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Analog Devices Inc./Maxim Integrated MAX40009AUT+
- Part No.:
- MAX40009AUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-6
- Datasheet:
-
MAX40009AUT+.pdf
- Description:
- LOW POWER, FAST COMPARATOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,314
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Product details
Overview
MAX40009AUT+ from Analog Devices is a single micro-power rail-to-rail input comparator with push-pull output, operating from 1.7V to 5.5V supply and consuming only 12μA typical supply current at +25°C. It delivers 220ns propagation delay (L→H), 0.5mV typical input offset voltage, and integrated 3mV hysteresis-enabling clean switching in battery-powered IR receivers and threshold detectors.
For engineers reviewing the MAX40009AUT+ datasheet, MAX40009AUT+ pinout, MAX40009AUT+ application, or MAX40009AUT+ equivalent, key selection criteria include its 6-pin SOT23 package, -40°C to +125°C automotive temperature rating, shutdown input (SHDN) enabling 1μA max quiescent current, and push-pull output capable of sourcing/sinking 8mA while maintaining rail-to-rail swing.
Technical Context
The MAX40009AUT+ implements a low-noise, internally hysteresis-biased comparator core with rail-to-rail input stage extending 200mV beyond VDD and GND. Its push-pull output stage eliminates external pull-up requirements and supports fast, glitch-free switching under capacitive loads up to 15pF.
Shutdown control is active-low on the SHDN pin, reducing supply current to ≤1μA across temperature; power-up time is 50μs. Input bias current remains ≤140nA over -40°C to +125°C, and CMRR is guaranteed ≥52dB, supporting stable operation in noisy portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 5.5V - enables direct use with 1.8V, 2.5V, 3.3V, and 5V system rails without level shifting. |
| Supply Current (Typ) | 12μA at +25°C - extends battery life in always-on sensor monitoring applications. |
| Propagation Delay | 220ns (L→H, 100mV overdrive) - supports high-speed window detection in data recovery circuits. |
| Input Offset Voltage | ±0.5mV (typ), ±5mV (max) - ensures accurate threshold discrimination down to sub-millivolt levels. |
| Hysteresis | 3mV (typ) - suppresses noise-induced oscillation without requiring external feedback components. |
| Output Type | Push-pull - drives logic inputs directly without pull-up resistors; sinks/sours 8mA at VDD = 3.3V. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial embedded environments. |
Pinout & Package
The MAX40009AUT+ is housed in a 6-pin SOT23 package (package code U6+1), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and JEDEC-standard land pattern 90-0175.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN− | Inverting input - accepts rail-to-rail signals from −0.2V to VDD + 0.2V; used for reference or inverted signal comparison. |
| 2 | GND | Signal and power return - must be connected to low-impedance system ground plane to minimize noise coupling. |
| 3 | OUT | Push-pull output - actively drives high/low; compatible with CMOS/TTL loads up to 8mA without external components. |
| 4 | NC | No connect - internal die pad; left unconnected per manufacturer recommendation. |
| 5 | VDD | Positive supply input - requires local 0.1μF ceramic bypass capacitor to GND for stable high-speed operation. |
| 6 | IN+ | Non-inverting input - rail-to-rail capable; paired with IN− to form differential sensing node for threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Operates with common-mode range from −0.2V to VDD + 0.2V - supports direct sensing of signals near supply rails in low-voltage systems. |
| Integrated 3mV hysteresis | Eliminates need for external positive feedback network - simplifies PCB layout and improves reliability in noisy mobile environments. |
| Glitch-free push-pull output | Minimizes supply current surges during switching - prevents voltage droop on shared supply rails in multi-rail portable designs. |
| Active-low shutdown (SHDN) | Reduces IDD to ≤1μA - enables ultra-low-power wake-on-event functionality in IoT endpoint sensors. |
| RF immunity filters | On-chip filtering rejects >100MHz RF interference - maintains stable output in proximity to cellular/Wi-Fi antennas. |
Applications
| IR Receivers | Threshold Detectors |
|---|---|
Use Scenario: Demodulating pulsed infrared signals from remote controls in smartphones and wearables. IC Role / Device Role / Timing Role: Comparator front-end converting analog IR photodiode output into clean digital pulses. Use Value: 220ns propagation delay and 3mV hysteresis ensure jitter-free pulse edge detection even with slow-rising IR envelopes. | Use Scenario: Monitoring battery voltage against low-charge or overvoltage thresholds in portable medical devices. IC Role / Device Role / Timing Role: Precision voltage discriminator triggering system shutdown or alert when VBAT crosses defined limits. Use Value: ±0.5mV input offset and rail-to-rail inputs enable accurate 1.8V–5V threshold setting without external gain stages. |
| Window Comparators | Portable Data Recovery |
Use Scenario: Validating sensor output stays within safe operational bounds in automotive cabin air quality modules. IC Role / Device Role / Timing Role: One half of dual-comparator window circuit detecting out-of-range CO₂ or humidity readings. Use Value: -40°C to +125°C rating and 52dB CMRR maintain trip-point accuracy despite engine bay thermal cycling and EMI. | Use Scenario: Recovering digital data embedded in amplitude-limited analog paths (e.g., legacy sensor interfaces). IC Role / Device Role / Timing Role: Self-biasing comparator comparing input to time-averaged version for adaptive threshold generation. Use Value: Low 12μA supply current and internal hysteresis allow continuous background data slicing without draining coin-cell batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3603DBVR | 320ns propagation delay; 850nA supply current; no integrated hysteresis; 1.8V–5.5V supply. | Lacks internal hysteresis - requires external feedback for noise immunity; better suited for low-quiescent-current always-on monitoring where speed is secondary. | Select TLV3603DBVR when <1μA supply current is critical and external hysteresis design is acceptable. |
| LMV7219M5X | 250ns propagation delay; 22μA supply current; open-drain output; no shutdown pin. | Open-drain output requires pull-up resistor; no shutdown function - unsuitable for duty-cycled sensor nodes needing microamp sleep modes. | Choose LMV7219M5X only if push-pull output and shutdown are not required, and higher supply current is tolerable. |
Compared with TLV3603DBVR and LMV7219M5X, the MAX40009AUT+ uniquely combines 220ns speed, 12μA supply current, integrated hysteresis, push-pull output, and active-low shutdown in a single 6-pin SOT23 package-making it optimal for space-constrained, battery-sensitive automotive and portable designs requiring deterministic switching behavior.
