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Analog Devices Inc./Maxim Integrated MAX9042AEUA+
- Part No.:
- MAX9042AEUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9042AEUA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
MAX9042AEUA+ from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference, designed for single-supply operation from 2.5V to 5.5V. It delivers rail-to-rail inputs/outputs, 400ns propagation delay, ±3mV internal hysteresis, and only 55µA supply current - ideal for battery-powered precision level detection in portable instrumentation.
For engineers reviewing the MAX9042AEUA+ datasheet, MAX9042AEUA+ pinout, MAX9042AEUA+ application, or MAX9042AEUA+ equivalent, key selection criteria include its dual-comparator + reference integration, A-grade (±0.4% initial accuracy, 6ppm/°C tempco) reference stability, µMAX-8 package footprint, and rail-to-rail push-pull output capability driving ±8mA.
Technical Context
The MAX9042AEUA+ integrates two independent comparators sharing one high-accuracy series-mode voltage reference. Its input stage supports common-mode voltages from VEE − 0.25V to VCC + 0.25V, with typical input bias current of 1.0pA and offset voltage of ±0.5mV. Internal hysteresis ensures robust switching against noise on slow-moving signals.
The output stage uses a low-glitch push-pull design that limits supply current surges during transitions - reducing need for large bypass capacitors. The 2.048V reference features laser-trimmed thin-film resistors and curvature correction, delivering stable performance across 0–4.7nF capacitive loads and ±500µA sourcing/sinking capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - enables direct use in 3V and 5V systems without level-shifting. |
| Supply Current (ICC) | 55µA typ at 5V - extends battery life in always-on sensing applications. |
| Reference Voltage (VREF) | 2.048V ±0.4% (A grade) - matches standard DAC/ADC reference points for accurate thresholding. |
| Propagation Delay (tPD) | 400ns at 100mV overdrive - supports fast response in window-comparator or timing-critical detection. |
| Input Offset Voltage (VOS) | ±0.5mV typ - minimizes false triggering in low-differential-signal monitoring. |
| Rail-to-Rail Output Drive | Sinks/sources up to 8mA - directly interfaces with logic inputs, LEDs, or small MOSFET gates without external buffers. |
| Reference Tempco | 6ppm/°C typ - maintains <±2mV drift over −40°C to +85°C, critical for field-deployed sensors. |
Pinout & Package
The MAX9042AEUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), RoHS-compliant and lead-free. Pinout is identical to industry-standard 8-pin SO but with smaller footprint and thermal characteristics optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A Output | Rail-to-rail push-pull output; drives logic or small loads directly. |
| 2 (INA+) | Comparator A Noninverting Input | Accepts signals up to VEE − 0.25V / VCC + 0.25V; 1.0pA bias current preserves high-impedance sources. |
| 3 (INB−) | Comparator B Inverting Input | Independent input node; supports differential or single-ended configurations per comparator. |
| 4 (VEE) | Negative Supply | Ground reference for single-supply operation; also serves as return path for REF load current. |
| 5 (VCC) | Positive Supply | 2.5V–5.5V input; powers both comparators and reference with shared 55µA quiescent draw. |
| 6 (REF) | Precision Reference Output | 2.048V ±0.4%, stable into 4.7nF; can source/sink ±500µA for external biasing or ADC reference. |
| 7 (INB+) | Comparator B Noninverting Input | Matches INA+ specs; enables independent signal conditioning for dual-threshold detection. |
| 8 (OUTB) | Comparator B Output | Independent push-pull output; allows simultaneous high/low window detection without external logic. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + precision reference | Reduces component count and board area vs. discrete comparator + external reference solutions. |
| A-grade reference accuracy | ±0.4% initial tolerance and 6ppm/°C tempco enable calibration-free designs in medical and industrial sensors. |
| Rail-to-rail I/O with 250mV beyond rails | Allows direct interfacing with sensors operating near supply rails (e.g., thermocouples, current shunts). |
| Low-glitch output switching | Minimizes supply-line disturbances - eliminates need for dedicated comparator supply filtering in mixed-signal systems. |
| Stable into 4.7nF capacitive load | Permits direct connection to ADC reference inputs or RC filters without oscillation risk. |
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: Dual comparator compares cell voltage against upper/lower thresholds derived from 2.048V reference. Use Value: 55µA total supply current enables continuous monitoring without depleting backup batteries; ±0.4% reference ensures <10mV absolute threshold error. | Use Scenario: Detecting valid signal presence in analog sensor outputs (e.g., pressure transducers) by bounding amplitude between high/low limits. IC Role / Device Role / Timing Role: OUTA and OUTB drive separate logic lines indicating IN > VHI and IN < VLO; REF sets both thresholds. Use Value: Integrated dual comparators eliminate timing skew between upper/lower trip points, improving detection reliability in noisy environments. |
| 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 while preserving pulse fidelity. Use Value: 400ns propagation delay supports >1MHz carrier frequencies; rail-to-rail output directly drives 3.3V logic inputs. | Use Scenario: Translating 5V logic signals to 3.3V or 1.8V domains in mixed-voltage microcontroller interfaces. IC Role / Device Role / Timing Role: Comparator A compares input against REF-derived threshold; push-pull output swings rail-to-rail at target VCC. Use Value: Eliminates need for external pull-up resistors or level-shifter ICs; 8mA drive strength supports fan-out to multiple loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9042BEUA+ | B-grade reference: ±1% initial accuracy, 100ppm/°C tempco vs. A-grade's ±0.4%/6ppm/°C | Lower-cost option where <±5mV threshold drift over temperature is acceptable | Select MAX9042BEUA+ for cost-sensitive consumer devices with relaxed accuracy requirements. |
| TLV3702IDR | No integrated reference; requires external 2.048V source; higher 80µA supply current; 1.5µs propagation delay | Requires additional components and PCB area; less suitable for ultra-low-power or space-constrained designs | Choose TLV3702IDR only when existing designs already use external references or require different supply voltage ranges. |
Compared with MAX9042BEUA+, the MAX9042AEUA+ provides tighter reference accuracy and lower temperature drift - critical for calibrated measurement systems. Versus TLV3702IDR, it reduces bill-of-materials count and power consumption while enabling faster, more deterministic threshold detection.
