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Analog Devices Inc./Maxim Integrated MAX9140AAXK+T
- Part No.:
- MAX9140AAXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX9140AAXK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
MAX9140AAXK+T from Analog Devices is a single high-speed rail-to-rail input comparator optimized for 3V/5V single-supply operation, delivering 40ns propagation delay, 150μA supply current per comparator, and 500μV typical offset voltage. It features internal 1.5mV hysteresis, rail-to-rail output swing within 300mV of either supply rail, and robust fault tolerance - ideal for battery-powered threshold detection in portable instrumentation and line receivers.
For engineers reviewing the MAX9140AAXK+T datasheet, MAX9140AAXK+T pinout, MAX9140AAXK+T application, or MAX9140AAXK+T equivalent, key selection criteria include propagation delay vs. supply current trade-off, input common-mode range beyond rails (–0.2V to VCC + 0.2V), AEC-Q100 qualification status, SC70-5 package footprint, and absence of latch/shutdown pins unlike MAX9141 variants.
Technical Context
The MAX9140AAXK+T implements a bipolar process-based comparator core with fixed internal hysteresis (1.5mV) to suppress oscillation during slow input transitions. Its rail-to-rail input stage accepts voltages from –0.2V to VCC + 0.2V, while the current-driven output stage delivers VOH = VCC – 0.3V and VOL = 0.3V at 4mA load without external pull-ups.
It operates across 2.7V to 5.5V supply range with guaranteed performance from –40°C to +125°C (A-grade), exhibits 80dB CMRR and PSRR over full temperature range, and tolerates continuous short-circuit faults on all I/O pins to either rail - enabling direct interface to CMOS/TTL logic in noise-sensitive 3V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables reliable sampling of >10MHz analog signals in zero-crossing or timing-critical circuits. |
| Supply Current | 150μA per comparator at 3V - supports multi-year battery life in always-on sensor monitoring nodes. |
| Input Offset Voltage | 0.5–2.0mV (typical 0.5mV at +25°C) - ensures accurate threshold detection down to sub-millivolt levels. |
| Input Common-Mode Range | –0.2V to VCC + 0.2V - allows direct sensing of signals below ground or above VCC, e.g., in differential line receiver front-ends. |
| Output Voltage Swing | VOL = 0.3V / VOH = VCC – 0.3V at 4mA - guarantees clean logic-level compatibility with 3.3V/5V CMOS and TTL without level-shifting. |
| Hysteresis | 1.5mV input-referred - eliminates need for external positive feedback resistors in noisy industrial environments. |
| Operating Temperature | –40°C to +125°C (A-grade) - qualified for under-hood automotive and industrial control applications. |
Pinout & Package
The MAX9140AAXK+T is housed in a 5-pin SC70 package (package code X5+1), measuring 2.0mm × 1.25mm × 0.95mm, with 0.65mm lead pitch and RoHS-compliant matte tin finish. Pin 1 is marked with a dot; pin numbering follows standard SC70 orientation (counterclockwise from mark).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Open-drain compatible CMOS/TTL output - sinks up to 4mA, pulls within 0.3V of GND or VCC without external pull-up. |
| 2 | IN– | Inverting input - accepts rail-to-rail common-mode voltage; protected by back-to-back diodes and 4.1kΩ series resistors. |
| 3 | IN+ | Noninverting input - identical protection and voltage range as IN–; differential input tolerance ±20mA continuous. |
| 4 | GND | Analog ground reference - must connect to low-impedance PCB ground plane to maintain 40ns timing accuracy. |
| 5 | VCC | Positive supply - operates from 2.7V to 5.5V; requires local 0.1μF ceramic decoupling capacitor placed ≤2mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Supports signal acquisition below GND or above VCC - critical for detecting negative-going transients in single-supply data acquisition. |
| Internal 1.5mV hysteresis | Eliminates external resistor network for noise immunity - reduces BOM count and layout area in space-constrained wearables. |
| 40ns propagation delay | Enables real-time response in 25MHz clock domain edge detection - suitable for high-speed serial link signal integrity monitoring. |
| AEC-Q100 qualified (Grade 1) | Validated for automotive powertrain and body electronics - includes HTOL, TCT, ESD, and AC/DC stress testing per Rev H standards. |
| SC70-5 package | 2.0mm × 1.25mm footprint - fits into <1.5mm² board area, enabling ultra-compact designs for medical patch monitors and IoT sensors. |
Applications
| Line Receiver | Threshold Detector |
|---|---|
Use Scenario: Receiving differential RS-422/RS-485 signals in industrial PLC I/O modules operating from 3.3V supplies. IC Role / Device Role / Timing Role: Single comparator acting as line receiver front-end, converting analog bus voltage swings into clean digital logic levels. Use Value: Rail-to-rail inputs accept –7V to +12V common-mode range via external resistive divider; 40ns delay ensures accurate recovery of 10Mbps data streams. |
Use Scenario: Monitoring battery cell voltage in lithium-ion pack management systems with 3.0V nominal supply. IC Role / Device Role / Timing Role: Precision threshold detector comparing cell voltage against 2.95V cutoff reference. Use Value: 500μV offset and 1.5mV hysteresis prevent chatter near trip point; 150μA quiescent current extends standby time to >5 years. |
| Zero-Crossing Detector | Sampling Circuit Trigger |
Use Scenario: Detecting AC mains zero-crossing in smart energy meters using transformer-coupled 230VAC input. IC Role / Device Role / Timing Role: High-speed comparator generating precise timing edges synchronized to 50Hz/60Hz waveform zero crossings. Use Value: 40ns delay minimizes phase error (<0.002° at 50Hz); rail-to-rail inputs tolerate ±10V peak-to-peak input after scaling. |
Use Scenario: Generating sample-enable pulses for SAR ADCs in portable oscilloscopes powered from LiPo batteries. IC Role / Device Role / Timing Role: Fast comparator triggering ADC conversion upon analog input crossing programmable threshold. Use Value: Propagation delay skew <2ns between units ensures sub-10ps jitter in multi-channel sampling systems. |
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 | 45ns delay, 120μA supply current, no internal hysteresis, SOT23-5 package | Lacks built-in hysteresis - requires external feedback resistors for noise immunity in EMI-prone environments | Select when lowest possible quiescent current is prioritized over design simplicity and noise margin. |
| TLV3501DBVR | 4.5ns delay, 5.3mA supply current, rail-to-rail output only, SOT23-6 package | Higher speed but 35× higher power - unsuitable for battery-operated devices requiring multi-year runtime | Select only for ultra-high-speed timing-critical applications where 40ns delay is insufficient and power budget allows. |
Compared with LMV7215M5X/NOPB, MAX9140AAXK+T provides integrated hysteresis and tighter offset (0.5mV vs. 3.5mV), reducing component count and improving accuracy; versus TLV3501DBVR, it trades raw speed for 35× lower power and smaller SC70 footprint - making it optimal for portable, precision threshold detection.
