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Analog Devices Inc./Maxim Integrated MAX922MSA/PR
- Part No.:
- MAX922MSA/PR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX922MSA/PR.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,690
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Product details
Overview
The MAX922MSA/PR from Maxim Integrated is a dual ultra-low-power comparator with no internal voltage reference and no internal hysteresis, housed in an 8-pin SO package and rated for operation from –55°C to +125°C. It draws ≤4 μA supply current over temperature, supports single-supply operation from +2.5V to +11V (or dual ±1.25V to ±5V), features rail-to-rail input range (V– to V+ – 1.3V), and delivers TTL/CMOS-compatible outputs that both sink and source current - ideal for battery-powered threshold detection in harsh-environment industrial sensors.
For engineers reviewing the MAX922MSA/PR datasheet, MAX922MSA/PR pinout, MAX922MSA/PR application, or MAX922MSA/PR equivalent, this page provides verified functional specifications, validated pin-level circuit roles, confirmed operating conditions across military temperature range, and two rigorously cross-referenced alternative parts for dual-comparator low-power designs.
Technical Context
The MAX922MSA/PR implements two independent micropower comparators with a unique output stage capable of continuous 40 mA sourcing and >5 mA sinking while maintaining sub-4 μA quiescent current. Its input common-mode range extends from V– to within 1.3 V of V+, enabling direct sensing near supply rails without level-shifting.
Unlike MAX921/MAX923, it omits internal reference and HYST pin - requiring external reference and optional positive-feedback hysteresis. Output swing is from V+ to V–, necessitating V– connection to GND for TTL compatibility in single-supply +5 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5V dual supply - supports wide-input industrial power rails and legacy bipolar systems. |
| Quiescent Supply Current | ≤4 μA over –55°C to +125°C - enables multi-year operation on coin-cell batteries in remote monitoring nodes. |
| Input Common-Mode Range | V– to (V+ – 1.3V) - allows direct interface with signals referenced to negative rails or ground without attenuation. |
| Propagation Delay | 12 μs at 10 mV overdrive - ensures timely response in precision window-detection and oscillator timing loops. |
| Output Drive Capability | Sources ≥40 mA continuously; sinks ≥5 mA - directly drives LEDs, small relays, or logic inputs without external buffers. |
| Input Offset Voltage | ±10 mV max - sets minimum detectable differential for low-level analog thresholds (e.g., thermistor zero-crossing). |
| Input Leakage Current | ±5 nA max (C/E temp), ±40 nA max (M temp) - preserves accuracy in high-impedance sensor interfaces like photodiode amplifiers. |
Pinout & Package
MAX922MSA/PR uses an 8-pin SO (Small Outline) package, pin-compatible with industry-standard SOIC-8 footprints and qualified for extended military temperature operation (–55°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output: actively drives high (to V+) or low (to V–); connects to load or next-stage logic. |
| 2 | V+ | Positive supply rail: accepts +2.5V to +11V (single) or +1.25V to +5V (dual positive rail). |
| 3 | INB+ | Noninverting input of comparator B: accepts signal up to V+ – 1.3V; high-impedance (±5 nA leakage). |
| 4 | INB– | Inverting input of comparator B: same voltage range and impedance as INB+; forms differential pair with INB+. |
| 5 | INA– | Inverting input of comparator A: electrically identical to INB–; isolated from comparator B inputs. |
| 6 | INA+ | Noninverting input of comparator A: matches INB+ specs; enables independent dual-threshold configuration. |
| 7 | V– | Negative supply rail: connects to GND in single-supply mode; defines lower output swing limit and input common-mode floor. |
| 8 | OUTA | Comparator A output: fully independent of OUTB; shares same sourcing/sinking capability and logic swing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤4 μA over full –55°C to +125°C range - eliminates thermal drift concerns and enables energy harvesting compatibility. |
| Rail-to-rail input capability | V– to V+ – 1.3V input range - eliminates need for external biasing resistors in single-supply sensor front-ends. |
| High-output drive strength | 40 mA continuous source / 5 mA sink - replaces discrete transistor drivers in LED indicators and solenoid control. |
| No crowbar current during switching | Eliminates supply-line glitches - prevents false triggering in adjacent analog circuits without mandatory bypass capacitors. |
| Dual independent comparators | Separate IN+/IN– and OUT pins per channel - supports simultaneous high/low threshold detection (e.g., window comparators). |
Applications
| Battery-Powered Threshold Detector | Industrial Window Comparator |
|---|---|
|
Use Scenario: Detecting low-battery condition (<3.0 V) and overvoltage (>4.2 V) in portable medical devices using a single Li-ion cell. IC Role / Device Role / Timing Role: Dual comparator performing independent rising-edge (overvoltage) and falling-edge (undervoltage) detection on shared input via resistor divider. Use Value: Eliminates need for external reference or hysteresis components; operates reliably at <4 μA, extending battery life beyond 5 years in standby. |
Use Scenario: Monitoring 24 V DC bus in factory automation for safe operating window (21 V to 27 V) with fault latching. IC Role / Device Role / Timing Role: Two comparators configured as upper and lower threshold detectors feeding SR latch; V– tied to system ground. Use Value: Withstands –55°C cold storage and +125°C cabinet environments; rail-to-rail inputs interface directly to scaled-down bus voltage. |
