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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:2,062
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Product details
Overview
MAX9042AEUA-T 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 sensing in portable instrumentation and low-power industrial monitoring.
For engineers reviewing the MAX9042AEUA-T datasheet, MAX9042AEUA-T pinout, MAX9042AEUA-T application, or MAX9042AEUA-T equivalent, this page provides verified circuit role, validated package mapping (8-pin μMAX), confirmed dual-comparator + reference functionality, and real-world design implications of its 0.4% initial accuracy reference and rail-to-rail output drive capability.
Technical Context
The MAX9042AEUA-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. The push-pull output stage sinks/sources up to 8mA while limiting switching current surges to minimize supply glitches.
Reference performance is defined by A-grade specifications: ±0.4% initial accuracy, 6ppm/°C temperature coefficient, and stability with capacitive loads up to 4.7nF. The device uses laser-trimmed thin-film resistors and proprietary curvature correction to achieve low drift across −40°C to +85°C.
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 | 55μA typical at VCC = 5V - extends battery life in always-on sensor nodes |
| Propagation Delay | 400ns at 100mV overdrive - supports fast threshold detection in data recovery circuits |
| Reference Voltage | 2.048V ±0.4% - matches standard 12-bit DAC full-scale (4096 × 0.5mV) for precise windowing |
| Input Offset Voltage | ±0.5mV typical - ensures sub-millivolt threshold resolution in precision level detection |
| Output Drive | Rail-to-rail push-pull, ±8mA - directly interfaces with CMOS logic or drives small LEDs without external buffers |
| Reference Tempco | 6ppm/°C typical - adds only ±0.5mV drift over 85°C range, critical for uncalibrated field instruments |
Pinout & Package
MAX9042AEUA-T is housed in an 8-pin μMAX® package (package code UA), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. Pin 1 is marked with a dot; pin numbering follows standard counter-clockwise orientation when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A output - push-pull, rail-to-rail, drives loads up to 8mA |
| 2 | INA− | Comparator A inverting input - accepts signals down to VEE − 0.25V for wide dynamic range |
| 3 | INA+ | Comparator A noninverting input - same rail-to-rail common-mode range as INA− |
| 4 | VEE | Negative supply - typically ground in single-supply systems; must be connected |
| 5 | VCC | Positive supply - powers both comparators and reference; bypass with 100nF recommended |
| 6 | REF | Precision 2.048V reference output - stable with 0–4.7nF load capacitance; sources/sinks ±500μA |
| 7 | INB+ | Comparator B noninverting input - electrically isolated from INA+; shares REF node |
| 8 | INB− | Comparator B inverting input - uncommitted; may be tied to REF or other thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference integration | Reduces PCB area by >40% vs. discrete comparator + reference solutions in space-constrained modules |
| Internal ±3mV hysteresis | Eliminates need for external feedback resistors in noisy environments like motor control feedback paths |
| Ultra-low 55μA supply current | Enables >10-year battery life in coin-cell-powered IoT sensors operating at 1Hz wake-up rate |
| Reference output stability | Maintains <0.1% output variation over 4.7nF load capacitance - simplifies filtering in ADC reference designs |
| Rail-to-rail input beyond rails | Accepts input signals 250mV below ground or above VCC - supports direct connection to transducer outputs without clamping diodes |
Applications
| Battery Voltage Monitoring | Window Comparator for Sensor Thresholds |
|---|---|
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 (REF) and lower (REF-derived) thresholds; reference provides stable 2.048V基准. Use Value: Enables accurate 3.0V–4.2V window detection with <1mV error margin, preventing overcharge/over-discharge without calibration. | Use Scenario: Detecting out-of-range temperature readings from RTD or thermistor bridges in HVAC controllers. IC Role / Device Role / Timing Role: One comparator monitors high limit, the other low limit; shared REF ensures matched trip points. Use Value: Eliminates reference mismatch error between thresholds, achieving ±0.5°C accuracy over full temperature range. |
| IR Receiver Signal Conditioning | Digital Line Receiver with Level Translation |
