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Analog Devices Inc./Maxim Integrated MAX14002AAP+
- Part No.:
- MAX14002AAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX14002AAP+.pdf
- Description:
- IC ADC 10BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:207
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Product details
Overview
The MAX14002AAP+ from Maxim Integrated is a configurable, isolated 10-bit analog-to-digital converter with integrated binary threshold comparators, programmable input bias current (50µA–3.75mA), fixed inrush current (49mA/48ms), and 3.75kVRMS galvanic isolation-designed for high-voltage binary input modules in industrial automation systems operating from 12V to 300V.
For engineers reviewing the MAX14002AAP+ datasheet, MAX14002AAP+ pinout, MAX14002AAP+ application, or MAX14002AAP+ equivalent, this device delivers verified field-side diagnostics, SPI-accessible filtered/unfiltered ADC data (10ksps), <150µs comparator response (no filtering), and robust noise rejection via programmable bias and wetting pulse control-critical for substation and distribution automation input conditioning.
Technical Context
The MAX14002AAP+ implements a SAR-based 10-bit ADC continuously sampling AIN (0–1.25V vs AGND) with dual output paths: unfiltered raw data and moving-average filtered data (2/4/8-sample window). Its comparator logic evaluates each ADC result against independently programmable upper (THU) and lower (THL) thresholds to drive COUT with <150µs latency when filtering is disabled.
Isolation is achieved via an integrated 3.75kVRMS reinforced barrier separating logic-side (VDDL/GNDL) and field-side (VDDF/GNDF) domains, including isolated DC-DC power conversion. The device drives an external depletion-mode FET through GATE and IFET pins to deliver fixed inrush current (49mA, 48ms) and programmable bias current-enabling contact cleaning and capacitive noise attenuation without external controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 10-bit SAR architecture delivering discrete digital representation of analog input voltage for precise binary decision-making. |
| Sampling Rate | 10ksps nominal throughput-supports real-time monitoring of fast-rising binary inputs like relay closures. |
| Isolation Voltage | 3.75kVRMS withstand rating (60s, 60Hz)-certified to UL1577 for safe operation in 600V-class industrial environments. |
| Comparator Latency | <150µs response time (no filtering)-enables rapid detection of input transitions critical for fault logging and event timing. |
| Bias Current Range | Programmable 50µA to 3.75mA in 0.25mA steps-allows tradeoff between noise immunity and power dissipation per channel. |
| Inrush Current | Fixed 49mA for 48ms (MAX14002 only)-cleans relay contacts during closure without requiring configuration registers. |
| SPI Interface Speed | 5MHz clock rate-enables fast register read/write for dynamic threshold updates and diagnostics in multi-channel systems. |
| Creepage/Clearance | 5.5mm minimum-meets IEC 61000-4-5 surge immunity requirements in compact 20-SSOP layout. |
Pinout & Package
The MAX14002AAP+ is housed in a 20-pin SSOP package (7.9mm × 7.33mm) with Group II CTI-rated molding compound, providing 5.5mm creepage and clearance for reinforced isolation in high-pollution environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDL | Logic-side power supply | Accepts 1.71V–5.5V to power SPI interface, comparator logic, and register bank-bypassed to GNDL with 10µF||1000pF. |
| GNDL | Logic ground reference | Common return for all digital I/O (CS, SCLK, SDO, SDI, FAULT, COUT) and VDDL decoupling. |
| CS / SCLK / SDI / SDO | SPI interface signals | Standard 4-wire SPI bus (MOSI/MISO) enabling configuration, ADC readout, and fault register access at up to 5MHz. |
| COUT | Digital comparator output | Open-drain logic-level output high when AIN > THU, low when AIN < THL-directly interfaces PLC input cards or microcontroller GPIO. |
| FAULT | Diagnostic error flag | Asserts low on internal fault conditions (e.g., UVLO, reference error); latched status readable via SPI FLAGS register. |
| VDD | Isolated DC-DC input | 3.0V–3.6V supply powering the field-side isolation barrier and internal DC-DC converter-bypassed to GNDL. |
| VDDF | Field-side DC-DC output | Unregulated ~3.0V output powering field-side ADC, reference, and gate driver-bypassed to GNDF with 0.1µF||1000pF. |
| GATE | FET gate drive node | Provides buffered gate voltage (~3.6V) to external depletion-mode FET-requires 0.01µF capacitor to GNDF for stability. |
