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Analog Devices Inc./Maxim Integrated MAX9042AESA+T
- Part No.:
- MAX9042AESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9042AESA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,794
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Product details
Overview
MAX9042AESA+T 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 low-power battery management and window detection circuits.
For engineers reviewing the MAX9042AESA+T datasheet, MAX9042AESA+T pinout, MAX9042AESA+T application, or MAX9042AESA+T equivalent, key selection criteria include dual-comparator functionality with shared reference, A-grade (±0.4% initial accuracy, 6ppm/°C tempco), rail-to-rail output drive (±8mA), and SO-8 compatibility for industrial sensor interfaces and precision level translation.
Technical Context
The MAX9042AESA+T integrates two independent comparators sharing a single high-accuracy 2.048V 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 noise-immune switching even with slow input signals.
The output stage uses a push-pull design delivering rail-to-rail swing and ±8mA drive capability, while minimizing supply current surges during transitions - reducing need for large bypass capacitors. The reference employs curvature correction and laser-trimmed thin-film resistors, stable up to 4.7nF capacitive load and specified over −40°C to +85°C.
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 VCC = 2.7V - enables multi-year operation on coin-cell batteries. |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC full-scale for precise thresholding. |
| Propagation Delay | 400ns at 100mV overdrive - sufficient for kHz-range signal monitoring and window detection. |
| Input Offset Voltage | ±0.5mV typical - enables accurate comparison of mV-level sensor signals. |
| Output Drive | Rail-to-rail, ±8mA - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
| Tempco | 6ppm/°C typical - drift < ±0.5mV over −40°C to +85°C, critical for outdoor instrumentation. |
Pinout & Package
MAX9042AESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27mm pitch and surface-mount footprint per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Comparator A Output | Push-pull, rail-to-rail output capable of sourcing/sinking 8mA. |
| 2 (INA−) | Comparator A Inverting Input | Uncommitted input; accepts signals beyond rails (VEE − 0.25V to VCC + 0.25V). |
| 3 (INA+) | Comparator A Noninverting Input | Uncommitted input; same wide common-mode range as INA−. |
| 4 (VEE) | Negative Supply | Ground reference for single-supply operation; connects to system GND. |
| 5 (REF) | Voltage Reference Output | Stable 2.048V source, ±0.4% accuracy, drives up to 500µA load. |
| 6 (INB−) | Comparator B Inverting Input | Uncommitted input; independent of INA−, supports dual-threshold configurations. |
| 7 (INB+) | Comparator B Noninverting Input | Uncommitted input; enables independent second comparison channel. |
| 8 (VCC) | Positive Supply | Accepts 2.5V–5.5V; powers both comparators and reference simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparators + precision reference | Reduces BOM count and PCB area vs. discrete comparator + external reference solutions. |
| ±3mV internal hysteresis | Eliminates need for external positive feedback resistors in noisy environments. |
| 400ns propagation delay at low current | Enables real-time response in battery-powered data loggers without sacrificing efficiency. |
| Rail-to-rail I/O with 8mA drive | Directly interfaces with 1.8V/3.3V/5V logic families and small actuators. |
| Stable with 0–4.7nF REF load capacitance | Allows local filtering or transient suppression without oscillation risk. |
Applications
| Battery Voltage Monitoring | Window Comparator |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage across 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 2.048V reference via resistor dividers. Use Value: 55µA quiescent current extends device runtime; ±0.4% reference accuracy ensures reliable overvoltage/undervoltage shutdown. | Use Scenario: Detecting valid signal amplitude in IR receiver front-ends for remote control systems. IC Role / Device Role / Timing Role: One comparator detects signal presence above noise floor; second validates amplitude within defined band using same reference. Use Value: Integrated dual channels eliminate timing skew between thresholds; rail-to-rail outputs interface directly with microcontroller GPIO. |
| Industrial Sensor Interface | Level Translation |
Use Scenario: Converting analog output from 4–20mA current-loop sensors into digital alerts for PLC input modules. IC Role / Device Role / Timing Role: Comparator A triggers high-limit alarm; Comparator B triggers low-limit alarm, both referenced to 2.048V scaled by precision resistors. Use Value: 6ppm/°C tempco maintains threshold stability across factory temperature swings; SO-8 package suits automated assembly. | Use Scenario: Translating 5V logic signals to 3.3V microcontroller inputs in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Uses open-drain-like behavior of push-pull output (with external pull-up) or direct rail-to-rail drive to match target logic levels. Use Value: 400ns delay ensures timing compliance in 1MHz control loops; ±8mA drive supports multiple gate loads without buffer ICs. |
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 | A-grade replaced with B-grade: ±1% initial accuracy, 100ppm/°C tempco. | Lower-cost option where ±1% threshold tolerance is acceptable (e.g., non-critical power sequencing). | Select when cost sensitivity outweighs precision requirements; same pinout and SO-8 footprint not applicable - µMAX package requires layout change. |
| TLV3702IDR | No integrated reference; dual comparator only, 800nA supply current, 360µs propagation delay. | Requires external reference (e.g., REF3020) and increases component count; suited for ultra-low-power sleep-mode wake-up. | Choose only if reference independence is required; no pin compatibility - different pin assignment and no REF pin. |
Compared with MAX9042BEUA and TLV3702IDR, the MAX9042AESA+T delivers superior accuracy and thermal stability in a standard SO-8 package, enabling drop-in replacement in precision thresholding designs without compromising supply current or speed.
