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Analog Devices Inc./Maxim Integrated MAX923ESA+
- Part No.:
- MAX923ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX923ESA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:363
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Product details
Overview
The MAX923ESA+ from Maxim Integrated is a dual, micropower, low-voltage comparator with internal 1.182V ±1% bandgap reference and programmable hysteresis via HYST pin. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply), draws ≤6µA quiescent current over –40°C to +85°C, and features TTL/CMOS-compatible outputs that source up to 40mA. It is used in battery-powered threshold detection and window comparator circuits requiring rail-to-rail input range and stable reference.
For engineers reviewing the MAX923ESA+ datasheet, MAX923ESA+ pinout, MAX923ESA+ application, or MAX923ESA+ equivalent, key selection considerations include its dual-comparator architecture with shared reference and hysteresis control, guaranteed operation across industrial temperature range, ultra-low supply current at extended VCC, and SO-8 package compatibility with legacy PCB footprints.
Technical Context
The MAX923ESA+ integrates two independent comparators sharing a precision 1.182V reference referenced to V–, enabling consistent threshold generation for both channels. Its HYST pin allows resistor-programmable hysteresis without external feedback, simplifying design of noise-immune detectors.
Input common-mode range extends from V– to (V+ – 1.3V), supporting operation near supply rails. The output stage eliminates crowbar current during transitions, minimizing supply-induced parasitic feedback and improving stability in poorly decoupled layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - supports direct interface with 3V/5V logic and bipolar sensor signals |
| Quiescent Current | ≤6µA over –40°C to +85°C - enables multi-year battery life in always-on monitoring systems |
| Reference Voltage | 1.182V ±1% (0°C to +70°C), ±1.2% (–40°C to +85°C) - provides stable, factory-trimmed threshold baseline for both comparators |
| Propagation Delay | 12µs typical (10mV overdrive, 100pF load) - ensures timely response in fast-acting protection circuits |
| Output Drive | Sources ≥40mA continuously; sinks ≥5mA - directly drives LEDs, small relays, or logic inputs without external buffers |
| Input Offset Voltage | ±10mV max - defines minimum detectable voltage difference between IN+ and IN– |
| Input Common-Mode Range | V– to (V+ – 1.3V) - allows sensing signals down to negative rail and up to within 1.3V of positive rail |
Pinout & Package
MAX923ESA+ is housed in an 8-pin SO (Small Outline) package, surface-mount, JEDEC MS-012AC compliant, 3.9mm × 4.9mm body, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connects to V– for single-supply operation; output swings from V+ to GND |
| 2 | V– | Negative supply terminal; tied to GND in single-supply mode; defines reference point for REF and input common-mode range |
| 3 | INB– | Inverting input of Comparator B; accepts signals from V– to (V+ – 1.3V) |
| 4 | INA+ | Noninverting input of Comparator A; high-impedance node (<5nA leakage) for precision threshold setting |
| 5 | INB+ | Noninverting input of Comparator B; electrically identical to INA+, supports independent dual-channel sensing |
| 6 | HYST | Hysteresis control input; voltage range = REF – 50mV to REF - sets hysteresis band width via external resistors |
| 7 | REF | 1.182V reference output referenced to V–; sources/sinks µA-level current; must not be bypassed |
| 8 | V+ | Positive supply input; supports up to +11V; powers both comparators and reference circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Enables matched threshold generation for window detection using one precision reference instead of two discrete references |
| Resistor-programmable hysteresis (HYST pin) | Eliminates need for external positive-feedback networks; reduces component count and layout sensitivity in noisy environments |
| No crowbar output switching current | Prevents supply-line glitches during output transitions, removing requirement for heavy local bypassing on V+ and V– |
| Rail-to-rail input capability | Accepts signals from V– to within 1.3V of V+, allowing direct connection to sensors or DACs without level-shifting circuitry |
| 40mA continuous output source current | Drives LEDs, optocouplers, or logic gates directly - avoids external driver transistors in low-power indicator or enable circuits |
Applications
| Battery-Powered Threshold Detector | Window Comparator (Undervoltage/Overvoltage) |
|---|---|
Use Scenario: Monitoring lithium-ion cell voltage during charging/discharging to trigger cutoff at 2.8V (UVLO) and 4.3V (OVLO). IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against two thresholds derived from REF and resistor dividers; OUTA and OUTB provide active-low UVLO/OVLO flags. Use Value: Ultra-low 6µA supply current extends battery runtime; internal reference eliminates calibration drift; hysteresis prevents chatter near trip points. | Use Scenario: Validating 5V system supply in industrial PLC I/O modules, asserting "POWER GOOD" only when voltage stays within 4.5V–5.5V window. IC Role / Device Role / Timing Role: MAX923ESA+ implements two independent thresholds using shared REF; AND-gated outputs generate clean power-good signal. Use Value: Single IC replaces two discrete comparators + reference; SO-8 footprint simplifies layout; hysteresis programmed via HYST pin ensures stable window edges. |
| Oscillator Circuit (Relaxation) | Auto-Off Power Switch |
