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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:3,753
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Product details
Overview
MAX922CPA+ from Maxim Integrated is a dual micropower comparator with no internal voltage reference or hysteresis, operating from +2.5V to +11V (or ±1.25V to ±5.5V), delivering 4μA max supply current over temperature, TTL/CMOS-compatible outputs that source/sink current, and input common-mode range extending to V− and within 1.3V of V+. It is used in battery-powered threshold detection where low quiescent power and rail-to-rail input capability are critical.
For engineers reviewing the MAX922CPA+ datasheet, MAX922CPA+ pinout, MAX922CPA+ application, or MAX922CPA+ equivalent, key selection criteria include dual-comparator architecture without integrated reference, output swing from V+ to V−, 12μs propagation delay at 10mV overdrive, and compatibility with single- or dual-supply configurations in space-constrained industrial and portable systems.
Technical Context
The MAX922CPA+ implements two independent comparators with matched input offset voltage (±10mV) and ultra-low input leakage (±0.01nA typical), enabling precise DC threshold sensing across wide supply ranges. Its output stage continuously sources up to 40mA while eliminating crowbar current during transitions-critical for stable operation without external bypassing.
Unlike MAX921/MAX923, it lacks HYST and REF pins; hysteresis must be implemented externally via positive feedback. Input common-mode range spans V− to (V+ − 1.3V), supporting operation near supply rails in both single- and dual-supply modes, with guaranteed functionality from 0°C to +70°C.
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 direct interface with 3V/5V logic and bipolar sensor signals |
| Quiescent Supply Current | ≤4μA over 0°C to +70°C - enables multi-year battery life in always-on monitoring circuits |
| Propagation Delay | 12μs at 10mV overdrive - ensures timely response in low-speed control loops and window detection |
| Input Offset Voltage | ±10mV - sets minimum detectable differential voltage without calibration |
| Output Drive Capability | Sources ≥40mA, sinks ≥5mA - directly drives LEDs, small relays, or logic inputs without buffer stages |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows sensing signals referenced to negative rails or ground in mixed-supply systems |
| Output Voltage Swing | V+ to V− - eliminates need for level-shifting when interfacing with analog front-ends or dual-rail controllers |
Pinout & Package
MAX922CPA+ is housed in an 8-pin plastic DIP package (0.300" width), through-hole mountable, with JEDEC MS-001AC footprint. Pin functions are validated per Maxim's official pin configuration diagram for MAX922.
| Pin/Terminal | 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 - accepts +2.5V to +11V (single) or connects to positive rail in dual-supply mode |
| 3 | INB+ | Noninverting input of comparator B - high-impedance node (leakage ≤±0.01nA) for precision threshold setting |
| 4 | INB− | Inverting input of comparator B - matched to INB+ for differential sensing or reference comparison |
| 5 | INA− | Inverting input of comparator A - electrically identical to INB−; supports independent dual-channel operation |
| 6 | INA+ | Noninverting input of comparator A - fully decoupled from comparator B inputs for separate signal paths |
| 7 | V− | Negative supply - connects to ground in single-supply mode or negative rail in dual-supply mode |
| 8 | OUTA | Comparator A output - functionally identical to OUTB; enables simultaneous dual-threshold decisions |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables concurrent high/low threshold detection or window comparison without external multiplexing |
| Rail-to-rail input common-mode range | Supports direct sensing of signals from V− up to 1.3V below V+, eliminating level-shifters in many analog interfaces |
| No crowbar current during switching | Prevents supply-line glitches and parasitic feedback, improving stability in poorly decoupled PCB layouts |
| 40mA continuous output source current | Drives LEDs, optocouplers, or MOSFET gates directly-reducing BOM count and board area |
| Ultra-low 4μA supply current | Extends battery runtime in remote sensors and portable instrumentation without sacrificing speed or drive strength |
Applications
| Battery-Powered Threshold Detector | Single-Supply Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage in a handheld medical device to trigger low-battery alert before shutdown. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against upper and lower thresholds set by resistor dividers; OUTA and OUTB provide active-low flags. Use Value: 4μA quiescent current preserves battery life; rail-to-rail inputs accommodate full 0–4.2V Li-ion range without external biasing. | Use Scenario: Detecting valid 5V system supply in an industrial controller with undervoltage/overvoltage lockout. IC Role / Device Role / Timing Role: One comparator monitors upper limit (e.g., 5.5V), the other lower limit (e.g., 4.5V); outputs feed AND gate for "power good" signal. Use Value: Independent inputs allow precise, non-interacting threshold setting; V+ to V− output swing matches TTL logic levels directly. |
