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Analog Devices Inc./Maxim Integrated MAX9117ESA+
- Part No.:
- MAX9117ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9117ESA+.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,259
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Product details
Overview
MAX9117ESA+ from Analog Devices is a nanopower, rail-to-rail input comparator with integrated 1.252V ±1.75% reference, push-pull output, 600nA supply current at 1.6V, and guaranteed operation from –40°C to +85°C. It enables ultra-low-power 2-cell battery monitoring in space-constrained portable systems.
For engineers reviewing the MAX9117ESA+ datasheet, MAX9117ESA+ pinout, MAX9117ESA+ application, or MAX9117ESA+ equivalent, this page delivers verified specifications, SO-8 package layout, real-world use cases in battery management and threshold detection, and validated alternative options for low-voltage comparator selection.
Technical Context
The MAX9117ESA+ employs a Beyond-the-Rails™ input stage extending 200mV beyond VEE and VCC, enabling sensing at ground or supply lines without level-shifting. Its internal hysteresis (4mV) ensures clean switching on slow-moving signals.
Its push-pull CMOS output delivers ±5mA drive capability with rail-to-rail swing, while its unique break-before-make output architecture minimizes supply-current surges-reducing power-supply glitches and eliminating need for large bypass capacitors in battery-powered designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - supports direct operation from single Li-ion or dual alkaline cells without regulation. |
| Supply Current | 600nA typical at +1.6V - enables multi-year battery life in always-on telemetry and remote sensors. |
| Reference Voltage | 1.252V ±1.75% - precision internal reference eliminates external voltage source and reduces BOM count. |
| Input Offset Voltage | 1mV typical, 10mV max over temperature - ensures accurate threshold detection across industrial temperature range. |
| Propagation Delay | 15µs (low-to-high), 14µs (high-to-low) at +5V - sufficient speed for battery voltage monitoring and wake-up event detection. |
| Output Drive | ±5mA rail-to-rail push-pull - directly interfaces with logic inputs or LED indicators without external buffers. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - enables ground-referenced or supply-referenced sensing without external resistive dividers. |
Pinout & Package
MAX9117ESA+ is housed in an 8-pin SO (Small Outline) package (PKG CODE S8-2), RoHS-compliant, with 1.27mm pitch and 4.9mm × 6.0mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | N.C. | No internal connection - left unconnected; no routing or termination required. |
| 2 | IN− | Inverting input - accepts analog signal for comparison against IN+ or internal reference. |
| 3 | IN+ | Noninverting input - used with REF (Pin 4) for fixed-threshold detection or with external signal for differential comparison. |
| 4 | REF | Internal 1.252V reference output - provides stable, temperature-compensated threshold; bypassable with low-leakage capacitor. |
| 6 | OUT | CMOS push-pull output - drives high/low actively; compatible with 3.3V/5V logic without pull-up resistor. |
| 7 | VCC | Positive supply - accepts +1.6V to +5.5V; powers both comparator core and reference circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Extends 200mV below VEE and above VCC - enables direct ground- or supply-line sensing without external level shifters. |
| Integrated 1.252V ±1.75% reference | Eliminates need for external reference IC or resistor divider - reduces component count and improves long-term stability. |
| Crowbar-current-free switching | Minimizes supply-current transients during output transitions - reduces EMI and avoids destabilizing shared battery rails. |
| Internal 4mV hysteresis | Prevents oscillation on noisy or slowly varying inputs - removes need for external positive feedback network in most applications. |
| Rail-to-rail push-pull output | Drives ±5mA with full swing from VEE to VCC - simplifies interface to microcontroller GPIOs or discrete load switches. |
Applications
| Battery Voltage Monitor | Low-Power Threshold Detector |
|---|---|
|
Use Scenario: Monitoring voltage of two alkaline cells (1.8V–3.0V) in a wireless sensor node to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Comparator compares cell voltage against internal 1.252V reference scaled by resistor divider to detect <2.2V threshold. Use Value: 600nA quiescent current extends battery life beyond 5 years in sleep mode; Beyond-the-Rails™ input allows direct connection to battery stack. |
Use Scenario: Detecting when a medical instrument's supply rail drops below safe operating level during battery backup switchover. IC Role / Device Role / Timing Role: Compares regulated 3.3V rail against internal reference to assert fault flag within 15µs of undervoltage condition. Use Value: Push-pull output drives microcontroller interrupt pin directly; no pull-up needed - saves board space and leakage path. |
| Telemetry Wake-Up Circuit | Ground-Referenced Sensor Interface |
|
Use Scenario: Enabling periodic wake-up of an environmental logger powered by coin cell, triggered by thermistor voltage crossing preset threshold. IC Role / Device Role / Timing Role: Uses IN+ tied to thermistor divider and IN− grounded; internal hysteresis prevents chatter during slow temperature drift. Use Value: 1.6V minimum supply allows operation down to end-of-life battery voltage; ultra-low ICC preserves charge between sampling intervals. |
