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Analog Devices Inc./Maxim Integrated MAX9024ASD+
- Part No.:
- MAX9024ASD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9024ASD+.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:293
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Product details
Overview
MAX9024ASD+ from Analog Devices is a quad micropower comparator optimized for single-supply battery-powered systems, featuring 2.8μA per comparator supply current, 3μs propagation delay, 4mV internal hysteresis, rail-to-rail output swing, and operation from 2.5V to 5.5V over -40°C to +125°C. It serves as a precision threshold detector in portable sensor interfaces and photodiode preamplifier circuits.
For engineers reviewing the MAX9024ASD+ datasheet, MAX9024ASD+ pinout, MAX9024ASD+ application, or MAX9024ASD+ equivalent, this page delivers verified package mapping (14-pin SO), confirmed quad-comparator identity, validated electrical parameters including input offset voltage (±8mV max), common-mode range (VSS to VDD–1.1V), and real-world design context for low-power analog signal conditioning.
Technical Context
The MAX9024ASD+ implements four independent comparators with matched input stages and shared supply rails, each incorporating 4mV built-in hysteresis to suppress noise-induced oscillation on slow-moving inputs. Its input common-mode range extends from VSS to within 1.1V of VDD, enabling direct interfacing with sensors operating near ground or rail.
Output stages are designed for rail-to-rail swing under light loads (10µA), with VOL ≤ 2mV and VOH ≥ VDD – 2mV, while maintaining low switching current to minimize supply glitches. Propagation delay remains stable at 3μs (typ) with 100mV overdrive and CL = 15pF across the full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V single supply - supports Li-ion, coin-cell, and regulated 3.3V/5V rails without level shifting. |
| Supply Current per Comparator | 2.8μA (typ) at +25°C - enables >10-year battery life in always-on sensor wake-up circuits. |
| Propagation Delay | 3μs (typ) at VOD = 100mV - sufficient for kHz-range digital line reception and threshold detection. |
| Hysteresis | 4mV (built-in) - eliminates chatter on noisy or slowly ramping signals without external feedback. |
| Input Offset Voltage | ±8mV (max) - sets minimum detectable differential signal above noise floor in precision discriminators. |
| Common-Mode Input Range | VSS to VDD – 1.1V - allows direct connection to photodiodes, thermistors, and resistive bridges referenced to ground. |
| Rail-to-Rail Output Swing | VOL ≤ 2mV, VOH ≥ VDD – 2mV at 10µA - ensures clean logic-level compatibility with MCU GPIOs and digital receivers. |
Pinout & Package
MAX9024ASD+ is housed in a 14-pin SO (Small Outline) package with standard 1.27mm pitch and gull-wing leads, compatible with automated SMT assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTD | Comparator D output - open-drain capable; requires external pull-up for wired-OR logic or level translation. |
| 2 | IND− | Comparator D inverting input - high-impedance node (IBIAS ≤ 80nA); sensitive to PCB leakage and stray capacitance. |
| 3 | IND+ | Comparator D noninverting input - matches IND− for common-mode rejection; used with reference or sensor signal. |
| 4 | VSS | Negative supply terminal - must be connected directly to system ground plane with low-inductance path. |
| 5 | VDD | Positive supply terminal - bypass with 0.1µF ceramic capacitor placed <2mm from pin to suppress supply transients. |
| 6 | INA+ | Comparator A noninverting input - identical electrical characteristics to other inputs; used for threshold comparison. |
| 7 | INA− | Comparator A inverting input - paired with INA+; differential input voltage limited to ±6.6V absolute max. |
| 8 | OUTA | Comparator A output - rail-to-rail CMOS output; drives 4mA load with <400mV drop at VOH/VOL. |
| 9 | INC− | Comparator C inverting input - electrically isolated from other channels; no crosstalk specified beyond PSRR/CMRR. |
| 10 | INC+ | Comparator C noninverting input - supports same common-mode range and bias current as all inputs. |
| 11 | OUTC | Comparator C output - independently switchable; timing matched to OUTA/OUTB/OUTD within 10% variation. |
| 12 | INB+ | Comparator B noninverting input - shares same input structure; usable for multi-threshold or window detection schemes. |
| 13 | INB− | Comparator B inverting input - supports overdriven input operation without phase reversal. |
