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Analog Devices Inc./Maxim Integrated MAX9042AEUA+T
- Part No.:
- MAX9042AEUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9042AEUA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,616
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Product details
Overview
MAX9042AEUA+T from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference, operating from 2.5V to 5.5V supply. 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 and sensor interfaces.
For engineers reviewing the MAX9042AEUA+T datasheet, MAX9042AEUA+T pinout, MAX9042AEUA+T application, or MAX9042AEUA+T equivalent, key selection criteria include its A-grade reference accuracy (±0.4% initial, 6ppm/°C tempco), dual-comparator architecture with uncommitted IN− pins, push-pull outputs sourcing/sinking 8mA, and µMAX-8 package compatibility with space-constrained designs.
Technical Context
The MAX9042AEUA+T integrates two independent comparators sharing one high-stability 2.048V reference. Each comparator features rail-to-rail input range extending 250mV beyond supply rails and input bias current of 1.0pA (typ). Its proprietary output stage minimizes supply current surges during switching, eliminating typical supply glitches.
Reference performance is enabled by curvature-correction circuitry and laser-trimmed thin-film resistors, supporting stable operation with capacitive loads up to 4.7nF. The device operates across −40°C to +85°C and is specified for A-grade accuracy: ±0.4% initial tolerance and 6ppm/°C temperature coefficient over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V single supply - supports both 3V and 5V systems without level-shifting. |
| Supply Current | 55µA (typ) at VCC = 2.7V - enables multi-year battery life in always-on sensing nodes. |
| Propagation Delay | 400ns (100mV overdrive, CL = 15pF) - suitable for medium-speed window detection and timing-critical thresholds. |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC full-scale and ADC reference requirements. |
| Input Offset Voltage | ±0.5mV (typ) - ensures accurate low-level signal discrimination below 10mV differential. |
| Output Drive | Rail-to-rail push-pull, ±8mA - directly drives logic inputs, LEDs, or small MOSFET gates without external buffers. |
| Common-Mode Range | VEE − 0.25V to VCC + 0.25V - allows detection of signals beyond supply rails, e.g., sensor offsets. |
Pinout & Package
The MAX9042AEUA+T is housed in an 8-pin µMAX package (pin-compatible with SO-8 but 30% smaller footprint), RoHS-compliant, with exposed pad for thermal enhancement.
| 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 | Uncommitted input - configurable as threshold reference or feedback node for hysteresis. |
| 3 (INA+) | Comparator A noninverting input | High-impedance (1.0pA bias) input accepting signals from VEE − 0.25V to VCC + 0.25V. |
| 4 (VEE) | Negative supply | Ground reference for single-supply operation; also serves as return path for REF load current. |
| 5 (REF) | Precision reference output | Stable 2.048V source with 6ppm/°C tempco; sinks or sources up to 500µA with <4.7nF load stability. |
| 6 (VCC) | Positive supply | 2.5V–5.5V input; powers both comparators and reference; bypassing optional due to low dynamic current surge. |
| 7 (INB+) | Comparator B noninverting input | Independent high-Z input identical to INA+; enables dual-threshold or window comparator topologies. |
| 8 (OUTB) | Comparator B output | Second push-pull output, fully independent of OUTA - supports simultaneous dual-level decisions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference integration | Reduces board area and component count vs. discrete solutions; eliminates inter-device matching drift. |
| A-grade reference accuracy | ±0.4% initial error and 6ppm/°C tempco enable direct use in 12-bit data acquisition without calibration. |
| Rail-to-rail I/O with extended CMVR | Input range extends 250mV beyond rails - supports detection of overvoltage/undervoltage conditions in fault monitoring. |
| Glitch-free switching output stage | Minimizes supply current transients during output transitions - reduces need for bulk bypass capacitors in compact layouts. |
| Low quiescent current | 55µA total (both comparators + reference) - extends battery life in IoT endpoint sensors and wearables. |
Applications
| Battery Voltage Monitoring | Window Comparator for Sensor Thresholds |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger under-voltage lockout and over-voltage protection. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against 2.048V reference-derived thresholds (e.g., 2.8V and 4.2V via resistor dividers) to generate independent UVLO/OVP flags. Use Value: Eliminates need for external reference and two discrete comparators; A-grade reference ensures consistent trip points across temperature and lifetime. | Use Scenario: Detecting whether a pressure sensor output falls within acceptable operational bounds (e.g., 1.5V–3.0V) before enabling downstream processing. IC Role / Device Role / Timing Role: One comparator monitors upper bound (INB+ tied to divider), the other lower bound (INA+ tied to divider); REF supplies both thresholds. Use Value: Single IC implements full window function with matched reference and timing (400ns delay), avoiding inter-channel skew in safety-critical systems. |
| IR Receiver Signal Conditioning | Digital Line Receiver with Level Translation |
