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Analog Devices Inc./Maxim Integrated MAX9144ESD+
- Part No.:
- MAX9144ESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9144ESD+.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:542
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Product details
Overview
MAX9144ESD+ from Analog Devices is a quad high-speed rail-to-rail input comparator optimized for 3V/5V single-supply operation, delivering 40ns propagation delay, 150μA per comparator supply current, and 500μV typical offset voltage - used in precision threshold detection and line receiver circuits within battery-powered instrumentation.
For engineers reviewing the MAX9144ESD+ datasheet, MAX9144ESD+ pinout, MAX9144ESD+ application, or MAX9144ESD+ equivalent, key selection criteria include differential propagation delay (≤2ns), rail-to-rail input common-mode range (–0.2V to VCC + 0.2V), output swing within 300mV of rails, and SO-14 package compatibility with industrial temperature-grade (-40°C to +85°C) operation.
Technical Context
The MAX9144ESD+ integrates four independent comparators on a bipolar process, each featuring internal 1.5mV hysteresis to suppress oscillation during slow input transitions and ensure clean switching without external feedback components. Its input stage tolerates continuous short-circuit faults to either rail and supports common-mode voltages beyond supply rails.
Output stages are current-driven, enabling fast slew rates while reducing static power after transition; outputs are CMOS/TTL-compatible with no external pullup required, sinking or sourcing 4mA while maintaining VOL ≤ 0.425V and VOH ≥ VCC – 0.425V across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables sampling of >10MHz signals with deterministic timing margin. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into both 3.3V and 5V logic domains without level shifting. |
| Input Offset Voltage | 0.5mV (typ), 4.5mV (max, –40°C to +85°C) - ensures accurate threshold detection down to sub-millivolt differentials. |
| Input Common-Mode Range | –0.2V to VCC + 0.2V - allows inputs to swing beyond rails, simplifying sensor interface in single-supply systems. |
| Output Swing | Within 300mV of VCC or GND - guarantees reliable interfacing with 3.3V CMOS and 5V TTL loads without external biasing. |
| Quiescent Current | 150μA per comparator at 3V - enables ultra-low-power operation in always-on monitoring circuits. |
| Differential Propagation Delay | ≤2ns (max) - minimizes channel-to-channel timing skew in multi-threshold or window-comparator designs. |
Pinout & Package
MAX9144ESD+ is housed in a 14-pin SO (Small Outline) package, RoHS-compliant, with exposed pad not present, rated for surface-mount assembly and JEDEC-standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain compatible output - actively drives low or floats high; requires external pullup for logic-high assertion. |
| 2 | INA− | Comparator A inverting input - accepts rail-to-rail analog signals; internally protected against ±20mA fault current. |
| 3 | INA+ | Comparator A noninverting input - identical electrical characteristics to INA−; differential pair defines trip point. |
| 4 | VCC | Positive supply pin - powers all four comparators; decoupling capacitor must be placed adjacent to this pin. |
| 5 | INB+ | Comparator B noninverting input - electrically isolated from other channels; supports independent reference setup. |
| 6 | INB− | Comparator B inverting input - matched to INB+ for consistent hysteresis and offset performance. |
| 7 | OUTB | Comparator B output - identical drive capability and timing to OUTA; shares no internal coupling with OUTA. |
| 8 | GND | Analog ground reference - must connect to low-impedance system ground plane to minimize noise coupling. |
| 9 | INC− | Comparator C inverting input - part of third independent comparator; pinout symmetry enables layout reuse. |
| 10 | INC+ | Comparator C noninverting input - supports differential or single-ended configuration with same specs as INA+/INA−. |
| 11 | OUTC | Comparator C output - maintains 40ns tPD and ≤2ns skew relative to other outputs under matched load conditions. |
| 12 | IND+ | Comparator D noninverting input - completes quad configuration; fully specified across full temperature range. |
| 13 | IND− | Comparator D inverting input - matches input bias current (90–320nA) and CMRR (80dB min) of other channels. |
