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Analog Devices Inc./Maxim Integrated MAX922ESA-T
- Part No.:
- MAX922ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX922ESA-T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,481
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Product details
Overview
MAX922ESA-T from Maxim Integrated is a dual ultra-low-power voltage comparator with no internal reference or hysteresis, operating from +2.5V to +11V (or ±1.25V to ±5.5V), drawing ≤4μA supply current over –40°C to +85°C, featuring TTL/CMOS-compatible outputs that source/sink current and input common-mode range extending to within 1.3V of V+. It is used in battery-powered threshold detection where dual independent comparisons are required without shared reference.
For engineers reviewing the MAX922ESA-T datasheet, MAX922ESA-T pinout, MAX922ESA-T application, or MAX922ESA-T equivalent, this page delivers verified electrical parameters, SO-8 package details, dual-comparator timing behavior, output drive capability, and validated alternative options for low-quiescent-current sensing designs.
Technical Context
The MAX922ESA-T implements two independent micropower comparators with rail-to-rail input capability (V− to V+ − 1.3V) and output swing from V+ to V−, enabling true dual-supply operation without ground pin. Its output stage continuously sources up to 40mA while avoiding crowbar current during transitions, minimizing supply-line parasitic feedback.
No internal voltage reference or hysteresis circuitry is integrated-unlike MAX921/MAX923-so external reference and positive-feedback hysteresis networks must be implemented. Input offset voltage is ±10mV max, and propagation delay is 12μs typical (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 both battery-powered and bipolar signal monitoring systems |
| Quiescent Supply Current | ≤4μA over –40°C to +85°C - enables multi-year operation on coin-cell batteries in always-on sensors |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct interfacing to signals near supply rails without level-shifting |
| Propagation Delay | 12μs typical at 10mV overdrive, 100pF load - suitable for medium-speed threshold detection (e.g., power-good sequencing) |
| Output Drive Capability | Sources ≥40mA continuously, sinks ≥5mA - drives LEDs, small relays, or logic inputs directly without buffer stages |
| Input Offset Voltage | ±10mV maximum - sets minimum detectable differential voltage in precision threshold applications |
| Input Leakage Current | ±0.01nA to ±5nA (–40°C to +85°C) - preserves accuracy in high-impedance sensor interfaces (e.g., photodiode, thermistor dividers) |
Pinout & Package
MAX922ESA-T is housed in an 8-pin SO (Small Outline) package, surface-mount, 150mil width, JEDEC MS-012AC compliant, with standard lead finish and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output - open-collector compatible, swings V+ to V−, sinks and sources current |
| 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), accepts signals up to V+ − 1.3V |
| 4 | INB− | Inverting input of comparator B - matched to INB+, enables differential or single-ended threshold comparison |
| 5 | INA− | Inverting input of comparator A - electrically isolated from comparator B inputs; supports independent thresholds |
| 6 | INA+ | Noninverting input of comparator A - identical electrical characteristics to INB+, usable for dual independent detectors |
| 7 | V− | Negative supply input - connect to GND for single supply; required for dual-supply operation and defines output swing floor |
| 8 | OUTA | Comparator A output - fully independent of OUTB, same sourcing/sinking capability and voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Two fully separate channels with no shared reference or hysteresis - enables simultaneous high/low window detection using external resistive dividers |
| Ultra-low quiescent current | ≤4μA over full industrial temperature range - reduces battery drain in portable medical monitors and IoT endpoint sensors |
| Rail-to-rail input range | V− to V+ − 1.3V - eliminates need for input biasing in single-supply systems monitoring near-rail signals (e.g., Li-ion battery voltage) |
| High-output drive without crowbar | 40mA continuous source, zero crowbar current during switching - prevents supply glitches in noise-sensitive analog subsystems |
| TTL/CMOS-compatible output | Swings V+ to V− with defined VOH/VOL under load - interfaces directly to microcontroller GPIOs or logic gates without level translators |
Applications
| Battery Voltage Monitor | Power-Good Sequencer |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage across charge/discharge cycles in wearables to trigger low-battery alerts and prevent deep discharge. IC Role / Device Role / Timing Role: Dual comparator independently compares cell voltage against upper (4.2V) and lower (3.0V) thresholds using resistor dividers and external reference. Use Value: Enables precise undervoltage/overvoltage lockout with <4μA system standby current - extends battery life by >30% versus standard comparators. |
Use Scenario: Validating correct power-up sequence of multiple rails (e.g., 5V → 3.3V → 1.2V) in FPGA-based edge AI modules before releasing reset. IC Role / Device Role / Timing Role: Each comparator verifies one rail's stability; outputs feed AND gate to generate final "power-good" signal. Use Value: Eliminates need for dedicated supervisor ICs - reduces BOM count and PCB area while maintaining <12μs response to rail faults. |
| Oscillator Timing Element | Industrial Sensor Threshold Detector |
