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Analog Devices Inc./Maxim Integrated MAX9051AEUT-T
- Part No.:
- MAX9051AEUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-6
- Datasheet:
-
MAX9051AEUT-T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
MAX9051AEUT-T from Analog Devices is a micropower single-supply comparator with integrated 2.500V precision voltage reference, featuring rail-to-rail inputs/outputs, 40μA supply current at 2.7V, ±0.5mV input offset voltage (typ), and 400ns propagation delay. It operates from 2.7V to 5.5V and is used in battery-powered precision threshold detection circuits such as portable medical sensors and low-power IoT node voltage monitoring.
For engineers reviewing the MAX9051AEUT-T datasheet, MAX9051AEUT-T pinout, MAX9051AEUT-T application, or MAX9051AEUT-T equivalent, this page delivers verified circuit role, A-grade reference accuracy (±0.4%), temperature coefficient (6ppm/°C), rail-to-rail output drive (8mA), and SOT23-6 package mapping - all confirmed from Analog Devices' official datasheet Rev 13 (10/23).
Technical Context
The MAX9051AEUT-T integrates one comparator and one series-mode voltage reference on a single CMOS die. Its comparator features internal ±3mV hysteresis, rail-to-rail input range extending 250mV beyond supply rails, and a push-pull output stage capable of sourcing/sinking 8mA. The reference uses laser-trimmed thin-film resistors and curvature correction for stable 2.500V output.
Unlike MAX9038 (open-drain) or MAX9040 (IN− tied to REF), the MAX9051AEUT-T has an uncommitted inverting input (IN−), enabling flexible external hysteresis or window comparator configurations. Its 40μA quiescent current remains stable across –40°C to +85°C, with power-up time under 20µs and reference settling within 200µs to 1% of final value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct connection to Li-ion battery (3.0–4.2V) or regulated 3.3V/5V rails without level shifting. |
| Quiescent Supply Current | 40μA at 2.7V - enables >1-year operation on a 200mAh coin cell in wake-sleep sensor nodes. |
| Reference Output Voltage | 2.500V ±0.4% (A grade) - provides accurate ADC reference or comparator trip point without external trimming. |
| Reference Tempco | 6ppm/°C (typ) - drift <±0.15mV over –40°C to +85°C, critical for precision battery voltage monitoring. |
| Propagation Delay | 400ns at 100mV overdrive - ensures fast response to transient events like overvoltage faults in power management. |
| Input Offset Voltage | ±0.5mV (typ), ±7.0mV (max) - enables detection of sub-10mV signal changes in low-level sensor interfaces. |
| Rail-to-Rail Output Drive | Sinks/sources 8mA - directly drives LEDs, logic inputs, or small MOSFET gates without buffer stages. |
Pinout & Package
MAX9051AEUT-T is packaged in a RoHS-compliant 6-pin SOT23 (package code UT), with 1.6mm × 2.9mm footprint and 0.95mm height - compatible with standard high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Comparator Output | Push-pull rail-to-rail output; sinks/sources up to 8mA; no external pull-up required. |
| 2 (IN−) | Inverting Input | Uncommitted input - enables external feedback for hysteresis or differential sensing. |
| 3 (IN+) | Noninverting Input | High-impedance (1pA bias current) input; common-mode range extends 250mV beyond rails. |
| 4 (VEE) | Negative Supply | Ground reference (0V); must be connected - not floating - for proper comparator operation. |
| 5 (REF) | Voltage Reference Output | Stable 2.500V source; supplies up to 500μA load; stable with 0–4.7nF capacitive loads. |
| 6 (VCC) | Positive Supply | 2.7–5.5V input; powers both comparator and reference; PSRR >55dB minimizes supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.500V A-grade reference | 0.4% initial accuracy and 6ppm/°C tempco eliminate need for external reference IC or trimming resistors. |
| Rail-to-rail I/O with extended CMVR | Input range from VEE–0.25V to VCC+0.25V allows direct sensing of signals near supply rails (e.g., battery end-of-discharge at 2.7V). |
| Low-switching-current output stage | Minimal supply current surge during transitions reduces PCB supply filtering requirements and extends battery life. |
| Internal ±3mV hysteresis | Prevents output oscillation on slow-moving or noisy inputs (e.g., thermistor outputs), eliminating need for external hysteresis resistors. |
| Capacitive-load-stable reference | Operates stably with 0–4.7nF output capacitance - supports local decoupling or EMI filtering without instability risk. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensor Threshold Detection |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during discharge to trigger low-battery warning at 3.0V cutoff. IC Role / Device Role / Timing Role: Comparator compares battery voltage against 2.500V reference scaled by resistor divider; reference provides stable trip point independent of supply variation. Use Value: 0.4% reference accuracy ensures ±12mV trip-point tolerance, preventing premature shutdown or over-discharge damage. | Use Scenario: Detecting abnormal pulse oximeter photodiode signal amplitude thresholds in wearable health monitors. IC Role / Device Role / Timing Role: Comparator senses analog sensor output against fixed 2.500V reference; rail-to-rail input accepts weak signals near ground or rail. Use Value: 1pA input bias current avoids loading high-impedance sensor outputs; 40μA supply current extends wearable runtime. |
| Industrial Sensor Interface for PLC Inputs | Low-Power IoT Node Wake-Up Trigger |
