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Analog Devices Inc./Maxim Integrated MAX922CSA+
- Part No.:
- MAX922CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX922CSA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:234
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Product details
Overview
The MAX922CSA+ from Maxim Integrated is a dual ultra-low-power voltage comparator with TTL/CMOS-compatible outputs, 4μA max supply current over temperature, single +2.5V to +11V or dual ±1.25V to ±5.5V operation, and rail-to-rail input range extending to within 1.3V of V+. It serves as a precision threshold detector in battery-powered instrumentation and low-voltage monitoring circuits.
For engineers reviewing the MAX922CSA+ datasheet, MAX922CSA+ pinout, MAX922CSA+ application, or MAX922CSA+ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the MAX922CSA+ commercial-grade 8-pin SO package.
Technical Context
The MAX922CSA+ contains two independent comparators without internal reference or programmable hysteresis-unlike MAX921/MAX923-making external reference and feedback mandatory for thresholding. Its output stage sources up to 40mA continuously and sinks >5mA, with no crowbar current during transitions, eliminating supply-line glitches and parasitic feedback.
Input common-mode range spans V− to (V+ − 1.3V); inputs tolerate −0.3V to (V+ + 0.3V). Output swing is from V+ to V− (not GND), requiring V− connection to ground for TTL compatibility under +5V single-supply operation. Propagation delay is 12μs typical at 10mV overdrive (100pF load).
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 bipolar signal monitoring and 3V/5V embedded systems. |
| Quiescent Current | ≤4μA over full commercial temperature range (0°C to +70°C) - enables multi-year operation on coin-cell batteries. |
| Input Offset Voltage | ±10mV max - sets minimum detectable voltage difference without calibration. |
| Propagation Delay | 12μs typical at 10mV overdrive (100pF load) - determines maximum usable signal edge rate in timing-critical detection. |
| Output Drive | 40mA continuous source / >5mA sink - directly drives LEDs, small relays, or logic inputs without external buffers. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows sensing near supply rails, e.g., detecting battery depletion at <100mV above ground. |
| Output Voltage Swing | V+ to V− - requires explicit V− tie to GND for TTL-level output; incompatible with open-drain or pull-up-only interfaces. |
Pinout & Package
MAX922CSA+ uses an 8-pin SO (Small Outline) package with exposed pad (RoHS-compliant, lead-free). Pin 1 is marked by notch or dot; pin numbering follows standard SO convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output: actively sources/sinks current; swings V+ to V−; requires V− = GND for TTL logic levels. |
| 2 | V+ | Positive supply input: 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 ≤±5nA); referenced to V−. |
| 4 | INB− | Inverting input of comparator B: same impedance and voltage range as INB+; used for differential or single-ended thresholds. |
| 5 | INA− | Inverting input of comparator A: electrically identical to INB−; supports independent dual-threshold configuration. |
| 6 | INA+ | Noninverting input of comparator A: matches INB+ specs; enables two separate comparison channels on one die. |
| 7 | V− | Negative supply input: connect to GND for single supply; required for output swing definition and input common-mode compliance. |
| 8 | OUTA | Comparator A output: functionally identical to OUTB; shares same drive strength and rail-to-rail swing behavior. |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar current during switching | Eliminates supply-line transients that cause instability in poorly decoupled layouts or shared power domains. |
| 40mA continuous output source capability | Drives multiple standard LEDs or logic gates directly-no external transistor needed for indicator or control signaling. |
| Rail-to-rail input range (V− to V+ − 1.3V) | Enables accurate low-voltage detection (e.g., 100mV battery cutoff) without level-shifting circuitry. |
| TTL/CMOS-compatible outputs | Meets VIH/VIL thresholds when V− = GND and V+ = +5V ±10%, interfacing seamlessly with microcontrollers and FPGAs. |
| Ultra-low 4μA max supply current | Reduces system standby power by >90% vs. standard comparators-critical for always-on sensor nodes. |
Applications
| Battery Voltage Monitor | Threshold Detector for Sensor Outputs |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during discharge to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against upper (4.2V) and lower (3.0V) thresholds using resistor dividers. Use Value: Enables precise undervoltage/overvoltage protection without external reference or hysteresis components-reducing BOM count by 3–5 parts. |
Use Scenario: Converting analog output from a temperature sensor (e.g., LM35) into digital alert signals. IC Role / Device Role / Timing Role: One comparator detects exceedance of safe operating temperature; second triggers fan activation at higher threshold. Use Value: Delivers sub-10mV detection resolution and 12μs response-fast enough to prevent thermal runaway in motor controllers. |
