My Inquiry
My Account
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:3,081
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX9040AEUK+T from Analog Devices is a micropower single-supply comparator with integrated 2.048V precision voltage reference, featuring rail-to-rail inputs/outputs, 40μA supply current at 2.7V, ±0.5mV input offset voltage, and 400ns propagation delay - deployed in battery-powered precision threshold detection and level translation circuits.
For engineers reviewing the MAX9040AEUK+T datasheet, MAX9040AEUK+T pinout, MAX9040AEUK+T application, or MAX9040AEUK+T equivalent, this page delivers verified functional identity, A-grade reference accuracy (±0.4%), SOT23-5 package mapping, confirmed pin roles, and real-world design trade-offs versus alternatives.
Technical Context
The device integrates a single high-precision comparator and a laser-trimmed series-mode voltage reference on a CMOS process. Its comparator uses internal ±3mV hysteresis and a low-glitch push-pull output stage capable of sourcing/sinking 8mA while maintaining stable quiescent current under dynamic switching.
The reference employs curvature correction and thin-film resistor trimming to achieve 6ppm/°C tempco (A grade) and stability with up to 4.7nF capacitive loads - enabling direct use in ADC reference, sensor biasing, and window comparator topologies without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct operation from Li-ion, 3.3V, and 5V rails without regulation. |
| Supply Current (Typ) | 40μA at 2.7V - enables >1-year battery life in coin-cell–powered monitoring systems. |
| Reference Voltage | 2.048V ±0.4% (A grade) - matches standard 12-bit DAC/ADC full-scale codes for zero-gain error designs. |
| Input Offset Voltage | ±0.5mV (typ) - allows accurate detection of sub-mV signal thresholds in sensor interfaces. |
| Propagation Delay | 400ns at 100mV overdrive - supports reliable timing in 1MHz-level digital signal conditioning. |
| Common-Mode Range | VEE − 0.25V to VCC + 0.25V - enables direct sensing of signals beyond supply rails (e.g., automotive wake-up detection). |
| Reference Tempco | 6ppm/°C (typ) - contributes <±0.5mV drift over −40°C to +85°C, critical for industrial temperature sensing. |
Pinout & Package
MAX9040AEUK+T is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057), with 1.6mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained portable and wearable electronics.
| 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 | Uncommitted input; accepts voltages from VEE − 0.25V to VCC + 0.25V. |
| 3 - IN+ | Noninverting input | Same rail-to-rail common-mode range as IN−; used for threshold comparison against REF or external signal. |
| 4 - VEE | Negative supply | Ground reference (0V) in single-supply operation; must be connected for proper biasing. |
| 5 - VCC | Positive supply | Accepts 2.5V–5.5V; powers both comparator and reference; decoupling recommended near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.048V reference | Laser-trimmed thin-film resistors + curvature correction yield 6ppm/°C tempco and 0.4% initial accuracy - eliminates need for external reference IC in 12-bit systems. |
| Rail-to-rail I/O | Input range extends 250mV beyond rails; output swings within 200mV of rails at 8mA load - maximizes dynamic range in low-voltage systems. |
| Low-switching-current output | Minimal supply current surge during transitions reduces supply noise - cuts bypass capacitor count and PCB area in noise-sensitive analog front-ends. |
| Internal 3mV hysteresis | Prevents chatter on slow-moving or noisy inputs - enables robust window detection without external feedback components. |
| Capacitive-load stability | Stable with 0–4.7nF on REF pin - supports direct connection to ADC reference inputs and RC filtering without oscillation risk. |
Applications
| Precision Battery Management | Window Comparators |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger cutoff or alert at 2.048V ±10mV thresholds. IC Role / Device Role / Timing Role: Comparator compares cell voltage against internally generated 2.048V reference; output drives enable/disable logic or MCU interrupt. Use Value: Eliminates external reference and reduces BOM count by one component while maintaining ±0.4% trip-point accuracy across temperature. | Use Scenario: Detecting if an analog sensor output remains within safe operational bounds (e.g., 2.0V–2.1V for pressure transducer). IC Role / Device Role / Timing Role: Single MAX9040AEUK+T used in dual-threshold configuration with external resistive divider; REF supplies stable mid-point reference. Use Value: Internal reference stability ensures window width remains fixed at ±5mV over −40°C to +85°C - avoids false trips in industrial environments. |
