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Analog Devices Inc./Maxim Integrated MAX922CPA
- Part No.:
- MAX922CPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX922CPA.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,880
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Product details
Overview
MAX922CPA from Maxim Integrated is a dual micropower comparator in 8-pin plastic DIP, operating from +2.5V to +11V (or ±1.25V to ±5.5V), drawing ≤4μA supply current over temperature, with TTL/CMOS-compatible outputs that source/sink current and swing from V+ to V−. It enables low-power threshold detection in battery-powered instrumentation.
For engineers reviewing the MAX922CPA datasheet, MAX922CPA pinout, MAX922CPA application, or MAX922CPA equivalent, key selection criteria include its dual-comparator architecture without internal reference or hysteresis, rail-to-rail input range (V− to V+ − 1.3V), 12μs propagation delay at 10mV overdrive, and compatibility with single- or dual-supply systems requiring <4μA quiescent current.
Technical Context
The MAX922CPA contains two independent comparators with no internal voltage reference or programmable hysteresis-unlike MAX921/MAX923-requiring external reference and feedback for thresholding. Its input common-mode range extends from V− to (V+ − 1.3V), supporting operation near supply rails.
Each output continuously sources up to 40mA and sinks >5mA while eliminating crowbar current during transitions, minimizing parasitic supply feedback. Input offset voltage is ±10mV, input leakage is ±0.01nA (C/E temp), and voltage noise is 20μVRMS (100Hz–100kHz).
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-supports wide-input industrial and portable systems. |
| Quiescent Supply Current | ≤4μA over 0°C to +70°C-enables multi-year battery life in always-on sensing nodes. |
| Input Offset Voltage | ±10mV max-defines minimum detectable differential signal without calibration. |
| Propagation Delay | 12μs at 10mV overdrive-sets timing resolution for fast threshold-crossing events. |
| Output Drive Capability | Sources ≥40mA continuously, sinks >5mA-directly drives LEDs, small relays, or logic inputs without buffers. |
| Input Common-Mode Range | V− to (V+ − 1.3V)-allows detection of signals within 1.3V of positive rail, critical for high-side monitoring. |
| Input Leakage Current | ±0.01nA (0°C to +70°C)-minimizes error in high-impedance sensor interfaces (e.g., photodiode, thermistor dividers). |
Pinout & Package
MAX922CPA uses an 8-pin plastic DIP package with through-hole mounting, rated for 0°C to +70°C operation. Pin functions are validated per Maxim's official pin configuration diagram (MAX922 DIP top view).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output-sinks and sources current, swings rail-to-rail between V+ and V−. |
| 2 | V+ | Positive supply input-accepts +2.5V to +11V or connects to +5.5V in dual-supply mode. |
| 3 | INB+ | Noninverting input of comparator B-used for active-high threshold comparison. |
| 4 | INB− | Inverting input of comparator B-paired with INB+ to define switching point. |
| 5 | INA− | Inverting input of comparator A-supports independent second threshold detection path. |
| 6 | INA+ | Noninverting input of comparator A-configurable as window or level detector input. |
| 7 | V− | Negative supply-connect to GND for single supply; to −5V for bipolar operation. |
| 8 | OUTA | Comparator A output-fully independent of OUTB, enabling dual decision logic. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Operates with inputs from V− to V+ − 1.3V-enables direct sensing of signals near supply rails without level-shifting. |
| No internal reference or hysteresis | Allows full design flexibility: external precision reference and custom hysteresis network for application-specific noise immunity. |
| 40mA continuous output source | Drives LEDs, optocouplers, or MOSFET gates directly-eliminates need for external driver stages in low-power systems. |
| Crowbar-current-free output stage | Prevents supply glitches during logic transitions-reduces EMI and avoids instability in poorly decoupled layouts. |
| Ultra-low 4μA max supply current | Enables multi-decade battery operation in remote sensors-verified across full commercial temperature range. |
Applications
| Battery-Powered Threshold Detector | Window Comparator System |
|---|---|
|
Use Scenario: Monitoring battery voltage in portable medical devices to trigger low-battery warning before shutdown. IC Role / Device Role: Dual comparator implements upper (e.g., 4.2V) and lower (e.g., 3.0V) thresholds using resistor dividers and external reference. Use Value: 4μA quiescent current extends usable battery life by >30% versus comparable comparators; rail-to-rail inputs ensure accurate detection near cutoff. |
Use Scenario: Validating regulated DC supply voltage in industrial PLC I/O modules against tight ±5% tolerance bands. IC Role / Device Role: Two MAX922CPA units configured as independent overvoltage and undervoltage detectors feeding AND logic for power-good assertion. Use Value: Independent outputs enable fault isolation; 12μs response ensures rapid shutdown on supply excursion-critical for protecting downstream FPGAs. |
| Oscillator Circuit (Relaxation) | Level-Shifting Interface |
|
