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Analog Devices Inc./Maxim Integrated MAX9031AUK-T
- Part No.:
- MAX9031AUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX9031AUK-T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,016
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Product details
Overview
The MAX9031AUK-T from Maxim Integrated is a single, rail-to-rail output comparator optimized for low-power, single-supply operation from +2.5V to +5.5V, featuring 188ns propagation delay, 35μA supply current per comparator, 4mV internal hysteresis, and operation across -40°C to +125°C - deployed in battery-powered portable systems and sensor signal detection circuits.
For engineers reviewing the MAX9031AUK-T datasheet, MAX9031AUK-T pinout, MAX9031AUK-T application, or MAX9031AUK-T equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative options for industrial and portable design validation.
Technical Context
The MAX9031AUK-T implements a precision comparator core with input common-mode range extending from VSS to (VDD − 1.1V), enabling direct interfacing with sensors operating near ground. Its output stage minimizes switching current transients, eliminating power-supply glitches during transitions.
It integrates 4mV built-in hysteresis to suppress noise-induced oscillation on slow-moving inputs, and supports rail-to-rail output swing into 4mA loads with <400mV VOL/VOH drop - critical for logic-level compatibility in 3.3V and 5V microcontroller interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - enables direct use with Li-ion, 3.3V, and 5V rails without level-shifting. |
| Propagation Delay | 188ns at VOD = 100mV - supports fast threshold detection in digital line receivers and photodiode preamp outputs. |
| Supply Current | 35μA per comparator - allows continuous operation in multi-year battery-powered IoT nodes. |
| Input Offset Voltage | ±5mV max - ensures reliable discrimination of small-signal thresholds (e.g., ±10mV sensor windows). |
| Hysteresis | 4mV built-in - provides inherent noise immunity without external feedback resistors in threshold detectors. |
| Common-Mode Range | VSS to (VDD − 1.1V) - accommodates ground-referenced analog signals in portable medical and wearables. |
| Output Swing | Rail-to-rail (VOL ≤ 400mV at 4mA sink/source) - guarantees clean TTL/CMOS-compatible logic levels. |
Pinout & Package
MAX9031AUK-T is housed in a 5-pin SOT23 package (package code U5+1), with exposed pad not electrically connected. The compact 2.9mm × 1.6mm footprint supports high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VSS | Negative supply reference - must be bypassed with 0.1µF capacitor to minimize noise coupling into comparator inputs. |
| 2 | OUT | Open-drain compatible rail-to-rail output - drives logic inputs directly or interfaces with pull-up resistors up to 10kΩ. |
| 3 | IN− | Inverting input - accepts signals within VSS to (VDD − 1.1V); differential input voltage limited to ±6.6V. |
| 4 | IN+ | Noninverting input - same common-mode range as IN−; no phase reversal when overdriven beyond rails. |
| 5 | VDD | Positive supply input - requires local 0.1µF ceramic bypass capacitor placed adjacent to pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on overdrive | Ensures predictable output polarity even when inputs exceed VDD or fall below VSS - critical for fault-tolerant sensor monitoring. |
| Ultra-low 35μA supply current | Enables always-on wake-up comparators in battery-backed systems with >5-year shelf life at 1Hz polling rate. |
| 188ns propagation delay | Supports real-time response in digital line receivers handling >1Mbps NRZ data streams without timing jitter. |
| 4mV internal hysteresis | Eliminates need for external positive feedback components in keyless entry RF envelope detectors and photodiode thresholding. |
| Rail-to-rail output swing | Delivers full logic-high and logic-low levels into 4mA loads - simplifies interface with MSP430, STM32, and PIC microcontrollers. |
Applications
| Battery-Powered Threshold Detection | Photodiode Signal Discrimination |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging to trigger cutoff at 4.2V and prevent overvoltage. IC Role / Device Role / Timing Role: Single comparator comparing cell voltage against precision reference; 188ns response ensures timely shutdown before damage. Use Value: Enables safe, autonomous battery management without MCU intervention - reducing system power and firmware complexity. |
Use Scenario: Converting weak, noisy photodiode current (nA–µA range) into clean digital pulses for optical encoders. IC Role / Device Role / Timing Role: High-speed comparator with 4mV hysteresis rejecting ambient light ripple while preserving edge integrity. Use Value: Delivers jitter-free quadrature signals for motor position control - eliminating false counts in industrial motion systems. |
| Digital Line Receiver | Keyless Entry RF Envelope Detection |
|
Use Scenario: Recovering UART or SPI clock/data from attenuated, capacitively coupled traces in modular PCB interconnects. IC Role / Device Role / Timing Role: Comparator acting as adaptive threshold receiver; rail-to-rail output directly drives CMOS input stages. Use Value: Extends reliable communication distance by >30% versus op-amp-based receivers - without added bias networks or calibration. |
Use Scenario: Detecting presence of 315MHz/433MHz RF carrier envelope in automotive key fob receivers. IC Role / Device Role / Timing Role: Fast comparator converting rectified RF envelope into clean logic pulses for ASK demodulation. Use Value: Achieves sub-100µs wake-up latency with 4mV hysteresis rejecting burst noise - meeting ISO 11452-2 EMI immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-supply comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701IDBVR | Higher 850ns propagation delay; 600nA supply current; no built-in hysteresis. | Lower speed suits ultra-low-power wake-up only; requires external hysteresis resistors for noise immunity. | Select when nanowatt standby dominates over response time - not for >100kHz signal detection. |
| LMV7215M5X | 220ns propagation delay; 85μA supply current; 6.5mV hysteresis; wider 2.7–5.5V range. | Slightly higher power and slower response; better hysteresis margin for high-noise automotive environments. | Prefer for AEC-Q100-compliant designs where 6.5mV hysteresis improves robustness over 4mV in engine bay sensors. |
Compared with TLV3701IDBVR and LMV7215M5X, the MAX9031AUK-T delivers the optimal balance of speed (188ns), ultra-low quiescent current (35μA), and integrated 4mV hysteresis - making it uniquely suited for portable, high-reliability threshold detection where layout area and external components are constrained.