| Oscillator Circuit with External Hysteresis | Level Shifter for Bipolar Signals |
Use Scenario: Building a relaxation oscillator in a low-power environmental sensor node using RC timing and comparator feedback. IC Role / Device Role / Timing Role: Comparator A forms hysteresis loop with external resistors and capacitor; comparator B remains available for auxiliary monitoring. Use Value: No internal reference simplifies design flexibility; 12μs propagation delay enables predictable oscillation frequency down to ~10kHz. | Use Scenario: Converting ±5V analog sensor outputs (e.g., strain gauge bridge) to 0–5V logic-compatible signals for microcontroller ADC input. IC Role / Device Role / Timing Role: Comparator A compares negative input against ground; comparator B compares positive input-enabling sign detection and zero-crossing identification. Use Value: Input range includes V− allows direct connection to −5V rail; output swing to V− ensures clean low-state definition in dual-supply systems. |
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; 0.4mA supply current; open-collector outputs only | Requires pull-up resistors and external reference; unsuitable for sourcing loads or rail-to-rail output swing | Select when cost sensitivity outweighs power/performance needs and open-drain interface is acceptable |
| TLV3702IDR | 1.8V–16V supply; 850nA supply current; rail-to-rail I/O; push-pull output; no reference | Lower power than MAX922CPA+ but limited to 16V max; smaller SOT-23-8 package; no DIP option | Select for ultra-low-power battery systems where surface-mount assembly is preferred and supply stays ≤16V |
Compared with LM393DR and TLV3702IDR, MAX922CPA+ uniquely combines 4μA supply current, 40mA sourcing capability, and through-hole DIP packaging-making it optimal for legacy designs, prototyping, and low-power industrial controls requiring robust output drive without layout compromises.
Availability
MAX922CPA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with long-term manufacturability and consistent parametric performance.
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 industrial, automotive, and communications applications, emphasizing low power, high reliability, and integration.
The MAX921–MAX924 family was engineered for ultra-low-power threshold detection in portable and energy-harvesting systems, prioritizing micropower operation, rail-to-rail input capability, and robust output drive without external components.
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 specification compliance across 0°C to +70°C. Exceeding +11V risks permanent damage, as absolute maximum rating for V+ to GND is +12V. For reliable long-term operation, stay within the 2.5V–11V specified range. The MAX922CPA+ datasheet confirms this limit under Absolute Maximum Ratings and Electrical Characteristics tables.
Does MAX922CPA+ include an internal voltage reference?
No, MAX922CPA+ does not include an internal voltage reference. Unlike MAX921/MAX923, it omits the REF and HYST pins. Reference voltages must be supplied externally-e.g., via resistor divider, bandgap IC, or DAC output. This design choice reduces die size and cost while maximizing flexibility for custom threshold programming. The MAX922CPA+ datasheet explicitly states "No" under "INTERNAL 1% PRECISION REFERENCE" in the Ordering Information table.
Can MAX922CPA+ operate from a dual ±5V supply?
Yes, MAX922CPA+ operates from dual supplies ranging from ±1.25V to ±5.5V. With ±5V applied (V+ = +5V, V− = −5V), its inputs accept signals from −5V to +3.7V, and outputs swing fully from −5V to +5V. This enables direct interfacing with bipolar sensors and legacy analog systems. The MAX922CPA+ datasheet confirms dual-supply compatibility in the General Description and Electrical Characteristics sections.
What is the output configuration of MAX922CPA+?
MAX922CPA+ features push-pull (totem-pole) outputs on both comparators-OUTA and OUTB-that actively source and sink current. Each output swings rail-to-rail between V+ and V−, eliminating the need for external pull-up resistors. This differs from open-collector comparators like LM393. The MAX922CPA+ datasheet specifies output high/low voltage limits under load conditions and highlights "no switching crowbar current" as a key architectural feature.
Is MAX922CPA+ pin-compatible with other devices in the MAX92x family?
No, MAX922CPA+ is not pin-compatible with MAX921CPA+, MAX923CPA+, or MAX924CPE+. While all use 8-pin DIP packages, pin assignments differ: MAX922CPA+ places OUTB on pin 1 and INA+ on pin 6, whereas MAX921CPA+ uses pin 1 for GND and pin 6 for REF. Swapping devices without PCB redesign will cause functional failure. The MAX922CPA+ pin configuration diagram in the datasheet confirms this unique mapping.
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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LM2903DR
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LM339DR
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LM393DT
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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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