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Analog Devices Inc./Maxim Integrated MAX9118EXK
- Part No.:
- MAX9118EXK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX9118EXK.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,608
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Product details
Overview
MAX9118EXK from Maxim Integrated is a nanopower, open-drain comparator with integrated 1.252V ±1.75% reference, guaranteed to operate from +1.6V to +5.5V supply, drawing only 600nA typical supply current, and featuring Beyond-the-Rails™ input range (VEE −0.2V to VCC +0.2V). It is designed for ultra-low-power battery-monitoring circuits where rail-to-rail input capability and minimal quiescent current are critical.
For engineers reviewing the MAX9118EXK datasheet, MAX9118EXK pinout, MAX9118EXK application, or MAX9118EXK equivalent, key selection considerations include its open-drain output architecture enabling mixed-voltage logic interfacing, internal reference accuracy over temperature, propagation delay vs. pull-up resistance, leakage-limited load drive, and SC70-5 package constraints for space-constrained portable designs.
Technical Context
The MAX9118EXK implements a crowbar-current-free switching output stage that eliminates supply glitches during transitions, making it suitable for noise-sensitive analog front-ends in battery-powered telemetry. Its input stage supports common-mode voltages beyond supply rails by ±200mV, and internal hysteresis of 4mV ensures clean switching without external components.
This device integrates a PNP emitter-follower reference (120nA bias) with 100ppm/°C TC and 200kΩ output impedance - optimized for low-leakage bypassing but requiring buffering for >10nA loads. The open-drain output is rated for VO ≤ +6V (relative to VEE), supporting level translation up to 3.3V/5V mixed-supply systems.
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 (ICC) | 600nA typ at +5V - extends battery life in always-on monitoring applications beyond 2.5 million hours on AA alkaline (per datasheet Table 1). |
| Input Common-Mode Range | VEE −0.2V to VCC +0.2V - allows sensing at ground or supply rail without level-shifting circuitry. |
| Reference Voltage | 1.252V ±1.75% (−40°C to +85°C) - provides stable threshold for battery voltage detection with <25mV total error budget. |
| Output Type | Open-drain - permits wired-OR logic, I²C-compatible bus sharing, and flexible pull-up to higher/lower voltage domains. |
| Propagation Delay (tPD+) | 45µs max with 100kΩ pull-up at +5V - defines minimum response time for slow-varying battery thresholds. |
| Output Leakage (ILEAK) | 1µA max at VO = 5.5V - limits false triggering in high-impedance pull-up configurations. |
Pinout & Package
The MAX9118EXK 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 exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Open-drain output - requires external pull-up; sinks up to 5mA; must not be shorted to VCC without current limiting. |
| 2 | VEE | Negative supply (typically GND) - reference point for IN−, REF, and output low state. |
| 3 | IN+ | Noninverting input - accepts signals up to VEE −0.2V or VCC +0.2V; bias current <2nA. |
| 4 | REF | Internal 1.252V reference output - high-impedance node; bypass with ≤1nF low-leakage capacitor if used. |
| 5 | VCC | Positive supply - powers comparator core and reference; PSRR = 1mV/V ensures stability under supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Enables direct sensing of battery voltage at VEE or VCC without resistive dividers or clamping diodes. |
| Ultra-low 600nA supply current | Reduces average power to <3µW at +3V - critical for multi-year coin-cell or energy-harvesting deployments. |
| Integrated 1.252V ±1.75% reference | Eliminates external precision reference IC or resistor divider, reducing BOM count and layout area in compact battery monitors. |
| Open-drain output with 6V abs max rating | Supports bidirectional level translation between 1.8V, 3.3V, and 5V domains without additional transistors or translators. |
| Internal 4mV hysteresis | Prevents chatter on noisy or slowly ramping battery signals - no external feedback components required for basic threshold detection. |
Applications
| 2-Cell Battery Monitoring | Ultra-Low-Power Telemetry |
|---|---|
Use Scenario: Monitoring voltage decay across two series alkaline cells in a remote sensor node powered by AA batteries. IC Role / Device Role / Timing Role: Comparator compares cell voltage against internal 1.252V reference to trigger low-battery alert when voltage drops below 1.8V/cell. Use Value: 600nA quiescent current enables >2.5 million hours of operation per AA pair (per datasheet Table 1), minimizing field maintenance. | Use Scenario: Detecting wake-up events (e.g., door opening, temperature threshold breach) in a battery-powered IoT endpoint. IC Role / Device Role / Timing Role: Acts as a low-power window comparator front-end, driving MCU interrupt pin via open-drain output pulled to 3.3V. Use Value: Beyond-the-Rails™ inputs allow direct connection to mechanical switch or thermistor network without level shifters or supply rails. |
| Medical Instrument Sensing | Mixed-Voltage Logic Translation |
Use Scenario: Threshold detection of ECG electrode offset or battery status in a portable diagnostic device. IC Role / Device Role / Timing Role: Compares analog sensor output against internal reference to flag out-of-range conditions with hysteresis. Use Value: Internal hysteresis (4mV) suppresses noise-induced false triggers in low-amplitude biomedical signals without added RC filtering. | Use Scenario: Converting 5V microcontroller GPIO outputs to 3.3V logic levels for interfacing with low-voltage peripherals. IC Role / Device Role / Timing Role: Open-drain output pulled to 3.3V performs level translation while isolating 5V domain from 3.3V domain. Use Value: Eliminates need for discrete MOSFET translator or dedicated level shifter IC, saving PCB area and cost in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9117EXK-T | Push-pull output; same 600nA ICC and 1.252V reference; identical SC70-5 package. | Requires no external pull-up; unsuitable for wired-OR or mixed-voltage buses. | Select when driving CMOS inputs directly or when minimizing external components is prioritized over bus flexibility. |
| TLV3691IDCKR | 600nA ICC, 1.2V reference, push-pull output, SOT-23-5; no Beyond-the-Rails™ input (CMVR = 0.1V to VCC −0.1V). | Lacks rail-to-rail input capability; cannot sense at ground or supply without external biasing. | Select only if input signals remain strictly within supply rails and board space allows SOT-23 instead of SC70. |
Compared with MAX9117EXK-T, MAX9118EXK offers bus-sharing capability at the cost of external pull-up; compared with TLV3691IDCKR, it delivers true rail-to-rail input operation essential for battery terminal sensing - a functional distinction not recoverable via external circuitry.
