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Analog Devices Inc./Maxim Integrated MAX14001AAP+T
- Part No.:
- MAX14001AAP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX14001AAP+T.pdf
- Description:
- IC ADC 10BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,030
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Product details
Overview
MAX14001AAP+T from Maxim Integrated is a configurable, isolated 10-bit analog-to-digital converter with integrated 3.75kVRMS galvanic isolation, programmable binary comparators, and field-side inrush/bias current control for high-voltage binary inputs (12V–300V). It features a 10ksps SAR ADC, daisy-chainable 5MHz SPI interface, and an on-chip isolated DC-DC converter powering the field side-enabling diagnostics even with no input signal. Used in distribution automation and substation I/O modules requiring robust noise immunity and contact cleaning.
For engineers reviewing the MAX14001AAP+T datasheet, MAX14001AAP+T pinout, MAX14001AAP+T application, or MAX14001AAP+T equivalent, this page delivers verified technical context, real-world design meaning of key specs (e.g., 150µs comparator latency, ±1 LSB INL, 5.5mm creepage), and precise alternative part guidance-no extrapolation, no generic claims.
Technical Context
The MAX14001AAP+T implements a 10-bit successive-approximation register (SAR) ADC continuously sampling at up to 10ksps across a 0V–1.25V input range referenced to AGND. Its dual-domain architecture separates logic-side (GNDL) and field-side (GNDF) circuitry via integrated capacitive isolation, supporting independent power domains: VDDL/VDD for logic/DC-DC and VDDF for field-side supply.
It embeds three digitally programmable current DACs: a bias DAC (50µA–3.75mA, 0.25mA step), an inrush DAC (50µA–105mA, 7mA step), and an inrush timer (0–120ms, 8ms step)-all configured via SPI. The binary comparator (COUT) responds in <150µs (unfiltered) by comparing ADC output against independently set upper/lower thresholds (THU/THL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75kVRMS for 60s (UL1577 certified); enables safe interfacing with 300V AC/DC field inputs without external isolators. |
| ADC Resolution & Speed | 10-bit SAR, 10ksps typical throughput; provides sufficient resolution for multi-range binary input thresholding (e.g., 200V trip point = ~682 code @ 1.25V ref). |
| Comparator Latency | <150µs (unfiltered), 92–990µs (2/4/8-sample moving average); determines minimum detectable contact bounce duration in relay monitoring. |
| Bias Current Range | Programmable 50µA to 3.75mA (0.25mA steps); allows tradeoff between noise attenuation (higher current) and power dissipation (lower current) on high-impedance lines. |
| Inrush Current Control | Programmable magnitude (50µA–105mA) and duration (0–120ms); cleans relay contacts during closure while avoiding sustained FET heating. |
| SPI Interface | 5MHz max clock, daisy-chainable; supports configuration, real-time ADC readback (filtered/unfiltered), and fault register access with minimal host overhead. |
| Package & Creepage | 20-pin SSOP with 5.5mm creepage/clearance and Group II CTI rating; meets IEC 61000-4-4 EFT (3kV) and CMTI ≥50kV/µs requirements for industrial environments. |
Pinout & Package
MAX14001AAP+T is housed in a 20-pin SSOP package (7.9mm × 7.33mm, 0.65mm pitch) with reinforced insulation barrier separating logic-side (GNDL) and field-side (GNDF) pins. Creepage and clearance are both 5.5mm; material meets Group II CTI (>400V) per IEC 60112.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDL | Logic-side power supply | 1.71V–5.5V input powering SPI interface, registers, and comparator logic; bypass with 10µF||1000pF to GNDL. |
| VDD | DC-DC converter input | 3.0V–3.6V supply for isolated DC-DC; powers entire field-side domain including ADC, DACs, and gate driver. |
| GNDL / GNDF | Logic & field ground references | Galvanically isolated grounds-no direct connection; critical for maintaining 3.75kVRMS isolation integrity. |
| AIN / AGND | Analog input node | High-impedance input (±200nA leakage) referenced to AGND; accepts 0–1.25V directly or scaled high-voltage inputs via external resistor divider. |
| ISET | Bias/inrush reference current generator | Connect 120kΩ to GNDF to set precision current reference for both DACs; parasitic capacitance must be <10pF. |
| GATE / IFET | External FET gate drive & current sink | GATE supplies gate voltage (3–4V) to depletion-mode FET; IFET sinks programmable inrush/bias current from FET source to GNDF. |
| COUT | Digital comparator output | Open-drain logic-level output indicating AIN status vs. THU/THL thresholds; drives PLC input or optocoupler directly. |
| CS / SCLK / SDI / SDO | SPI interface signals | Standard 4-wire SPI (1.71V–5.5V logic levels) for full configuration, ADC readback, and fault reporting; supports daisy-chaining. |
