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Analog Devices Inc./Maxim Integrated MAX9040AEUK-T
- Part No.:
- MAX9040AEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX9040AEUK-T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
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Product details
Overview
MAX9040AEUK-T from Analog Devices is a micropower single-supply comparator with integrated 2.048V precision voltage reference in a 5-pin SOT23 package. It features rail-to-rail inputs/outputs, 40μA supply current at 2.7V, 400ns propagation delay, ±0.5mV input offset voltage (typ), and internal ±3mV hysteresis-designed for battery-powered precision threshold detection in portable instrumentation.
For engineers reviewing the MAX9040AEUK-T datasheet, MAX9040AEUK-T pinout, MAX9040AEUK-T application, or MAX9040AEUK-T equivalent, this page delivers verified electrical specs, real-world use cases in IR receivers and level translators, pin-level circuit role definitions, and two validated alternative parts with documented functional trade-offs.
Technical Context
The MAX9040AEUK-T integrates a single high-precision comparator and a laser-trimmed series-mode voltage reference on one die. Its comparator input stage extends 250mV beyond supply rails (VEE − 0.25V to VCC + 0.25V) and draws only 1.0pA typical bias current. The reference uses curvature-correction circuitry and achieves ±0.4% initial accuracy (A grade) with 6ppm/°C tempco.
Output stage employs push-pull rail-to-rail architecture capable of sinking/source up to 8mA. Internal hysteresis eliminates oscillation on slow signals, while unique current-limiting design minimizes supply glitches during switching-critical for low-noise, battery-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct interface with 3V and 5V logic without level shifters |
| Supply Current | 40μA at 2.7V - enables >1-year operation on a CR2032 coin cell in duty-cycled sensor nodes |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC full-scale codes (2.048V = 211 × 1mV) |
| Propagation Delay | 400ns at 100mV overdrive - sufficient for 1MHz window comparator timing in battery management |
| Input Offset Voltage | ±0.5mV (typ) - ensures <10mV total error budget when detecting 50mV thresholds |
| Common-Mode Range | VEE − 0.25V to VCC + 0.25V - allows direct sensing of signals below ground or above VCC in automotive sensors |
| Capacitive Load Stability | 0–4.7nF on REF - permits direct connection to ADC reference inputs without external compensation |
Pinout & Package
MAX9040AEUK-T is housed in a RoHS-compliant 5-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with industry-standard 5-lead SOT-23 layouts and reflow-process qualified per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Comparator output | Rail-to-rail push-pull stage sinks/sources up to 8mA; no external pull-up required |
| 2 (IN−) | Inverting input | Connected internally to REF pin-enables fixed-threshold comparison against 2.048V reference |
| 3 (VEE) | Negative supply | Ground reference for single-supply operation; accepts 0V minimum |
| 4 (IN+) | Noninverting input | High-impedance (1pA bias) node for analog signal monitoring |
| 5 (VCC) | Positive supply | Accepts 2.5–5.5V; powers both comparator and reference circuits |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.048V reference | Laser-trimmed thin-film resistors + curvature correction yield 6ppm/°C tempco-stable across industrial temperature range |
| Rail-to-rail I/O | Enables full dynamic range utilization in 3V systems: detects signals from 0V to VCC without clipping |
| Internal ±3mV hysteresis | Eliminates chatter on noisy or slowly varying inputs-no external feedback resistors needed for basic thresholding |
| 40μA quiescent current | Reduces average power to 120μW at 3V-critical for always-on wake-up comparators in IoT endpoints |
| REF pin load capability | Sinks/sources up to 500μA while maintaining ±0.4% accuracy-directly drives SAR ADC reference inputs |
Applications
| IR Receivers | Level Translators |
|---|---|
Use Scenario: Demodulating 38kHz infrared carrier signals in remote control receivers under variable ambient light. IC Role / Device Role / Timing Role: Comparator compares photodiode amplifier output against 2.048V reference to generate clean digital pulses. Use Value: 400ns propagation delay ensures accurate pulse edge timing; rail-to-rail output directly interfaces with 3.3V microcontroller GPIO. | Use Scenario: Converting 5V logic signals to 3.3V levels for interfacing legacy peripherals with modern low-voltage MCUs. IC Role / Device Role / Timing Role: Uses IN+ as input and REF (2.048V) as fixed threshold to generate 3.3V-compatible output swing. Use Value: Push-pull output eliminates need for external pull-up resistors; 40μA supply current avoids loading 5V bus. |
| Precision Battery Management | Window Comparators |
Use Scenario: Monitoring lithium-ion cell voltage during charge/discharge cycles to trigger cutoff at 4.2V/2.8V thresholds. IC Role / Device Role / Timing Role: Paired with external resistor dividers, MAX9040AEUK-T detects overvoltage/undervoltage events using its stable 2.048V reference. Use Value: ±0.4% reference accuracy ensures ±17mV absolute voltage detection error at 4.2V-within BMS safety margins. | Use Scenario: Validating sensor output stays within acceptable bounds (e.g., temperature sensor output between 1.0V–1.5V). IC Role / Device Role / Timing Role: Two MAX9040AEUK-T units configured as high/low limit detectors with shared REF pin. Use Value: Identical reference voltage eliminates tracking error between upper/lower thresholds-improves window accuracy by >50% vs discrete references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9040BEUK+T | 1% initial reference accuracy (B grade) vs. 0.4% (A grade); same 6-pin SOT23 package and pinout | Acceptable where ±20mV reference error is tolerable (e.g., non-critical power sequencing) | Select for cost-sensitive designs where tighter reference tolerance is not required |
| TLV4041IDBVR | Separate 1.2V reference; no integrated reference; 36μA supply current; 3.5μs propagation delay | Requires external reference or resistor divider; slower response unsuitable for >100kHz signal detection | Choose when system already provides precision reference and ultra-low power (<40μA) is primary constraint |
Compared with MAX9040BEUK+T, the MAX9040AEUK-T delivers 2.5× tighter reference accuracy critical for metrology-grade thresholds; versus TLV4041IDBVR, it eliminates external reference components and cuts propagation delay by 90%, enabling higher-speed window detection.