Availability
MAX9031AUK-T is available at Aetrix Electronics and suitable for battery-powered threshold detection, photodiode signal discrimination, and digital line receiver applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX9031AUK-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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, communications, and consumer applications - emphasizing low power, small size, and high reliability.
The MAX9030/MAX9031/MAX9032/MAX9034 family was engineered specifically for space-constrained, battery-operated systems needing fast, low-quiescent-current comparators with built-in noise immunity - targeting portable medical devices, wearables, and wireless sensor nodes.
FAQ
What is the maximum capacitive load the MAX9031AUK-T can drive without oscillation?
The MAX9031AUK-T is specified to drive up to 150pF without sustained oscillations, as confirmed in the Electrical Characteristics table under "Maximum Capacitive Load". This value applies across the full -40°C to +125°C temperature range and supports stable operation with typical PCB trace capacitance and small external filtering networks. Exceeding 150pF may degrade propagation delay and increase susceptibility to ringing - especially when combined with high-source-impedance inputs.
Does the MAX9031AUK-T have a shutdown pin?
No, the MAX9031AUK-T does not include a shutdown pin. Shutdown functionality is exclusive to the MAX9030 variant (e.g., MAX9030AXT+T), which features a dedicated SHDN pin. The MAX9031AUK-T is a non-shutdown single comparator - confirmed by its 5-pin SOT23 pinout (VSS, OUT, IN−, IN+, VDD) and absence of SHDN in all MAX9031 ordering options and pin descriptions.
What is the input common-mode voltage range for the MAX9031AUK-T?
The input common-mode voltage range for the MAX9031AUK-T is specified from VSS to (VDD − 1.1V) - guaranteed by CMRR testing and valid across the full -40°C to +125°C operating temperature range. For example, at VDD = +3.3V, inputs may swing from 0V to +2.2V; at VDD = +5.5V, the upper limit is +4.4V. This range enables direct connection to ground-referenced sensors and resistive dividers without level-shifting circuitry.
Can the MAX9031AUK-T operate from dual supplies?
Yes, the MAX9031AUK-T supports dual-supply operation from ±1.25V to ±2.75V, as stated in the Detailed Description section. However, its primary optimization is for single-supply use (+2.5V to +5.5V), and all key specifications - including propagation delay, supply current, and hysteresis - are characterized and guaranteed under single-supply conditions. Dual-supply use is viable but requires verifying performance against the datasheet's single-supply test conditions.
Is the MAX9031AUK-T RoHS-compliant and lead-free?
Yes, the MAX9031AUK-T is RoHS-compliant and lead-free. The "+T" suffix in the part number denotes tape-and-reel packaging and RoHS compliance, consistent with Maxim Integrated's standard marking convention where "+" indicates lead(Pb)-free/RoHS-compliant packaging - confirmed in the Ordering Information table and Package Information section of the datasheet.
MAX9031AUK-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:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 0.008µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 55µA
- Current - Quiescent (Max):
- 100dB CMRR, 100dB PSRR
- CMRR, PSRR (Typ):
- 228ns
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX9031AUK-T FAQ
1.How can I place an order for MAX9031AUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9031AUK-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 MAX9031AUK-T reliable?
The price and inventory of MAX9031AUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9031AUK-T is usually 5 days.
3.What payment methods are accepted for MAX9031AUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9031AUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9031AUK-T?
MAX9031AUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9031AUK-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 MAX9031AUK-T?
For technical support, including MAX9031AUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9031AUK-T requirements.
6.How does Aetrix verify that MAX9031AUK-T is sourced from the original manufacturer or authorized distributors?
All MAX9031AUK-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 MAX9031AUK-T meets industry standards.
7.What is the process for return or replacement of MAX9031AUK-T?
All MAX9031AUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9031AUK-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 MAX9031AUK-T part is unused and in its original packaging.
Return procedure for MAX9031AUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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