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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:3,006
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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 capable of sourcing up to 40mA - 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 considerations include its dual-comparator architecture without integrated reference, output swing from V+ to V− (requiring V− connection to GND for TTL compatibility), 12μs propagation delay at 10mV overdrive, and μMAX package footprint for space-constrained designs.
Technical Context
The MAX922CUA-T implements two independent comparators with matched input offset voltage (±10mV max) and ultra-low input leakage (±0.01nA typical). Its output stage eliminates crowbar current during transitions, minimizing supply-line parasitic feedback and enabling stable operation without stringent PCB layout constraints.
Unlike MAX921/MAX923, it lacks both internal 1.182V reference and HYST pin - hysteresis must be implemented externally via positive feedback. Input common-mode range extends to within 1.3V of V+, and output drives fully from V+ to V−, requiring explicit V− connection for single-supply use.
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 3V/5V logic and bipolar sensor signals. |
| Quiescent Supply Current | ≤4μA over full commercial temperature range (0°C to +70°C) - extends battery life in always-on monitoring systems. |
| Input Offset Voltage | ±10mV max - ensures accurate threshold detection down to ~20mV differential input. |
| Propagation Delay | 12μs typical at 10mV overdrive - suitable for medium-speed window detection and oscillator timing. |
| Output Drive Capability | Sources up to 40mA continuously - directly drives LEDs, small relays, or logic inputs without external buffers. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - supports sensing near ground or high-side signals in single-supply configurations. |
| Output Voltage Swing | V+ to V− - requires V− tied to GND for TTL-level output; incompatible with open-drain or rail-to-rail-GND-only interfaces. |
Pinout & Package
Package: 8-pin μMAX (3mm × 3mm, 0.5mm pitch), thermally enhanced leadless package optimized for compact, low-profile PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output - sinks and sources current; swings from V+ to V−; connects to load or next-stage logic. |
| 2 | V+ | Positive supply input - accepts +2.5V to +11V (single) or +1.25V to +5.5V (dual positive rail). |
| 3 | INB+ | Noninverting input of comparator B - high-impedance node (leakage <0.01nA); referenced to V−. |
| 4 | INB− | Inverting input of comparator B - same impedance and voltage range as INB+; used for differential or single-ended comparison. |
| 5 | INA− | Inverting input of comparator A - electrically identical to INB−; supports independent dual-channel sensing. |
| 6 | INA+ | Noninverting input of comparator A - matches INB+ performance; enables simultaneous A/B threshold evaluation. |
| 7 | V− | Negative supply terminal - must be connected to GND for single-supply TTL operation; defines output low level and reference point. |
| 8 | OUTA | Comparator A output - functionally identical to OUTB; allows independent control of two loads or logic paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables concurrent high/low threshold detection or redundant signal monitoring in one IC - reduces component count vs. two singles. |
| No internal reference or hysteresis | Provides design flexibility: external reference selection (e.g., precision bandgap) and customizable hysteresis via resistor networks - avoids fixed 1.182V limitation. |
| 40mA continuous output source | Drives LEDs, optocouplers, or MOSFET gates directly - eliminates need for external driver transistors in low-power interfaces. |
| Crowbar-current-free output stage | Prevents supply rail disturbance during output transitions - improves noise immunity and simplifies power integrity in mixed-signal systems. |
| Rail-to-rail input common-mode range | Accepts inputs from V− up to V+ −1.3V - supports ground-referenced sensors and high-side current sense amplifiers without level-shifting. |
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 compares sensed voltage against upper and lower thresholds using external resistor dividers. Use Value: Ultra-low 4μA quiescent current preserves standby battery life; independent OUTA/OUTB outputs enable separate high/low alerts without microcontroller polling. | Use Scenario: Validating regulated 5V supply in industrial controller - asserting "power good" only when voltage stays between 4.75V and 5.25V. IC Role / Device Role / Timing Role: One comparator monitors upper limit (5.25V), the other lower limit (4.75V); outputs ANDed to generate system enable signal. Use Value: Matched input offset (±10mV) ensures tight window accuracy; V+ to V− output swing guarantees clean logic levels even with noisy ground references. |
