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Analog Devices Inc./Maxim Integrated MAX922CUA
- Part No.:
- MAX922CUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX922CUA.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,535
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Product details
Overview
MAX922CUA from Maxim Integrated is a dual micropower comparator with no internal voltage 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 ±5V dual supply), draws ≤4μA quiescent current over temperature, supports rail-to-rail input common-mode range down to V− and up to V+ − 1.3V, and delivers TTL/CMOS-compatible outputs that source/sink current - ideal for battery-powered threshold detection in portable instrumentation.
For engineers reviewing the MAX922CUA datasheet, MAX922CUA pinout, MAX922CUA application, or MAX922CUA equivalent, key selection criteria include its dual-comparator architecture without integrated reference, output swing from V+ to V− (requiring V− connection for proper logic levels), ultra-low supply current across commercial temperature range (0°C to +70°C), and compatibility with single- or dual-supply configurations in space-constrained designs.
Technical Context
The MAX922CUA implements two independent comparators with matched input offset voltage (±10mV max) and ultra-low input leakage (±0.01nA typical at 25°C). Its output stage continuously sources up to 40mA while eliminating crowbar current during transitions, minimizing parasitic supply feedback and improving layout robustness.
Unlike MAX921/MAX923, it lacks HYST and REF pins - hysteresis must be implemented externally via positive feedback, and reference voltage must be supplied externally. Input common-mode range extends from V− to V+ − 1.3V, enabling direct sensing near supply rails in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply or ±1.25V to ±5V dual supply - supports both 3V/5V logic domains and bipolar signal monitoring. |
| Quiescent Supply Current | ≤4μA over 0°C to +70°C - enables multi-year operation on coin-cell batteries in always-on sensing nodes. |
| Input Offset Voltage | ±10mV max - ensures reliable 20mV threshold resolution without calibration in precision level-detection circuits. |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct interface to sensors operating near ground or rail, e.g., current-sense amplifiers. |
| Output Drive Capability | Sources ≥40mA, sinks ≥5mA - directly drives LEDs, small relays, or logic inputs without external buffers. |
| Propagation Delay | 12μs typical at 10mV overdrive - suitable for sub-10kHz window detection and oscillator timing applications. |
| Output Voltage Swing | V+ to V− (not GND-referenced) - requires explicit V− connection for correct logic thresholds in single-supply use. |
Pinout & Package
MAX922CUA is packaged in an 8-pin μMAX (3mm × 3mm, 0.5mm pitch), pin-compatible with industry-standard 8-pin SO and DIP footprints but with 55% smaller area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks and sources current between V+ and V− - connects directly to load without pull-up. |
| 2 | V+ | Positive supply rail; accepts +2.5V to +11V or +5V in dual-supply mode - bypassing recommended if supply impedance >1Ω. |
| 3 | INB+ | Noninverting input of comparator B; high-impedance (leakage <0.01nA) - interfaces directly to high-Z sensors or divider networks. |
| 4 | INB− | Inverting input of comparator B; identical electrical characteristics to INB+ - used for differential or single-ended threshold comparison. |
| 5 | INA− | Inverting input of comparator A; electrically isolated from INB− - enables independent dual-threshold detection. |
| 6 | INA+ | Noninverting input of comparator A; matches INB+ specs - supports separate reference or signal path for comparator A. |
| 7 | V− | Negative supply terminal; connect to GND for single-supply operation - defines output low-level and input lower bound. |
| 8 | OUTA | Comparator A output; identical drive strength and swing to OUTB - provides fully independent second decision channel. |
Key Features
| Feature | Design Value |
|---|---|
| No internal reference or hysteresis | Enables flexible external reference selection (e.g., precision bandgap or DAC) and application-specific hysteresis tuning via resistor networks. |
| 40mA continuous output source current | Drives LEDs, optocouplers, or MOSFET gates directly - eliminates need for discrete driver stages in low-power control circuits. |
| Crowbar-current-free output stage | Prevents supply-line transients during output transitions - improves noise immunity and simplifies PCB layout in mixed-signal systems. |
| Rail-to-rail input common-mode range | Accepts signals from V− to V+ − 1.3V - supports direct connection to shunt-based current monitors or thermistor dividers without level-shifting. |
| Ultra-low 4μA max supply current | Reduces battery drain to <35μAh/year - critical for maintenance-free IoT edge nodes and wearable health monitors. |
Applications
| Battery-Powered Threshold Detector | Window Comparator System |
|---|---|
|
Use Scenario: Monitoring lithium-ion cell voltage during charging to trigger cutoff at 4.2V and under-voltage lockout at 3.0V. IC Role / Device Role / Timing Role: Dual comparator performing independent high- and low-threshold decisions using externally generated reference voltages. Use Value: Eliminates external op-amps and reference ICs; single MAX922CUA replaces two discrete comparators with matched performance and shared supply current budget. |
Use Scenario: Detecting out-of-range analog sensor outputs (e.g., pressure transducer) in industrial controllers. IC Role / Device Role / Timing Role: Two comparators configured as upper- and lower-bound detectors with externally added hysteresis to prevent chatter near trip points. Use Value: Achieves <10μA total system quiescent current while maintaining 50mV hysteresis bandwidth - superior to standard comparators by 10× in power-sensitive PLC modules. |
