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Analog Devices Inc./Maxim Integrated MAX9040BEUK+T
- Part No.:
- MAX9040BEUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX9040BEUK+T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,363
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Product details
Overview
MAX9040BEUK+T from Analog Devices is a micropower single-supply comparator with integrated 2.048V precision voltage reference in a 5-pin SOT23 package. It features rail-to-rail inputs/outputs, 40μA supply current at 2.7V, 400ns propagation delay, ±3mV internal hysteresis, and operates from 2.5V to 5.5V - ideal for battery-powered precision level detection in portable instrumentation.
For engineers reviewing the MAX9040BEUK+T datasheet, MAX9040BEUK+T pinout, MAX9040BEUK+T application, or MAX9040BEUK+T equivalent, key selection criteria include its B-grade 1% initial reference accuracy, 100ppm/°C tempco, rail-to-rail output sourcing/sinking capability, and compatibility with capacitive loads up to 4.7nF on the REF pin.
Technical Context
The MAX9040BEUK+T integrates a single high-precision comparator and a series-mode voltage reference sharing a common 2.5V–5.5V supply. Its input stage supports common-mode voltages from VEE −0.25V to VCC +0.25V, with typical 1pA bias current and ±1mV offset voltage over temperature.
The comparator uses internal hysteresis and a low-glitch push-pull output stage capable of sinking/sourceing 8mA, while the reference employs laser-trimmed thin-film resistors and curvature correction to achieve stable 2.048V output with 100ppm/°C temperature coefficient (B grade) and 4.7nF capacitive-load stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - enables direct operation from Li-ion, 3.3V, or 5V rails without regulation. |
| Supply Current | 40μA at 2.7V - extends battery life in always-on sensing nodes beyond 1 year with typical coin-cell capacity. |
| Reference Voltage | 2.048V ±1% (B grade) - matches standard 12-bit DAC full-scale codes for accurate threshold setting. |
| Tempco | 100ppm/°C - introduces ≤±0.85mV drift over −40°C to +85°C, suitable for industrial ambient monitoring. |
| Propagation Delay | 400ns at 100mV overdrive - supports reliable detection of fast transients in power sequencing or fault response. |
| Input Common-Mode Range | VEE −0.25V to VCC +0.25V - allows direct interface to sensors operating beyond supply rails (e.g., thermocouples). |
| Capacitive Load Stability | 0–4.7nF on REF - permits local decoupling without oscillation, simplifying layout in noise-sensitive analog front-ends. |
Pinout & Package
MAX9040BEUK+T is housed in a RoHS-compliant 5-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with industry-standard 5-lead SC-70/SOT-23 variants and optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Comparator Output | Rail-to-rail push-pull stage sourcing/sinking up to 8mA - drives logic inputs directly without external pull-up. |
| 2 (IN−) | Comparator Inverting Input | Uncommitted input - configurable as threshold reference or feedback node for hysteresis or window detection. |
| 3 (VEE) | Negative Supply | Ground reference pin - must be connected to system GND; supports true single-supply operation. |
| 4 (REF) | Voltage Reference Output | Stable 2.048V source with ±1% accuracy and 100ppm/°C drift - used as comparator reference or ADC reference. |
| 5 (VCC) | Positive Supply | Primary power input - accepts 2.5V–5.5V; powers both comparator and reference circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 40μA quiescent current enables >10-year battery life in low-duty-cycle IoT sensor nodes. |
| Integrated Precision Reference | 2.048V B-grade reference eliminates need for external voltage divider or dedicated reference IC, reducing BOM count by one component. |
| Rail-to-Rail I/O | Full-swing input range (−0.25V to VCC+0.25V) and output swing (0V to VCC) maximize dynamic range in low-voltage systems. |
| Low-Glitch Output Stage | Minimal supply current surge during switching reduces required bypass capacitance and eases EMI filtering design. |
| Internal Hysteresis | ±3mV hysteresis prevents chatter on slow-moving signals (e.g., thermistor outputs), eliminating need for external positive feedback. |
Applications
| Precision Battery Management | Window Comparators |
|---|---|
Use Scenario: Monitoring cell voltage in multi-cell Li-ion packs to trigger charge termination or overvoltage protection. IC Role / Device Role / Timing Role: Comparator compares sensed cell voltage against 2.048V reference; output asserts fault signal when threshold exceeded. Use Value: B-grade 1% reference accuracy ensures ±20.5mV absolute trip point tolerance, meeting IEC 62133 safety margin requirements. | Use Scenario: Detecting valid signal presence in industrial analog input modules using dual-threshold validation. IC Role / Device Role / Timing Role: Single MAX9040BEUK+T provides reference for external hysteresis network; comparator output indicates in-window condition. Use Value: Rail-to-rail input range allows direct interface to ±10V field signals via resistor scaling, avoiding level-shifting op-amps. |
| IR Receivers | Level Translators |