Use Scenario: Generating precise timing pulses in low-power sensor wake-up circuits using RC-based relaxation oscillator. IC Role / Device Role / Timing Role: One comparator acts as Schmitt trigger with capacitor feedback; HYST pin sets hysteresis band to define frequency-determining thresholds. Use Value: No external reference needed - internal 1.182V REF sets oscillation amplitude; low supply current minimizes oscillator's own power burden. | Use Scenario: Enabling a 40mA load (e.g., microcontroller subsystem) for fixed duration after button press, then auto-shutting down. IC Role / Device Role / Timing Role: Comparator monitors RC voltage ramp; output drives load directly; hysteresis prevents premature turn-off during slow ramp decay. Use Value: 40mA output drive eliminates external MOSFET; 6µA quiescent current ensures negligible standby drain; HYST pin simplifies timing accuracy tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | No internal reference; requires external voltage divider or reference IC; higher 1mA supply current; no HYST pin - hysteresis requires external feedback resistors | Not suitable for space-constrained or ultra-low-power designs where reference integration and hysteresis simplicity are critical | Select LM393DR only if cost is primary concern and external reference/hysteresis circuitry is acceptable |
| TLV3702IDR | Lower 1.2µA supply current but no integrated reference; rail-to-rail input/output; 36V max supply; no HYST pin | Requires separate reference IC (e.g., TLV431) and external hysteresis network; better for high-voltage or ultra-low-IQ cases where reference is already present | Choose TLV3702IDR when system already includes a precision reference and layout area permits external hysteresis components |
Compared with LM393DR and TLV3702IDR, the MAX923ESA+ uniquely combines dual comparators, precision reference, and HYST-controlled hysteresis in one SO-8 package - reducing BOM count, PCB area, and design complexity for battery-powered threshold detection.
Availability
MAX923ESA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply and industrial-temperature operation.
Supply support for MAX923ESA+ 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 developed specifically for ultra-low-power, single/dual-supply comparator applications demanding integrated reference, programmable hysteresis, and robust output drive - targeting portable instrumentation and energy-harvesting systems.
FAQ
What is the operating temperature range for the MAX923ESA+?
The MAX923ESA+ is rated for –40°C to +85°C (industrial temperature range), as indicated by the "E" suffix in the part number. This range is validated per datasheet Electrical Characteristics tables, with guaranteed performance including ≤6µA supply current, ±10mV input offset, and 1.182V ±1.2% reference accuracy across the full span.
Does the MAX923ESA+ require external hysteresis components?
No - the MAX923ESA+ includes a dedicated HYST pin enabling resistor-programmable hysteresis without external feedback. Connecting two resistors between REF, HYST, and V– sets the hysteresis band (up to 100mV). This eliminates the need for external op-amp feedback networks and reduces layout sensitivity compared to standard comparators like LM393.
Can the MAX923ESA+ operate from a 3V single supply?
Yes - the MAX923ESA+ supports single-supply operation from +2.5V to +11V. At V+ = 3V, it maintains full functionality: input common-mode range from V– (GND) to 1.7V, 12µs propagation delay (10mV overdrive), and 40mA output source capability. Supply current increases slightly to ~5.8µA (typical) at 3V, remaining well within ultra-low-power specifications.
What is the function of the REF pin on the MAX923ESA+?
REF is the output of an internal 1.182V ±1% bandgap voltage reference, referenced to V– (not GND). It provides a stable, factory-trimmed voltage for generating precise thresholds for both comparators. The pin sources up to 25µA and sinks up to 15µA at +25°C, and must not be bypassed with capacitors to avoid instability per datasheet guidance.
How does the MAX923ESA+ differ from the MAX921ESA+?
The MAX923ESA+ contains two comparators (OUTA and OUTB) with shared REF and HYST pins, while the MAX921ESA+ is a single comparator. Both share identical reference accuracy, supply current, and hysteresis architecture. The MAX923ESA+ enables dual-threshold functions (e.g., window detection) in one SO-8 package, whereas MAX921ESA+ requires two units for equivalent functionality - increasing cost and board area.
MAX923ESA+ 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:
- with Voltage Reference
- 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):
- 7.5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX923ESA+ FAQ
1.How can I place an order for MAX923ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923ESA+ 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 MAX923ESA+ reliable?
The price and inventory of MAX923ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923ESA+ is usually 5 days.
3.What payment methods are accepted for MAX923ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923ESA+?
MAX923ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923ESA+ 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 MAX923ESA+?
For technical support, including MAX923ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923ESA+ requirements.
6.How does Aetrix verify that MAX923ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX923ESA+ 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 MAX923ESA+ meets industry standards.
7.What is the process for return or replacement of MAX923ESA+?
All MAX923ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX923ESA+, 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 MAX923ESA+ part is unused and in its original packaging.
Return procedure for MAX923ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923ESA+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP USA Inc.
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