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Analog Devices Inc./Maxim Integrated MAX922CUA+T
- Part No.:
- MAX922CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX922CUA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,984
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Product details
Overview
MAX922CUA+T from Maxim Integrated is a dual ultra-low-power voltage comparator with no internal reference and no internal hysteresis, housed in an 8-pin μMAX package. It operates from a single +2.5V to +11V supply (or ±1.25V to ±5.5V dual supply), draws ≤4μA quiescent current over temperature, supports rail-to-rail input common-mode 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 portable instrumentation.
For engineers reviewing the MAX922CUA+T datasheet, MAX922CUA+T pinout, MAX922CUA+T application, or MAX922CUA+T equivalent, key selection criteria include its dual-comparator architecture without integrated reference, 12μs propagation delay at 10mV overdrive, 40mA continuous output source capability, and compatibility with single- or dual-supply configurations across industrial temperature range (0°C to +70°C).
Technical Context
The MAX922CUA+T implements two independent comparators with fully differential inputs, each supporting input voltages from V− to within 1.3V of V+. Its output stage eliminates crowbar current during transitions, minimizing supply-line parasitic feedback and enabling stable operation without strict layout constraints.
Unlike the MAX921/MAX923, it lacks an internal 1.182V reference and programmable HYST pin; hysteresis must be implemented externally via positive feedback. Output swing ranges from V+ to V−, requiring V− connection to ground for TTL-level compatibility in single-supply mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply - enables direct interface with Li-ion batteries and legacy bipolar systems |
| Quiescent Supply Current | ≤4μA over 0°C to +70°C - ensures multi-year operation on coin-cell batteries in always-on sensing nodes |
| Input Common-Mode Range | V− to (V+ − 1.3V) - supports detection of signals near supply rails without level-shifting circuitry |
| Propagation Delay | 12μs at 10mV overdrive - provides deterministic timing for precision window or zero-crossing detection |
| Output Drive Capability | Continuous 40mA source / >5mA sink - directly drives LEDs, small relays, or logic inputs without external buffers |
| Input Offset Voltage | ±10mV max - sets minimum detectable voltage difference in high-gain threshold applications |
| Input Leakage Current | ±5nA max (C/E temp range) - preserves accuracy in high-impedance sensor interfaces (e.g., photodiode, thermistor) |
Pinout & Package
MAX922CUA+T is packaged in an 8-pin μMAX (3mm × 3mm, 0.5mm pitch), pin-compatible with SO and DIP variants. The μMAX package enables high-density PCB layouts while maintaining thermal performance up to 330mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks/sources current between V+ and V− - connects directly to load or next-stage logic |
| 2 | V+ | Positive supply rail - accepts 2.5V–11V single or +5.5V max in dual-supply configuration |
| 3 | INB+ | Noninverting input of comparator B - referenced to V−; supports common-mode range down to V− |
| 4 | INB− | Inverting input of comparator B - matched to INB+ for precise differential comparison |
| 5 | INA− | Inverting input of comparator A - electrically isolated from INB−; enables independent dual-channel sensing |
| 6 | INA+ | Noninverting input of comparator A - identical electrical characteristics to INB+; supports rail-to-rail signal monitoring |
| 7 | V− | Negative supply terminal - tied to GND in single-supply use; defines output low level and input common-mode floor |
| 8 | OUTA | Comparator A output; identical drive strength and logic behavior to OUTB - allows synchronous dual-threshold decisions |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous high/low threshold detection or redundant signal validation in safety-critical systems |
| No crowbar output switching | Eliminates supply rail glitches during output transitions - reduces need for local bypass capacitors and simplifies EMI filtering |
| Rail-to-rail input common-mode range | Accepts input signals from V− to V+ − 1.3V - avoids external biasing networks for unipolar sensor outputs |
| TTL/CMOS-compatible outputs | Sinks and sources current to drive standard logic families directly - removes level-shifter ICs in mixed-voltage systems |
| Ultra-low 4μA quiescent current | Extends battery life in wireless sensor nodes and portable medical devices operating continuously for >5 years on CR2032 |
Applications
| Battery-Powered Threshold Detector | Window Comparator System |
|---|---|
Use Scenario: Monitoring lithium battery voltage to trigger low-battery warning and prevent deep discharge in handheld meters. IC Role / Device Role / Timing Role: Dual comparator independently compares cell voltage against upper (4.2V) and lower (3.0V) thresholds using resistor dividers. Use Value: Eliminates need for microcontroller ADC polling - reduces system power by >95% versus active sampling architectures. | Use Scenario: Validating regulated 5V supply integrity in industrial PLC I/O modules with undervoltage/overvoltage lockout. IC Role / Device Role / Timing Role: One comparator detects <4.75V (undervoltage), the other detects >5.25V (overvoltage); outputs ANDed to generate POWER_GOOD signal. Use Value: Provides sub-15μs response to supply faults - faster than microcontroller-based monitoring and immune to firmware hangs. |
| Oscillator Circuit with Hysteresis | Level-Shifting Interface |
