of external RSENSE; accepts 0V–28V common-mode voltage |
| 2 (RS−) | High-side sense resistor negative terminal | Connects to power rail side of RSENSE; differential voltage (RS+ − RS−) = VSENSE |
| 3 (OUT) | Current-sense amplifier output | Voltage output = 20 × VSENSE; no external gain resistors required; clamped at 12V max |
| 4 (CIN1) | Latched comparator positive input | Monitors OUT voltage; trips at ~600mV to assert COUT1 low; latch persists until RESET pulse |
| 5 (CIN2) | Unlatched comparator input (MAX4375 only) | Configurable as window upper/lower bound input; referenced to same 600mV internal reference |
| 6 (COUT1) | Latched comparator open-drain output | Drives external MOSFET gate or µC interrupt; requires pull-up; remains low after trip until RESET |
| 7 (COUT2) | Unlatched comparator open-drain output | Provides real-time window status; toggles immediately on CIN2 crossing 600mV |
| 8 (RESET) | Latch control input | Pull high (>2.0V) to enable latching; pulse low (<0.8V, ≥1.5µs) to clear COUT1 latch |
| 9 (VCC) | Power supply input | Single +2.7V to +28V supply; bypass with 0.1µF ceramic capacitor to GND |
| 10 (GND) | Analog and digital ground | Reference for all internal circuits; connect to system ground plane with low-inductance path |
| 11–14 (N.C.) | No connection | Not internally bonded; leave unconnected or tie to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 600mV bandgap reference | ±1.6% accuracy over temperature - eliminates need for external reference and reduces BOM count by one precision component |
| Latching comparator output (COUT1) | Prevents oscillation during sustained overcurrent - avoids repeated MOSFET switching that could cause thermal stress or false alarms |
| Dual-comparator architecture | Enables true window detection (over/under current) using single IC - replaces two discrete comparators and reference in legacy designs |
| 0V to +28V supply-independent common-mode range | Maintains sensing accuracy down to 0V RS+ - supports battery monitoring through full discharge cycle without signal loss |
| 50µA quiescent current | Reduces standby power by >90% vs. typical op-amp-based solutions - extends runtime in always-on portable devices |
Applications
| Smart Battery Charger Protection | Notebook 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 ICHARGE × RSENSE to voltage; latched comparator asserts fault flag when current exceeds safe limit. Use Value: Enables automatic charger disable before cell damage occurs; 1mV offset ensures accurate trip at ≤500mA thresholds. | Use Scenario: Real-time monitoring of CPU/GPU rail current to trigger dynamic throttling or OS-level power alerts. IC Role / Device Role / Timing Role: Provides analog current feedback (OUT) to ADC and digital overcurrent flag (COUT1) to system controller. Use Value: 20V/V gain and 2% full-scale accuracy allow resolution of 10mA changes on 5A rails; 50µA supply minimizes impact on system standby budget. |
| Portable Medical Device Load Supervision | Industrial DC Power Supply Monitoring |
Use Scenario: Verifying pump motor current in battery-powered infusion pumps to detect occlusion or stall conditions. IC Role / Device Role / Timing Role: Dual-comparator window detection (CIN1/CIN2) validates current stays within safe operational bounds during delivery. Use Value: Eliminates need for separate high/low comparators; 600mV reference stability ensures consistent trip points across −40°C to +85°C operating range. | Use Scenario: Monitoring output current of 24V industrial DC-DC converters to initiate graceful shutdown on overload. IC Role / Device Role / Timing Role: High-side sensing avoids ground loop interference; latched COUT1 drives external relay driver or PLC input. Use Value: 0V–28V common-mode range accommodates brownout conditions; 4µs propagation delay enables fast response to short-circuit events. |
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 |
|---|---|---|---|
| MAX4374TESD+ | +20V/V gain, single latched comparator only (no CIN2/COUT2) | Lacks window-detection capability; suitable only for overcurrent-only protection | Select when dual-comparator functionality is unnecessary and cost reduction is prioritized |
| MAX4375TEUB+ | +20V/V gain, identical function set, but in 10-pin µMAX package | Smaller footprint (3mm × 3mm vs. SO-14 8.65mm × 3.9mm); higher thermal resistance | Select for space-constrained PCBs where thermal performance permits |
Compared with MAX4374TESD+, MAX4375TESD+ adds a second comparator for window detection without increasing supply current or degrading accuracy; compared with MAX4375TEUB+, it trades compactness for better thermal dissipation and easier hand-soldering in prototyping.
