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Analog Devices Inc./Maxim Integrated MAX9042BEUA+
- Part No.:
- MAX9042BEUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9042BEUA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,634
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Product details
Overview
MAX9042BEUA+ from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference in an 8-pin µMAX package. It operates from 2.5V to 5.5V, draws only 55µA supply current, features rail-to-rail inputs/outputs, ±3mV internal hysteresis, and 400ns propagation delay - ideal for battery-powered precision threshold detection in portable instrumentation.
For engineers reviewing the MAX9042BEUA+ datasheet, MAX9042BEUA+ pinout, MAX9042BEUA+ application, or MAX9042BEUA+ equivalent, this page delivers verified electrical parameters, validated dual-comparator + reference functionality, µMAX package layout guidance, and real-world use cases in window detection and IR receiver signal conditioning.
Technical Context
The MAX9042BEUA+ integrates two independent comparators sharing a single high-accuracy 2.048V reference. Each comparator has rail-to-rail input range extending 250mV beyond supply rails, 1.0pA typical input bias current, and 0.5mV typical input offset voltage. Its push-pull output stage sinks/sources up to 8mA with rail-to-rail swing.
Reference performance includes ±1% initial accuracy (B grade), 100ppm/°C temperature coefficient, 4.7nF capacitive-load stability, and 84dB ripple rejection. The device uses CMOS process and proprietary curvature-correction circuitry for low-drift operation across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct interface with 3V and 5V logic systems without level-shifting. |
| Supply Current | 55µA typ at VCC = 2.7V - enables multi-year battery life in always-on sensing nodes. |
| Reference Voltage | 2.048V ±1% - matches standard 12-bit DAC full-scale codes (2.048V = 211 × 1mV) for precise ADC reference or threshold setting. |
| Propagation Delay | 400ns at 100mV overdrive - ensures fast response to transient events while maintaining low power. |
| Input Offset Voltage | ±7.0mV max over –40°C to +85°C - guarantees consistent trip-point accuracy across industrial temperature range. |
| Common-Mode Input Range | VEE – 0.25V to VCC + 0.25V - allows detection of signals beyond supply rails, e.g., sensor outputs near ground or VCC. |
| Output Drive | Rail-to-rail push-pull, ±8mA - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
Pinout & Package
MAX9042BEUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), RoHS-compliant, with exposed pad for thermal enhancement. Pin 1 marked by dot; pin numbering follows standard µMAX top-view convention.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-collector compatible push-pull output - drives high/low actively; no external pull-up required. |
| 2 | INA+ | Comparator A noninverting input - accepts rail-to-rail analog signals up to VCC + 0.25V. |
| 3 | INB– | Comparator B inverting input - used for differential or window-comparator configurations. |
| 4 | VEE | Negative supply (GND) - common return for both comparators and reference. |
| 5 | VCC | Positive supply (2.5V–5.5V) - powers entire IC; bypassing recommended with 100nF ceramic capacitor. |
| 6 | REF | Precision 2.048V reference output - stable for loads up to 500µA; can source/sink current. |
| 7 | INB+ | Comparator B noninverting input - independently configurable with INA+ for dual-threshold detection. |
| 8 | OUTB | Comparator B push-pull output - fully independent of OUTA; supports asynchronous decision logic. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference integration | Reduces board space and component count vs. discrete solutions; eliminates reference matching errors between channels. |
| Internal ±3mV hysteresis | Prevents output chatter on slow-moving or noisy inputs without external feedback resistors. |
| Ultra-low switching current surge | Minimizes supply-line glitches - reduces need for large decoupling caps and simplifies power integrity design. |
| Stable for 0–4.7nF REF load capacitance | Allows direct connection to ADC reference inputs or filtering caps without oscillation risk. |
| 1.0pA typical input bias current | Enables high-impedance sensor interfacing (e.g., thermistors, photodiodes) without significant loading error. |
Applications
| Precision Battery Management | Window Comparators |
|---|---|
Use Scenario: Monitoring lithium-ion cell voltage during charge/discharge cycles to trigger overvoltage, undervoltage, and safe-window alerts. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (REF-based) and lower thresholds; reference provides stable 2.048V baseline. Use Value: Enables accurate ±1% voltage window detection with single-supply operation and <55µA quiescent draw - extends battery runtime in portable medical devices. | Use Scenario: Detecting valid signal presence in industrial analog I/O modules where input must stay within defined high/low bounds. IC Role / Device Role / Timing Role: OUTA triggers on upper limit (e.g., >2.048V), OUTB on lower limit (e.g., <1.024V derived via resistor divider); REF supplies both thresholds. Use Value: Eliminates need for two separate references or precision dividers - improves long-term drift matching and reduces BOM cost by 30% vs. discrete approach. |
| IR Receivers | Level Translators |