Use Scenario: Building a relaxation oscillator for clock generation in ultra-low-power timing circuits (e.g., RTC backup). IC Role / Device Role / Timing Role: Comparator A forms hysteresis loop with RC network and feedback resistor; comparator B unused or disabled. Use Value: Achieves stable oscillation at <1μA total supply current - 10× lower than discrete transistor oscillator alternatives. | Use Scenario: Converting ±5V analog sensor outputs (e.g., strain gauge bridge) to 0V/5V logic levels for MCU GPIO input. IC Role / Device Role / Timing Role: Comparator A compares bipolar input against 0V reference; output swings 0V–5V compatible with 5V-tolerant MCU pins. Use Value: Supports direct interface without op-amp level shifters - cuts BOM cost and board area by 40% versus active solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | No internal reference; 1.0mV typical offset vs. ±10mV max for MAX922CUA+T; 500μA supply current vs. 4μA | Higher power consumption limits use in battery lifetime-critical designs; wider offset affects precision thresholding | Select when cost sensitivity outweighs micropower requirements and offset tolerance is relaxed |
| TLV3702IDR | Includes rail-to-rail input/output; 1.2μA supply current; no internal reference; 1.5mV max offset | Lower offset improves accuracy in precision sensing; smaller 8-pin SOIC package vs. μMAX footprint | Select when higher accuracy and smaller quiescent current are required, and μMAX package is not mandatory |
Compared with LM393DR and TLV3702IDR, MAX922CUA+T offers the lowest supply current among dual comparators with V−-referenced outputs and proven stability in high-impedance sensor interfaces - making it optimal for energy-harvesting and long-life battery systems where every nanoamp matters.
Availability
MAX922CUA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with guaranteed commercial-temperature performance (0°C to +70°C).
Supply support for MAX922CUA+T 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 communications markets.
The MAX921–MAX924 family was engineered specifically for ultra-low-power threshold detection in space-constrained, battery-operated equipment - emphasizing micropower operation, rail-to-rail inputs, and robust output drive without external components.
FAQ
What is the maximum supply voltage for MAX922CUA+T in single-supply operation?
The MAX922CUA+T supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains full specification compliance including input common-mode range (V− to V+ − 1.3V), output drive capability, and quiescent current ≤4μA across 0°C to +70°C. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Does MAX922CUA+T include an internal voltage reference?
No, MAX922CUA+T does not include an internal voltage reference. Unlike MAX921/MAX923, it lacks a REF pin and bandgap reference circuitry. External reference or resistor-divider networks must be used to establish comparison thresholds - providing design flexibility but requiring additional passive components.
Can MAX922CUA+T operate from a dual ±5V supply?
Yes, MAX922CUA+T operates from dual supplies ranging from ±1.25V to ±5.5V. With ±5V applied, V+ = +5V and V− = −5V, the output swings from +5V to −5V, enabling direct interface with bipolar analog signals and legacy industrial control systems without level-shifting circuitry.
What is the purpose of the V− pin on MAX922CUA+T?
The V− pin on MAX922CUA+T serves as the negative supply rail and defines the lower bound of both input common-mode range and output swing. In single-supply use, it is connected to GND; in dual-supply use, it connects to the negative rail. It also establishes the reference point for input signals and output low-level voltage - critical for accurate threshold detection in grounded or floating systems.
How is hysteresis implemented on MAX922CUA+T?
Hysteresis on MAX922CUA+T requires external positive feedback using two resistors per comparator, as described in Figure 4 of the datasheet. Since MAX922CUA+T lacks a HYST pin, hysteresis is added by connecting a resistor from output to noninverting input. This method increases design complexity versus MAX921/MAX923 but allows independent hysteresis tuning for each comparator in the MAX922CUA+T.
MAX922CUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- 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):
- 50mA
- Current - Output (Typ):
- 5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX922CUA+T FAQ
1.How can I place an order for MAX922CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922CUA+T 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 MAX922CUA+T reliable?
The price and inventory of MAX922CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922CUA+T is usually 5 days.
3.What payment methods are accepted for MAX922CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922CUA+T?
MAX922CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922CUA+T 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 MAX922CUA+T?
For technical support, including MAX922CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922CUA+T requirements.
6.How does Aetrix verify that MAX922CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX922CUA+T 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 MAX922CUA+T meets industry standards.
7.What is the process for return or replacement of MAX922CUA+T?
All MAX922CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX922CUA+T, 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 MAX922CUA+T part is unused and in its original packaging.
Return procedure for MAX922CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922CUA+T Tags
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