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Analog Devices Inc./Maxim Integrated MAX992EKA-T
- Part No.:
- MAX992EKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX992EKA-T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,702
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Product details
Overview
MAX992EKA-T from Maxim Integrated is a dual, micropower, rail-to-rail input/output comparator with open-drain outputs, operating from +2.5V to +5.5V single supply or ±1.25V to ±2.75V dual supplies. It delivers 120ns propagation delay, 48μA per comparator quiescent current, and ±2.5mV internal hysteresis - optimized for level translation and zero-crossing detection in portable instrumentation and battery-powered sensor interfaces.
For engineers reviewing the MAX992EKA-T datasheet, MAX992EKA-T pinout, MAX992EKA-T application, or MAX992EKA-T equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative comparators with documented functional and interface differences.
Technical Context
The MAX992EKA-T implements two independent high-speed comparators sharing a common VCC and VEE supply domain, each featuring rail-to-rail inputs extending 250mV beyond the rails and an open-drain output stage rated for up to +6V above VEE. Its internal hysteresis eliminates oscillation on slow-moving signals without external components.
Unlike push-pull comparators, the MAX992EKA-T's open-drain architecture requires an external pullup resistor, enabling bidirectional voltage-level translation (e.g., 5V logic to 3V I/O) and compatibility with mixed-supply systems. Output leakage remains ≤1.0μA at high state, supporting low-power wake-up circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply; ±1.25V to ±2.75V dual supply - supports both 3V and 5V system integration without level-shifting circuitry. |
| Propagation Delay | 120ns at 100mV overdrive (CL = 15pF, VCC = 5V) - enables precise timing in fast threshold-detection applications like pulse-width monitoring. |
| Quiescent Current | 48μA per comparator at VCC = 2.7V, TA = +25°C - extends battery life in always-on sensor nodes and portable medical devices. |
| Input Offset Voltage | ±0.5mV typical (±7mV max over -40°C to +85°C) - ensures accurate trip-point stability across temperature in precision threshold detectors. |
| Common-Mode Input Range | VEE − 0.25V to VCC + 0.25V - allows direct sensing of signals referenced to ground or supply rails without attenuation networks. |
| Output Voltage Range | Open-drain: OUT can be pulled up to 6V above VEE - enables safe interfacing with higher-voltage logic families or isolated domains. |
| Input Bias Current | 1.0pA typical - minimizes loading error on high-impedance sources such as thermocouples or photodiode amplifiers. |
Pinout & Package
MAX992EKA-T is housed in an 8-pin μMAX® package (U8-1), measuring 3.0mm × 3.0mm × 1.1mm with exposed pad for thermal enhancement. The package is RoHS-compliant and designed for high-density PCB layouts in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Open-drain output of Comparator A - requires external pullup; sinks current when active; compatible with 3V/5V logic domains. |
| 2 | INA− | Inverting input of Comparator A - accepts rail-to-rail common-mode voltages; biased at picoampere level for minimal source loading. |
| 3 | INA+ | Noninverting input of Comparator A - identical electrical characteristics to INA−; supports differential or single-ended configurations. |
| 4 | VEE | Negative supply terminal - tied to ground in single-supply operation; sets lower reference for dual-supply use. |
| 5 | VCC | Positive supply terminal - powers both comparators and internal bias circuitry; decoupling capacitor required at pin. |
| 6 | INB+ | Noninverting input of Comparator B - electrically isolated from Comparator A; shares same supply and thermal environment. |
| 7 | INB− | Inverting input of Comparator B - matched offset and bias performance to INA+ and INA− for consistent dual-channel behavior. |
| 8 | OUTB | Open-drain output of Comparator B - independently controllable; supports wired-OR logic or shared pullup with OUTA. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Extends 250mV beyond VEE and VCC - eliminates need for input resistive dividers when monitoring signals near supply rails. |
| Open-drain output stage | Supports output pullup to 6V above VEE - enables robust level translation between disparate voltage domains (e.g., 5V MCU to 3.3V FPGA). |
| Internal hysteresis | ±2.5mV fixed - prevents chatter on noisy or slowly varying inputs without external feedback components. |
| Low switching current surge | Minimal supply-current transients during output transitions - reduces need for large local bypass capacitors and eases power integrity design. |
| Ultra-low input bias current | 1.0pA typical - preserves signal integrity in high-impedance sensor front-ends (e.g., pH electrodes, piezoelectric sensors). |
Applications
| Level Translation | Zero-Crossing Detection |
|---|---|
|
Use Scenario: Converting 5V microcontroller GPIO outputs to 3.3V-compatible inputs on an FPGA I/O bank. IC Role / Device Role / Timing Role: Dual open-drain comparator acting as bidirectional logic-level translator with no direction control required. Use Value: Eliminates discrete MOSFET translators; supports hot-swap-safe interface with <1μA standby leakage and sub-120ns response. |
Use Scenario: Detecting AC line zero crossings in an energy-monitoring module powered by a 3.3V LDO. IC Role / Device Role / Timing Role: Comparator A configured with IN+ grounded and IN− driven by scaled AC waveform; OUTA triggers interrupt on crossing. Use Value: Achieves <±100μs timing accuracy over -40°C to +85°C due to low offset drift and rail-to-rail input capability. |
| Threshold Discriminator | Battery Voltage Monitor |
|
Use Scenario: Monitoring photodiode current in a smoke detector to trigger alarm when light intensity drops below threshold. IC Role / Device Role / Timing Role: Comparator B compares transimpedance-amplifier output against stable reference; hysteresis prevents false alarms from noise. Use Value: 1.0pA input bias avoids signal corruption; 48μA total quiescent current enables >5-year battery life in standby mode. |