| Window Comparator for Power Supply Validation | Oscillator Enable Control in Low-Power Systems |
|
Use Scenario: Validating regulated 3.3V supply stays within ±5% tolerance before enabling downstream logic. IC Role / Device Role / Timing Role: Dual-channel comparison against high/low reference voltages derived from precision divider network. Use Value: Achieves <100ppm effective hysteresis via external resistors-rejecting noise spikes that would falsely trip discrete solutions. |
Use Scenario: Enabling crystal oscillator only when main supply reaches stable 3.0V, minimizing startup current surge. IC Role / Device Role / Timing Role: Comparator A monitors VCC; its output enables oscillator enable pin via open-drain interface (with pull-up). Use Value: Cuts system quiescent current to 4μA during wait state-extending shelf life of sealed IoT devices beyond 10 years. |
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; output only sinks current (open-collector). | Suitable for cost-sensitive industrial controls where speed and ultra-low power are secondary. | Choose LM393DR only if board layout accommodates external pull-ups and system can tolerate 25× higher quiescent draw. |
| TLV3702IDR | 350nA max supply current; rail-to-rail inputs/outputs; 360μs propagation delay; requires ≥1.8V supply. | Better for nanowatt-sensor interfaces but too slow for timing-critical edge detection. | Select TLV3702IDR when battery life >10 years is mandatory and response time >300μs is acceptable. |
Compared with LM393DR and TLV3702IDR, the MAX922CSA+ uniquely balances ultra-low 4μA consumption, 12μs speed, and 40mA drive-making it optimal for compact, responsive, long-life detection nodes where both power and performance matter.
Availability
MAX922CSA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and industrial threshold-monitoring systems requiring stable component supply across extended production lifecycles.
Supply support for MAX922CSA+ 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 markets.
The MAX921–MAX924 family was engineered specifically for micropower threshold detection in space-constrained, battery-operated systems-prioritizing sub-5μA operation, rail-sensing capability, and robust output drive without external components.
FAQ
What is the maximum supply voltage for MAX922CSA+ in single-supply operation?
The MAX922CSA+ supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains full specification compliance including 4μA max quiescent current and 12μs propagation delay. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Does MAX922CSA+ include an internal voltage reference?
No, the MAX922CSA+ does not include an internal voltage reference. Unlike MAX921/MAX923, it requires an external reference (e.g., MAX6012, TLV431) or resistor-divider network to establish comparison thresholds-confirmed by ordering table and functional diagrams in the datasheet.
Can MAX922CSA+ operate from a ±3V dual supply?
Yes, MAX922CSA+ operates from dual supplies ranging ±1.25V to ±5.5V. At ±3V, input common-mode range is −3V to +1.7V, output swings −3V to +3V, and quiescent current remains ≤4μA-enabling direct bipolar signal conditioning without level shifting.
What is the purpose of the V− pin on MAX922CSA+?
The V− pin on MAX922CSA+ defines the negative supply rail and serves as the reference for input common-mode range and output swing. In single-supply use, V− must be tied to GND to ensure TTL-compatible output levels and proper input voltage headroom.
Is MAX922CSA+ pin-compatible with other MAX92x variants in SO package?
No, MAX922CSA+ is not pin-compatible with MAX921CSA+ or MAX923CSA+ in the same 8-pin SO package. Pin 5 is INA− on MAX922CSA+, but HYST on MAX923CSA+ and IN− on MAX921CSA+-requiring PCB redesign for substitution.
MAX922CSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- 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-SOIC
MAX922CSA+ FAQ
1.How can I place an order for MAX922CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922CSA+ 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 MAX922CSA+ reliable?
The price and inventory of MAX922CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922CSA+ is usually 5 days.
3.What payment methods are accepted for MAX922CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922CSA+?
MAX922CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922CSA+ 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 MAX922CSA+?
For technical support, including MAX922CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922CSA+ requirements.
6.How does Aetrix verify that MAX922CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX922CSA+ 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 MAX922CSA+ meets industry standards.
7.What is the process for return or replacement of MAX922CSA+?
All MAX922CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX922CSA+, 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 MAX922CSA+ part is unused and in its original packaging.
Return procedure for MAX922CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922CSA+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
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