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Analog Devices Inc./Maxim Integrated MAX9042AESA+
- Part No.:
- MAX9042AESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX9042AESA+.pdf
- Description:
- IC COMPARATOR DUAL 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,294
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Product details
Overview
MAX9042AESA+ from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference in an 8-pin SO 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 MAX9042AESA+ datasheet, MAX9042AESA+ pinout, MAX9042AESA+ application, or MAX9042AESA+ equivalent, key selection criteria include dual-comparator timing consistency, reference accuracy (±0.4% A-grade), low quiescent current under dynamic switching, and compatibility with capacitive loads up to 4.7nF on the REF output.
Technical Context
The MAX9042AESA+ integrates two independent comparators sharing a single high-stability 2.048V reference. Each comparator has rail-to-rail input range extending 250mV beyond VEE and VCC, 1.0pA typical input bias current, and ±0.5mV typical input offset voltage. Its push-pull output stage sinks/sources up to 8mA with VOL ≤ 0.55V at 5V/8mA and VOH ≥ 4.45V.
Reference performance includes 6ppm/°C typical temperature coefficient (A grade), ±0.4% initial accuracy, 200µV/V line regulation, and stable operation with 0–4.7nF capacitive loads. Internal hysteresis eliminates oscillation on slow signals, and the unique output-stage design minimizes supply-current surges during transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports both 3V and 5V systems without level-shifting. |
| Supply Current | 55µA typical at 5V - enables multi-year battery life in always-on sensing nodes. |
| Propagation Delay | 400ns at 100mV overdrive - ensures fast response for real-time window detection. |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC full-scale for precise ADC reference or threshold setting. |
| Input Offset Voltage | ±0.5mV typical - enables accurate low-level signal discrimination (e.g., <10mV sensor thresholds). |
| Output Drive | Rail-to-rail push-pull, ±8mA - directly interfaces with logic inputs, LEDs, or small MOSFET gates without external buffers. |
| Capacitive Load Stability | 0–4.7nF on REF - allows local decoupling or filtering without instability risk. |
Pinout & Package
MAX9042AESA+ uses an 8-pin SO (Small Outline) package with gull-wing leads, RoHS-compliant, rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A Output | Push-pull rail-to-rail output capable of sourcing/sinking 8mA; no external pull-up required. |
| 2 (INA−) | Comparator A Inverting Input | High-impedance node (1pA bias); common-mode range extends 250mV beyond rails. |
| 3 (INA+) | Comparator A Noninverting Input | Same high-Z, rail-to-rail CMVR as INA−; used for positive-edge threshold detection. |
| 4 (VEE) | Negative Supply | Ground reference for single-supply operation; must be connected to system GND. |
| 5 (REF) | Precision Reference Output | Stable 2.048V source; supplies both comparators; supports up to 500µA load current. |
| 6 (VCC) | Positive Supply | 2.5V–5.5V input; powers comparators and reference; bypassing recommended if supply impedance >1Ω. |
| 7 (INB+) | Comparator B Noninverting Input | Independent input for second comparator; identical specs to INA+. |
| 8 (OUTB) | Comparator B Output | Second independent push-pull output; enables dual-threshold or window-comparator topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparators + precision reference | Reduces board space and BOM count vs. discrete comparator + external reference solutions. |
| 400ns propagation delay at 55µA | Delivers speed comparable to higher-power comparators while maintaining micropower efficiency. |
| ±3mV internal hysteresis | Eliminates need for external positive-feedback resistors in noisy environments or with slow input edges. |
| 2.048V reference with 6ppm/°C tempco | Enables 12-bit system accuracy across industrial temperature range without calibration. |
| Rail-to-rail I/O with 8mA drive | Directly drives CMOS/TTL logic, status LEDs, or low-side switches without interface components. |
Applications
| Battery Voltage Monitoring | Window Comparator |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (4.2V) and lower (3.0V) thresholds derived from REF via resistor dividers. Use Value: 55µA total supply current extends battery runtime; 400ns delay ensures rapid fault flag assertion before overvoltage damage occurs. | Use Scenario: Detecting valid signal amplitude in IR receiver front-ends where ambient noise causes false triggers. IC Role / Device Role / Timing Role: One comparator detects signal presence above noise floor; second validates amplitude stays within defined window using REF-based thresholds. Use Value: Integrated 2.048V reference guarantees consistent trip points across temperature; ±3mV hysteresis prevents chatter on marginal signals. |
| Level Translation | Digital Line Receiver |