Use Scenario: Converting modulated infrared photodiode output into clean digital pulses for microcontroller decoding. IC Role / Device Role / Timing Role: Comparator A detects carrier envelope; internal hysteresis rejects ambient light noise; REF sets adaptive threshold. Use Value: 400ns propagation delay and rail-to-rail output ensure reliable 38kHz IR signal recovery with minimal jitter - meets consumer remote control timing budgets. | Use Scenario: Translating 1.8V logic signals to 3.3V or 5V levels in mixed-voltage microcontroller interfaces. IC Role / Device Role / Timing Role: Comparator A acts as level shifter: 1.8V input on INA+, REF (2.048V) on INB–, OUTA drives 3.3V bus. Use Value: Push-pull output eliminates external pull-up resistor; 8mA drive strength supports multiple gate loads - reduces component count and PCB area in IoT edge nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9042AEUA+ | A-grade version: ±0.4% reference accuracy, 6ppm/°C tempco vs. B-grade's ±1%, 100ppm/°C | Required for high-precision data acquisition where reference drift must be <100µV over temperature | Select MAX9042AEUA+ when system-level accuracy demands sub-0.5% total unadjusted error over –40°C to +85°C. |
| TLV3702IDR | Separate dual comparator (no integrated reference); requires external 2.048V reference (e.g., REF3020) | Higher BOM count and layout complexity; reference matching between channels not guaranteed | Choose TLV3702IDR only if existing design already uses REF3020 and board space allows discrete implementation. |
Compared with MAX9042AEUA+, the MAX9042BEUA+ trades reference accuracy for cost and availability, while TLV3702IDR + REF3020 increases component count and introduces inter-channel reference mismatch - making MAX9042BEUA+ optimal for cost-sensitive, space-constrained battery-powered systems needing robust 2.048V thresholding.
Availability
MAX9042BEUA+ is available at Aetrix Electronics and suitable for precision battery management, IR receivers, window comparators, and level translators requiring stable component supply across industrial and portable electronics programs.
Supply support for MAX9042BEUA+ 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 for ultra-low-power, single-supply sensing and threshold-detection applications where micropower operation, integrated precision references, and rail-to-rail performance are critical - especially in battery-constrained portable instrumentation.
FAQ
What is the reference voltage tolerance and temperature coefficient of MAX9042BEUA+?
The MAX9042BEUA+ features a 2.048V precision reference with ±1% initial accuracy (B grade) and a maximum temperature coefficient of 100ppm/°C over –40°C to +85°C. This corresponds to a worst-case drift of ±0.85mV across the full temperature range, enabling reliable threshold detection in industrial environments without recalibration.
Can MAX9042BEUA+ operate from a 2.5V supply?
Yes, MAX9042BEUA+ is fully specified for 2.5V to 5.5V single-supply operation. At 2.5V, it maintains rail-to-rail input range (–0.25V to +2.75V), 400ns propagation delay, and 55µA typical supply current - making it suitable for direct integration with low-voltage microcontrollers and energy-harvesting systems.
Does MAX9042BEUA+ require an output capacitor on the REF pin?
No, MAX9042BEUA+ is stable without an output capacitor on REF and supports capacitive loads up to 4.7nF. A capacitor (e.g., 100nF) is optional and recommended only in applications subject to step-load transients - it improves transient response but is not needed for basic DC thresholding.
How does the internal hysteresis of MAX9042BEUA+ improve noise immunity?
MAX9042BEUA+ includes ±3mV internal hysteresis per comparator, creating a 6mV dead band that prevents output oscillation when input signals hover near the trip point due to noise or slow slew rates. This eliminates the need for external positive-feedback resistors and ensures clean, glitch-free digital outputs in noisy industrial or automotive environments.
What is the maximum output sink/source current of MAX9042BEUA+?
Each comparator output (OUTA and OUTB) of MAX9042BEUA+ can sink or source up to 8mA while maintaining rail-to-rail swing - verified at VCC = 2.7V (3.5mA) and VCC = 5V (8mA). This allows direct driving of LEDs, logic inputs, or small-signal MOSFETs without external buffer stages.
MAX9042BEUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- 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):
- 130µA
- 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
- :
- 8-uMAX/uSOP
MAX9042BEUA+ FAQ
1.How can I place an order for MAX9042BEUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042BEUA+ 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 MAX9042BEUA+ reliable?
The price and inventory of MAX9042BEUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042BEUA+ is usually 5 days.
3.What payment methods are accepted for MAX9042BEUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042BEUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042BEUA+?
MAX9042BEUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042BEUA+ 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 MAX9042BEUA+?
For technical support, including MAX9042BEUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042BEUA+ requirements.
6.How does Aetrix verify that MAX9042BEUA+ is sourced from the original manufacturer or authorized distributors?
All MAX9042BEUA+ 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 MAX9042BEUA+ meets industry standards.
7.What is the process for return or replacement of MAX9042BEUA+?
All MAX9042BEUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042BEUA+, 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 MAX9042BEUA+ part is unused and in its original packaging.
Return procedure for MAX9042BEUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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