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Analog Devices Inc./Maxim Integrated MAX920ESA+
- Part No.:
- MAX920ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX920ESA+.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
MAX920ESA+ from Maxim Integrated is a nanopower, open-drain output comparator in an 8-pin SO package, guaranteed to operate from +1.8V to +5.5V supply, with 380nA supply current, Beyond-the-Rails™ input range (VEE − 0.2V to VCC + 0.2V), and 4mV internal hysteresis - designed for ultra-low-power 2-cell battery monitoring and mixed-voltage logic-level translation.
For engineers reviewing the MAX920ESA+ datasheet, MAX920ESA+ pinout, MAX920ESA+ application, or MAX920ESA+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support for industrial and portable electronics design.
Technical Context
The MAX920ESA+ implements a rail-to-rail input stage with ±0.15nA typical input bias current and 1mV typical input offset voltage, enabling precise threshold detection at ground or supply-line sensing points. Its open-drain output supports pull-up to voltages up to +6V (relative to VEE), making it suitable for level-shifting between disparate supply domains.
Unlike push-pull comparators, the MAX920ESA+ avoids crowbar current during switching, limiting supply-current surges and eliminating supply glitches - critical for battery life in telemetry and medical instruments. It features internal hysteresis (4mV) and operates across −40°C to +85°C without phase reversal under overdriven inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 380nA at +1.8V - enables multi-year operation on coin cells or 2-cell alkaline batteries |
| Supply Voltage Range | +1.8V to +5.5V - supports direct interface with Li-ion, NiMH, and alkaline battery stacks |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows sensing at ground or supply rail without external resistive dividers |
| Output Type | Open-drain - enables wire-OR logic, mixed-voltage level translation (e.g., 5V → 3V), and flexible pull-up configuration |
| Input Offset Voltage | 1mV (typ), 5mV (max) - ensures accurate threshold detection in precision battery voltage monitoring |
| Hysteresis | 4mV (typ) - suppresses noise-induced oscillation on slow-moving signals like battery discharge curves |
| Propagation Delay | 35µs (low-to-high, VCC = 5V, RPULLUP = 100kΩ) - balances speed and power for low-frequency event detection |
Pinout & Package
MAX920ESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with 1.27mm lead pitch and standard JEDEC MS-012AC outline. Thermal performance supports continuous operation at +85°C ambient with ≤471mW derated power dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection | Not internally bonded - must be left floating or grounded per layout best practice; no electrical function |
| 2 | IN− | Inverting input - accepts signals down to VEE − 0.2V; used with IN+ for differential threshold comparison |
| 3 | IN+ | Noninverting input - supports Beyond-the-Rails™ operation; primary signal input for zero-crossing or voltage monitoring |
| 4 | VEE | Negative supply - typically GND (0V); defines lower reference for input common-mode and output swing |
| 5 | VCC | Positive supply - powers internal circuitry; range +1.8V to +5.5V; bypass capacitor recommended if supply impedance >1Ω |
| 6 | OUT | Open-drain output - requires external pull-up; sinks up to 8mA; supports absolute output voltage up to VEE + 6V |
| 7 | No Connection | Not internally bonded - electrically isolated; no routing or connection required |
| 8 | No Connection | Not internally bonded - unused pad; may be tied to ground for thermal relief but has no functional role |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 380nA supply current | Extends battery life beyond 2.5 million hours (≈285 years) at 1.8V in standby - ideal for maintenance-free remote sensors |
| Beyond-the-Rails™ input range | Enables direct ground-referenced sensing (e.g., battery cathode monitoring) without level-shifting circuitry or supply rails |
| Open-drain output with 6V absolute max rating | Permits safe interfacing with higher-voltage logic (e.g., 5V MCU I/O) while powered from 1.8V–3.3V supplies |
| Internal 4mV hysteresis | Eliminates need for external positive feedback resistors in most battery voltage monitor applications, reducing BOM count |
| No phase reversal under overdrive | Guarantees predictable output polarity even when inputs exceed common-mode limits - critical for fault-detection circuits |
Applications
| 2-Cell Battery Monitoring | Logic-Level Translation |
|---|---|
|
Use Scenario: Monitoring voltage decay across two alkaline or NiMH cells in portable medical devices to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Comparator senses cell voltage against fixed or scaled reference; open-drain output drives microcontroller interrupt pin. Use Value: 380nA quiescent current extends operational lifetime by >10× versus µA-range comparators; Beyond-the-Rails™ input eliminates need for resistor dividers on low-side sensing. |
Use Scenario: Converting 5V logic outputs from legacy controllers to 3V-compatible inputs on modern low-power SoCs in industrial gateways. IC Role / Device Role / Timing Role: MAX920ESA+ acts as unidirectional level shifter: VCC = 5V, pull-up to 3V, OUT drives 3V logic high/low. Use Value: Open-drain architecture prevents bus contention and overvoltage damage; 35µs propagation delay meets sub-30kHz control-loop timing requirements. |
| Telemetry Sensor Node | Medical Instrument Threshold Detection |
|
Use Scenario: Detecting temperature or pressure thresholds in battery-powered wireless sensor nodes deployed in remote infrastructure. IC Role / Device Role / Timing Role: Compares analog sensor output (e.g., thermistor divider) to stable trip point; triggers wake-up or transmission event. Use Value: 4mV internal hysteresis rejects EMI-induced noise without external components; 1.8V operation ensures compatibility with energy-harvesting power sources. |
