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Analog Devices Inc./Maxim Integrated MAX14001AAP+
- Part No.:
- MAX14001AAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX14001AAP+.pdf
- Description:
- IC ADC 10BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:202
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Product details
Overview
The MAX14001AAP+ from Maxim Integrated is a configurable, isolated 10-bit analog-to-digital converter with integrated programmable voltage comparators, inrush current control, and isolated DC-DC power for binary input conditioning. It delivers 3.75kVRMS isolation, 10ksps ADC throughput, <150µs comparator response (unfiltered), and supports 12V–300V high-voltage binary inputs in industrial digital input modules.
For engineers reviewing the MAX14001AAP+ datasheet, MAX14001AAP+ pinout, MAX14001AAP+ application, or MAX14001AAP+ equivalent, this device serves as a single-chip solution for isolated multi-range binary sensing-enabling field-side diagnostics, programmable wetting pulses, noise-rejecting bias current, and SPI-configurable thresholds without external isolators or power supplies.
Technical Context
The MAX14001AAP+ integrates a SAR-based 10-bit ADC, dual-threshold magnitude comparator, isolated DC-DC converter (VDDF output), and two current DACs-one for programmable bias current (50µA–3.75mA) and one for programmable inrush current (50µA–105mA, 0–120ms). All field-side circuitry operates autonomously using the internal isolated supply, enabling diagnostics even with no input signal.
It implements a daisy-chainable 5MHz SPI interface for register configuration, real-time ADC data readout (filtered/unfiltered), and fault reporting via open-drain FAULT pin. The comparator output (COUT) responds to AIN voltage relative to THU/THL thresholds, with latency dependent on filter depth (2/4/8-sample moving average) and mode (voltage-triggered or FAST).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75kVRMS for 60s (UL1577 certified); enables safe interfacing to 300V field-side inputs. |
| ADC Resolution & Speed | 10-bit SAR; 10ksps nominal throughput; provides sufficient resolution for ±0.5% full-scale binary threshold detection. |
| Comparator Latency | <150µs (unfiltered); ensures rapid binary state detection critical for contact bounce mitigation in relay monitoring. |
| Bias Current Range | Programmable 50µA–3.75mA (0.25mA steps); balances capacitive noise rejection against power dissipation in high-impedance inputs. |
| Inrush Current Control | Programmable magnitude (7mA steps) and duration (8ms steps); cleans relay contacts during closure without external timing circuitry. |
| SPI Interface | 5MHz max clock; daisy-chainable; supports real-time register access, fault flag reading, and dual ADC data streams (filtered/unfiltered). |
| Package | 20-pin SSOP; 5.5mm creepage/clearance; Group II CTI material; meets IEC 60112 tracking requirements for industrial environments. |
Pinout & Package
MAX14001AAP+ uses a 20-pin SSOP package (7.9mm × 7.33mm) with 5.5mm minimum creepage and clearance, rated for Group II CTI (Comparative Tracking Index >400), suitable for pollution degree 2 and climatic category 40/125/21.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDL | Logic-side power supply | 1.71V–5.5V input powering SPI interface, registers, and comparator logic; requires local 10µF||1000pF bypass to GNDL. |
| VDD | Isolated DC-DC primary supply | 3.0V–3.6V input powering the internal isolated DC-DC converter; enables field-side operation independent of input signal presence. |
| GNDL / GNDF | Logic- and field-side grounds | Galvanically separated ground domains; mandatory physical separation prevents isolation barrier compromise. |
| AIN / AGND | Analog input reference pair | AIN measures 0–1.25V differential to AGND; supports resistor-divider scaling for 12V–300V input range. |
| ISET | Bias/inrush current reference | Connect 120kΩ resistor to GNDF to set precision current reference; parasitic capacitance must be <10pF for accuracy. |
| GATE / IFET | High-voltage FET gate drive & current sink | GATE supplies gate bias to external depletion-mode FET; IFET sinks programmable inrush/bias current from FET source. |
| COUT | Digital comparator output | Open-drain logic-level output indicating AIN status vs. THU/THL thresholds; directly interfaces to microcontroller GPIO. |