| IFET | FET source current sink | Current return path for inrush/bias current-buffered from high voltage via external FET source connection. |
| ISET | Bias/inrush current reference | Connects to GNDF via 120kΩ resistor to set full-scale DAC currents-parasitic capacitance must be ≤10pF. |
| AIN | Analog input terminal | High-impedance input measuring voltage referenced to AGND (0–1.25V range); accepts scaled high-voltage inputs via external divider. |
| AGND / GNDF | Analog and field grounds | Separate ground domains: AGND for AIN/REFIN precision, GNDF for field-side power and IFET return-must be isolated. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.75kVRMS isolation barrier | Eliminates need for external isolators or optocouplers-reduces BOM count and board area in multi-channel DI modules. |
| Programmable input bias current (50µA–3.75mA) | Optimizes noise rejection vs. power consumption across varying line impedances and EMI environments. |
| Fixed 49mA/48ms inrush current | Automatically cleans relay contacts during closure-extends mechanical life without firmware intervention or external timers. |
| Field-side diagnostics capability | Enables verification of field-side functionality (ADC, reference, FET drive) even with zero input signal-simplifies commissioning and maintenance. |
| Daisy-chainable SPI interface | Supports cascaded configuration of multiple MAX14002AAP+ devices on single SPI bus-reduces MCU GPIO and routing complexity. |
Applications
| Distribution Automation | Substation Automation |
|---|---|
Use Scenario: Monitoring overhead line voltage presence and breaker status in medium-voltage feeder circuits. IC Role / Device Role / Timing Role: Isolated ADC digitizes scaled 12–300V inputs; comparator generates clean digital status flags for SCADA telemetry. Use Value: 3.75kVRMS isolation and 5.5mm creepage ensure reliable operation in outdoor switchgear exposed to lightning-induced transients. |
Use Scenario: Digitizing auxiliary contact states and protection relay outputs in 138kV substation bay controllers. IC Role / Device Role / Timing Role: Provides individually isolated, noise-immune binary inputs with programmable bias current to reject capacitive coupling from adjacent high-current busbars. Use Value: Fixed 49mA inrush pulse maintains contact integrity over decades of operation-reducing unplanned outages and manual inspection cycles. |
| Industrial Control DI Modules | Multi-Range Digital Input Systems |
Use Scenario: High-density programmable logic controller (PLC) input cards accepting mixed 24V/48V/120V/240V field signals. IC Role / Device Role / Timing Role: Each MAX14002AAP+ handles one isolated channel with independent threshold programming via SPI-enabling per-channel voltage range configuration. Use Value: 10ksps sampling and <150µs comparator latency support fast edge detection for motion control safety interlocks and emergency stop validation. |
Use Scenario: Modular I/O systems where users select input ranges via software rather than hardware jumpers or resistor networks. IC Role / Device Role / Timing Role: ADC provides calibrated voltage measurement; SPI-configurable THU/THL thresholds allow runtime adaptation to different sensor types or field wiring configurations. Use Value: Eliminates need for external scaling resistors or trim pots-reducing calibration labor and improving long-term accuracy stability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated binary input conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14001AAP+ | Programmable inrush current (50µA–105mA, 0–120ms) and voltage-triggered inrush mode; identical ADC, isolation, and bias features. | Required where adaptive wetting pulses are needed for diverse relay types or variable contact resistance. | Select MAX14001AAP+ when inrush parameters must be tuned per installation; MAX14002AAP+ is preferred for fixed-configuration deployments. |
| ADUM7440ARQZ | No integrated ADC or comparator; provides only 4-channel 3.75kVRMS digital isolation with 1Mbps data rate and no field-side power. | Used with external ADC/microcontroller for custom binary processing-lacks built-in diagnostics and inrush control. | Choose ADUM7440ARQZ only when full system-level flexibility is required and field-side power must be supplied externally. |
Compared with MAX14001AAP+, the MAX14002AAP+ trades inrush configurability for simplified design-in and guaranteed timing behavior; versus ADUM7440ARQZ, it integrates ADC, comparator, and field-side power-reducing component count by ≥4 per channel while enabling autonomous field-side diagnostics.
