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Analog Devices Inc./Maxim Integrated MAX922MSA/PR-T
- Part No.:
- MAX922MSA/PR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX922MSA/PR-T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
MAX922MSA/PR-T from Maxim Integrated is a dual micropower comparator with TTL/CMOS-compatible outputs, 4μA max supply current over temperature, no internal voltage reference, and rail-to-rail input operation down to V− and within 1.3V of V+. It serves as a low-power threshold detector in battery-powered instrumentation and sensor interfaces.
For engineers reviewing the MAX922MSA/PR-T datasheet, MAX922MSA/PR-T pinout, MAX922MSA/PR-T application, or MAX922MSA/PR-T equivalent, this page delivers verified specifications, military-grade −55°C to +125°C operation, SO-8 package details, and real-world comparator selection guidance for precision, low-quiescent designs.
Technical Context
The MAX922MSA/PR-T integrates two independent comparators with continuous 40mA output source capability and no crowbar current during transitions-eliminating supply-line glitches and parasitic feedback. Its input common-mode range extends from V− to (V+ − 1.3V), supporting single-supply operation from +2.5V to +11V or dual supplies from ±1.25V to ±5.5V.
Unlike MAX921/MAX923, it lacks an internal reference and HYST pin; hysteresis must be implemented externally via positive feedback. Output swing is rail-to-rail between V+ and V−, requiring V− connection to GND for TTL compatibility in single-supply +5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | ≤4μA over −55°C to +125°C - enables multi-year battery life in remote sensors |
| Input Common-Mode Range | V− to (V+ − 1.3V) - supports direct sensing near ground or rail in 3V/5V systems |
| Propagation Delay | 12μs at 10mV overdrive - suitable for medium-speed window detection and oscillator timing |
| Output Drive | 40mA continuous source, >5mA sink - directly drives LEDs, logic inputs, or small relays without buffers |
| Supply Voltage Range | +2.5V to +11V single or ±1.25V to ±5.5V dual - flexible for industrial and automotive power domains |
| Input Offset Voltage | ±10mV - sets minimum detectable differential for precision thresholding |
| Input Leakage Current | ±0.01nA to ±5nA (C/E temp) - preserves accuracy in high-impedance sensor interfaces |
Pinout & Package
MAX922MSA/PR-T is housed in an 8-pin SO (Small Outline) package rated for −55°C to +125°C operation. Pin 1 is OUTB, Pin 2 is V+, Pin 3 is INB+, Pin 4 is INB−, Pin 5 is INA−, Pin 6 is INA+, Pin 7 is V−, Pin 8 is OUTA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks and sources current between V+ and V− |
| 2 | V+ | Positive supply rail; accepts +2.5V to +11V or +5.5V in dual-supply mode |
| 3 | INB+ | Noninverting input of comparator B; supports rail-to-rail common-mode range |
| 4 | INB− | Inverting input of comparator B; matched offset and leakage with INB+ |
| 5 | INA− | Inverting input of comparator A; electrically identical to INB− |
| 6 | INA+ | Noninverting input of comparator A; used with external hysteresis resistors |
| 7 | V− | Negative supply terminal; connect to GND for single-supply TTL operation |
| 8 | OUTA | Comparator A output; fully independent of OUTB, same drive strength |
Key Features
| Feature | Design Value |
|---|---|
| No internal reference | Enables use with external precision references or custom thresholds without reference loading |
| Rail-to-rail input stage | Accepts signals from V− to V+ − 1.3V - eliminates level-shifting in low-voltage sensor front-ends |
| 40mA continuous output source | Drives multiple CMOS inputs, LEDs, or optocouplers directly - reduces BOM count |
| No crowbar current | Prevents supply-line transients during output switching - improves system stability without extra bypassing |
| Military temperature grade | Qualified from −55°C to +125°C - suitable for avionics, downhole tools, and engine control units |
Applications
| Battery-Powered Threshold Detector | Window Comparator System |
|---|---|
Use Scenario: Monitoring battery voltage in portable medical devices to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Dual comparator implements upper and lower trip points using resistor dividers and external hysteresis. Use Value: 4μA quiescent current extends battery life; rail-to-rail inputs accurately sense near-ground voltages without bias networks. |
Use Scenario: Detecting out-of-spec supply rails in industrial PLC I/O modules to prevent erroneous actuation. IC Role / Device Role / Timing Role: One comparator monitors undervoltage, the other overvoltage; outputs ANDed for "power-good" status. Use Value: Independent outputs enable discrete fault reporting; 12μs propagation delay ensures timely response to supply faults. |
| Oscillator Circuit | Sensor Interface with Hysteresis |
Use Scenario: Building relaxation oscillators in low-power environmental data loggers using RC timing and comparator feedback. IC Role / Device Role / Timing Role: Comparator acts as Schmitt trigger with externally programmed hysteresis to define frequency-determining thresholds. Use Value: No internal reference avoids fixed 1.182V constraint; 40mA drive sustains oscillation into capacitive loads up to 100pF. |
Use Scenario: Converting analog sensor outputs (e.g., thermistor, photodiode) into clean digital signals in noisy factory environments. IC Role / Device Role / Timing Role: Comparator provides noise-immune digitization via user-defined hysteresis band set by external resistors. Use Value: ±10mV offset and <5nA input leakage preserve signal integrity; SO-8 package supports compact PCB layout near sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393AMX/NOPB | Higher 100μA supply current; no rail-to-rail inputs; open-collector outputs only | Requires pull-up resistors and external hysteresis; unsuitable for ultra-low-power or rail-sensing designs | Select when cost is primary and 4μA quiescent current is not required |
| TLV3702IDR | 2.5μA supply current; rail-to-rail inputs/outputs; integrated 1.2V reference option (TLV3702IR) | Reference version adds internal reference but lacks HYST pin; SO-8 footprint differs (pin 1 = IN−) | Select for lower IQ or integrated reference needs-but verify pinout compatibility and reference dependency |
Compared with LM393AMX/NOPB and TLV3702IDR, MAX922MSA/PR-T uniquely combines military-temperature SO-8 packaging, 40mA source drive, and guaranteed rail-to-rail input operation below 1.3V from V+, making it optimal for ruggedized, low-power dual-threshold systems where supply headroom is constrained.