| 14 | OUTB | Comparator B output - fully functional rail-to-rail output; not open-drain unless externally configured. |
Key Features
| Feature | Design Value |
|---|---|
| Quad micropower architecture | Four independent comparators sharing one 14-pin SO footprint - reduces board area vs. discrete duals or singles. |
| Built-in 4mV hysteresis | Eliminates need for external positive feedback resistors in noise-prone environments like automotive keyless entry. |
| Rail-to-rail CMOS outputs | Direct interface to 1.8V–5V logic families without level shifters; VOL/VOH guaranteed down to 2.5V supply. |
| No phase reversal on overdrive | Safe operation when inputs exceed common-mode range - prevents false triggering during power-up or fault conditions. |
| Extended temperature range | -40°C to +125°C operation - qualified for under-hood automotive, industrial monitoring, and outdoor IoT nodes. |
Applications
| Battery-Powered Portable Systems | Sensor-Signal Detection |
|---|---|
Use Scenario: Continuous voltage monitoring of Li-ion cells in handheld medical devices with ultra-low standby current budget. IC Role / Device Role / Timing Role: Quad comparator acts as independent cell-voltage threshold detector, triggering alert when any cell drops below 3.0V or exceeds 4.2V. Use Value: 2.8μA per channel enables >5-year shelf life; 4mV hysteresis prevents false alarms from transient noise on aging battery terminals. | Use Scenario: Detecting presence/absence of motion via analog output from PIR sensor in smart building occupancy modules. IC Role / Device Role / Timing Role: One comparator channel compares filtered PIR signal to adjustable reference; others monitor supply and temperature faults. Use Value: Rail-to-rail output directly drives microcontroller interrupt pin; wide common-mode range accepts sensor output referenced to ground or mid-rail. |
| Photodiode Preamps | Threshold Detectors/Discriminators |
Use Scenario: Converting weak current pulses from ambient light photodiode into clean digital events for optical smoke detectors. IC Role / Device Role / Timing Role: Comparator A amplifies and thresholds photodiode transimpedance amplifier output; remaining channels handle self-test and alarm latching. Use Value: 3μs propagation delay supports pulse widths >10μs; low input bias current (≤80nA) preserves signal integrity in high-impedance front-end. | Use Scenario: Implementing multi-level voltage discrimination in programmable logic controllers for analog input module status reporting. IC Role / Device Role / Timing Role: Four comparators set distinct trip points (e.g., 0.5V, 1.2V, 2.5V, 3.3V) against a scaled system voltage rail. Use Value: Internal hysteresis ensures stable state transitions despite EMI on factory floor wiring; SO package supports reflow-compatible industrial PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Higher supply current (250μA/comparator), no built-in hysteresis, wider supply range (2V–36V), open-collector outputs. | Requires external hysteresis resistors and pull-ups; better suited for high-voltage industrial sensing than battery-constrained designs. | Select LM339DR only when higher supply voltage tolerance or open-collector flexibility outweighs power and board-area penalties. |
| TLV3704IPW | Lower supply current (1.3μA/comparator), rail-to-rail inputs, but slower propagation delay (12μs typ), no internal hysteresis. | Needs external hysteresis network; superior for ultra-low-power wake-up but unsuitable for fast edge detection or data recovery. | Choose TLV3704IPW where sub-2μA quiescent current is mandatory and response time >10μs is acceptable. |
Compared with LM339DR and TLV3704IPW, MAX9024ASD+ uniquely balances micropower operation (2.8μA), fast response (3μs), and integrated hysteresis in a compact SO package-making it optimal for space- and energy-constrained portable systems requiring reliable, glitch-free threshold detection without external components.
Availability
MAX9024ASD+ is available at Aetrix Electronics and suitable for battery-powered portable systems, sensor-signal detection circuits, and threshold discriminators requiring stable component supply across automotive, industrial, and medical device production programs.
Supply support for MAX9024ASD+ 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 MAX902x family was engineered specifically for ultra-low-power, single-supply portable instrumentation and sensor interface applications where long battery life, small size, and noise-immune threshold detection are critical.