Use Scenario: Demodulating 38kHz IR carrier bursts in remote control receivers with ambient light rejection. IC Role / Device Role / Timing Role: Comparator detects AC-coupled IR photodiode signal amplitude relative to DC-biased 2.048V reference. Use Value: 400ns propagation delay enables clean pulse edge detection at 38kHz carrier frequency with <1° phase error. | Use Scenario: Converting 5V logic signals to 3.3V microcontroller inputs in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Comparator uses 2.048V reference to define 3.3V logic-high threshold; rail-to-rail output drives 3.3V CMOS input directly. Use Value: Push-pull output eliminates external pull-up resistor, reducing standby current and board area in space-limited designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9040AEUK+T | A-grade reference: ±0.4% initial accuracy, 6ppm/°C tempco vs. B-grade's ±1%, 100ppm/°C | Required where tighter reference stability is critical (e.g., portable medical diagnostics requiring <0.1% measurement repeatability) | Select MAX9040AEUK+T when reference drift must remain below ±0.5mV over temperature; otherwise MAX9040BEUK+T offers cost advantage. |
| TLV4041IDBVR | Single comparator only (no integrated reference); requires external 2.048V reference (e.g., REF3020); 36μA supply current | Suitable when reference and comparator must be independently optimized (e.g., ultra-low-noise reference for high-resolution ADCs) | Choose TLV4041IDBVR if system already includes a precision reference; MAX9040BEUK+T reduces component count and layout complexity. |
Compared with MAX9040AEUK+T, the MAX9040BEUK+T trades reference accuracy and tempco for lower cost, while versus TLV4041IDBVR it delivers integrated functionality at slightly higher quiescent current but eliminates reference sourcing, routing, and decoupling design effort.
Availability
MAX9040BEUK+T is available at Aetrix Electronics and suitable for precision battery management, IR receivers, window comparators, and level translators requiring stable component supply across automotive, industrial, and portable electronics programs.
Supply support for MAX9040BEUK+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 threshold detection - combining comparator and reference in minimal footprints like SOT23 and UCSP.
FAQ
What is the reference voltage accuracy specification for MAX9040BEUK+T?
The MAX9040BEUK+T features a B-grade 2.048V voltage reference with ±1% initial accuracy at +25°C and a temperature coefficient of 100ppm/°C over −40°C to +85°C. This corresponds to a maximum reference deviation of ±20.5mV at room temperature and ±0.85mV drift across the full operating range, making it suitable for applications where moderate precision suffices.
Does MAX9040BEUK+T support rail-to-rail input operation?
Yes, the MAX9040BEUK+T comparator supports a common-mode input voltage range from VEE −0.25V to VCC +0.25V. This rail-to-rail capability allows direct interfacing with sensors or signals that exceed the supply rails - such as thermocouples or AC-coupled IR receiver outputs - without external level-shifting circuitry.
What is the maximum capacitive load the REF pin of MAX9040BEUK+T can drive?
The REF pin of MAX9040BEUK+T is stable with capacitive loads from 0 to 4.7nF, per the manufacturer's characterization. This eliminates the need for an output capacitor in most applications, though adding up to 4.7nF improves transient response during step-load changes - useful in systems with rapidly varying reference current demands.
Can MAX9040BEUK+T operate from a 2.5V supply?
Yes, MAX9040BEUK+T is fully specified for operation from 2.5V to 5.5V single supply. At 2.5V, it maintains 40μA supply current, 400ns propagation delay, and rail-to-rail output swing - enabling direct use with 2.5V logic families and low-voltage battery systems without LDO regulation.
How does the internal hysteresis of MAX9040BEUK+T improve system reliability?
The MAX9040BEUK+T incorporates ±3mV internal hysteresis to prevent output oscillation on slow-moving or noisy input signals - such as those from thermistors or potentiometers. This eliminates the need for external positive feedback resistors, simplifies design, and ensures clean, chatter-free switching essential for reliable power sequencing and fault detection.
MAX9040BEUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- 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 (±):
- 2.5V ~ 5.5V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 8mA
- Current - Output (Typ):
- 100µA
- 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-23-5
MAX9040BEUK+T FAQ
1.How can I place an order for MAX9040BEUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9040BEUK+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 MAX9040BEUK+T reliable?
The price and inventory of MAX9040BEUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9040BEUK+T is usually 5 days.
3.What payment methods are accepted for MAX9040BEUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9040BEUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9040BEUK+T?
MAX9040BEUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9040BEUK+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 MAX9040BEUK+T?
For technical support, including MAX9040BEUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9040BEUK+T requirements.
6.How does Aetrix verify that MAX9040BEUK+T is sourced from the original manufacturer or authorized distributors?
All MAX9040BEUK+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 MAX9040BEUK+T meets industry standards.
7.What is the process for return or replacement of MAX9040BEUK+T?
All MAX9040BEUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9040BEUK+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 MAX9040BEUK+T part is unused and in its original packaging.
Return procedure for MAX9040BEUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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