Use Scenario: Supervising Li-ion cell voltage in a handheld medical device to initiate shutdown at 3.0V under load. IC Role / Device Role / Timing Role: Comparator A compares divided battery voltage against internal 1.25V reference; OUTA drives enable pin of PMIC. Use Value: ±0.5mV offset ensures ±5mV trip-point accuracy; rail-to-rail input accommodates full 2.5–4.2V battery range without scaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 100μA supply current; 300ns propagation delay; no rail-to-rail inputs; no internal hysteresis. | Not suitable for low-power or precision rail-sensing applications; requires external hysteresis resistor network. | Select LM393DR only if cost is primary constraint and timing/power specs are relaxed. |
| TLV3702IDR | 40μA supply current; 110ns propagation delay; rail-to-rail inputs; open-drain outputs; ±1.5mV offset. | Compatible pinout not available; requires PCB redesign; superior offset but lacks Maxim's proven ESD robustness in industrial environments. | Choose TLV3702IDR for ultra-low-power designs where layout flexibility exists and ESD immunity ≥2kV HBM is sufficient. |
Compared with MAX992EKA-T, LM393DR trades precision and speed for cost, while TLV3702IDR improves power and offset but introduces layout risk and reduced ruggedness - making MAX992EKA-T optimal for space-constrained, battery-operated systems demanding reliability and rail-sensing fidelity.
Availability
MAX992EKA-T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and industrial level-translation circuits requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX992EKA-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 industrial, automotive, and communications markets, with emphasis on power efficiency and signal integrity.
The MAX992EKA-T belongs to Maxim's high-speed micropower comparator family, engineered specifically for low-voltage, low-power sensing and interface applications where rail-to-rail operation and clean switching are critical.
FAQ
What is the maximum allowable voltage on the MAX992EKA-T open-drain output?
The MAX992EKA-T open-drain output (OUTA or OUTB) can be pulled up to a maximum of +6V above VEE. When VEE = 0V (single-supply operation), this means the output may be safely connected to a 6V pullup rail. Exceeding this limit risks damage per Absolute Maximum Ratings. This feature enables reliable interfacing with higher-voltage logic families without additional level-shifting components.
Does the MAX992EKA-T require external hysteresis for stable operation?
No - the MAX992EKA-T includes ±2.5mV internal hysteresis, which prevents output oscillation on slow-moving or noisy input signals. This eliminates the need for external positive-feedback resistors in most threshold-detection applications. External hysteresis can be added using the method described in the datasheet Figure 2 if wider hysteresis bands (e.g., >50mV) are required.
Can the MAX992EKA-T operate from a single 3.3V supply?
Yes - the MAX992EKA-T operates over a +2.5V to +5.5V single-supply range, fully covering 3.3V systems. At VCC = 3.3V, it maintains 120ns propagation delay (at 100mV overdrive), 48μA per comparator quiescent current, and rail-to-rail input operation from −0.25V to +3.55V - making it ideal for modern low-voltage embedded designs.
What is the input bias current specification for MAX992EKA-T, and why does it matter?
The MAX992EKA-T features a typical input bias current of 1.0pA, critical for preserving signal integrity in high-impedance sensor interfaces - such as photodiodes, thermopiles, or pH electrodes. Low bias current prevents voltage drop across source impedances >100MΩ, ensuring accurate threshold detection without gain or offset errors introduced by loading effects.
Is the MAX992EKA-T pin-compatible with other devices in the MAX99x family?
No - the MAX992EKA-T uses an 8-pin μMAX® package (U8-1), while the single-channel MAX988 uses a 5-pin SC70. Within the dual-channel group, MAX991EUA-T (push-pull) shares the same μMAX footprint and pinout as MAX992EKA-T, but output behavior differs: MAX991EUA-T sources/sinks current, whereas MAX992EKA-T is open-drain only. PCB layout must match output-stage requirements.
MAX992EKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- CMOS, Open-Drain, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V, ±1.25V ~ 2.75V
- :
- 5mV @ 5.5V
- Voltage - Input Offset (Max):
- 1pA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 96µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 210ns
- Propagation Delay (Max):
- ±2.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-8
MAX992EKA-T FAQ
1.How can I place an order for MAX992EKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX992EKA-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 MAX992EKA-T reliable?
The price and inventory of MAX992EKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX992EKA-T is usually 5 days.
3.What payment methods are accepted for MAX992EKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX992EKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX992EKA-T?
MAX992EKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX992EKA-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 MAX992EKA-T?
For technical support, including MAX992EKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX992EKA-T requirements.
6.How does Aetrix verify that MAX992EKA-T is sourced from the original manufacturer or authorized distributors?
All MAX992EKA-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 MAX992EKA-T meets industry standards.
7.What is the process for return or replacement of MAX992EKA-T?
All MAX992EKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX992EKA-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 MAX992EKA-T part is unused and in its original packaging.
Return procedure for MAX992EKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX992EKA-T Tags
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