| Oscillator Circuit | Level-Shifting Interface |
|
Use Scenario: Building relaxation oscillator for watchdog timer clock generation in aerospace avionics. IC Role / Device Role / Timing Role: One comparator used in hysteresis-based RC oscillator; second comparator reserved for fault flag monitoring. Use Value: 12 μs propagation delay ensures stable oscillation period control; 40 mA output drives capacitor charging directly. |
Use Scenario: Converting ±5 V analog sensor outputs (e.g., strain gauge bridge) to 0 V/5 V logic levels for microcontroller ADC input. IC Role / Device Role / Timing Role: Comparator A compares signal vs. 0 V reference; comparator B validates polarity with separate threshold. Use Value: Input range includes negative rail - accepts –5 V directly without clamping diodes or level-shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393AMX/NOPB | Higher 100 μA supply current; no rail-to-rail inputs; open-collector outputs only - requires pull-up resistors and external reference. | Not suitable for ultra-low-power or rail-sensing applications; limited to commercial temperature range (0°C to +70°C). | Select when cost sensitivity outweighs power/performance needs and design already uses pull-ups and external references. |
| TLV3702IDR | Lower 850 nA quiescent current; rail-to-rail inputs/outputs; built-in 1.2 V reference - but rated only to +125°C (no –55°C spec). | Valid for high-reliability +125°C use cases, but not for extended cold environments like outdoor base stations or automotive under-hood. | Prefer for new designs targeting lowest possible power in non-military temperature ranges; verify reference routing for noise immunity. |
Compared with LM393AMX/NOPB and TLV3702IDR, the MAX922MSA/PR uniquely balances ultra-low μA-level power, military-grade temperature resilience, rail-sensing capability, and push-pull output drive - making it irreplaceable in long-life, wide-temperature, self-contained threshold detection systems.
Availability
MAX922MSA/PR is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor nodes, aerospace subsystem monitoring, and automotive body-control modules requiring stable component supply across extreme temperature cycles.
Supply support for MAX922MSA/PR 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 demanding industrial, automotive, and communications applications.
The MAX921–MAX924 family was engineered specifically for micropower threshold detection in resource-constrained, wide-temperature environments - prioritizing supply current, input range, and output drive over speed or integration density.
FAQ
What is the maximum supply voltage for MAX922MSA/PR in single-supply operation?
The MAX922MSA/PR supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains ≤4 μA quiescent current and full functionality across its –55°C to +125°C rating. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Does MAX922MSA/PR include an internal voltage reference?
No, the MAX922MSA/PR does not include an internal voltage reference. Unlike MAX921/MAX923, it lacks REF and HYST pins. External reference circuitry must be provided for precise threshold setting - a deliberate design choice to reduce die area and maximize flexibility in dual-comparator configurations.
Can MAX922MSA/PR operate from a dual ±5V supply?
Yes, MAX922MSA/PR operates from dual supplies ranging from ±1.25V to ±5V. Its outputs swing from V+ to V–, and inputs accept signals from V– to V+ – 1.3V. For ±5V operation, connect V– to –5V and V+ to +5V; no GND connection is required.
What is the purpose of the V– pin on MAX922MSA/PR?
The V– pin on MAX922MSA/PR serves as the negative supply rail and defines the lower bound of both input common-mode range and output swing. In single-supply operation, it must be connected to system ground. In dual-supply mode, it connects to the negative rail (e.g., –5V), enabling true bipolar signal handling.
How does MAX922MSA/PR achieve immunity to parasitic feedback during output transitions?
The MAX922MSA/PR eliminates crowbar (shoot-through) current in its output stage during logic transitions. This prevents momentary supply-line disturbances that could couple into sensitive analog inputs - a key reason why no power-supply bypass capacitors are strictly required, even in compact PCB layouts.
MAX922MSA/PR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 3.2µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX922MSA/PR FAQ
1.How can I place an order for MAX922MSA/PR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922MSA/PR 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 MAX922MSA/PR reliable?
The price and inventory of MAX922MSA/PR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922MSA/PR is usually 5 days.
3.What payment methods are accepted for MAX922MSA/PR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922MSA/PR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922MSA/PR?
MAX922MSA/PR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922MSA/PR 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 MAX922MSA/PR?
For technical support, including MAX922MSA/PR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922MSA/PR requirements.
6.How does Aetrix verify that MAX922MSA/PR is sourced from the original manufacturer or authorized distributors?
All MAX922MSA/PR 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 MAX922MSA/PR meets industry standards.
7.What is the process for return or replacement of MAX922MSA/PR?
All MAX922MSA/PR units undergo pre-shipment inspection (PSI). If there is an issue with MAX922MSA/PR, 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 MAX922MSA/PR part is unused and in its original packaging.
Return procedure for MAX922MSA/PR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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