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Analog Devices Inc./Maxim Integrated MAX9120EXK+T
- Part No.:
- MAX9120EXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX9120EXK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX9120EXK+T from Analog Devices is a nanopower, open-drain comparator in a 5-pin SC70 package, featuring Beyond-the-Rails™ inputs, guaranteed operation down to +1.6V supply, 350nA supply current, and input common-mode range extending 200mV beyond VEE and VCC. It serves as a low-power threshold detector in battery-monitoring systems where rail-to-rail input capability and minimal quiescent power are critical.
For engineers reviewing the MAX9120EXK+T datasheet, MAX9120EXK+T pinout, MAX9120EXK+T application, or MAX9120EXK+T equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions, confirmed alternative parts with documented functional differences, and supply-chain support details tailored for ultra-low-power embedded designs.
Technical Context
The MAX9120EXK+T implements a break-before-make output stage optimized for open-drain operation, enabling mixed-voltage logic-level translation up to +6V on the output line while powered from as low as +1.6V. Its input stage supports common-mode voltages from (VEE − 0.2V) to (VCC + 0.2V), with ±0.15nA typical input bias current and 4mV internal hysteresis band for noise-immune switching.
This comparator lacks an internal reference (unlike MAX9117/MAX9118), making it suitable for externally referenced or ratiometric sensing applications. Propagation delay is 16µs (high-to-low) and 45µs (low-to-high) at VCC = 5V with 100kΩ pull-up, and supply current remains stable across temperature (−40°C to +85°C) and output transition frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - enables direct interface with single- or dual-cell Li-ion/alkaline batteries without regulation. |
| Supply Current | 350nA at +1.6V - extends battery life in always-on telemetry or medical sensors by minimizing static power draw. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows sensing at ground or supply rail without level-shifting circuitry. |
| Output Type | Open-drain - supports wired-OR logic, I²C-compatible bus interfacing, and mixed-voltage translation (e.g., 5V logic → 3V domain). |
| Propagation Delay | 16µs (tPD−), 45µs (tPD+) at VCC = 5V, RPULLUP = 100kΩ - balances speed and ultra-low power for slow-varying thresholds like battery voltage monitoring. |
| Input Offset Voltage | 1mV (typ), 10mV (max) - ensures accurate trip-point stability in precision threshold detection under varying temperature. |
| Hysteresis | 4mV (internal) - suppresses chatter on noisy or slowly ramping signals such as thermistor or photodiode outputs. |
Pinout & Package
MAX9120EXK+T is housed in a lead-free 5-pin SC70 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.9mm, with 0.65mm pitch and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain output | Requires external pull-up; sinks up to 50mA; supports absolute max output voltage of +6V (relative to VEE). |
| 2 - VEE | Negative supply / ground reference | Typically connected to system ground; defines lower bound of input common-mode and output swing. |
| 3 - IN+ | Noninverting input | Accepts signals from VEE − 0.2V to VCC + 0.2V; bias current <1nA enables high-impedance sensor interfaces. |
| 4 - IN− | Inverting input | Same voltage range and bias specs as IN+; used for differential or single-ended reference comparison. |
| 5 - VCC | Positive supply | Supplies core logic and output stage; must be ≥1.6V; PSRR of 1mV/V minimizes supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Enables direct sensing of signals below ground or above VCC-critical for battery end-of-life detection and rail-to-rail signal monitoring. |
| Crowbar-current-free switching | Eliminates supply glitches during output transitions, reducing need for large bypass capacitors and easing PCB layout in noise-sensitive analog sections. |
| Internal 4mV hysteresis | Guarantees clean, chatter-free output even with microvolt-level noise or slow-moving inputs like thermistors or potentiometers. |
| −40°C to +85°C operation | Validated performance across industrial and portable equipment temperature ranges without derating or external compensation. |
| SC70-5 footprint | Half the area of SOT23-5; supports high-density layouts in space-constrained wearables and implantable devices. |
Applications
| 2-Cell Battery Monitoring | Ultra-Low-Power Telemetry |
|---|---|
Use Scenario: Monitoring voltage decay across two alkaline cells in a remote sensor node to trigger low-battery alert before cutoff. IC Role / Device Role / Timing Role: Threshold detector comparing cell voltage against fixed or ratiometric reference to assert wake-up or flag condition. Use Value: 350nA supply current extends operational lifetime beyond 5 years on 2000mAh AA cells, per manufacturer battery modeling. |
Use Scenario: Detecting periodic environmental events (e.g., door opening, pressure threshold) in a battery-powered asset tracker. IC Role / Device Role / Timing Role: Wake-up comparator enabling MCU sleep mode until event-triggered transition. Use Value: Open-drain output directly interfaces with µC's interrupt pin via shared pull-up, eliminating level-shifters and saving BOM cost. |
| Logic-Level Translation | Ground-Referenced Sensing |
Use Scenario: Converting 5V UART signals to 3.3V logic for an ESP32-based IoT module powered from separate rails. IC Role / Device Role / Timing Role: Bidirectional level shifter using open-drain output pulled to 3.3V while VCC = 5V. Use Value: Eliminates dedicated level-shifter IC; supports >1MHz data rates with 45µs max propagation delay at 100kΩ pull-up. |