Use Scenario: Detecting ECG signal zero-crossings or respiration belt deflection thresholds in portable diagnostic equipment. IC Role / Device Role / Timing Role: Zero-crossing detector (IN− = GND, IN+ = AC-coupled signal); output flags waveform transitions to MCU. Use Value: No phase reversal guarantees consistent edge polarity during signal overdrive; rail-to-rail input accommodates full-swing biopotential signals. |
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 |
|---|---|---|---|
| TLV3691IDBVR | 320nA supply current, 1.8V–5.5V, open-drain, but no Beyond-the-Rails™ input (CMVR = VEE to VCC − 0.1V) | Cannot sense below VEE or above VCC - unsuitable for ground-referenced battery cathode monitoring | Select only when input stays strictly within rails and lowest possible current is prioritized over input flexibility |
| MAX40002ANSR | 600nA supply current, 1.6V–5.5V, open-drain, Beyond-the-Rails™ input, but 10mV hysteresis (fixed, non-adjustable) | Higher hysteresis reduces resolution for fine-grained voltage monitoring (e.g., <10mV battery delta detection) | Prefer when wider hysteresis is acceptable to simplify noise immunity in high-EMI environments |
Compared with TLV3691IDBVR and MAX40002ANSR, the MAX920ESA+ uniquely combines 380nA current, true Beyond-the-Rails™ input, and 4mV hysteresis - delivering optimal trade-off for precision, ultra-low-power, rail-flexible sensing in space-constrained portable systems.
Availability
MAX920ESA+ is available at Aetrix Electronics and suitable for 2-cell battery monitoring, logic-level translation, telemetry sensor nodes, and medical instrument threshold detection requiring stable component supply and long-term obsolescence management.
Supply support for MAX920ESA+ 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 and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable electronics.
The MAX917–MAX920 family was engineered specifically for ultra-low-power, rail-flexible voltage comparison in battery-constrained systems - emphasizing nanopower operation, input robustness, and output versatility without sacrificing accuracy.
FAQ
What is the maximum allowable voltage on the MAX920ESA+ output pin?
The MAX920ESA+ output pin supports an absolute maximum voltage of VEE + 6V, independent of VCC. For example, with VEE = 0V and VCC = 1.8V, the output can be safely pulled up to 6V - enabling reliable 5V logic interfacing while operating from a 1.8V supply. This rating is confirmed in the Absolute Maximum Ratings table and applies under all operating conditions for the MAX920ESA+.
Does the MAX920ESA+ include an internal voltage reference?
No, the MAX920ESA+ does not include an internal voltage reference. It belongs to the reference-less variant of the MAX917–MAX920 family (as indicated by "MAX920" designation and 380nA supply current spec). Reference functionality is exclusive to MAX917/MAX918 variants. The MAX920ESA+ requires an external reference or resistor-divider network for threshold setting.
Can the MAX920ESA+ operate from a single 1.8V supply?
Yes, the MAX920ESA+ is fully specified and guaranteed to operate from a single +1.8V supply (VCC = 1.8V, VEE = 0V) across the full −40°C to +85°C temperature range. Electrical Characteristics tables explicitly list parameters at VCC = 1.8V, including 380nA supply current, 4mV hysteresis, and 1mV input offset voltage - confirming robust functionality at minimum supply.
What is the purpose of the NC pins on the MAX920ESA+ 8-pin SO package?
The MAX920ESA+ 8-pin SO package has three No-Connection (NC) pins: Pin 1, Pin 7, and Pin 8. These pins are not internally bonded and serve no electrical function. They may be left unconnected, tied to ground for mechanical stability or thermal relief, but must never be used for signal routing or supply decoupling - as confirmed in the Pin Description table and Pin Configurations diagram for the MAX920ESA+.
How does the MAX920ESA+ prevent supply glitches during output switching?
The MAX920ESA+ employs a unique break-before-make output stage that minimizes supply-current surges during transitions - reducing dynamic current spikes to near steady-state levels. This design virtually eliminates supply rail disturbances, decreasing or eliminating the need for large bypass capacitors and extending battery life in portable systems, as validated in the Typical Operating Characteristics (Figure MAX917-920 toc05/toc06) for the MAX920ESA+.
MAX920ESA+ 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:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- 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):
- 1.2µA
- Current - Quiescent (Max):
- 66.02dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX920ESA+ FAQ
1.How can I place an order for MAX920ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX920ESA+ 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 MAX920ESA+ reliable?
The price and inventory of MAX920ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX920ESA+ is usually 5 days.
3.What payment methods are accepted for MAX920ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX920ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX920ESA+?
MAX920ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX920ESA+ 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 MAX920ESA+?
For technical support, including MAX920ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX920ESA+ requirements.
6.How does Aetrix verify that MAX920ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX920ESA+ 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 MAX920ESA+ meets industry standards.
7.What is the process for return or replacement of MAX920ESA+?
All MAX920ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX920ESA+, 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 MAX920ESA+ part is unused and in its original packaging.
Return procedure for MAX920ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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