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Analog Devices Inc./Maxim Integrated MAX922EPA+
- Part No.:
- MAX922EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX922EPA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:499
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Product details
Overview
The MAX922EPA+ from Maxim Integrated is a dual ultra-low-power voltage comparator with no internal reference and no programmable hysteresis, operating from +2.5V to +11V (single supply) or ±1.25V to ±5.5V (dual supply), drawing ≤4μA quiescent current over –40°C to +85°C, featuring rail-to-rail input range (V– to V+ – 1.3V), TTL/CMOS-compatible outputs that both sink and source current, and used in battery-powered threshold detection circuits.
For engineers reviewing the MAX922EPA+ datasheet, MAX922EPA+ pinout, MAX922EPA+ application, or MAX922EPA+ equivalent, key selection criteria include supply current at extended temperature, output swing compatibility with V– (not GND), absence of internal reference, dual-comparator independence, and suitability for low-noise, low-power analog monitoring in portable instrumentation and industrial sensors.
Technical Context
The MAX922EPA+ contains two independent comparators with matched input offset voltage (±10mV max), common-mode input range extending from V– to (V+ – 1.3V), and output stages capable of continuous 40mA sourcing and >5mA sinking without crowbar current. Its inputs tolerate ±0.3V beyond supply rails, and propagation delay is 12μs (typical, 10mV overdrive).
No internal voltage reference or HYST pin is present - hysteresis must be implemented externally via positive feedback. Output logic levels are referenced to V–, not GND, enabling true dual-supply operation where V– may be negative; output high = V+ – 0.4V, output low = V– + 0.4V (C/E temp ranges, IOUT = 1.8mA).
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 battery-powered and bipolar-signal systems without level-shifting. |
| Quiescent Supply Current | ≤4μA over –40°C to +85°C - enables multi-year operation on coin-cell batteries in always-on sensor nodes. |
| Input Offset Voltage | ±10mV max - ensures reliable detection of small differential signals (e.g., thermistor or RTD bridges) without calibration. |
| Propagation Delay | 12μs typical (10mV overdrive, 100pF load) - suitable for medium-speed window detection and oscillator timing below 50kHz. |
| Output Drive Capability | 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 ground or negative rails in single- and dual-supply configurations. |
| Output Voltage Swing | High: V+ – 0.4V; Low: V– + 0.4V (IOUT = 1.8mA) - guarantees TTL/CMOS compatibility when V– = GND and V+ = 5V. |
Pinout & Package
MAX922EPA+ uses an 8-pin plastic DIP package (0.300" wide), with lead finish Pb-free per JEDEC J-STD-020, RoHS compliant, and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output - sinks and sources current; swings from V+ to V–; requires external pull-up only if open-drain behavior is needed. |
| 2 | V+ | Positive supply rail - accepts up to +11V (single) or +5.5V (dual); decoupling capacitor recommended for noisy supplies. |
| 3 | INB+ | Noninverting input of comparator B - high-impedance (±0.01nA leakage), compatible with high-value resistor dividers. |
| 4 | INB– | Inverting input of comparator B - identical electrical characteristics to INB+; supports differential or single-ended configurations. |
| 5 | INA– | Inverting input of comparator A - electrically isolated from comparator B; enables independent dual-threshold detection. |
| 6 | INA+ | Noninverting input of comparator A - matches INB± performance; usable with external hysteresis networks on either input pair. |
| 7 | V– | Negative supply rail - connected to GND in single-supply mode; defines output low level and reference for input common-mode range. |
| 8 | OUTA | Comparator A output - fully independent of OUTB; same drive strength and voltage swing as OUTB. |
Key Features
| Feature | Design Value |
|---|---|
| No internal reference or HYST pin | Enables full design flexibility: external hysteresis networks can be tailored per channel, avoiding fixed reference drift or shared hysteresis coupling. |
| Rail-to-rail input range (V– to V+ – 1.3V) | Allows direct interface to sensors operating at or near supply rails - e.g., current-sense amplifiers, thermocouples, or shunt-based monitors. |
| 40mA continuous output source current | Eliminates need for external driver transistors in LED indicators, solenoid triggers, or logic-level translation to 3.3V/5V microcontrollers. |
| No crowbar switching current | Prevents supply-line glitches during output transitions - critical for mixed-signal systems sharing power rails with ADCs or RF sections. |
| Low 12μs propagation delay (10mV overdrive) | Supports stable oscillation in relaxation oscillator designs and fast response in overvoltage/undervoltage lockout (OVLO/UVLO) circuits. |
Applications
| Battery-Powered Threshold Detector | Window Comparator System |
|---|---|
|
Use Scenario: Monitoring lithium-ion cell voltage during charging/discharging to trigger cutoff at 4.25V (overvoltage) and 2.8V (undervoltage). IC Role / Device Role / Timing Role: Dual comparator independently comparing divided battery voltage against two precision thresholds generated by resistor networks. Use Value: Enables accurate, low-quiescent-current protection without external reference ICs or op-amps - extends battery life by >30% vs. standard comparator solutions. |
Use Scenario: Detecting valid 3.3V system supply within ±5% tolerance (3.135V–3.465V) in industrial PLC I/O modules. IC Role / Device Role / Timing Role: One comparator monitors upper limit, the other lower limit; outputs combined via external AND gate to generate POWER_GOOD signal. Use Value: Provides fail-safe power supervision with <4μA total supply current - eliminates need for dedicated supervisor ICs in space-constrained designs. |