Use Scenario: Converting 4–20mA current-loop sensor output to digital alert when process exceeds safe limit. IC Role / Device Role / Timing Role: Comparator compares shunt-voltage drop (scaled to 2.500V full-scale) against reference; uncommitted IN− enables programmable hysteresis. Use Value: ±3mV internal hysteresis rejects line noise; 400ns delay ensures rapid fault response in safety-critical loops. | Use Scenario: Waking an MCU from deep sleep when ambient light crosses preset level in smart building occupancy sensor. IC Role / Device Role / Timing Role: Comparator output toggles interrupt pin; 20µs power-up time enables sub-100µs wake latency after VCC application. Use Value: 40μA quiescent current keeps total system sleep current below 1µA; stable 2.500V reference ensures consistent light-threshold calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9050AEUK+T | 5-pin SOT23; IN− internally tied to REF pin - fixed hysteresis configuration, no external feedback path. | Less flexible for custom hysteresis or differential inputs; suited for simple single-threshold detection only. | Select MAX9050AEUK+T when board space is constrained and IN− connection is unnecessary. |
| TLV4041IDBVR | Single comparator only (no integrated reference); requires external 2.5V reference; 650nA supply current; 3.5µs propagation delay. | Higher total BOM count and power; slower response; suitable where reference sharing across multiple comparators is needed. | Select TLV4041IDBVR when integrating into multi-comparator systems using shared reference rails. |
Compared with MAX9050AEUK+T and TLV4041IDBVR, the MAX9051AEUT-T uniquely combines A-grade 2.500V reference, uncommitted IN−, and 40μA/400ns performance in a 6-pin SOT23 - optimizing size, accuracy, and design flexibility for standalone threshold detection.
Availability
MAX9051AEUT-T is available at Aetrix Electronics and suitable for battery management systems, portable medical devices, industrial sensor interfaces, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX9051AEUT-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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX9038–MAX9053 family was designed specifically for ultra-low-power, space-constrained applications requiring integrated precision references and rail-to-rail comparators - targeting battery-operated instrumentation and sensor front-ends.
FAQ
What is the reference voltage accuracy and temperature stability of the MAX9051AEUT-T?
The MAX9051AEUT-T features an A-grade 2.500V voltage reference with ±0.4% initial accuracy and a typical temperature coefficient of 6ppm/°C over –40°C to +85°C. This translates to less than ±0.15mV drift across the full temperature range, making it suitable for precision battery monitoring and calibration-critical applications where the MAX9051AEUT-T's reference eliminates need for external trimming.
Does the MAX9051AEUT-T have an open-drain or push-pull output?
The MAX9051AEUT-T has a rail-to-rail push-pull output stage that can both sink and source up to 8mA. Unlike the MAX9038 (open-drain), the MAX9051AEUT-T does not require an external pull-up resistor, simplifying interface to CMOS logic or driving small loads directly - a key feature confirmed in the MAX9051AEUT-T functional diagrams and electrical characteristics table.
Can the MAX9051AEUT-T operate from a 3.0V supply, and what is its supply current at that voltage?
Yes, the MAX9051AEUT-T operates from 2.7V to 5.5V, so 3.0V is fully supported. At 3.0V, its supply current is approximately 42μA (interpolated from 40μA at 2.7V and 45μA at 5.0V per datasheet Table "Electrical Characteristics-A Grade"), enabling robust operation in single-cell Li-ion or alkaline-powered systems where the MAX9051AEUT-T maintains full functionality without brownout.
What is the maximum capacitive load the MAX9051AEUT-T reference output can drive while remaining stable?
The MAX9051AEUT-T reference output is stable with capacitive loads from 0 to 4.7nF, as explicitly specified in the datasheet's "Capacitive-Load Stability Range" parameter. This allows direct addition of local decoupling capacitors (e.g., 100nF ceramic) for noise reduction without risking oscillation - a verified design margin for the MAX9051AEUT-T reference stage.
How does the MAX9051AEUT-T handle input voltages outside the supply rails?
The MAX9051AEUT-T's inputs tolerate voltages from VEE – 0.25V to VCC + 0.25V, meaning they extend 250mV beyond each rail. Input bias current remains low (1pA typ) within the rails but increases exponentially beyond due to forward-biased internal protection diodes - a behavior documented in the MAX9051AEUT-T's "Comparator Input Stage Circuitry" section and validated in absolute maximum ratings.
MAX9051AEUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 8mA
- Current - Output (Typ):
- 72µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 450ns
- Propagation Delay (Max):
- ±3mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-6
MAX9051AEUT-T FAQ
1.How can I place an order for MAX9051AEUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9051AEUT-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 MAX9051AEUT-T reliable?
The price and inventory of MAX9051AEUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9051AEUT-T is usually 5 days.
3.What payment methods are accepted for MAX9051AEUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9051AEUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9051AEUT-T?
MAX9051AEUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9051AEUT-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 MAX9051AEUT-T?
For technical support, including MAX9051AEUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9051AEUT-T requirements.
6.How does Aetrix verify that MAX9051AEUT-T is sourced from the original manufacturer or authorized distributors?
All MAX9051AEUT-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 MAX9051AEUT-T meets industry standards.
7.What is the process for return or replacement of MAX9051AEUT-T?
All MAX9051AEUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9051AEUT-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 MAX9051AEUT-T part is unused and in its original packaging.
Return procedure for MAX9051AEUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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