Availability
MAX9118EXK is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and medical instrument sensing requiring stable component supply across extended production lifecycles.
Supply support for MAX9118EXK 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX9117–MAX9120 family was designed specifically for nanopower battery monitoring and threshold detection in space-constrained, long-life portable equipment - emphasizing sub-1µA operation, rail-exceeding inputs, and integrated references.
FAQ
What is the maximum allowable voltage on the MAX9118EXK OUT pin?
The MAX9118EXK OUT pin is rated for absolute maximum voltage of +6V relative to VEE. This allows safe interfacing with 3.3V, 5V, or even 6V logic domains using an external pull-up resistor. Exceeding this voltage risks permanent damage to the output transistor, regardless of whether the device is powered or unpowered.
Can the internal reference of the MAX9118EXK drive a 10kΩ load?
No - the MAX9118EXK internal 1.252V reference has a typical output impedance of 200kΩ and is specified for loads drawing ≤10nA. Driving a 10kΩ load would cause >120mV error (1.252V / 10kΩ = 125µA >> 10nA), violating reference accuracy. Use a low-input-bias op amp (e.g., MAX4162) to buffer the REF pin for such loads.
Does the MAX9118EXK require power-supply bypass capacitors?
Power-supply bypass capacitors are not strictly required due to the MAX9118EXK's crowbar-current-free output design, which minimizes supply transients. However, a 100nF ceramic capacitor placed close to VCC and VEE pins is recommended when supply impedance is high, leads are long, or system noise exceeds 10mVpp - per Maxim's Board Layout guidance.
How does the MAX9118EXK behave when input voltages exceed the supply rails?
The MAX9118EXK input stage includes ESD protection diodes that forward-bias when IN+ or IN− exceeds VEE −0.2V or VCC +0.2V. Within the Absolute Maximum Ratings (±0.3V beyond rails), this is safe and enables true Beyond-the-Rails™ operation. Sustained overvoltage beyond ±0.3V risks latch-up or permanent damage.
Is the MAX9118EXK pin-compatible with the MAX9119EXK-T?
No - the MAX9118EXK (with reference, open-drain) and MAX9119EXK-T (no reference, push-pull) share the same SC70-5 package and pinout, but Pin 4 is REF on MAX9118EXK and NC on MAX9119EXK. Connecting a MAX9119EXK-T into a MAX9118EXK footprint leaves REF unconnected (harmless), but using MAX9118EXK in a MAX9119EXK design connects REF to an unused net - potentially loading the reference if externally biased.
MAX9118EXK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Bulk
- 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):
- 1.3µA
- Current - Quiescent (Max):
- 66dB CMRR, 40dB PSRR
- CMRR, PSRR (Typ):
- 14µs (Typ)
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SC-70-5
MAX9118EXK FAQ
1.How can I place an order for MAX9118EXK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9118EXK 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 reliable?
The price and inventory of MAX9118EXK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9118EXK is usually 5 days.
3.What payment methods are accepted for MAX9118EXK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9118EXK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9118EXK?
MAX9118EXK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9118EXK 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?
For technical support, including MAX9118EXK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9118EXK requirements.
6.How does Aetrix verify that MAX9118EXK is sourced from the original manufacturer or authorized distributors?
All MAX9118EXK 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 meets industry standards.
7.What is the process for return or replacement of MAX9118EXK?
All MAX9118EXK units undergo pre-shipment inspection (PSI). If there is an issue with MAX9118EXK, 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 part is unused and in its original packaging.
Return procedure for MAX9118EXK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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