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Analog Devices Inc./Maxim Integrated MAX9140AAUK+T
- Part No.:
- MAX9140AAUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX9140AAUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,772
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Product details
Overview
MAX9140AAUK+T from Analog Devices is a single high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, featuring 40ns propagation delay, 150μA supply current per comparator, and 500μV typical offset voltage. It operates across –40°C to +85°C (E grade), delivers CMOS/TTL-compatible outputs swinging within 300mV of either rail, and is used in battery-powered threshold detection and line receiver circuits.
For engineers reviewing the MAX9140AAUK+T datasheet, MAX9140AAUK+T pinout, MAX9140AAUK+T application, or MAX9140AAUK+T equivalent, key selection criteria include propagation delay vs. supply current trade-off, rail-to-rail input common-mode range (–0.2V to VCC + 0.2V), output drive capability (4mA sink/source), and SOT23-5 package compatibility with space-constrained portable designs.
Technical Context
The MAX9140AAUK+T implements a bipolar-input comparator architecture with internal 1.5mV hysteresis to suppress oscillation during slow-moving or noise-prone input transitions. Its rail-to-rail input stage accepts voltages from –0.2V to VCC + 0.2V, and its current-driven output stage delivers VOH ≥ VCC – 0.425V and VOL ≤ 0.425V at 4mA load.
Designed for low-noise, high-speed decision-making, it avoids external hysteresis resistors and pull-up networks. Input bias current remains below 350nA over temperature, and PSRR exceeds 750µV/V across 2.7V–5.5V supply range - critical for stable operation in noisy mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables reliable sampling of >10MHz signals in timing-critical discriminators. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into both 3.3V and 5V logic domains without level shifting. |
| Input Offset Voltage | Max 6.0mV (–40°C to +85°C) - ensures accurate threshold detection down to sub-mV signal margins. |
| Rail-to-Rail Input Range | –0.2V to VCC + 0.2V - allows interface with sensors or DACs operating beyond supply rails, e.g., ±100mV headroom. |
| Output Drive | 4mA sink/source - directly drives standard CMOS/TTL inputs without external buffering or pull-ups. |
| Quiescent Current | 150μA per comparator at 3V - extends battery life in always-on monitoring applications like smoke detectors. |
| Input Hysteresis | 1.5mV - eliminates chatter on noisy or slowly varying inputs without requiring external feedback components. |
Pinout & Package
MAX9140AAUK+T is housed in a 5-pin SOT23 package (U5-1 land pattern, 0.95mm pitch), optimized for high-density PCB layouts and automated assembly. The compact 2.9mm × 1.6mm footprint supports thermal dissipation up to 571mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Comparator output | CMOS/TTL-compatible push-pull output; swings within 300mV of VCC or GND - no external pull-up needed. |
| 2 - IN− | Inverting input | Differential input terminal; accepts rail-to-rail common-mode voltage; protected against ±20mA continuous fault current. |
| 3 - IN+ | Noninverting input | Differential input terminal; identical voltage range and fault tolerance as IN−; forms core sensing node. |
| 4 - GND | Ground reference | Low-impedance return path for input stage and output driver; must connect to solid ground plane for stability. |
| 5 - VCC | Positive supply | Single power rail (2.7V–5.5V); requires local 0.1μF ceramic decoupling capacitor placed <1mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input operation | Enables direct interface with sensors, DACs, or op-amps whose outputs swing beyond supply rails - eliminates level-shifting circuitry. |
| Internal 1.5mV hysteresis | Guarantees clean, chatter-free switching on slow or noisy inputs - removes need for external positive-feedback resistors. |
| 40ns propagation delay | Supports real-time response in high-speed zero-crossing detection and sampling circuits up to ~25MHz effective bandwidth. |
| 150μA supply current (3V) | Reduces system-level power budget in battery-powered IoT nodes - enables multi-year operation on coin cells. |
| Output swing within 300mV of rails | Ensures full logic-level compatibility with 3.3V and 5V CMOS/TTL families without external pull-up resistors or translators. |
Applications
| Battery-Powered Threshold Detector | 3.3V Line Receiver |
|---|---|
|
Use Scenario: Monitoring battery voltage in a portable medical sensor to trigger low-battery alert when cell drops below 3.0V. IC Role / Device Role / Timing Role: Single comparator comparing divided battery voltage against precision reference; decision latency must be <100ns. Use Value: MAX9140AAUK+T's 40ns delay and rail-to-rail input allow direct sensing of 2.7V–4.2V Li-ion range without external amplification or biasing. |
Use Scenario: Receiving differential analog signals over coaxial cable in industrial PLC I/O modules operating at 3.3V logic. IC Role / Device Role / Timing Role: Single-ended line receiver converting attenuated cable signals into clean digital logic levels for FPGA input. Use Value: Input common-mode range extending –0.2V to VCC + 0.2V accommodates cable-induced DC offsets; 150μA quiescent current minimizes heat in sealed enclosures. |
| Zero-Crossing Detector | Sampling Circuit Trigger |
|
Use Scenario: Detecting AC mains zero crossings in smart energy meters for synchronized ADC sampling and TRIAC control. IC Role / Device Role / Timing Role: High-speed comparator with hysteresis rejecting noise near zero crossing point; output drives microcontroller interrupt pin. Use Value: Internal 1.5mV hysteresis prevents false triggering on EMI; 40ns delay ensures timing jitter <100ns at 50/60Hz - critical for harmonic analysis accuracy. |
Use Scenario: Generating precise sample-enable pulses for a 1Msps SAR ADC in a portable oscilloscope front-end. IC Role / Device Role / Timing Role: Comparator compares ramp generator output to analog input; output edge triggers ADC conversion start. Use Value: Propagation delay matching (tPD+ and tPD− skew ≤2ns) ensures consistent sampling window placement across temperature; rail-to-rail input captures full ADC reference range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-power comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7215M5X/NOPB | Slower 65ns delay; higher 320μA supply current; no internal hysteresis - requires external resistor network. | Suitable for cost-sensitive, lower-speed discriminators where layout area permits hysteresis components. | Choose LMV7215M5X/NOPB only if 40ns speed is unnecessary and BOM simplification via integrated hysteresis is not required. |
| TLV3501CDBVR | Faster 4.5ns delay but consumes 8.5mA; rail-to-rail input limited to VSS + 0.1V to VDD – 0.1V - no beyond-rail capability. | Better for ultra-high-speed sampling clocks but incompatible with sensors exceeding supply rails or low-power battery use. | Choose TLV3501CDBVR only when nanosecond timing dominates and power budget exceeds 1mA per channel. |
Compared with LMV7215M5X/NOPB and TLV3501CDBVR, MAX9140AAUK+T uniquely balances 40ns speed, 150μA power, rail-to-rail input beyond supplies, and integrated hysteresis - making it optimal for space- and energy-constrained 3V/5V portable and industrial sensing nodes.