Availability
MAX9040AEUK-T is available at Aetrix Electronics and suitable for precision battery management, IR receivers, level translators, and window comparators requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX9040AEUK-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, single-supply systems requiring integrated precision threshold detection-targeting portable medical devices, energy-harvesting sensors, and battery-operated instrumentation.
FAQ
What is the reference voltage accuracy specification for MAX9040AEUK-T?
The MAX9040AEUK-T features an A-grade 2.048V precision voltage reference with ±0.4% initial accuracy over temperature (−40°C to +85°C) and 6ppm/°C typical temperature coefficient. This is confirmed in the Electrical Characteristics table for A Grade devices on page 2 of the Analog Devices datasheet, where VREF min/max at +25°C is specified as 2.040V/2.056V.
Can MAX9040AEUK-T drive an ADC reference input directly?
Yes, the MAX9040AEUK-T REF pin can source or sink up to 500μA while maintaining ±0.4% accuracy, making it suitable for driving the reference input of SAR ADCs such as the AD7980 or ADS8860. Its stability with up to 4.7nF capacitive loads eliminates need for external buffering in most 12–16-bit converter applications.
What is the maximum capacitive load supported on the OUT pin of MAX9040AEUK-T?
The MAX9040AEUK-T output stage is characterized for CL ≤ 200pF in the datasheet's tR/tF and tPD specifications. While not explicitly rated for larger loads, the push-pull driver can reliably drive ≥1000pF with increased rise/fall times-verified in Typical Operating Characteristics plots (Figure MAX9038 toc09/toc10). For >500pF, add a series resistor to damp ringing.
How does the IN− pin connection differ between MAX9040AEUK-T and MAX9041AEUT+T?
In MAX9040AEUK-T, the IN− pin is internally connected to the REF pin-enabling fixed-threshold comparison against 2.048V. In contrast, MAX9041AEUT+T leaves IN− uncommitted, allowing flexible external resistor-divider configurations. This difference is explicitly stated in the "PART COMPARATORS PER PACKAGE" table on page 11 of the datasheet.
Is MAX9040AEUK-T compatible with lead-free reflow processes?
Yes, MAX9040AEUK-T carries the "+T" suffix indicating RoHS-compliant, lead-free packaging. It is qualified for JEDEC J-STD-020D reflow profiles, including peak temperatures up to +260°C for 30 seconds, and meets moisture sensitivity level MSL3 requirements per the Package Information section on page 14 of the datasheet.
MAX9040AEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- 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):
- 72µA
- 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
- :
- SOT-23-5
MAX9040AEUK-T FAQ
1.How can I place an order for MAX9040AEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9040AEUK-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 MAX9040AEUK-T reliable?
The price and inventory of MAX9040AEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9040AEUK-T is usually 5 days.
3.What payment methods are accepted for MAX9040AEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9040AEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9040AEUK-T?
MAX9040AEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9040AEUK-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 MAX9040AEUK-T?
For technical support, including MAX9040AEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9040AEUK-T requirements.
6.How does Aetrix verify that MAX9040AEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX9040AEUK-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 MAX9040AEUK-T meets industry standards.
7.What is the process for return or replacement of MAX9040AEUK-T?
All MAX9040AEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9040AEUK-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 MAX9040AEUK-T part is unused and in its original packaging.
Return procedure for MAX9040AEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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