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Analog Devices Inc./Maxim Integrated MAX9118EXK+T
- Part No.:
- MAX9118EXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX9118EXK+T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,191
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Product details
Overview
The MAX9118EXK+T from Analog Devices is a nanopower, open-drain comparator with integrated 1.252V ±1.75% reference, guaranteed to operate from +1.6V supply, consuming only 600nA supply current, and featuring Beyond-the-Rails™ inputs extending 200mV beyond VEE and VCC - ideal for 2-cell battery monitoring in portable medical instruments and telemetry systems.
For engineers reviewing the MAX9118EXK+T datasheet, MAX9118EXK+T pinout, MAX9118EXK+T application, or MAX9118EXK+T equivalent, key selection criteria include ultra-low quiescent current, open-drain output compatibility with mixed-voltage logic translation, internal reference accuracy and temperature coefficient, input common-mode range, and propagation delay under varying pull-up resistance and supply voltage.
Technical Context
The MAX9118EXK+T implements a break-before-make output stage optimized for rail-to-rail operation with up to ±5mA load capability while minimizing supply-current surges during switching - eliminating typical supply glitches. Its input stage supports common-mode voltages from VEE − 0.2V to VCC + 0.2V and includes internal hysteresis of 4mV for noise-immune switching.
The device integrates a PNP emitter-follower reference (1.252V, 100ppm/°C TC, 200kΩ output impedance) referenced to VEE, stable with any capacitive load, and requires no external compensation. The open-drain output allows absolute voltage swing up to +6V relative to VEE, enabling direct interfacing with higher-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - enables direct operation from single Li-ion or dual alkaline cells without regulation. |
| Supply Current | 600nA at +1.6V - extends battery life in always-on sensing nodes beyond 2.5 million hours per AA cell. |
| Reference Voltage | 1.252V ±1.75% (±22mV) - provides stable threshold for precision low-voltage battery end-of-life detection. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - supports ground-referenced or supply-referenced sensing without level-shifting. |
| Output Type | Open-drain - permits wire-OR logic, mixed-voltage interface (e.g., 5V VCC with 3V pull-up), and I²C-compatible bus sharing. |
| Propagation Delay | 16µs (high-to-low) at VCC = +1.6V, RPULLUP = 100kΩ - ensures timely response in low-power wake-up circuits. |
| Hysteresis | 4mV - suppresses chatter on slow-moving signals like thermistor or battery voltage ramps. |
Pinout & Package
MAX9118EXK+T is housed in a 5-pin SC70-5 package (X5-1), measuring 2.0mm × 1.25mm × 0.9mm, with 0.65mm lead pitch and RoHS-compliant lead-free finish (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Open-drain output - must be pulled up externally; sinks current only; compatible with 3V/5V logic domains. |
| 2 | VEE | Negative supply (typically GND) - reference for internal 1.252V reference and input common-mode range. |
| 3 | IN+ | Noninverting input - accepts signals up to VCC + 0.2V; used for threshold comparison against REF or IN−. |
| 4 | REF | Internal 1.252V reference output - buffered reference node; bypassing with low-leakage capacitor improves stability. |
| 5 | VCC | Positive supply - powers comparator core and reference; operates down to +1.6V with full specification. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ Inputs | Accepts input signals 200mV below VEE or above VCC - eliminates need for external level shifters in ground- or supply-sensing applications. |
| Crowbar-Current-Free Switching | Minimizes supply current transients during output transitions - reduces required bulk capacitance and eases power integrity design. |
| Internal Reference Accuracy | 1.252V ±1.75% over −40°C to +85°C - enables accurate, temperature-stable battery voltage monitoring without external components. |
| Ultra-Low Power Operation | 600nA supply current at +1.6V - supports multi-year operation on coin cells or primary batteries in remote sensor nodes. |
| Open-Drain Output Architecture | Supports mixed-voltage logic translation (e.g., 5V domain driving 3V MCU input) and wired-AND bus configurations. |
Applications
| 2-Cell Battery Monitoring | Telemetry Threshold Detection |
|---|---|
Use Scenario: Monitoring voltage of dual alkaline or NiMH cells in portable diagnostic equipment to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Comparator comparing battery voltage against internal 1.252V reference scaled via resistor divider to detect <1.8V/cell threshold. Use Value: Eliminates external reference and reduces BOM count by one component while maintaining ±22mV accuracy across temperature. | Use Scenario: Detecting environmental sensor thresholds (e.g., temperature crossing 37.5°C) in wireless patient monitors transmitting data over BLE. IC Role / Device Role / Timing Role: Low-power threshold discriminator generating interrupt signal to wake microcontroller from deep sleep. Use Value: 600nA quiescent current enables >5 years of operation on CR2032; open-drain output interfaces directly with 1.8V MCU GPIO. |
| Medical Instrument Sensing | Logic-Level Translation |
