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Analog Devices Inc./Maxim Integrated MAX917ESA+
- Part No.:
- MAX917ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX917ESA+.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,555
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Product details
Overview
MAX917ESA+ from Maxim Integrated is a nanopower, single-channel comparator with integrated 1.245V ±1.5% reference, Beyond-the-Rails™ input range (VEE −0.2V to VCC +0.2V), 750nA supply current at 1.8V–5.5V, and push-pull CMOS output capable of ±8mA drive. It operates from +1.8V minimum supply and is designed for ultra-low-power 2-cell battery monitoring and threshold detection.
For engineers reviewing the MAX917ESA+ datasheet, MAX917ESA+ pinout, MAX917ESA+ application, or MAX917ESA+ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-chain support tailored for battery-powered embedded systems.
Technical Context
The MAX917ESA+ integrates a precision PNP emitter-follower reference (1.245V, 95ppm/°C TC) and a rail-to-rail input stage with 4mV internal hysteresis-enabling clean switching on slow-moving signals without external components. Its break-before-make push-pull output eliminates crowbar current and supply glitches during transitions.
It supports operation across the full industrial temperature range (−40°C to +85°C), features no phase reversal under overdrive, and maintains stable 750nA ICC across 1.8V–5.5V supply while delivering rail-to-rail output swing into 8mA loads-critical for low-voltage sensing in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct use with 2-cell alkaline, NiMH, or Li-ion batteries without regulation. |
| Supply Current (ICC) | 750nA typical at +25°C - extends battery life beyond 2.5 million hours in AA-powered systems (per Table 1). |
| Input Offset Voltage (VOS) | 1mV (typ), 5mV (max) - ensures accurate threshold detection down to millivolt-level signal margins. |
| Reference Voltage (VREF) | 1.245V ±1.5% - provides stable, factory-trimmed reference for self-contained voltage monitoring without external components. |
| Input Common-Mode Range | VEE −0.2V to VCC +0.2V - allows sensing at ground or supply rail (e.g., battery cathode/anode monitoring) without level-shifting. |
| Output Drive Capability | ±8mA push-pull - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
| Propagation Delay (tPD+) | 30µs (typ, VCC = 1.8V) - sufficient for low-frequency battery voltage monitoring and wake-up event detection. |
Pinout & Package
MAX917ESA+ is housed in an 8-pin SO (Small Outline) package (Package Code S8+2), RoHS-compliant, with 1.27mm pitch and standard JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection (N.C.) | Not internally bonded - must be left floating or grounded per layout best practices; no electrical function. |
| 2 | VCC | Positive supply input (1.8V–5.5V); bypass with 100nF capacitor if supply impedance is high. |
| 3 | IN− / REF | Comparator inverting input AND internal 1.245V reference output - dual-function pin enabling compact reference-based comparator configurations. |
| 4 | IN+ | Noninverting input - accepts signals beyond rails (−0.2V to VCC+0.2V), ideal for ground-referenced sensor monitoring. |
| 6 | OUT | CMOS push-pull output - actively drives high/low; compatible with 1.8V/3.3V/5V logic families without pull-ups. |
| 7 | VEE | Negative supply (typically GND); forms return path for reference and output current. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ Input Stage | Accepts inputs 200mV below VEE or above VCC - enables direct sensing of battery terminals or rail voltages without external resistive dividers. |
| Integrated 1.245V Reference | ±1.5% initial accuracy, 95ppm/°C TC - eliminates need for external reference IC or precision resistor network in voltage-monitoring circuits. |
| Crowbar-Current-Free Switching | Break-before-make output architecture - prevents supply current spikes during transitions, reducing EMI and eliminating need for large bulk decoupling. |
| Internal 4mV Hysteresis | Guaranteed noise immunity for slow input signals - avoids oscillation near trip points without external positive feedback components. |
| Ultra-Low 750nA Supply Current | Stable across 1.8V–5.5V and −40°C to +85°C - enables multi-year operation on coin cells or AA batteries in maintenance-free IoT endpoints. |
Applications
| Battery Voltage Monitor | Low-Power Threshold Detector |
|---|---|
|
Use Scenario: Monitoring end-of-life voltage drop in 2-cell alkaline or NiMH battery packs for portable medical devices. IC Role / Device Role: Comparator compares battery voltage against internal 1.245V reference to trigger low-battery alert when VBAT falls below 2.4V. Use Value: Eliminates external reference and reduces BOM count by one component while maintaining ±1.5% trip accuracy across temperature. |
Use Scenario: Detecting ambient light level crossing a preset threshold using a photodiode amplifier output. IC Role / Device Role: Compares analog sensor output against fixed internal reference to generate digital wake-up signal for microcontroller. Use Value: 750nA quiescent current ensures sensor node remains operational >5 years on a single CR2032 cell. |
| Ground-Sense Telemetry | Medical Instrument Power Supervision |
|
Use Scenario: Measuring current through a shunt resistor placed at system ground to avoid high-side sensing complexity. IC Role / Device Role: IN+ connected to shunt low-side; IN−/REF used as stable reference; output flags overcurrent condition. Use Value: Input range extending 200mV below VEE (GND) allows accurate zero- and negative-volt sensing without level shifters. |
Use Scenario: Supervising backup battery voltage in infusion pumps to ensure fail-safe operation during main power loss. IC Role / Device Role: Monitors Li-ion backup cell voltage against 1.245V reference to assert reset or alert signal before critical undervoltage. Use Value: Guaranteed operation down to +1.8V and −40°C to +85°C rating meets IEC 60601-1 environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX918ESA+ | Same 8-pin SO package and pinout, but open-drain output and no internal reference; 750nA ICC. | Requires external pull-up and reference; suited for mixed-voltage logic interfacing (e.g., 5V comparator driving 3V MCU). | Select MAX918ESA+ only when open-drain output or absence of reference is required - not a drop-in replacement for reference-dependent circuits. |
| TLV3691IDBVR | Single nanopower comparator (320nA), 1.8V min, rail-to-rail input, push-pull output - but no integrated reference; SOT-23-5 package. | Lacks internal reference; requires external 1.24V source; smaller footprint but different pinout and no REF/IN− dual-function pin. | Choose TLV3691IDBVR for lowest ICC (320nA) where board space is critical and reference is already available elsewhere in system. |
Compared with MAX917ESA+, MAX918ESA+ retains identical packaging and supply current but removes the reference and changes output topology - limiting reuse in reference-based monitoring. TLV3691IDBVR offers lower ICC and smaller size but increases BOM count and layout complexity due to missing reference and incompatible pinout.
