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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:4,657
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Product details
Overview
The MAX922CUA+ from Maxim Integrated is a dual ultra-low-power voltage comparator in an 8-pin μMAX package, featuring no internal reference, programmable hysteresis via external resistors, TTL/CMOS-compatible outputs that both sink and source current, and operation from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply). It delivers 4μA max quiescent current over 0°C to +70°C and supports battery-powered threshold detection with rail-to-rail input swing down to V− and within 1.3V of V+.
For engineers reviewing the MAX922CUA+ datasheet, MAX922CUA+ pinout, MAX922CUA+ application, or MAX922CUA+ equivalent, this page provides verified technical context, exact pin functions, real-world timing and drive capability data, and two confirmed alternative parts for dual-comparator low-power designs - all grounded in Maxim's official 19-0115 Rev 7 specification.
Technical Context
The MAX922CUA+ contains two independent micropower comparators with open-collector–compatible outputs capable of continuous 40mA sourcing and >5mA sinking, eliminating crowbar current during transitions to suppress parasitic feedback. Its input common-mode range extends from V− to (V+ − 1.3V), supporting operation with inputs beyond the negative rail by up to 300mV without damage.
Hysteresis is implemented externally using positive feedback (e.g., R1/R2 network between OUT and IN+), distinct from the HYST-pin method used in MAX921/MAX923. Propagation delay is 12μs typical at 10mV overdrive (100pF load), and output logic levels meet TTL/CMOS thresholds when powered from +5V single supply with V− tied to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - enables direct interface with 3V/5V systems and bipolar signal monitoring. |
| Quiescent Supply Current | ≤4μA over 0°C to +70°C - ensures multi-year battery life in portable threshold detectors. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows sensing near ground or negative rails without level-shifting circuitry. |
| Propagation Delay | 12μs typical (10mV overdrive, 100pF load) - supports medium-speed window detection and oscillator frequencies up to ~30kHz. |
| 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 precision threshold applications. |
| Input Leakage Current | ±5nA max (C/E temp range) - preserves accuracy in high-impedance sensor interfaces (e.g., thermistors, photodiodes). |
Pinout & Package
Package: 8-pin μMAX (3mm × 3mm, 0.5mm pitch), lead-free, RoHS-compliant surface-mount package optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks and sources current; swings from V+ to V− - connects directly to TTL/CMOS loads when V− = GND. |
| 2 | V+ | Positive supply pin - accepts +2.5V to +11V (single) or +1.25V to +5.5V (dual supply positive rail). |
| 3 | INB+ | Noninverting input of comparator B - high-impedance node (±5nA leakage); used for reference or signal routing in window detectors. |
| 4 | INB− | Inverting input of comparator B - matched to INB+ for differential sensing; supports rail-to-rail common-mode input. |
| 5 | INA− | Inverting input of comparator A - electrically identical to INB−; enables dual independent comparisons from shared signal sources. |
| 6 | INA+ | Noninverting input of comparator A - paired with INA−; used for threshold comparison against sensor outputs or reference dividers. |
| 7 | V− | Negative supply pin - tied to GND for single-supply operation; defines output swing lower limit and reference for input range. |
| 8 | OUTA | Comparator A output; sinks and sources current; swings from V+ to V− - independently controllable output for dual-threshold logic. |
Key Features
| Feature | Design Value |
|---|---|
| No internal voltage reference | Enables flexible threshold setting using external resistor dividers - avoids fixed 1.182V constraint of MAX921/MAX923. |
| External hysteresis support | Allows precise, user-defined hysteresis bands (e.g., ±5mV to ±50mV) via two-resistor positive feedback - eliminates chatter in noisy environments. |
| 40mA continuous output source | Drives LEDs, optocouplers, or MOSFET gates directly - removes need for external driver stages in low-power systems. |
| No crowbar switching current | Prevents supply-line glitches during output transitions - improves stability in poorly bypassed or high-impedance power domains. |
| Rail-to-rail input voltage range | Accepts signals from V− to (V+ − 1.3V) - simplifies interfacing with sensors, battery monitors, and industrial analog front-ends. |
Applications
| Battery-Powered Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage to trigger low-battery warning and prevent deep discharge in handheld medical devices. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against upper (4.2V) and lower (3.0V) thresholds using resistor-divider networks on INA+/INB+ and INA−/INB−. Use Value: 4μA quiescent current extends battery life; independent OUTA/OUTB outputs enable discrete low/high alerts without microcontroller polling. |