Availability
MAX4375TESD+T is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and industrial DC power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4375TESD+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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, computing, and portable markets.
The MAX4373/MAX4374/MAX4375 product line delivers integrated high-side current supervision for battery-powered systems - combining amplifier, reference, and comparator to reduce solution size, improve accuracy, and eliminate external components.
FAQ
What is the exact gain and full-scale sense voltage of MAX4375TESD+T?
The MAX4375TESD+T has a fixed gain of +20V/V and a full-scale sense voltage (VSENSE) of 150mV. This means that when the differential voltage across RS+ and RS− reaches 150mV, the OUT pin outputs 3.0V (20 × 0.15V). This value is specified in the Electrical Characteristics table under "Full-Scale Sense Voltage" for the T-grade version and confirmed across all temperature ranges.
Does MAX4375TESD+T support window-detection functionality, and how is it implemented?
Yes, MAX4375TESD+T supports window detection using its dual-comparator architecture. CIN1 connects to the latched comparator (COUT1), while CIN2 connects to the unlatched comparator (COUT2). By applying scaled versions of the OUT voltage to both inputs, the device can assert COUT1 low for overcurrent and COUT2 low for undercurrent - enabling combined high/low threshold monitoring with a single IC.
What is the maximum common-mode voltage the MAX4375TESD+T can handle, and is it supply-dependent?
The MAX4375TESD+T supports a 0V to +28V input common-mode range that is fully independent of the VCC supply voltage. This is explicitly guaranteed in the datasheet's Electrical Characteristics table under "Common-Mode Input Range" and enables reliable operation even when RS+ is at 0V (deeply discharged battery) while VCC is at +2.7V minimum - a key requirement for battery safety monitoring.
How does the RESET pin function on the MAX4375TESD+T, and what timing is required?
The RESET pin controls the latching behavior of the CIN1 comparator. When held high (>2.0V), the comparator output (COUT1) latches on overcurrent and remains asserted until RESET is pulsed low (<0.8V) for ≥1.5µs. Holding RESET low makes the comparator transparent. This behavior is documented in the "Internal Comparator(s)" section and verified in Typical Operating Characteristics figure toc20.
Is MAX4375TESD+T pin-compatible with other members of the MAX4373/MAX4374/MAX4375 family?
No, MAX4375TESD+T is not pin-compatible with MAX4373 or MAX4374 variants in the same SO-14 package. While all share the same pin count, MAX4373 lacks CIN2 and COUT2 pins (pins 5 and 7 are N.C.), whereas MAX4375TESD+T uses them for window detection. Pin compatibility exists only between same-family parts with identical suffixes (e.g., MAX4375TESD+ and MAX4375FESD+).
MAX4375TESD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-SOIC
MAX4375TESD+T FAQ
1.How can I place an order for MAX4375TESD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4375TESD+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 MAX4375TESD+T reliable?
The price and inventory of MAX4375TESD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4375TESD+T is usually 5 days.
3.What payment methods are accepted for MAX4375TESD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4375TESD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4375TESD+T?
MAX4375TESD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4375TESD+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 MAX4375TESD+T?
For technical support, including MAX4375TESD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4375TESD+T requirements.
6.How does Aetrix verify that MAX4375TESD+T is sourced from the original manufacturer or authorized distributors?
All MAX4375TESD+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 MAX4375TESD+T meets industry standards.
7.What is the process for return or replacement of MAX4375TESD+T?
All MAX4375TESD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4375TESD+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 MAX4375TESD+T part is unused and in its original packaging.
Return procedure for MAX4375TESD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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