Availability
MAX922MSA/PR-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor interfaces, and aerospace power monitoring requiring stable component supply across extreme temperatures.
Supply support for MAX922MSA/PR-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 demanding industrial, automotive, and communications applications.
The MAX921–MAX924 family was engineered for ultra-low-power, wide-supply comparator functions in space-constrained, long-life systems-emphasizing micropower operation, robust output drive, and rail-sensing capability without external biasing.
FAQ
What is the operating temperature range of the MAX922MSA/PR-T?
The MAX922MSA/PR-T is specified for −55°C to +125°C operation, meeting MIL-STD-883 requirements for extended temperature reliability. This range is confirmed in the Ordering Information table and supported by electrical characteristics tested across the full span. The "MSA/PR-T" suffix explicitly denotes the military-grade SO-8 variant of the MAX922MSA/PR-T.
Does the MAX922MSA/PR-T include an internal voltage reference?
No, the MAX922MSA/PR-T does not include an internal voltage reference. Unlike the MAX921 and MAX923, its product matrix explicitly lists "No" under INTERNAL 1% PRECISION REFERENCE. Users must supply external reference voltages or use resistor dividers tied to V+ or V− when setting thresholds for the MAX922MSA/PR-T.
Can the MAX922MSA/PR-T operate from a single 3.3V supply?
Yes, the MAX922MSA/PR-T operates from a single +2.5V to +11V supply, including 3.3V. Input common-mode range extends from V− (GND) to V+ − 1.3V (2.0V), allowing valid sensing across most of the 3.3V rail. Output swings from V+ to V−, so connecting V− to GND yields TTL/CMOS-compatible logic levels.
How is hysteresis implemented on the MAX922MSA/PR-T?
Hysteresis on the MAX922MSA/PR-T requires external positive feedback using two resistors per comparator, as described in Figure 4 of the datasheet. Since the device lacks a HYST pin, hysteresis is added by feeding a portion of the output back to the noninverting input-unlike the MAX921/MAX923 which support internal hysteresis via the HYST pin.
What is the maximum continuous output source current of the MAX922MSA/PR-T?
The MAX922MSA/PR-T continuously sources up to 40mA per output (OUTA or OUTB), as stated in the General Description and confirmed in Typical Operating Characteristics. This is sustained without thermal derating at TA ≤ +70°C in the SO-8 package, enabling direct drive of LEDs, logic gates, or small solenoids without external buffers.
MAX922MSA/PR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- 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):
- -
- Current - Output (Typ):
- 3.2µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX922MSA/PR-T FAQ
1.How can I place an order for MAX922MSA/PR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922MSA/PR-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 MAX922MSA/PR-T reliable?
The price and inventory of MAX922MSA/PR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922MSA/PR-T is usually 5 days.
3.What payment methods are accepted for MAX922MSA/PR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922MSA/PR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922MSA/PR-T?
MAX922MSA/PR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922MSA/PR-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 MAX922MSA/PR-T?
For technical support, including MAX922MSA/PR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922MSA/PR-T requirements.
6.How does Aetrix verify that MAX922MSA/PR-T is sourced from the original manufacturer or authorized distributors?
All MAX922MSA/PR-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 MAX922MSA/PR-T meets industry standards.
7.What is the process for return or replacement of MAX922MSA/PR-T?
All MAX922MSA/PR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX922MSA/PR-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 MAX922MSA/PR-T part is unused and in its original packaging.
Return procedure for MAX922MSA/PR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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