Use Scenario: Converting weak, noisy IR photodiode signals into clean digital pulses for microcontroller decoding in remote control receivers. IC Role / Device Role / Timing Role: Comparator A detects rising edge (signal presence), Comparator B adds hysteresis via feedback to reject noise; REF sets precise detection threshold. Use Value: Internal ±3mV hysteresis and 1.0pA input bias prevent false triggering from EMI or slow photodiode decay; rail-to-rail output directly interfaces 3.3V logic. | Use Scenario: Receiving 5V-tolerant digital signals (e.g., RS-232 or industrial bus) into a 3.3V microcontroller I/O port. IC Role / Device Role / Timing Role: Comparator A compares incoming signal to REF-based threshold (e.g., 1.5V), generating 3.3V-compatible logic output; REF provides stable mid-rail reference. Use Value: Push-pull output eliminates external pull-up, and 400ns delay ensures reliable sampling at >1MHz data rates without metastability. |
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); otherwise identical pinout, specs, and package. | Suitable for cost-sensitive applications where 12-bit accuracy is not required (e.g., basic power sequencing). | Select MAX9042BEUA when reference stability over temperature is less critical and budget constraints dominate. |
| TLV3702IDR | Single-supply dual comparator only (no integrated reference); requires external 2.048V reference; higher supply current (80µA). | Used where reference flexibility is needed (e.g., adjustable thresholds) or where existing system reference can be shared. | Choose TLV3702IDR if board already includes a precision reference or if independent reference scaling is required per channel. |
Compared with MAX9042BEUA, the MAX9042AEUA+T offers tighter reference accuracy and lower tempco for measurement-critical roles; versus TLV3702IDR, it reduces BOM count and layout area by integrating the reference, albeit with fixed 2.048V output.
Availability
MAX9042AEUA+T is available at Aetrix Electronics and suitable for battery management systems, sensor interface modules, industrial monitoring equipment, and portable medical devices requiring stable component supply across long production lifecycles.
Supply support for MAX9042AEUA+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–MAX9043/MAX9050–MAX9053 product line delivers micropower, single-supply comparator-plus-reference ICs optimized for precision threshold detection in space- and energy-constrained applications.
FAQ
What is the reference voltage accuracy and temperature coefficient of the MAX9042AEUA+T?
The MAX9042AEUA+T features an A-grade 2.048V precision 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 direct use in 12-bit data acquisition without calibration. The reference remains stable with capacitive loads up to 4.7nF.
Does the MAX9042AEUA+T support rail-to-rail input and output operation?
Yes, the MAX9042AEUA+T supports true rail-to-rail input common-mode range from VEE − 0.25V to VCC + 0.25V and rail-to-rail push-pull output swing. Its outputs can source and sink up to 8mA while maintaining logic-compatible voltage levels - for example, VOL ≤ 0.55V at 8mA sink (VCC = 5V) and VOH ≥ 4.45V at 8mA source. This eliminates need for external level-shifting circuitry.
What is the supply current consumption of the MAX9042AEUA+T at different supply voltages?
The MAX9042AEUA+T draws 55µA (typical) at VCC = 2.7V and 60µA (typical) at VCC = 5V, per the A-grade electrical characteristics table. This ultra-low quiescent current remains stable across temperature and switching frequency - increasing only marginally (to ~80µA) even at 100kHz output toggling - making it ideal for always-on battery-powered applications.
How is hysteresis implemented in the MAX9042AEUA+T, and can it be adjusted?
The MAX9042AEUA+T includes fixed internal hysteresis of ±3mV to ensure clean switching with slow-moving or noisy inputs. Additional hysteresis can be added externally using positive feedback resistors between OUT and IN−, as detailed in the datasheet's Applications Information section. The uncommitted IN− pins on both comparators simplify this configuration without requiring additional components.
What package type and pin count does the MAX9042AEUA+T use, and is it RoHS-compliant?
The MAX9042AEUA+T uses an 8-pin µMAX package (also known as FMAX), measuring 3mm × 3mm with exposed thermal pad. It is RoHS-compliant and lead(Pb)-free, indicated by the "+T" suffix. The pinout is fully documented in the datasheet and supports drop-in replacement for SO-8 footprints with area reduction benefits.
MAX9042AEUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX9042AEUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9042AEUA+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 MAX9042AEUA+T reliable?
The price and inventory of MAX9042AEUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9042AEUA+T is usually 5 days.
3.What payment methods are accepted for MAX9042AEUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9042AEUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9042AEUA+T?
MAX9042AEUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9042AEUA+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 MAX9042AEUA+T?
For technical support, including MAX9042AEUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9042AEUA+T requirements.
6.How does Aetrix verify that MAX9042AEUA+T is sourced from the original manufacturer or authorized distributors?
All MAX9042AEUA+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 MAX9042AEUA+T meets industry standards.
7.What is the process for return or replacement of MAX9042AEUA+T?
All MAX9042AEUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9042AEUA+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 MAX9042AEUA+T part is unused and in its original packaging.
Return procedure for MAX9042AEUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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