|
Use Scenario: Building relaxation oscillator in PLC I/O modules where timing stability is secondary to ultra-low power consumption. IC Role / Device Role / Timing Role: One comparator acts as Schmitt trigger with RC network on INA+/INA−; second comparator unused or repurposed. Use Value: Achieves ~1Hz oscillation with <5μA total current - suitable for periodic wake-up of sleep-mode microcontrollers in remote telemetry nodes. |
Use Scenario: Detecting smoke detector alarm threshold in battery-backed fire alarm panels requiring 10-year shelf life. IC Role / Device Role / Timing Role: Comparator A triggers alarm when photoelectric sensor output exceeds preset level; comparator B validates backup battery voltage. Use Value: Dual-channel integration avoids two discrete comparators - cuts layout complexity and ensures matched tempcos across both detection paths. |
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 only outputs, ±15mV offset | Not suitable for sub-10μA battery systems; requires pull-up resistors and external reference for precision thresholds | Select when cost is primary constraint and supply current >50μA is acceptable |
| TLV3702IDR | 3.6μA supply current, rail-to-rail inputs/outputs, built-in 1.2V reference option (TLV3702IR), but no dual-supply support | Requires single-supply design; reference option simplifies layout but lacks MAX922ESA-T's V− referenced output swing | Select for space-constrained single-supply systems needing integrated reference and lower offset (±3mV) |
Compared with LM393DR and TLV3702IDR, MAX922ESA-T uniquely supports true dual-supply operation with V−-referenced outputs and guarantees ≤4μA current across –40°C to +85°C - making it optimal for industrial battery monitors where supply flexibility and ultra-low power are jointly critical.
Availability
MAX922ESA-T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with guaranteed long-term availability and extended temperature performance.
Supply support for MAX922ESA-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX921–MAX924 family was designed specifically for ultra-low-power sensing and threshold detection in energy-constrained systems, emphasizing micropower operation, robust output drive, and flexible supply architecture.
FAQ
What is the maximum supply voltage for MAX922ESA-T in single-supply operation?
The MAX922ESA-T supports a single-supply voltage range of +2.5V to +11V. At +11V, it maintains ≤4μA quiescent current and full functionality across –40°C to +85°C. Exceeding +11V risks permanent damage per Absolute Maximum Ratings. The device does not require a minimum load or external capacitor for stability at maximum voltage.
Does MAX922ESA-T include an internal voltage reference?
No, MAX922ESA-T does not include an internal voltage reference. Unlike MAX921/MAX923, it provides only dual comparators with no reference output (REF) or hysteresis control (HYST) pins. External reference ICs or resistor-divider networks must be used to establish threshold voltages for either comparator channel.
Can MAX922ESA-T operate from dual supplies like ±5V?
Yes, MAX922ESA-T operates from dual supplies ranging from ±1.25V to ±5.5V. In this configuration, V+ connects to +5V, V− connects to –5V, and outputs swing from +5V to –5V - enabling direct interface with bipolar analog signals without level shifting. GND is not used or connected.
What is the output voltage swing specification for MAX922ESA-T?
MAX922ESA-T outputs swing from V+ to V− under load. With V+ = +5V and V− = 0V (single supply), VOH ≥ +4.6V (at 10mA sink), VOL ≤ +0.4V (at 0.8mA source). With V+ = +5V and V− = –5V (dual supply), VOH ≥ +4.6V and VOL ≤ –4.6V - ensuring TTL/CMOS compatibility in both configurations.
Is MAX922ESA-T pin-compatible with other devices in the MAX92x family?
No, MAX922ESA-T is not pin-compatible with MAX921ESA-T or MAX923ESA-T. While all use 8-pin SO packages, pin functions differ: MAX922ESA-T has no REF or HYST pins and assigns INB+/INB−/INA−/INA+ to pins 3–6, whereas MAX921ESA-T uses those pins for REF/HYST/IN+/IN−. PCB layout must be specific to MAX922ESA-T.
MAX922ESA-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:
- 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:
- Surface Mount
- :
- 8-SOIC
MAX922ESA-T FAQ
1.How can I place an order for MAX922ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX922ESA-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 MAX922ESA-T reliable?
The price and inventory of MAX922ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX922ESA-T is usually 5 days.
3.What payment methods are accepted for MAX922ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX922ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX922ESA-T?
MAX922ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX922ESA-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 MAX922ESA-T?
For technical support, including MAX922ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX922ESA-T requirements.
6.How does Aetrix verify that MAX922ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX922ESA-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 MAX922ESA-T meets industry standards.
7.What is the process for return or replacement of MAX922ESA-T?
All MAX922ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX922ESA-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 MAX922ESA-T part is unused and in its original packaging.
Return procedure for MAX922ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX922ESA-T Tags
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