Availability
MAX9042AESA+T is available at Aetrix Electronics and suitable for battery management systems, industrial sensor interfaces, IR receivers, and precision level translators requiring stable component supply across extended temperature ranges.
Supply support for MAX9042AESA+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 for micropower, single-supply applications demanding precision voltage references and low-noise comparators in space-constrained systems.
FAQ
What is the reference voltage accuracy and temperature coefficient of MAX9042AESA+T?
The MAX9042AESA+T features an A-grade 2.048V reference with ±0.4% initial accuracy and 6ppm/°C typical temperature coefficient over −40°C to +85°C. This specification is guaranteed by design and confirmed in the Electrical Characteristics table for A-grade devices, ensuring stable thresholds in precision instrumentation and battery monitoring applications.
Does MAX9042AESA+T support rail-to-rail input and output operation?
Yes, the MAX9042AESA+T 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 outputs capable of sourcing and sinking up to 8mA. These characteristics are explicitly verified in the datasheet's Electrical Characteristics and Functional Diagram sections.
What is the maximum capacitive load the REF pin can drive while maintaining stability?
The REF pin of MAX9042AESA+T is stable with capacitive loads from 0 to 4.7nF, as confirmed in the "Capacitive-Load Stability Range" parameter (CL(VREF)) under Electrical Characteristics. This allows use of local decoupling or filtering capacitors without risk of oscillation - a key advantage over references requiring minimum load capacitance.
Can MAX9042AESA+T operate from a 2.7V supply?
Yes, MAX9042AESA+T operates from 2.5V to 5.5V, fully functional at 2.7V. Supply current remains 55µA typical at 2.7V (per Electrical Characteristics table), and all specifications including propagation delay (400ns), input offset (±0.5mV), and output drive (±8mA) are validated across this range.
How does the internal hysteresis of MAX9042AESA+T improve noise immunity?
The MAX9042AESA+T includes ±3mV internal hysteresis, which creates a 6mV dead-band between rising and falling trip points. This prevents output chatter caused by input noise near the threshold - eliminating need for external hysteresis resistors in most applications, as confirmed in the Features and Applications Information sections of the datasheet.
MAX9042AESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC
MAX9042AESA+T FAQ
1.How can I place an order for MAX9042AESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042AESA+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 MAX9042AESA+T reliable?
The price and inventory of MAX9042AESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042AESA+T is usually 5 days.
3.What payment methods are accepted for MAX9042AESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042AESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042AESA+T?
MAX9042AESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042AESA+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 MAX9042AESA+T?
For technical support, including MAX9042AESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042AESA+T requirements.
6.How does Aetrix verify that MAX9042AESA+T is sourced from the original manufacturer or authorized distributors?
All MAX9042AESA+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 MAX9042AESA+T meets industry standards.
7.What is the process for return or replacement of MAX9042AESA+T?
All MAX9042AESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042AESA+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 MAX9042AESA+T part is unused and in its original packaging.
Return procedure for MAX9042AESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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