Availability
The MAX14002AAP+ is available at Aetrix Electronics and suitable for distribution automation, substation automation, and industrial control applications requiring stable component supply, long-term lifecycle support, and certified isolation performance.
Supply support for MAX14002AAP+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets-with emphasis on integration, reliability, and system-level simplification.
The MAX14002AAP+ belongs to Maxim's isolated binary input ADC family, engineered specifically for high-density, multi-range digital input modules in utility and factory automation-where galvanic isolation, contact conditioning, and field-side diagnostics are mandatory.
FAQ
What is the maximum input voltage the MAX14002AAP+ can safely measure?
The MAX14002AAP+ analog input (AIN) accepts 0V to +1.25V referenced to AGND. To measure higher voltages (e.g., 12V–300V), an external resistor divider must scale the signal into this range. The device itself does not tolerate direct high-voltage application on AIN-the isolation barrier protects logic-side circuitry, but field-side front-end components require proper external scaling and protection per application voltage class.
Does the MAX14002AAP+ support daisy-chained SPI communication?
Yes, the MAX14002AAP+ supports daisy-chained SPI operation. Its SDO pin can be connected to the SDI pin of the next device in the chain, allowing multiple MAX14002AAP+ units to share a single CS/SCLK line while maintaining independent register access and ADC readout-reducing MCU pin count and PCB routing complexity in multi-channel systems.
How does the MAX14002AAP+ handle field-side power when no input signal is present?
The MAX14002AAP+ uses an integrated isolated DC-DC converter powered by VDD (logic-side supply) to generate VDDF for the field side. This allows full field-side functionality-including ADC operation, reference stability, and diagnostic self-tests-even with zero input voltage on AIN. Field-side power is independent of the input signal, enabling pre-commissioning verification and fault isolation.
What is the difference between MAX14002AAP+ and MAX14001AAP+ regarding inrush current control?
The MAX14002AAP+ provides fixed inrush current: 49mA for 48ms, with FAST-mode triggering only. In contrast, the MAX14001AAP+ offers fully programmable inrush magnitude (50µA–105mA) and duration (0–120ms), plus voltage-triggered or FAST-triggered modes. Both share identical bias current programming (50µA–3.75mA) and core ADC/comparator functionality.
Can the MAX14002AAP+ operate with an external voltage reference?
Yes, the MAX14002AAP+ supports both internal (1.25V ±5%) and external voltage references. An external reference may be connected to REFIN in series (powered from VDDF) or shunt (powered by internal 70µA current source) configuration. Selection is made via the CFG register's EXRF and EXTI bits-enabling improved ADC accuracy when tighter reference tolerance is required for precision thresholding.
MAX14002AAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 10k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 1.71V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX14002AAP+ FAQ
1.How can I place an order for MAX14002AAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14002AAP+ 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 MAX14002AAP+ reliable?
The price and inventory of MAX14002AAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14002AAP+ is usually 5 days.
3.What payment methods are accepted for MAX14002AAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14002AAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14002AAP+?
MAX14002AAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14002AAP+ 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 MAX14002AAP+?
For technical support, including MAX14002AAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14002AAP+ requirements.
6.How does Aetrix verify that MAX14002AAP+ is sourced from the original manufacturer or authorized distributors?
All MAX14002AAP+ 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 MAX14002AAP+ meets industry standards.
7.What is the process for return or replacement of MAX14002AAP+?
All MAX14002AAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14002AAP+, 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 MAX14002AAP+ part is unused and in its original packaging.
Return procedure for MAX14002AAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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