| 14 | OUTD | Comparator D output - delivers same VOL/VOH performance and short-circuit tolerance as OUTA–OUTC. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Accepts signals from –0.2V to VCC + 0.2V - eliminates need for input level-shifting in single-supply sensor front-ends. |
| Internal 1.5mV hysteresis | Prevents chatter on slow-moving or noisy inputs - removes requirement for external positive-feedback resistors. |
| 40ns propagation delay | Supports real-time response in high-speed zero-crossing and pulse-width discrimination applications. |
| 150μA per comparator supply current | Enables four-channel comparison in energy-constrained devices such as portable data loggers and IoT edge nodes. |
| CMOS/TTL-compatible outputs | Drives standard logic families directly - avoids additional buffer ICs and reduces BOM count and board area. |
| Continuous short-circuit tolerance | Withstands indefinite connection of any input or output to VCC or GND - improves field reliability in harsh environments. |
Applications
| Line Receivers | Threshold Detectors |
|---|---|
|
Use Scenario: Receiving differential or single-ended signals over coaxial or twisted-pair lines in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Quad comparator acts as parallel signal conditioner, converting analog line voltages into clean digital logic levels with precise hysteresis. Use Value: 40ns delay and rail-to-rail input enable accurate recovery of fast-edged serial data without external amplification or clamping. |
Use Scenario: Monitoring multiple battery cell voltages in a 4-cell Li-ion pack to trigger charge/discharge cutoffs. IC Role / Device Role / Timing Role: Each comparator independently compares a cell voltage against a reference, generating discrete fault flags. Use Value: 500μV offset and 150μA/channel quiescent current allow millivolt-level accuracy with minimal impact on battery runtime. |
| Zero-Crossing Detectors | Sampling Circuits |
|
Use Scenario: Detecting AC waveform zero crossings in solid-state relays and TRIAC firing control for motor drives. IC Role / Device Role / Timing Role: Comparator A–D configured as synchronized zero-cross detectors with shared hysteresis to reject noise near crossing points. Use Value: Internal 1.5mV hysteresis eliminates false triggering from EMI-induced transients while preserving <1μs timing resolution. |
Use Scenario: Capturing analog waveform edges in oscilloscope front-ends or time-of-flight measurement systems. IC Role / Device Role / Timing Role: Four comparators implement simultaneous multi-level sampling (e.g., 4-bit flash ADC architecture). Use Value: ≤2ns inter-channel skew ensures coherent sampling across thresholds, critical for reconstructing fast transient waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Slower (1.3μs propagation delay), higher supply current (500μA/comparator), no rail-to-rail inputs, no internal hysteresis. | Suitable only for low-speed DC thresholding; cannot replace MAX9144ESD+ in 40ns-critical or rail-to-rail input applications. | Select LM339DR only when cost is primary constraint and speed/hysteresis/rail-to-rail operation are unnecessary. |
| TLV3704IPW | Lower supply current (80μA/comparator), rail-to-rail inputs, but slower (120ns delay) and no guaranteed 40ns performance across temperature. | Acceptable for low-power battery monitoring where timing margin >100ns is available; lacks MAX9144ESD+'s skew control. | Choose TLV3704IPW if power budget is tighter than timing budget, and inter-channel skew is not design-critical. |
Compared with LM339DR and TLV3704IPW, the MAX9144ESD+ uniquely delivers 40ns speed, rail-to-rail input operation, and built-in hysteresis in a quad SO-14 package - making it irreplaceable in high-fidelity line receivers and multi-threshold sampling systems requiring deterministic nanosecond-scale timing.
Availability
MAX9144ESD+ is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and test equipment requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C performance.
Supply support for MAX9144ESD+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX9144ESD+ belongs to the MAX914x family of high-speed comparators designed specifically for precision, low-power, single-supply sensing and signal conditioning in portable and space-constrained systems.