Availability
MAX9042AEUA+ is available at Aetrix Electronics and suitable for precision battery management, window comparator circuits, IR receivers, and level translation applications requiring stable component supply and guaranteed long-term availability.
Supply support for MAX9042AEUA+ 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 engineered for ultra-low-power, space-constrained sensing and monitoring systems - integrating precision references with micropower comparators to replace discrete solutions in portable and battery-operated equipment.
FAQ
What is the reference voltage accuracy and temperature coefficient of the MAX9042AEUA+?
The MAX9042AEUA+ features an A-grade 2.048V precision voltage reference with ±0.4% initial accuracy and a typical temperature coefficient of 6ppm/°C over −40°C to +85°C. This specification is guaranteed across the full operating temperature range and enables high-accuracy threshold generation without external calibration in the MAX9042AEUA+.
Does the MAX9042AEUA+ support rail-to-rail input and output operation?
Yes, the MAX9042AEUA+ supports rail-to-rail input operation with a common-mode range extending 250mV beyond both supply rails (VEE − 0.25V to VCC + 0.25V), and rail-to-rail push-pull output stages capable of sinking and sourcing up to 8mA. This allows direct interfacing with sensors and logic families across its 2.5V–5.5V supply range.
What is the supply current consumption of the MAX9042AEUA+ at different supply voltages?
The MAX9042AEUA+ draws 55µA typical supply current at VCC = 5V and 55µA typical at VCC = 2.7V, as specified in the A-grade electrical characteristics table. This ultra-low quiescent current remains stable across temperature and switching frequency, making the MAX9042AEUA+ ideal for always-on battery-powered applications.
Can the MAX9042AEUA+ drive capacitive loads on its REF pin?
Yes, the MAX9042AEUA+ reference output is stable with capacitive loads up to 4.7nF, eliminating the need for external compensation. This allows direct connection to ADC reference inputs or RC filtering networks without risk of oscillation - a verified design feature confirmed in the MAX9042AEUA+ datasheet's "Capacitive-Load Stability Range" parameter.
What package type and pin count does the MAX9042AEUA+ use?
The MAX9042AEUA+ is supplied in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), RoHS-compliant and lead-free. Its pinout matches standard 8-pin SO footprints mechanically but offers superior thermal performance and reduced PCB area - a key advantage for compact portable electronics using the MAX9042AEUA+.
MAX9042AEUA+ 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
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 1pA @ 5V
- Current - Input Bias (Max):
- 8mA
- Current - Output (Typ):
- 85µA
- 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
MAX9042AEUA+ FAQ
1.How can I place an order for MAX9042AEUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042AEUA+ 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 MAX9042AEUA+ reliable?
The price and inventory of MAX9042AEUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042AEUA+ is usually 5 days.
3.What payment methods are accepted for MAX9042AEUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042AEUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042AEUA+?
MAX9042AEUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042AEUA+ 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 MAX9042AEUA+?
For technical support, including MAX9042AEUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042AEUA+ requirements.
6.How does Aetrix verify that MAX9042AEUA+ is sourced from the original manufacturer or authorized distributors?
All MAX9042AEUA+ 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 MAX9042AEUA+ meets industry standards.
7.What is the process for return or replacement of MAX9042AEUA+?
All MAX9042AEUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042AEUA+, 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 MAX9042AEUA+ part is unused and in its original packaging.
Return procedure for MAX9042AEUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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