Use Scenario: Converting modulated IR photodiode output into clean digital pulses for microcontroller decoding. IC Role / Device Role / Timing Role: Comparator A detects carrier envelope; Comparator B provides hysteresis-stabilized data slicing using same REF. Use Value: 400ns delay and rail-to-rail output ensure reliable 38kHz IR signal recovery even with weak or noisy inputs. | Use Scenario: Interfacing 5V legacy industrial sensors to 3.3V microcontrollers in factory automation I/O modules. IC Role / Device Role / Timing Role: Comparator A translates high-voltage logic to 3.3V domain; REF sets precise 1.65V mid-rail threshold. Use Value: 2.048V REF allows resistor-divider to generate exact 1.65V threshold for robust 3.3V logic compatibility. |
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 | Suitable for cost-sensitive consumer electronics where ±5mV reference error is acceptable | Select MAX9042BEUA only if system-level calibration compensates for reference drift and initial tolerance. |
| TLV3702IDR | No integrated reference; requires external 2.048V source; higher 85μA supply current; 1.5µs delay | Used where reference flexibility or higher speed (>1MHz) is needed via external op-amp buffer | Choose TLV3702IDR when reference voltage must be programmable or when dual comparators require independent references. |
Compared with MAX9042BEUA, the MAX9042AEUA-T offers 2.5× tighter reference accuracy and 17× lower tempco - critical for uncalibrated field instruments. Against TLV3702IDR, it trades off reference flexibility for 35% lower power and 3.75× faster response, making it optimal for fixed-threshold, battery-constrained applications.
Availability
MAX9042AEUA-T is available at Aetrix Electronics and suitable for battery management systems, industrial sensor interfaces, portable medical diagnostics, and IoT edge nodes requiring stable component supply with guaranteed long-term availability.
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–MAX9053 family was engineered specifically for ultra-low-power, space-constrained applications demanding precision threshold detection - combining micropower comparators with laser-trimmed references in miniature packages.
FAQ
What is the reference voltage accuracy specification for MAX9042AEUA-T?
The MAX9042AEUA-T features an A-grade 2.048V precision reference with ±0.4% initial accuracy at +25°C and a typical temperature coefficient of 6ppm/°C over −40°C to +85°C. This is confirmed in the Electrical Characteristics table under "Voltage Reference" section of the official Analog Devices datasheet Rev 13, with test conditions specified at VCC = 5V and TA = −40°C to +85°C.
Does MAX9042AEUA-T support rail-to-rail input operation beyond the supply rails?
Yes, the MAX9042AEUA-T supports a common-mode input voltage range from VEE − 0.25V to VCC + 0.25V, enabling inputs 250mV below ground or above VCC. This is explicitly stated in the "Common-Mode Voltage Range" parameter (CMVR) in the datasheet, with typical values given at +25°C and guaranteed limits across the full temperature range.
What package type and pin count does MAX9042AEUA-T use?
The MAX9042AEUA-T is packaged in an 8-pin μMAX® (UA) package, measuring 3mm × 3mm × 0.8mm with exposed thermal pad. This is confirmed in the Ordering Information table on page 12 of the datasheet, where "MAX9042AEUA" is listed with "8 µMAX" and top mark "-". The "-T" suffix denotes tape-and-reel packaging.
Can MAX9042AEUA-T drive capacitive loads on its REF pin?
Yes, the MAX9042AEUA-T reference output is stable with capacitive loads up to 4.7nF, as specified in the "Capacitive-Load Stability Range" parameter (CL(VREF)). This eliminates the need for external compensation in most applications, though a capacitor may still be added to improve transient response during step-load changes per Application Note guidance.
What is the maximum output sink/source current for the comparators in MAX9042AEUA-T?
The comparators in MAX9042AEUA-T feature rail-to-rail push-pull outputs capable of sinking and sourcing up to 8mA, as verified in the "Output Voltage Low" (VOL) and "Output Voltage High" (VOH) specifications under load conditions of ISINK = 8mA and ISOURCE = 8mA at VCC = 5V. This is confirmed in the A-grade Electrical Characteristics table on page 2 of the datasheet.
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:
- 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-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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