Availability
MAX9140AAUK+T is available at Aetrix Electronics and suitable for battery-powered systems, line receivers, threshold detectors, and zero-crossing detectors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX9140AAUK+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 MAX9140AAUK+T belongs to the MAX914x family of high-speed, low-power comparators designed specifically for portable, battery-operated, and noise-sensitive 3V/5V systems requiring rail-to-rail input operation and minimal external components.
FAQ
What is the maximum supply voltage rating for MAX9140AAUK+T?
The absolute maximum supply voltage (VCC to GND) for MAX9140AAUK+T is +6V. However, the recommended operating range is 2.7V to 5.5V per datasheet specifications. Exceeding 5.5V may cause parametric degradation or reliability risk, even if within absolute maximum limits. Always operate MAX9140AAUK+T within its specified 2.7V–5.5V range for guaranteed performance and lifetime compliance.
Does MAX9140AAUK+T include internal hysteresis, and what is its value?
Yes, MAX9140AAUK+T includes fixed internal hysteresis of 1.5mV, specified as input-referred hysteresis width. This eliminates the need for external positive-feedback resistors in most noise-prone applications. The hysteresis ensures clean output transitions even with slow-moving or low-slew-rate input signals - a key differentiator from comparators requiring external hysteresis networks.
Can MAX9140AAUK+T interface directly with 3.3V CMOS logic without pull-up resistors?
Yes, MAX9140AAUK+T outputs swing to within 300mV of VCC and GND under 4mA load, meeting standard 3.3V CMOS VIH (≥2.0V) and VIL (≤0.8V) thresholds. Its push-pull output structure provides active drive in both states - no external pull-up resistors are required for reliable interfacing with 3.3V logic families such as those found in microcontrollers and FPGAs.
What is the operating temperature range for MAX9140AAUK+T?
MAX9140AAUK+T is an E-grade device rated for operation from –40°C to +85°C ambient temperature. This range is fully specified and production-tested per datasheet conditions. It is not qualified for automotive AEC-Q100 - that designation applies only to MAX9140AAXK/V+T (SC70 package), not the SOT23-packaged MAX9140AAUK+T.
Is MAX9140AAUK+T pin-compatible with other devices in the MAX914x family?
No, MAX9140AAUK+T is not pin-compatible with MAX9141, MAX9142, or MAX9144 due to differing pin counts and functions (e.g., LE, SHDN, multiple outputs). It uses a dedicated 5-pin SOT23 configuration with only IN+, IN−, OUT, VCC, and GND. Substituting other MAX914x variants requires PCB redesign - MAX9140AAUK+T serves exclusively as a single-channel, no-control-pin comparator.
MAX9140AAUK+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:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 6mV @ 5V
- Voltage - Input Offset (Max):
- 0.35µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 400µA
- Current - Quiescent (Max):
- 61.41dB CMRR, 61.94dB PSRR
- CMRR, PSRR (Typ):
- 40ns
- Propagation Delay (Max):
- 1.5mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX9140AAUK+T FAQ
1.How can I place an order for MAX9140AAUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9140AAUK+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 MAX9140AAUK+T reliable?
The price and inventory of MAX9140AAUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9140AAUK+T is usually 5 days.
3.What payment methods are accepted for MAX9140AAUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9140AAUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9140AAUK+T?
MAX9140AAUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9140AAUK+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 MAX9140AAUK+T?
For technical support, including MAX9140AAUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9140AAUK+T requirements.
6.How does Aetrix verify that MAX9140AAUK+T is sourced from the original manufacturer or authorized distributors?
All MAX9140AAUK+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 MAX9140AAUK+T meets industry standards.
7.What is the process for return or replacement of MAX9140AAUK+T?
All MAX9140AAUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9140AAUK+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 MAX9140AAUK+T part is unused and in its original packaging.
Return procedure for MAX9140AAUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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