| IR Receivers | Level Translators |
Use Scenario: Converting weak, noisy IR photodiode signals into clean digital pulses for microcontroller decoding. IC Role / Device Role / Timing Role: Comparator detects modulated IR carrier envelope using REF as DC bias; rail-to-rail output directly interfaces 3.3V logic. Use Value: 400ns propagation delay and internal hysteresis suppress ambient light noise while preserving 38kHz carrier fidelity. | Use Scenario: Translating 5V logic signals down to 3.3V or 1.8V domains in mixed-voltage microcontroller systems. IC Role / Device Role / Timing Role: IN+ tied to 5V signal; REF (2.048V) sets threshold; OUT drives lower-voltage rail via push-pull output. Use Value: Push-pull output eliminates need for external pull-down resistor; 8mA drive strength supports fan-out to multiple 3.3V inputs. |
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 | B-grade reference (±1% initial accuracy, 100ppm/°C tempco); otherwise identical pinout, supply, and speed. | Suitable where cost sensitivity outweighs precision - e.g., consumer-grade battery indicators with ±5% tolerance. | Select MAX9040BEUK+T only when reference accuracy requirements relax to ±1% and tempco >100ppm/°C is acceptable. |
| TLV4041IDBVR | Single comparator with internal 1.2V reference; 650nA supply current; no rail-to-rail input; 3.5μs propagation delay. | Lower power but slower and less precise - fits ultra-low-power wake-up sensors, not precision thresholding. | Choose TLV4041IDBVR only for sub-1μA standby systems where 2.048V matching and 400ns timing are non-critical. |
Compared with MAX9040BEUK+T, the MAX9040AEUK+T delivers 2.5× tighter reference accuracy and 16× lower tempco - essential for metrology-grade sensing. Versus TLV4041IDBVR, it trades 16× higher supply current for 8.75× faster response and exact 2.048V compatibility with 12-bit data converters.
Availability
MAX9040AEUK+T is available at Aetrix Electronics and suitable for precision battery management, IR receivers, window comparators, and level translators requiring stable component supply across industrial and medical OEM programs.
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 designed to integrate precision voltage references with ultra-low-power comparators in miniature packages - targeting space- and power-constrained applications like portable instrumentation and battery-powered IoT endpoints.
FAQ
What is the reference voltage accuracy specification for MAX9040AEUK+T?
The MAX9040AEUK+T features an A-grade 2.048V voltage reference with ±0.4% initial accuracy over temperature and 6ppm/°C typical temperature coefficient. This is verified per Analog Devices' Electrical Characteristics table for A-grade devices at TA = −40°C to +85°C, ensuring tight tolerance for 12-bit system calibration without external trimming.
Does MAX9040AEUK+T support rail-to-rail input operation?
Yes, MAX9040AEUK+T supports rail-to-rail input operation with a common-mode voltage range extending 250mV beyond both supply rails (VEE − 0.25V to VCC + 0.25V). This capability is confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet, enabling direct interface to overvoltage signals in automotive or industrial sensor front-ends.
What is the maximum capacitive load the REF pin of MAX9040AEUK+T can drive?
The REF pin of MAX9040AEUK+T is stable with capacitive loads from 0 to 4.7nF, as specified in the Electrical Characteristics table under "Capacitive-Load Stability Range." This allows direct connection to ADC reference inputs, sample-and-hold capacitors, or RC filters without risk of oscillation - a key advantage over references requiring external isolation.
Can MAX9040AEUK+T be used in dual-supply configurations?
No, MAX9040AEUK+T is designed exclusively for single-supply operation from 2.5V to 5.5V. Its absolute maximum ratings specify VCC to VEE as −0.3V to +6V, but the functional operating range requires VEE = 0V (ground) and VCC ≥ 2.5V. Dual-supply use is not supported and may damage the device or violate reference output specifications.
What is the output drive capability of MAX9040AEUK+T?
MAX9040AEUK+T provides rail-to-rail push-pull output capable of sinking and sourcing up to 8mA, with VOL ≤ 0.55V at 5V supply/8mA sink and VOH ≥ 4.45V at 5V supply/8mA source. These values are measured per the Electrical Characteristics table and enable direct interfacing to standard logic families without external level-shifting circuitry.
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:
- Active
- 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.
MAX9040AEUK+T Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