Availability
MAX40009AUT+ is available at Aetrix Electronics and suitable for portable/battery-powered systems, IR receivers, and automotive threshold detection requiring stable component supply across extended temperature ranges.
Supply support for MAX40009AUT+ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX40008/MAX40009 family was designed specifically for ultra-low-power, high-accuracy threshold detection in space- and energy-constrained applications such as wearables, automotive sensors, and IoT endpoints.
FAQ
What is the maximum allowable voltage on the IN+ and IN− pins of the MAX40009AUT+ relative to GND?
The MAX40009AUT+ specifies an absolute maximum input voltage range of −0.3V to +6V on IN+ and IN− pins relative to GND. This allows safe operation with input signals exceeding the supply rail-critical for level translation and fault-tolerant sensing. However, the functional common-mode range is −0.2V to VDD + 0.2V, ensuring specified performance within that band.
Does the MAX40009AUT+ require an external pull-up resistor on its OUT pin?
No, the MAX40009AUT+ features a push-pull output stage, so it actively drives both high and low states without requiring an external pull-up resistor. This differs from the open-drain MAX40008AUT+ variant and simplifies board layout in logic-level interfacing applications.
Can the MAX40009AUT+ operate from a 1.7V supply while maintaining full specification?
Yes, the MAX40009AUT+ is fully specified from 1.7V to 5.5V. At VDD = 1.7V, it guarantees 0.4V VOL (sinking 1.6mA), 0.6V VOH (sourcing 1.6mA), and ≤17μA max supply current across −40°C to +125°C-enabling reliable operation in single-cell Li-ion or alkaline-powered systems.
What is the purpose of the SHDN pin on the MAX40009AUT+, and what voltage levels define its logic states?
The SHDN pin is an active-low shutdown control. A logic-low voltage ≤0.55V places the MAX40009AUT+ into shutdown mode, reducing supply current to ≤1μA. A logic-high voltage ≥1.3V enables normal operation. The transition occurs between 0.55V and 1.3V, with hysteresis preventing chatter near the threshold.
How does the internal 3mV hysteresis of the MAX40009AUT+ improve system reliability in noisy environments?
The internal 3mV hysteresis creates distinct upper and lower trip points, preventing output oscillation when input signals linger near the threshold due to noise or slow slew rates. This eliminates false triggers in IR receivers and battery monitors without requiring external components-reducing BOM count and layout sensitivity in compact portable designs.
MAX40009AUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.7V ~ 5.5V
- :
- 5mV @ 3.3V
- Voltage - Input Offset (Max):
- 0.14µA @ 3.3V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 17µA
- Current - Quiescent (Max):
- 70dB CMRR, 60dB PSRR
- CMRR, PSRR (Typ):
- 340ns (Typ)
- Propagation Delay (Max):
- 3mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-6
MAX40009AUT+ FAQ
1.How can I place an order for MAX40009AUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40009AUT+ 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 MAX40009AUT+ reliable?
The price and inventory of MAX40009AUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40009AUT+ is usually 5 days.
3.What payment methods are accepted for MAX40009AUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40009AUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40009AUT+?
MAX40009AUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40009AUT+ 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 MAX40009AUT+?
For technical support, including MAX40009AUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40009AUT+ requirements.
6.How does Aetrix verify that MAX40009AUT+ is sourced from the original manufacturer or authorized distributors?
All MAX40009AUT+ 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 MAX40009AUT+ meets industry standards.
7.What is the process for return or replacement of MAX40009AUT+?
All MAX40009AUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX40009AUT+, 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 MAX40009AUT+ part is unused and in its original packaging.
Return procedure for MAX40009AUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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