Use Scenario: Validating regulated 5V supply integrity in industrial PLC I/O modules, asserting "power good" only when voltage stays within 4.75V–5.25V. IC Role / Device Role / Timing Role: MAX922CUA+ implements undervoltage (OUTA) and overvoltage (OUTB) detection; outputs ANDed to generate clean power-good signal. Use Value: External hysteresis prevents oscillation near trip points; rail-to-rail inputs tolerate supply ripple without clipping. |
| Oscillator Circuit | Level Shifter for Bipolar Signals |
Use Scenario: Building relaxation oscillator for LED blink timing or watchdog timeout in energy-harvesting sensor nodes. IC Role / Device Role / Timing Role: One comparator acts as threshold detector charging/discharging RC network; feedback path sets frequency via hysteresis band. Use Value: 12μs propagation delay enables stable oscillation up to ~30kHz; low supply current minimizes impact on energy budget. |
Use Scenario: Converting ±5V analog sensor outputs (e.g., strain gauge bridge) into 0V/5V logic levels for MCU ADC input protection. IC Role / Device Role / Timing Role: Comparator A compares negative half-cycle (INB− referenced to V−), Comparator B handles positive half-cycle (INA+ referenced to V+). Use Value: Input tolerance to ±0.3V beyond rails allows direct connection to ±5V sources; TTL-compatible outputs interface cleanly with 5V MCUs. |
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 output sourcing capability (open-collector only); ±15mV offset; no rail-to-rail input. | Requires pull-up resistors and external buffering for sourcing loads; less suitable for battery-critical or high-drive applications. | Select LM393DR only when cost is primary concern and 4μA quiescent current or 40mA sourcing is unnecessary. |
| TLV3702IDR | 2.8μA supply current; rail-to-rail input/output; 1.8V to 16V supply; includes internal ESD protection; no hysteresis pin but supports external feedback. | Better suited for low-voltage (1.8V–3.3V) systems and mixed-signal PCBs where ESD robustness matters; lacks dedicated V− pin for dual-supply flexibility. | Choose TLV3702IDR for modern 3.3V embedded designs requiring enhanced ruggedness and lower supply headroom than MAX922CUA+. |
Compared with LM393DR and TLV3702IDR, the MAX922CUA+ uniquely combines ultra-low 4μA supply current, 40mA output sourcing, and explicit V− pin for true dual-supply operation - making it optimal for long-life battery systems needing direct drive and bipolar signal handling.
Availability
MAX922CUA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply across commercial temperature range (0°C to +70°C) and μMAX footprint compatibility.
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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on low-power, high-reliability solutions for industrial and portable markets.
The MAX921–MAX924 family was engineered specifically for micropower comparator applications demanding sub-5μA quiescent current, rail-to-rail input operation, and robust output drive - targeting battery longevity and layout simplicity in space-constrained systems.
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 with V− tied to GND, the absolute maximum rating for V+ is +12V, but functional operation is guaranteed only up to +11V per the datasheet's Electrical Characteristics table. Exceeding +11V may compromise long-term reliability or parametric performance.
Does MAX922CUA+ include an internal voltage reference?
No, the MAX922CUA+ does not include an internal voltage reference. Unlike the MAX921 or MAX923, it omits the REF and HYST pins. Thresholds must be set externally using resistor dividers applied to the IN+ and IN− inputs. This design provides full flexibility in reference selection while reducing die area and cost.
Can MAX922CUA+ operate from a dual ±5V supply?
Yes, the MAX922CUA+ is fully specified for dual-supply operation from ±1.25V to ±5.5V. With V+ = +5V and V− = −5V, its inputs accept signals from −5V to +3.7V, and outputs swing from +5V to −5V - enabling direct interfacing with bipolar op-amp stages or legacy industrial signal chains without level shifting.
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 output swing. In single-supply mode, it is connected to GND; in dual-supply mode, it is tied to the negative rail. It is not a ground reference for the entire chip - the output stage swings relative to V−, not GND.
How is hysteresis implemented on MAX922CUA+?
Hysteresis on MAX922CUA+ is implemented externally using positive feedback: a resistor (R1) connects the comparator output (e.g., OUTA) to its noninverting input (INA+), and another resistor (R2) connects INA+ to a reference voltage. This creates distinct upper/lower thresholds, suppressing noise-induced output chatter - unlike MAX921/MAX923, which use the dedicated HYST pin.
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:
- Bulk
- 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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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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