Use Scenario: Converting 1.8V logic signals to 3.3V domain in mixed-voltage microcontroller interfaces. IC Role / Device Role / Timing Role: Comparator A compares 1.8V input to REF-derived 0.9V threshold; output swings rail-to-rail at 3.3V supply. Use Value: Rail-to-rail output eliminates need for external level-shifter ICs; 400ns delay preserves signal integrity in UART/SPI clock domains. | Use Scenario: Recovering digital data from attenuated, distorted analog lines in industrial fieldbus receivers. IC Role / Device Role / Timing Role: Comparator B performs time-averaged thresholding (using RC network on INB+) while OUTB delivers clean logic output. Use Value: Low input bias current (1pA) prevents RC time-constant drift; stable REF ensures consistent decision threshold despite supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9042BEUA | Same dual-comparator + 2.048V reference architecture, but in 8-pin µMAX package; B-grade reference (±1% initial accuracy, 100ppm/°C tempco). | Lower reference accuracy limits use in 12-bit+ systems; µMAX footprint requires PCB redesign vs. SO. | Select when cost sensitivity outweighs precision requirements and board space permits µMAX layout. |
| TLV3702IDR | Dual comparator only (no integrated reference); requires external 2.048V reference (e.g., REF3020); higher supply current (80µA typical); 1.5µs propagation delay. | Increased component count and layout complexity; slower response limits high-speed window detection. | Select when reference flexibility (e.g., adjustable VREF) or higher drive strength (>20mA) is needed, accepting trade-offs in size and power. |
Compared with MAX9042BEUA, the MAX9042AESA+ provides tighter reference accuracy and lower tempco for precision measurement, while TLV3702IDR offers greater design flexibility at the cost of higher power and slower timing - making MAX9042AESA+ optimal for compact, battery-critical, high-accuracy dual-threshold systems.
Availability
MAX9042AESA+ is available at Aetrix Electronics and suitable for battery management systems, industrial sensor interfaces, portable medical monitors, and IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX9042AESA+ 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 fast, rail-to-rail comparators - targeting portable instrumentation, energy harvesting sensors, and battery-operated control systems.
FAQ
What is the reference voltage accuracy and temperature stability of MAX9042AESA+?
The MAX9042AESA+ features an A-grade 2.048V reference with ±0.4% initial accuracy and a typical temperature coefficient of 6ppm/°C over –40°C to +85°C. This ensures less than ±0.5mV drift across the full industrial temperature range, enabling reliable thresholding in precision analog monitoring circuits without calibration.
Can MAX9042AESA+ drive capacitive loads on its REF pin?
Yes, the MAX9042AESA+ REF output is stable with capacitive loads from 0 to 4.7nF, per the datasheet. This allows direct connection to local decoupling capacitors or RC filters without risk of oscillation - critical for noise-sensitive applications like precision ADC reference buffering or low-noise sensor signal conditioning.
What is the maximum output current capability of MAX9042AESA+ comparators?
Each comparator output in the MAX9042AESA+ can sink and source up to 8mA while maintaining rail-to-rail swing. At VCC = 5V and ISINK = 8mA, VOL is guaranteed ≤ 0.55V; at ISOURCE = 8mA, VOH is ≥ 4.45V - sufficient to directly drive LEDs, logic inputs, or small-signal MOSFET gates without external buffers.
Does MAX9042AESA+ require external hysteresis for noise immunity?
No, the MAX9042AESA+ includes ±3mV internal hysteresis on both comparators, eliminating the need for external positive-feedback resistors in most applications. This built-in hysteresis ensures clean, chatter-free switching even with slow-moving or noisy input signals - simplifying design and reducing component count.
What supply voltage range does MAX9042AESA+ support, and how does it affect performance?
The MAX9042AESA+ operates from 2.5V to 5.5V. Supply current remains stable across this range (55µA typ at 5V, 55µA typ at 2.7V), and propagation delay varies only slightly (400ns at 100mV overdrive). This wide range enables seamless use in both 3V and 5V systems without performance degradation or level-shifting circuitry.
MAX9042AESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- *
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- :
- -
MAX9042AESA+ FAQ
1.How can I place an order for MAX9042AESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042AESA+ 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 MAX9042AESA+ reliable?
The price and inventory of MAX9042AESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042AESA+ is usually 5 days.
3.What payment methods are accepted for MAX9042AESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042AESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042AESA+?
MAX9042AESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042AESA+ 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 MAX9042AESA+?
For technical support, including MAX9042AESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042AESA+ requirements.
6.How does Aetrix verify that MAX9042AESA+ is sourced from the original manufacturer or authorized distributors?
All MAX9042AESA+ 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 MAX9042AESA+ meets industry standards.
7.What is the process for return or replacement of MAX9042AESA+?
All MAX9042AESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042AESA+, 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 MAX9042AESA+ part is unused and in its original packaging.
Return procedure for MAX9042AESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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