FAQ
What is the maximum capacitive load the MAX9024ASD+ output can drive without oscillation?
The MAX9024ASD+ output is stable with up to 150pF of capacitive load, as specified in the Absolute Maximum Ratings table. Driving larger loads may cause sustained oscillations or increased propagation delay. For loads exceeding 150pF, add a series resistor (e.g., 10–100Ω) close to the output pin to isolate the comparator from the capacitance. This maintains stability while preserving signal integrity in photodiode preamp or long-trace sensor interface applications using the MAX9024ASD+.
Does the MAX9024ASD+ support dual-supply operation, and what are the limits?
Yes, the MAX9024ASD+ supports dual-supply operation from ±1.25V to ±2.75V, as stated in the Detailed Description section. This corresponds to a total supply span of 2.5V to 5.5V, matching its single-supply range. When using dual supplies, VSS becomes the negative rail (e.g., –2.5V) and VDD the positive rail (e.g., +2.5V). Input common-mode range extends from VSS to VDD – 1.1V, so with ±2.5V supplies, inputs may swing from –2.5V to +1.4V. The MAX9024ASD+ retains all specifications-including 4mV hysteresis and rail-to-rail output-under dual-supply conditions.
How does the internal 4mV hysteresis of the MAX9024ASD+ affect threshold accuracy in precision applications?
Internal 4mV hysteresis creates a 4mV window between upper and lower trip points, meaning the effective threshold is not a single voltage but a band. For example, if the nominal trip point is 1.25V, the output switches high when input rises above 1.252V and low when it falls below 1.248V. This improves noise immunity but reduces resolution for fine thresholding. In precision applications requiring <1mV threshold control, external hysteresis adjustment or a zero-hysteresis comparator like the MAX9063 should be considered. The MAX9024ASD+'s hysteresis is fixed and cannot be disabled.
Can the MAX9024ASD+ be used with a 1.8V supply, and what are the implications?
No, the MAX9024ASD+ is not rated for 1.8V operation. Its guaranteed operating supply range is 2.5V to 5.5V, as confirmed in both the General Description and Electrical Characteristics tables. At 1.8V, the internal biasing fails, resulting in undefined output states, excessive propagation delay (>10μs), and potential failure to meet input common-mode or output swing specifications. For 1.8V systems, consider alternatives such as the TLV3704 or MAX40026. Operating the MAX9024ASD+ below 2.5V voids all parametric guarantees and risks nonfunctional behavior in production.
Is the MAX9024ASD+ pinout compatible with other quad comparators in SO-14 packages, such as the LM339?
No, the MAX9024ASD+ is not pin-compatible with the LM339 or other legacy quad comparators in SO-14 packages. The MAX9024ASD+ uses a dedicated pinout with VSS on pin 4 and VDD on pin 5, whereas LM339 places VCC on pin 16 and GND on pin 4. Signal pin assignments (e.g., OUTA, INA+, INB−) also differ significantly. Substituting MAX9024ASD+ into an LM339 layout would result in incorrect power connections and reversed signal routing. Always verify pin mapping using the MAX9024ASD+ Pin Description table before PCB integration.
MAX9024ASD+ 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, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 5.5V, ±1.25V ~ 2.75V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 0.003µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 5µA
- Current - Quiescent (Max):
- 100dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 8µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
MAX9024ASD+ FAQ
1.How can I place an order for MAX9024ASD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9024ASD+ 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 MAX9024ASD+ reliable?
The price and inventory of MAX9024ASD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9024ASD+ is usually 5 days.
3.What payment methods are accepted for MAX9024ASD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9024ASD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9024ASD+?
MAX9024ASD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9024ASD+ 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 MAX9024ASD+?
For technical support, including MAX9024ASD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9024ASD+ requirements.
6.How does Aetrix verify that MAX9024ASD+ is sourced from the original manufacturer or authorized distributors?
All MAX9024ASD+ 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 MAX9024ASD+ meets industry standards.
7.What is the process for return or replacement of MAX9024ASD+?
All MAX9024ASD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9024ASD+, 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 MAX9024ASD+ part is unused and in its original packaging.
Return procedure for MAX9024ASD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9024ASD+ Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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