Use Scenario: Ground-referenced ECG lead-off detection where electrode voltage must be compared against 0V reference with sub-mV hysteresis. IC Role / Device Role / Timing Role: Precision comparator with VEE = 0V, using IN− tied to GND and IN+ sensing electrode; internal hysteresis prevents false triggers. Use Value: Input range extending to −0.2V enables reliable detection of negative-going artifacts without clamping diodes or bias networks. | Use Scenario: Converting 5V logic outputs from legacy peripherals to 3.3V-tolerant inputs on modern microcontrollers in portable ultrasound devices. IC Role / Device Role / Timing Role: Level translator with VCC = +5V and RPULLUP = 10kΩ to +3.3V - output swings from 0V to 3.3V regardless of VCC. Use Value: Open-drain architecture avoids shoot-through current and eliminates need for bidirectional level-shifter ICs or discrete MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDCKR | 320nA supply current, no internal reference, push-pull output, same SC70-5 package | Requires external reference and level-shifting for mixed-voltage use; unsuitable for direct REF-based battery monitoring | Select when lowest possible current is critical and system already provides reference; avoid if open-drain or integrated REF required. |
| MAX9119EXK+T | Same family, 350nA supply current, push-pull output, identical pinout but REF pin N.C. | Cannot replace MAX9118EXK+T in REF-dependent circuits; incompatible with open-drain bus wiring | Choose only if push-pull drive is needed and external reference is available; not a drop-in replacement due to output and REF pin differences. |
Compared with TLV3691IDCKR and MAX9119EXK+T, the MAX9118EXK+T uniquely combines ultra-low power, integrated reference, and open-drain output in SC70-5 - making it the sole option for self-contained, mixed-voltage, battery-monitoring comparators without layout changes.
Availability
MAX9118EXK+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, portable medical instrumentation, telemetry threshold detection, and low-power logic-level translation requiring stable component supply across industrial and medical OEM programs.
Supply support for MAX9118EXK+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 product line was designed specifically for ultra-low-power, battery-critical applications requiring precision threshold detection with minimal footprint and zero external reference components.
FAQ
What is the operating voltage range of the MAX9118EXK+T?
The MAX9118EXK+T operates from +1.6V to +5.5V supply voltage (VCC to VEE). It is fully specified over this range, including guaranteed functionality at the 1.6V minimum - enabling direct connection to two alkaline, NiMH, or lithium primary cells without regulation. The input common-mode range extends from VEE − 0.2V to VCC + 0.2V, supporting signals beyond the rails.
Does the MAX9118EXK+T require an external pull-up resistor on its output?
Yes, the MAX9118EXK+T features an open-drain output and requires an external pull-up resistor to establish a valid high logic level. The value of the pull-up resistor affects propagation delay: at VCC = +5V and RPULLUP = 100kΩ, tPD+ is 45µs; reducing RPULLUP to 10kΩ improves speed but increases static current. The output can be pulled up to any voltage ≤ +6V relative to VEE.
What is the accuracy and temperature drift of the internal reference in the MAX9118EXK+T?
The MAX9118EXK+T integrates a 1.252V reference with ±1.75% initial accuracy (±22mV) over −40°C to +85°C and a typical temperature coefficient of 100ppm/°C. This yields a maximum drift of ±8.5mV across the full temperature range, making it suitable for precision battery end-of-life detection where absolute voltage thresholds matter.
Can the MAX9118EXK+T be used for ground-referenced sensing applications?
Yes - with VEE tied to GND, the MAX9118EXK+T supports input voltages from −0.2V to VCC + 0.2V. This allows direct sensing of signals referenced to ground (e.g., thermistor dividers, battery terminals, or ECG electrodes) without level-shifting circuitry. The internal 1.252V reference is also referenced to VEE (GND), simplifying threshold generation.
How does the MAX9118EXK+T minimize supply-line disturbances during switching?
The MAX9118EXK+T employs a unique break-before-make output stage that virtually eliminates supply-current surges during output transitions. Unlike conventional comparators that draw orders-of-magnitude higher current while switching, the MAX9118EXK+T maintains near-constant 600nA supply current - reducing demand on decoupling capacitors and preventing supply glitches that could disrupt adjacent analog or RF circuitry.
MAX9118EXK+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:
- with Voltage Reference
- 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):
- 1.6µA
- Current - Quiescent (Max):
- 80dB PSRR
- CMRR, PSRR (Typ):
- 45µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SC-70-5
MAX9118EXK+T FAQ
1.How can I place an order for MAX9118EXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9118EXK+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 MAX9118EXK+T reliable?
The price and inventory of MAX9118EXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9118EXK+T is usually 5 days.
3.What payment methods are accepted for MAX9118EXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9118EXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9118EXK+T?
MAX9118EXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9118EXK+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 MAX9118EXK+T?
For technical support, including MAX9118EXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9118EXK+T requirements.
6.How does Aetrix verify that MAX9118EXK+T is sourced from the original manufacturer or authorized distributors?
All MAX9118EXK+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 MAX9118EXK+T meets industry standards.
7.What is the process for return or replacement of MAX9118EXK+T?
All MAX9118EXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9118EXK+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 MAX9118EXK+T part is unused and in its original packaging.
Return procedure for MAX9118EXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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