| Oscillator Circuit (Relaxation) | Level-Shifting Interface |
Use Scenario: Generating precise 1kHz clock signal in low-power sensor node using RC timing network and comparator hysteresis. IC Role / Device Role / Timing Role: Comparator acts as Schmitt trigger with externally configured hysteresis; charges/discharges capacitor through resistor. Use Value: 12μs propagation delay enables stable oscillation above ~5kHz; low supply current minimizes timing circuit's overall power budget. | Use Scenario: Converting ±5V analog sensor output (e.g., strain gauge bridge) into 0–5V TTL-compatible digital signal for MCU input. IC Role / Device Role / Timing Role: Comparator compares bipolar input against 0V reference; V− tied to −5V enables direct sensing of negative excursions. Use Value: Input common-mode range extending to V− allows direct interface with ±5V signals - no level-shifter IC or op-amp required. |
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; open-collector outputs; 1.5mA supply current; wider input offset (±2mV typ, ±7mV max). | Requires pull-up resistor; cannot source current; higher power draw limits battery life. | Select LM393DR only when open-drain interface or cost sensitivity outweighs ultra-low-power and sourcing capability requirements. |
| TLV3702IDR | RRIO inputs; rail-to-rail output (V− to V+); 850nA supply current; 1.5μs propagation delay; no internal reference. | Supports true rail-to-rail output swing including GND; faster response but lower drive strength (10mA source). | Choose TLV3702IDR for GND-referenced output loads or sub-microsecond timing; avoid when >10mA sourcing is needed. |
Compared with LM393DR and TLV3702IDR, the MAX922CUA-T uniquely combines 4μA quiescent current, 40mA sourcing capability, and V+–to–V− output swing - making it optimal for self-powered threshold detectors driving LEDs or small actuators where efficiency and drive strength are jointly critical.
Availability
MAX922CUA-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor interfaces, portable medical devices, and low-power embedded control systems requiring stable component supply across production lifecycles.
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, automotive, and communications markets.
The MAX921–MAX924 family was engineered specifically for ultra-low-power, single/dual-supply comparator applications demanding micropower operation (<4μA), robust output drive, and simplified hysteresis implementation - targeting portable and energy-harvesting systems.
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 guaranteed performance including ≤4μA quiescent current and 12μs propagation delay. Exceeding +11V risks permanent damage per absolute maximum ratings. For 5V TTL compatibility, connect V− to GND and apply +5V to V+.
Does MAX922CUA-T include an internal voltage reference?
No, the MAX922CUA-T does not include an internal voltage reference. Unlike MAX921/MAX923, it omits the 1.182V bandgap reference and HYST pin. Reference voltages must be supplied externally - enabling flexible threshold setting with precision references or resistor dividers tied to stable supplies.
Can MAX922CUA-T drive an LED directly without a current-limiting resistor?
No, MAX922CUA-T requires an external current-limiting resistor to drive an LED. While its output can source up to 40mA continuously, connecting an LED directly risks exceeding safe forward current. For example, with a 5V supply and red LED (VF ≈ 1.8V), a 220Ω resistor limits current to ~14.5mA - ensuring reliability and thermal safety within the device's SOA.
What is the input common-mode voltage range of MAX922CUA-T?
The input common-mode voltage range of MAX922CUA-T is specified from V− to (V+ − 1.3V). With V− = 0V and V+ = 5V, inputs may range from 0V to 3.7V. This allows interfacing with sensors whose outputs swing near ground or mid-supply, but excludes full rail-to-rail input capability - inputs must stay ≥1.3V below V+.
How is hysteresis implemented on MAX922CUA-T since it lacks a HYST pin?
Hysteresis on MAX922CUA-T is implemented externally using positive feedback. A resistor (R1) connects comparator output to its noninverting input, and another (R2) ties that input to a reference voltage. The hysteresis band equals VREF × R1/(R1 + R2). This method draws more current than MAX921's HYST pin but offers full design control over threshold spacing and stability.
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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