Availability
MAX917ESA+ is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power threshold detection, and medical instrument supervision requiring stable component supply across extended production lifecycles.
Supply support for MAX917ESA+ 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and portable applications.
The MAX917–MAX920 family was engineered specifically for nanopower, rail-aware sensing in battery-constrained systems - prioritizing sub-1µA ICC, Beyond-the-Rails™ input operation, and integrated reference stability over speed or drive strength.
FAQ
What is the operating voltage range for MAX917ESA+?
The MAX917ESA+ operates from a supply voltage of +1.8V to +5.5V, guaranteed over the full −40°C to +85°C temperature range. This range supports direct connection to common 2-cell battery sources (e.g., 2.4V–3.2V alkaline/NiMH) without regulation, and its Beyond-the-Rails™ inputs extend 200mV below VEE and above VCC - enabling robust sensing at battery terminals or ground-referenced nodes. The MAX917ESA+ maintains 750nA supply current across this entire voltage window.
Does MAX917ESA+ include an internal voltage reference?
Yes, the MAX917ESA+ integrates a precision 1.245V ±1.5% voltage reference, accessible at the IN− pin. This reference has a typical temperature coefficient of 95ppm/°C and is stable with any capacitive load. It eliminates the need for external reference ICs or resistor dividers in voltage-monitoring applications. The reference is implemented as a PNP emitter-follower driven by a 120nA current source, with ~200kΩ output impedance - sufficient for comparator biasing but requiring buffering for heavy loads. This feature is exclusive to MAX917/MAX918 variants.
What is the output configuration of MAX917ESA+?
The MAX917ESA+ features a CMOS push-pull output stage that actively sources and sinks current - unlike open-drain variants (e.g., MAX918). It delivers rail-to-rail output swing and can drive ±8mA loads directly. This configuration supports direct interfacing with 1.8V, 3.3V, or 5V logic families without external pull-up resistors. The output uses a break-before-make architecture to prevent crowbar current during transitions, minimizing supply glitches and reducing required decoupling capacitance - a key advantage in ultra-low-power battery systems.
How does the input stage of MAX917ESA+ handle signals beyond the supply rails?
The MAX917ESA+ employs a Beyond-the-Rails™ input stage that accepts common-mode voltages from VEE −0.2V to VCC +0.2V - meaning it can accurately compare signals 200mV below ground or 200mV above VCC. This capability is achieved via specialized input transistor design and internal ESD protection diodes that safely conduct when inputs exceed rails. It enables direct sensing of battery cathode/anode voltages, shunt-resistor ground-side measurements, or signals referenced to non-standard supplies - all without external level-shifting circuitry. No phase reversal occurs even under severe overdrive conditions.
What is the propagation delay and bandwidth limitation of MAX917ESA+?
The MAX917ESA+ has a typical low-to-high propagation delay (tPD+) of 30µs at VCC = 1.8V and 95µs at VCC = 5V (with 100mV overdrive and 15pF load). High-to-low delay (tPD−) is 35µs (1.8V) and 120µs (5V). These values reflect its nanopower optimization - trading speed for ultra-low ICC. The device is not intended for high-frequency signal comparison; rather, it targets DC and low-frequency events such as battery voltage drift, thermal threshold crossings, or wake-up triggers. Its usable bandwidth is limited to <1kHz under dynamic conditions, consistent with its 750nA supply current budget.
MAX917ESA+ 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:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 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):
- 95µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX917ESA+ FAQ
1.How can I place an order for MAX917ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX917ESA+ 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 MAX917ESA+ reliable?
The price and inventory of MAX917ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX917ESA+ is usually 5 days.
3.What payment methods are accepted for MAX917ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX917ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX917ESA+?
MAX917ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX917ESA+ 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 MAX917ESA+?
For technical support, including MAX917ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX917ESA+ requirements.
6.How does Aetrix verify that MAX917ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX917ESA+ 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 MAX917ESA+ meets industry standards.
7.What is the process for return or replacement of MAX917ESA+?
All MAX917ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX917ESA+, 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 MAX917ESA+ part is unused and in its original packaging.
Return procedure for MAX917ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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