Use Scenario: Detecting zero-crossing or overvoltage on a motor phase current sense resistor tied to system ground. IC Role / Device Role / Timing Role: Ground-referenced comparator with IN− grounded and IN+ monitoring shunt voltage. Use Value: Input range extending to VEE − 0.2V allows reliable detection at true ground potential, avoiding offset errors in current-sense circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDCKR | 320nA supply current, 1.8V–5.5V range, no Beyond-the-Rails input (CMVR = GND to VCC − 0.1V) | Not suitable for sub-ground or over-rail sensing; requires input buffering if sensing below GND or above VCC. | Select when supply voltage ≥1.8V and input signals stay within rails; offers slightly lower ICC but reduced input flexibility. |
| MAX40005XK+T | 600nA supply current, includes internal 1.2V reference, push-pull output (no external pull-up needed) | Cannot perform wired-OR or mixed-voltage translation; higher ICC reduces battery life in always-on use cases. | Select when reference integration and drive strength outweigh open-drain flexibility; avoid when logic-level translation is required. |
Compared with TLV3691IDCKR and MAX40005XK+T, the MAX9120EXK+T uniquely combines sub-1.8V operation, true Beyond-the-Rails input, and open-drain output in a 5-pin SC70-making it the only choice for ultra-low-power, rail-flexible threshold detection in compact battery systems.
Availability
MAX9120EXK+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and logic-level translation applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX9120EXK+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 MAX9117–MAX9120 family was designed specifically for nanopower, rail-flexible threshold detection in battery-constrained systems-emphasizing sub-2V operation, ultra-low ICC, and robust input architecture over speed or integration.
FAQ
What is the maximum output voltage the MAX9120EXK+T can safely drive?
The MAX9120EXK+T open-drain output supports an absolute maximum voltage of +6V relative to VEE, allowing direct interface with higher-voltage domains (e.g., 5V logic pulled to 3.3V). This rating holds regardless of VCC value, provided VEE remains at ground or negative reference. Exceeding +6V risks permanent damage to the output transistor.
Does the MAX9120EXK+T require an external reference voltage?
Yes, the MAX9120EXK+T does not include an internal reference - unlike the MAX9117/MAX9118 variants. It must be used with an external reference or ratiometric configuration (e.g., resistor divider from VCC). This simplifies design when precision reference is already available elsewhere in the system and reduces quiescent current to 350nA.
Can the MAX9120EXK+T operate from a single 1.6V supply?
Yes, the MAX9120EXK+T is fully specified to operate with VCC as low as +1.6V (with VEE = 0V), delivering guaranteed performance across −40°C to +85°C. At 1.6V, supply current is 350nA (typ), propagation delay increases to 16µs (tPD−) and 45µs (tPD+), and output swing remains rail-to-rail under ≤1mA load.
What is the purpose of the internal hysteresis in the MAX9120EXK+T?
The MAX9120EXK+T includes 4mV of internal hysteresis to prevent output oscillation when input signals hover near the trip point - common with slow-moving or noisy sources like thermistors or photodiodes. This eliminates need for external positive-feedback resistors in most threshold-detection applications, simplifying design and improving reliability.
Is the MAX9120EXK+T pin-compatible with other comparators in the MAX9117–MAX9120 family?
No - while all SC70-5 variants (MAX9117EXK+T, MAX9118EXK+T, MAX9119EXK+T, MAX9120EXK+T) share identical pinout and package, their internal configurations differ: MAX9117/MAX9118 include a 1.252V reference on Pin 4 (REF), whereas MAX9119/MAX9120 route Pin 4 to IN−. Swapping without schematic revision will cause functional failure.
MAX9120EXK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.6V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.001µA @ 5V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 1.2µA
- Current - Quiescent (Max):
- 66.02dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 45µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SC-70-5
MAX9120EXK+T FAQ
1.How can I place an order for MAX9120EXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9120EXK+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 MAX9120EXK+T reliable?
The price and inventory of MAX9120EXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9120EXK+T is usually 5 days.
3.What payment methods are accepted for MAX9120EXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9120EXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9120EXK+T?
MAX9120EXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9120EXK+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 MAX9120EXK+T?
For technical support, including MAX9120EXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9120EXK+T requirements.
6.How does Aetrix verify that MAX9120EXK+T is sourced from the original manufacturer or authorized distributors?
All MAX9120EXK+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 MAX9120EXK+T meets industry standards.
7.What is the process for return or replacement of MAX9120EXK+T?
All MAX9120EXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9120EXK+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 MAX9120EXK+T part is unused and in its original packaging.
Return procedure for MAX9120EXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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