Use Scenario: Converting output of a current-sense amplifier referenced to system ground into digital alert for overcurrent protection. IC Role / Device Role / Timing Role: IN− connected to ground, IN+ receives amplified sense voltage; REF pin supplies precise 1.252V trip point. Use Value: Input common-mode range includes VEE − 0.2V - permits direct ground-referenced input without level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDBVR | 320nA supply current, no internal reference, SC70-5 package, 1.8V min supply | Lacks integrated reference; requires external voltage source or resistor divider for threshold setting | Select when lowest possible ICC is critical and reference can be supplied externally |
| MAX9119EXK+T | 350nA supply current, same pin-compatible SO-8 footprint, no internal reference, push-pull output | Same family architecture but omits reference - reduces cost and ICC where external reference exists | Select when existing system already provides stable reference voltage and ultra-low ICC is prioritized |
Compared with TLV3691IDBVR and MAX9119EXK+T, the MAX9117ESA+ trades 250nA higher ICC for integrated 1.252V reference - reducing design complexity, PCB area, and long-term drift risk in standalone battery-monitoring functions.
Availability
MAX9117ESA+ is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and medical instrument safety interlocks requiring stable component supply across extended production lifecycles.
Supply support for MAX9117ESA+ 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 MAX9117ESA+ belongs to the MAX9117–MAX9120 nanopower comparator family, designed specifically for energy-constrained, battery-operated systems requiring precision threshold detection with minimal quiescent power.
FAQ
What is the minimum operating voltage for the MAX9117ESA+?
The MAX9117ESA+ is guaranteed to operate down to +1.6V over the full –40°C to +85°C temperature range. At 1.6V supply, it maintains 600nA typical supply current and full functionality of its internal 1.252V reference and push-pull output stage - making it ideal for end-of-life battery monitoring in dual-cell alkaline or NiMH systems.
Does the MAX9117ESA+ require external hysteresis for stable operation?
No. The MAX9117ESA+ includes 4mV of internal hysteresis, which prevents oscillation on slow or noisy input signals without external components. This built-in hysteresis is sufficient for most battery voltage monitoring and threshold-detection applications. External hysteresis may be added only if wider trip bands are required.
Can the REF pin of the MAX9117ESA+ drive a 10kΩ load?
No. The internal reference has a typical output impedance of 200kΩ and is not designed to drive loads below ~100kΩ. Driving a 10kΩ load would cause significant voltage droop and error. For such loads, buffer the REF pin with a low-input-bias-current op amp like the MAX4162, or use the reference only for high-impedance divider networks.
Is the MAX9117ESA+ pin-compatible with other devices in the MAX9117–MAX9120 family?
Yes - the MAX9117ESA+ shares identical SO-8 pinout (S8-2 package) with MAX9120ESA+, including N.C. pins at positions 1, 5, and 8. However, MAX9117ESA+ features push-pull output and internal reference, whereas MAX9120ESA+ has open-drain output and no reference - functional compatibility requires circuit-level verification.
What is the maximum capacitive load the MAX9117ESA+ output can drive?
The MAX9117ESA+ push-pull output is characterized up to 15pF load capacitance in propagation delay specs. While it can drive larger loads, rise/fall times increase linearly with capacitance - e.g., tRISE increases from 1.6µs (15pF) to ~20µs at 1000pF. For loads >50pF, add series resistance near the output to prevent ringing and ensure stability.
MAX9117ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- Beyond-the-Rails™
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.65V ~ 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):
- 40µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX9117ESA+ FAQ
1.How can I place an order for MAX9117ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9117ESA+ 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 MAX9117ESA+ reliable?
The price and inventory of MAX9117ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9117ESA+ is usually 5 days.
3.What payment methods are accepted for MAX9117ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9117ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9117ESA+?
MAX9117ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9117ESA+ 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 MAX9117ESA+?
For technical support, including MAX9117ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9117ESA+ requirements.
6.How does Aetrix verify that MAX9117ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX9117ESA+ 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 MAX9117ESA+ meets industry standards.
7.What is the process for return or replacement of MAX9117ESA+?
All MAX9117ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9117ESA+, 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 MAX9117ESA+ part is unused and in its original packaging.
Return procedure for MAX9117ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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