| Oscillator Circuit (Relaxation Type) | Sensor Signal Conditioning |
|
Use Scenario: Generating precise 10kHz clock signal using RC timing network and hysteresis feedback around one comparator channel. IC Role / Device Role / Timing Role: Comparator acts as Schmitt trigger with externally set hysteresis; second channel unused or reserved for fault flag. Use Value: Achieves stable frequency stability (<2% variation over temperature) with only two resistors and one capacitor - reduces BOM count vs. crystal-based solutions. |
Use Scenario: Converting slow-moving analog signals from pressure or humidity sensors into clean digital alerts for MCU wake-up. IC Role / Device Role / Timing Role: Comparator compares conditioned sensor output to fixed threshold; output directly interfaces to microcontroller interrupt pin. Use Value: Delivers sub-10μA system standby current while maintaining responsive wake-up latency - essential for IoT edge nodes with multi-year battery goals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393MX/NOPB | Higher 100μA supply current; no rail-to-rail inputs; output only sinks current; no V– pin - requires pull-up resistors. | Not suitable for dual-supply operation or ultra-low-power battery systems; acceptable for cost-sensitive 5V board-level monitoring. | Select MAX922EPA+ when supply current <5μA or dual-supply capability is required; choose LM393MX/NOPB only for legacy 5V-only designs with relaxed power budgets. |
| TLV3702IDR | Lower 800nA supply current; rail-to-rail inputs/outputs; includes internal ESD protection; SO-8 package only - no DIP option. | Superior for sub-1μA systems but lacks V– pin - cannot operate with negative supplies; unsuitable for bipolar signal conditioning. | Choose TLV3702IDR for ultra-low-power single-supply apps where DIP packaging is unnecessary; retain MAX922EPA+ when V– referenced operation or through-hole assembly is mandatory. |
Compared with LM393MX/NOPB and TLV3702IDR, the MAX922EPA+ uniquely balances ultra-low quiescent current (≤4μA), true dual-supply support via explicit V– pin, and robust 40mA sourcing - making it the only option among the three for battery-powered, bipolar-input, through-hole sensor interfaces requiring long-term reliability.
Availability
MAX922EPA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.
Supply support for MAX922EPA+ 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) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX921–MAX924 family was designed specifically for ultra-low-power, wide-supply-range comparator functions in portable and harsh-environment systems - prioritizing micropower operation, rail-to-rail inputs, and robust output drive without compromising speed or accuracy.
FAQ
What is the maximum supply voltage for MAX922EPA+ in single-supply operation?
The MAX922EPA+ supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains ≤4μA quiescent current over –40°C to +85°C and delivers full 40mA output sourcing capability. Exceeding +11V risks permanent damage per Absolute Maximum Ratings.
Does MAX922EPA+ include an internal voltage reference?
No, the MAX922EPA+ does not include an internal voltage reference. Unlike MAX921/MAX923, it lacks a REF pin and bandgap reference circuitry. External reference ICs or resistor-divider networks must be used to establish comparison thresholds for the MAX922EPA+.
Can MAX922EPA+ operate with a negative supply voltage?
Yes, the MAX922EPA+ supports dual-supply operation from ±1.25V to ±5.5V. Its V– pin serves as the negative rail, and both inputs and outputs are fully specified relative to V– - enabling direct interfacing with bipolar sensor signals such as accelerometers or audio preamps.
What is the output configuration of MAX922EPA+?
The MAX922EPA+ features push-pull (totem-pole) outputs on both OUTA and OUTB pins - each capable of sourcing up to 40mA continuously and sinking >5mA. No external pull-up resistors are required unless open-drain behavior is intentionally desired via external circuitry.
How is hysteresis implemented on MAX922EPA+?
Hysteresis on MAX922EPA+ must be added externally using positive feedback - typically a resistor network from output to noninverting input. The device has no HYST pin. Design equations and example values are provided in the MAX921–MAX924 datasheet Figure 4 and Applications Information section.
MAX922EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-PDIP
MAX922EPA+ FAQ
1.How can I place an order for MAX922EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922EPA+ 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 MAX922EPA+ reliable?
The price and inventory of MAX922EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922EPA+ is usually 5 days.
3.What payment methods are accepted for MAX922EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922EPA+?
MAX922EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922EPA+ 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 MAX922EPA+?
For technical support, including MAX922EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922EPA+ requirements.
6.How does Aetrix verify that MAX922EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX922EPA+ 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 MAX922EPA+ meets industry standards.
7.What is the process for return or replacement of MAX922EPA+?
All MAX922EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX922EPA+, 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 MAX922EPA+ part is unused and in its original packaging.
Return procedure for MAX922EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922EPA+ Tags
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