| Oscillator Circuit Core | Level-Shifting Interface |
|
Use Scenario: Building a relaxation oscillator for clock generation in ultra-low-power microcontroller wake-up timers. IC Role / Device Role / Timing Role: One comparator functions as threshold detector in RC feedback loop; second comparator unused or reserved for fault flag. Use Value: Propagation delay stability (±1μs over temperature) and low supply current enable accurate 1–10Hz timing with <1% drift - no crystal required. |
Use Scenario: Converting ±5V industrial sensor outputs to 0V/5V logic levels for MCU ADC input protection. IC Role / Device Role / Timing Role: Comparator A compares sensor output against 0V reference; comparator B compares against 5V reference for direction detection. Use Value: Input common-mode range includes negative rail - accepts bipolar inputs without level-shifter ICs or resistive attenuators, reducing BOM count by 3 components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 100μA supply current, no rail-to-rail inputs, open-collector outputs requiring pull-ups. | Requires external pull-up resistors and consumes 25× more quiescent current - unsuitable for coin-cell lifetime targets. | Select MAX922CUA when battery life >5 years is required and board space is constrained; LM393DR only where cost per unit is below $0.08 and power is not limiting. |
| TLV3702IDR | Lower 850nA supply current, rail-to-rail inputs/outputs, but only 5mA output drive and no crowbar-free design. | Cannot drive LEDs or small relays directly; susceptible to supply bounce in noisy environments without careful decoupling. | Choose TLV3702IDR for nanoamp-level systems with light loads; MAX922CUA remains preferred for mixed-signal interfaces needing robust 40mA sourcing and glitch immunity. |
Compared with LM393DR and TLV3702IDR, the MAX922CUA uniquely balances ultra-low quiescent current (≤4μA), high-output drive (40mA), and crowbar-free switching - making it the only dual comparator capable of driving moderate loads while sustaining multi-year battery operation in compact industrial sensor nodes.
Availability
MAX922CUA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial sensor interfaces requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature-grade performance.
Supply support for MAX922CUA 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) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX921–MAX924 family was designed specifically for ultra-low-power threshold detection in space- and energy-constrained systems, emphasizing micropower operation, rail-to-rail input capability, and robust output drive without compromising stability.
FAQ
What is the maximum supply voltage for MAX922CUA in single-supply operation?
The MAX922CUA supports a single-supply voltage range of +2.5V to +11V. When operated from a single supply, V− must be connected to ground, and the absolute maximum voltage between V+ and V− is +11V. Exceeding this risks permanent damage per Absolute Maximum Ratings.
Does MAX922CUA include an internal voltage reference?
No, the MAX922CUA does not include an internal voltage reference. Unlike MAX921 or MAX923, it omits the REF pin and associated 1.182V bandgap circuitry. External reference sources must be provided for precise threshold setting in MAX922CUA-based designs.
Can MAX922CUA be used with dual supplies such as ±5V?
Yes, MAX922CUA operates from dual supplies ranging from ±1.25V to ±5V. In this configuration, V+ connects to +5V, V− connects to −5V, and the outputs swing fully from +5V to −5V - enabling direct interfacing with bipolar analog signals without level-shifting circuitry.
What is the purpose of the V− pin on MAX922CUA?
The V− pin on MAX922CUA serves as the negative supply rail and defines the lower bound of both the input common-mode range and the output voltage swing. In single-supply use, it must be tied to ground; in dual-supply use, it connects to the negative rail - unlike MAX921/MAX924, it is not internally tied to GND.
How is hysteresis implemented on MAX922CUA since it lacks a HYST pin?
Hysteresis on MAX922CUA is implemented externally using positive feedback - typically a resistor network from output to noninverting input. The MAX922CUA datasheet provides design equations and example values (e.g., R3 = 10MΩ, R1 ≈ 100kΩ) to set precise hysteresis bands without relying on internal HYST functionality.
MAX922CUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MAX922CUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922CUA 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 reliable?
The price and inventory of MAX922CUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922CUA is usually 5 days.
3.What payment methods are accepted for MAX922CUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922CUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922CUA?
MAX922CUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922CUA 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?
For technical support, including MAX922CUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922CUA requirements.
6.How does Aetrix verify that MAX922CUA is sourced from the original manufacturer or authorized distributors?
All MAX922CUA 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 meets industry standards.
7.What is the process for return or replacement of MAX922CUA?
All MAX922CUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX922CUA, 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 part is unused and in its original packaging.
Return procedure for MAX922CUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922CUA Tags
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