| CS / SCLK / SDI / SDO | SPI interface signals | Standard 4-wire SPI (MOSI/MISO) with chip select; supports daisy-chaining multiple devices on shared bus. |
| FAULT | Diagnostic fault indicator | Open-drain active-low output latching conditions like UVLO, ADC error, or isolation fault; cleared via SPI register write. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Isolated DC-DC Converter | Provides regulated VDDF output to power field-side ADC, comparators, and DACs-enabling diagnostics with zero input voltage. |
| Programmable Inrush Pulse Generator | Configurable magnitude (50µA–105mA) and duration (0–120ms) eliminates need for external pulse generators in relay contact cleaning. |
| Dual-Mode Input Bias Control | Adjustable 50µA–3.75mA bias current reduces capacitive noise coupling while minimizing power loss in high-impedance binary inputs. |
| Filter-Selectable ADC Output | Simultaneous access to unfiltered (low-latency) and filtered (noise-reduced) 10-bit readings via SPI-supports both fast response and stable decision logic. |
| Field-Side Self-Diagnostics | Automatic verification of ADC functionality, reference stability, and isolation integrity without host intervention-reducing system maintenance overhead. |
Applications
| Distribution Automation | Substation Automation |
|---|---|
|
Use Scenario: Monitoring AC line voltage presence across multiple feeders in medium-voltage switchgear. IC Role / Device Role / Timing Role: Isolated binary input conditioner converting 120V–300V AC-derived DC signals into clean, noise-immune logic-level outputs for PLC or RTU input cards. Use Value: Eliminates external optocouplers and isolated power supplies while providing programmable wetting pulses to prevent contact oxidation in electromechanical relays. |
Use Scenario: Detecting breaker status and auxiliary contact closures in GIS (Gas-Insulated Switchgear) control panels. IC Role / Device Role / Timing Role: High-voltage binary sensor with field-side diagnostics, enabling predictive maintenance by verifying input path integrity before fault events occur. Use Value: Reduces false alarms from EMI-induced transients through programmable filtering and bias current optimization for long cable runs. |
| Industrial Digital Input Modules | Multi-Range Binary Sensing Systems |
|
Use Scenario: Compact DIN-rail mounted I/O modules requiring individually isolated 24V/48V/120V/240V inputs per channel. IC Role / Device Role / Timing Role: Channel-level isolated ADC + comparator + FET driver, supporting mixed-voltage inputs without external level-shifting or isolation components. Use Value: Cuts BOM count by 40% versus discrete isolation solutions and enables per-channel programmability for flexible factory-floor deployment. |
Use Scenario: Retrofitting legacy machinery with modern binary input capability across varying supply voltages (e.g., 12V sensors to 230V AC lines). IC Role / Device Role / Timing Role: Configurable front-end that scales input range via external resistor dividers while maintaining consistent 10-bit resolution and threshold accuracy. Use Value: Enables single hardware design to support global voltage standards-reducing inventory SKUs and qualification effort. |
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 |
|---|---|---|---|
| MAX14002AAP+ | Fixed inrush current (49mA/48ms); no voltage-triggered mode; identical pinout, ADC, comparator, and bias current features. | Best suited for cost-sensitive designs where programmable inrush is unnecessary and FAST-mode-only operation is acceptable. | Select MAX14002AAP+ when simplified configuration and lower unit cost outweigh need for inrush customization. |
| ADI AD7403BRIZ-RL | 2nd-order sigma-delta modulator + digital filter; no integrated DC-DC, no inrush/bias DACs; requires external isolated power and comparator logic. | Requires additional components for full binary input functionality; used where ultra-high noise immunity (>20-bit effective resolution) is prioritized over integration. | Choose AD7403BRIZ-RL only when system already includes isolated power and needs higher-resolution modulation-not as a drop-in replacement. |
Compared with MAX14002AAP+, the MAX14001AAP+ adds full inrush configurability and voltage-triggered activation, enabling adaptive contact cleaning; compared with AD7403BRIZ-RL, it delivers complete signal chain integration-including isolated power, conditioning, and actuation-reducing board area and validation scope.