Use Scenario: Generating precise clock signals in ultra-low-power data loggers where crystal oscillators consume too much energy. IC Role / Device Role: One comparator acts as integrator reset switch; second provides hysteresis via external RC feedback to set frequency. Use Value: Dual architecture eliminates need for external op-amp-reducing BOM count and PCB area while maintaining <1% frequency stability over temperature. |
Use Scenario: Converting ±5V analog sensor outputs (e.g., strain gauge bridges) to 0V/5V logic levels for microcontroller ADC input protection. IC Role / Device Role: Comparator compares bipolar input against 0V reference (GND), producing clean CMOS-compatible output. Use Value: Input range includes negative rail-no level-shifter IC required; 40mA output drives 50Ω transmission lines directly for noise-immune digital signaling. |
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 only-requires pull-up resistors. | Not suitable for battery life-critical designs; limited to 36V max supply; lacks sourcing capability. | Choose LM393DR only when cost is primary constraint and 4μA quiescent current is unnecessary. |
| TLV3702IDR | 2.5μA supply current, rail-to-rail inputs/outputs, but only 10mA source drive and 100mV output swing limitation near rails. | Superior for rail-to-rail precision but insufficient for driving LEDs or relays directly. | Choose TLV3702IDR when ultra-low power and precision offset (<2mV) are needed-but add external driver if >10mA load required. |
Compared with LM393DR and TLV3702IDR, MAX922CPA uniquely combines sub-4μA quiescent current, rail-to-rail input range, and 40mA sourcing capability-making it the only option for self-powered, high-drive threshold detection without auxiliary circuitry.
Availability
MAX922CPA is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial voltage monitoring, and low-power oscillator circuits requiring stable component supply across extended production cycles.
Supply support for MAX922CPA 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 systems.
The MAX921–MAX924 family was engineered specifically for micropower threshold detection-prioritizing ultra-low supply current, rail-to-rail input operation, and robust output drive in compact packages.
FAQ
What is the maximum supply voltage for MAX922CPA in single-supply operation?
The MAX922CPA supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains full functionality including rail-to-rail input operation and 40mA output sourcing. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Does MAX922CPA include an internal voltage reference?
No, MAX922CPA does not include an internal voltage reference. Unlike MAX921 or MAX923, it requires an external reference (e.g., MAX6126, TLV431) for precise threshold setting. This design allows full flexibility in reference selection and hysteresis implementation.
Can MAX922CPA operate from a dual ±5V supply?
Yes, MAX922CPA operates from dual supplies ranging from ±1.25V to ±5.5V. With V+ = +5V and V− = −5V, its outputs swing fully from −5V to +5V, and inputs accept signals from −5V to +3.7V-enabling direct interfacing with bipolar sensor outputs.
What is the guaranteed input common-mode voltage range for MAX922CPA?
The guaranteed input common-mode voltage range for MAX922CPA is from V− to (V+ − 1.3V). For example, with V+ = 5V and V− = 0V, inputs function correctly from 0V to 3.7V-covering most mid-supply thresholds without attenuation or clamping.
How does MAX922CPA eliminate crowbar current during output transitions?
MAX922CPA uses a unique output stage architecture that prevents simultaneous conduction of high-side and low-side devices during switching. This eliminates crowbar current, reducing supply-line transients and parasitic feedback-critical for stable operation in minimally bypassed or noisy environments.
MAX922CPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- :
- 8-PDIP
MAX922CPA FAQ
1.How can I place an order for MAX922CPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922CPA 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 MAX922CPA reliable?
The price and inventory of MAX922CPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922CPA is usually 5 days.
3.What payment methods are accepted for MAX922CPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922CPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922CPA?
MAX922CPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922CPA 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 MAX922CPA?
For technical support, including MAX922CPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922CPA requirements.
6.How does Aetrix verify that MAX922CPA is sourced from the original manufacturer or authorized distributors?
All MAX922CPA 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 MAX922CPA meets industry standards.
7.What is the process for return or replacement of MAX922CPA?
All MAX922CPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX922CPA, 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 MAX922CPA part is unused and in its original packaging.
Return procedure for MAX922CPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922CPA Tags
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LM339DR
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LM339PWR
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LM393DT
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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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