Availability
MAX9140AAXK+T is available at Aetrix Electronics and suitable for battery-powered systems, line receivers, threshold discriminators, and 3V/5V embedded control applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MAX9140AAXK+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 since 1965.
The MAX9140AAXK+T belongs to the MAX914x family of high-speed comparators designed specifically for low-voltage, low-power, rail-to-rail operation in portable and automotive electronics - emphasizing speed/power optimization and robustness in harsh electrical environments.
FAQ
What is the maximum supply voltage rating for MAX9140AAXK+T?
The MAX9140AAXK+T has an absolute maximum supply voltage (VCC to GND) of +6V. However, its specified operating range is 2.7V to 5.5V. Operation outside this range may cause parametric degradation or permanent damage. The device is characterized and guaranteed for performance only within the 2.7V–5.5V window, with optimal 40ns propagation delay and 150μA supply current achieved at 3V and 5V nominal supplies. Always observe derating curves for power dissipation above +70°C ambient.
Does MAX9140AAXK+T include latch or shutdown functionality?
No, the MAX9140AAXK+T does not include latch enable (LE) or shutdown (SHDN) pins. These features are exclusive to the MAX9141 variant (8-pin SOT23/SO). The MAX9140AAXK+T is a minimal-function, single-comparator device with only five pins: OUT, IN–, IN+, GND, and VCC. This simplifies PCB layout and reduces cost in applications where continuous operation and basic comparison suffice - such as fixed-threshold detection in sensor interfaces or line receivers.
Is MAX9140AAXK+T AEC-Q100 qualified, and what grade does it meet?
Yes, the MAX9140AAXK+T is AEC-Q100 qualified per Grade 1 requirements (–40°C to +125°C junction temperature), as explicitly stated in the datasheet Features section and Ordering Information table. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), electrostatic discharge (ESD), and AC/DC electrical verification. The "A" in MAX9140AA_ _ denotes the A-grade temperature range, and the "/V" suffix in MAX9140AAXK/V+T indicates automotive qualification - though MAX9140AAXK+T itself carries the same AEC-Q100 validation per Analog Devices' documentation.
What is the input protection architecture of MAX9140AAXK+T?
The MAX9140AAXK+T employs dual 4.1kΩ series resistors and back-to-back diodes between IN+ and IN– to protect the precision input stage. This architecture limits differential input voltage to ≤1.4V (2 × VF) and allows continuous short-circuit fault tolerance to either supply rail. Input current under large differential conditions follows I = (|IN+ – IN–| – 2VF)/8.2kΩ, distinct from normal bias current (90–320nA). This protection enables safe operation in industrial fieldbus interfaces where transient overvoltages up to ±20V may occur on signal lines.
Can MAX9140AAXK+T drive standard TTL or CMOS logic directly?
Yes, MAX9140AAXK+T outputs are fully compatible with both TTL and CMOS logic families without external pull-up resistors. At 4mA sink/source load, it guarantees VOL ≤ 0.425V and VOH ≥ VCC – 0.47V over temperature, meeting TTL VOH/VOL thresholds (≥2.4V/≤0.8V at 5V) and CMOS VIH/VIL (≥70% VCC / ≤30% VCC). Its rail-to-rail output swing within 300mV of either rail ensures noise margins >0.4V in 3.3V systems and >0.7V in 5V systems - verified across –40°C to +125°C operation.
MAX9140AAXK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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
- :
- SC-70-5
MAX9140AAXK+T FAQ
1.How can I place an order for MAX9140AAXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9140AAXK+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 MAX9140AAXK+T reliable?
The price and inventory of MAX9140AAXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9140AAXK+T is usually 5 days.
3.What payment methods are accepted for MAX9140AAXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9140AAXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9140AAXK+T?
MAX9140AAXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9140AAXK+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 MAX9140AAXK+T?
For technical support, including MAX9140AAXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9140AAXK+T requirements.
6.How does Aetrix verify that MAX9140AAXK+T is sourced from the original manufacturer or authorized distributors?
All MAX9140AAXK+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 MAX9140AAXK+T meets industry standards.
7.What is the process for return or replacement of MAX9140AAXK+T?
All MAX9140AAXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9140AAXK+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 MAX9140AAXK+T part is unused and in its original packaging.
Return procedure for MAX9140AAXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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