Availability
MAX14001AAP+ is available at Aetrix Electronics and suitable for distribution automation, substation monitoring, and industrial digital input modules requiring stable component supply, long-term lifecycle support, and UL-certified isolation performance.
Supply support for MAX14001AAP+ 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 systems-with emphasis on integration, reliability, and safety compliance.
The MAX14001AAP+ belongs to Maxim's isolated binary input ADC family, engineered specifically for high-density, multi-range digital input modules needing galvanic isolation, self-diagnostics, and programmable contact conditioning in harsh electrical environments.
FAQ
What is the maximum input voltage range supported by the MAX14001AAP+?
The MAX14001AAP+ itself accepts 0V–1.25V at its AIN pin, but with an external resistor divider, it supports field-side input voltages from 12V to 300V DC. The device's 3.75kVRMS isolation rating and 5.5mm creepage ensure safe operation at these levels when properly laid out per IEC 61000-4-5 surge and IEC 60664-1 insulation coordination standards. The MAX14001AAP+ does not directly sense high voltage-it conditions scaled-down representations with calibrated accuracy.
How does the MAX14001AAP+ enable field-side diagnostics without an external power source?
The MAX14001AAP+ integrates an isolated DC-DC converter powered by VDD (3.0V–3.6V logic supply), generating VDDF to power all field-side circuitry-including the ADC, comparators, and current DACs-even when no input signal is present. This allows continuous self-tests, reference validation, and leakage checks on the field side independent of the binary input voltage, a capability confirmed in the device's functional description and typical operating characteristics.
Can the MAX14001AAP+ drive standard N-channel MOSFETs for inrush control?
No-the MAX14001AAP+ is designed to drive external depletion-mode high-voltage FETs (e.g., IXTY08N100D2), not enhancement-mode N-channel MOSFETs. Its GATE pin provides a buffered ~3.6V bias referenced to GNDF, insufficient to fully enhance most N-channel devices at high drain voltages. The datasheet explicitly specifies depletion-mode FET usage and includes gate drive capacitor recommendations (0.01µF to GNDF) aligned with depletion-mode gate characteristics.
What is the difference between voltage-triggered and FAST inrush modes in the MAX14001AAP+?
Voltage-triggered mode initiates inrush when the ADC reading crosses the INRT threshold; FAST mode triggers inrush as soon as the external FET can sink current-bypassing ADC conversion delay. Voltage mode enables precise voltage-based contact closure detection, while FAST mode offers minimal latency for time-critical applications. Only the MAX14001AAP+ supports both; the MAX14002AAP+ is FAST-mode only, as stated in the "High-Voltage FET Current Control" section.
Does the MAX14001AAP+ support external voltage references, and what are the limitations?
Yes-the MAX14001AAP+ supports both internal (1.25V ±5%) and external references via the REFIN pin. External references may be series-type (powered from VDDF) or shunt-type (powered by internal 70µA current source), but must draw ≤70µA total. Series references require 0.1µF bypass to AGND; shunt types connect directly between REFIN and AGND. Configuration is done via CFG register bits EXRF and EXTI, as defined in Table 1 of the datasheet.
MAX14001AAP+ 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:
- -
MAX14001AAP+ FAQ
1.How can I place an order for MAX14001AAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14001AAP+ 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 MAX14001AAP+ reliable?
The price and inventory of MAX14001AAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14001AAP+ is usually 5 days.
3.What payment methods are accepted for MAX14001AAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14001AAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14001AAP+?
MAX14001AAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14001AAP+ 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 MAX14001AAP+?
For technical support, including MAX14001AAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14001AAP+ requirements.
6.How does Aetrix verify that MAX14001AAP+ is sourced from the original manufacturer or authorized distributors?
All MAX14001AAP+ 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 MAX14001AAP+ meets industry standards.
7.What is the process for return or replacement of MAX14001AAP+?
All MAX14001AAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14001AAP+, 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 MAX14001AAP+ part is unused and in its original packaging.
Return procedure for MAX14001AAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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