FAQ
What is the operating temperature range for MAX9144ESD+?
The MAX9144ESD+ is rated for the E-grade industrial temperature range of –40°C to +85°C. This specification is guaranteed across all electrical parameters including propagation delay, offset voltage, and supply current. The device uses a bipolar process and is assembled in a 14-pin SO package qualified for extended thermal cycling in embedded control and instrumentation applications. MAX9144ESD+ does not support automotive AEC-Q100 qualification - that applies only to select MAX9140 variants.
Does MAX9144ESD+ include shutdown or latch functionality?
No, the MAX9144ESD+ does not include shutdown or latch functionality. Those features are exclusive to the MAX9141 variant (single comparator with SHDN and LE pins). The MAX9144ESD+ is a quad comparator with fixed active operation - all four channels remain enabled whenever VCC is applied. Its pinout contains no SHDN or LE terminals, and its internal architecture lacks control logic for power gating or output latching. Use MAX9141ESA+ if latch or shutdown capability is required.
Can MAX9144ESD+ drive TTL logic directly?
Yes, MAX9144ESD+ outputs are TTL-compatible: they sink up to 4mA while holding VOL ≤ 0.425V and source sufficient current to maintain VOH ≥ VCC – 0.425V, meeting TTL input high/low voltage thresholds across the full –40°C to +85°C range. No external pullup resistors are needed for TTL interfacing, though a 1kΩ series resistor is recommended for ESD protection on long traces. The output stage is current-driven and robust against capacitive loading up to 50pF without instability.
What is the maximum input differential voltage the MAX9144ESD+ can tolerate?
The MAX9144ESD+ input pins tolerate a continuous differential voltage of up to ±2 × VF (≈ ±1.4V at +25°C) due to internal back-to-back diode clamping between IN+ and IN–. Beyond that, current flows through 4.1kΩ series resistors, limiting fault current to safe levels. Absolute maximum ratings specify ±20mA continuous input current - meaning sustained differential voltages exceeding ~82V would be required to breach this limit. For normal operation, differential inputs should stay within ±100mV to avoid increased input bias current and maintain specified offset accuracy.
Is MAX9144ESD+ pin-compatible with other packages in the MAX914x family?
No, MAX9144ESD+ is not pin-compatible with other MAX914x variants. It uses a 14-pin SO package with dedicated pins for four independent comparators (OUTA–OUTD, INA±–IND±, VCC, GND). In contrast, MAX9140 (5-pin) and MAX9141/MAX9142 (8-pin) use smaller footprints with fewer channels and different pin assignments. The 14-pin TSSOP variant MAX9144EUD+ shares identical pinout and function but differs mechanically - SO and TSSOP are not interchangeable without PCB redesign.
MAX9144ESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 2mV @ 5V
- Voltage - Input Offset (Max):
- 0.32µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 300µA
- Current - Quiescent (Max):
- 81.94dB CMRR, 81.94dB PSRR
- CMRR, PSRR (Typ):
- 40ns
- Propagation Delay (Max):
- 1.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
MAX9144ESD+ FAQ
1.How can I place an order for MAX9144ESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9144ESD+ 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 MAX9144ESD+ reliable?
The price and inventory of MAX9144ESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9144ESD+ is usually 5 days.
3.What payment methods are accepted for MAX9144ESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9144ESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9144ESD+?
MAX9144ESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9144ESD+ 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 MAX9144ESD+?
For technical support, including MAX9144ESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9144ESD+ requirements.
6.How does Aetrix verify that MAX9144ESD+ is sourced from the original manufacturer or authorized distributors?
All MAX9144ESD+ 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 MAX9144ESD+ meets industry standards.
7.What is the process for return or replacement of MAX9144ESD+?
All MAX9144ESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9144ESD+, 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 MAX9144ESD+ part is unused and in its original packaging.
Return procedure for MAX9144ESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9144ESD+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP USA Inc.
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