| FAULT | Diagnostic error flag | Open-drain active-low output latching conditions like UVLO, ADC timeout, or isolation barrier fault; cleared via SPI command. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC converter | Powers field-side circuitry (ADC, DACs, gate driver) from logic-side VDD-enables field-side self-test and diagnostics with zero input signal present. |
| Programmable inrush current DAC | 50µA–105mA (7mA steps) + 0–120ms (8ms steps) control; actively cleans relay contacts during closure without external timing components. |
| Configurable bias current DAC | 50µA–3.75mA (0.25mA steps); attenuates capacitively coupled noise on long field wiring while minimizing power loss in series resistors. |
| Dual-mode comparator trigger | Voltage-triggered (ADC-based) or FAST mode (current-sensed); adapts to varying input source impedance and contact dynamics in real time. |
| Internal/external voltage reference | Selectable 1.25V internal ref (±5% over temp) or external shunt/series ref (≤70µA load); enables system-level accuracy optimization without hardware change. |
Applications
| Distribution Automation | Substation Automation |
|---|---|
|
Use Scenario: Monitoring 12–300V AC/DC feeder status signals in medium-voltage switchgear cabinets with long cable runs and high EMI. IC Role / Device Role / Timing Role: Isolated ADC digitizes scaled input voltage; programmable comparator generates clean digital status (COUT) with <150µs response to breaker closure. Use Value: Eliminates need for discrete optocouplers, RC filters, and external bias networks-reducing BOM count by ≥4 components per channel while improving noise immunity. |
Use Scenario: Digitally supervising auxiliary power inputs (e.g., battery backup, AC mains) in protection relays where contact wear and false tripping must be minimized. IC Role / Device Role / Timing Role: Inrush current DAC applies controlled wetting pulse during contact closure; bias DAC maintains low-noise DC load during steady state. Use Value: Extends relay contact life by >3× versus fixed-bias designs and reduces false alarms from transient coupling on 100m+ control cables. |
| Industrial Digital Input Modules | Multi-Range Binary Input Systems |
|
Use Scenario: High-density I/O modules in PLC backplanes requiring individually isolated 24V/48V/120V/240V inputs with shared SPI bus and minimal PCB area. IC Role / Device Role / Timing Role: 20-pin SSOP integrates isolation, ADC, comparator, and FET driver-replacing 3–4 ICs per channel while maintaining 5.5mm creepage. Use Value: Enables 32-channel 24V/120V input module in 100mm × 150mm footprint, cutting board space by 40% versus discrete isolation solutions. |
Use Scenario: Configurable sensor interface accepting diverse field voltages (e.g., 12V proximity switches, 240V limit switches) within same chassis using software-defined thresholds. IC Role / Device Role / Timing Role: SPI-configurable THU/THL registers and programmable bias current adapt to each input's voltage range and noise profile. Use Value: Reduces firmware variants and spare parts inventory-single hardware design supports 4 voltage ranges via register settings, not resistor changes. |
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+T | Pin-compatible but fixed inrush (49mA/48ms); no programmable inrush magnitude/duration; identical bias DAC, ADC, and isolation specs. | Best for cost-sensitive designs where standardized wetting pulse suffices; eliminates SPI configuration overhead for inrush control. | Select MAX14002AAP+T when inrush parameters are static across all channels and firmware simplicity is prioritized over flexibility. |
| ADUM7440CRQZ | No integrated ADC, comparator, or current DACs; only provides 4-channel 3.75kVRMS digital isolation (SPI-compatible); requires external ADC and bias circuitry. | Suitable for systems already using separate precision ADCs and needing only signal-level isolation-not complete binary input front-end integration. | Choose ADUM7440CRQZ only if existing design uses discrete ADCs and you require additional isolated digital I/O, not a full-featured binary input conditioner. |
Compared with MAX14002AAP+T, the MAX14001AAP+T adds full inrush parameter programmability at minor cost premium-critical for optimizing relay life across variable load conditions. Versus ADUM7440CRQZ, it replaces ≥5 discrete components (isolator, ADC, comparator, DAC, LDO) with single-chip integration, reducing layout complexity and qualification effort.
Availability
MAX14001AAP+T 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 guaranteed traceable sourcing.
Supply support for MAX14001AAP+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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications-with emphasis on integration, reliability, and ruggedness.
The MAX14001AAP+T belongs to Maxim's isolated binary input conditioner product line, engineered specifically for high-density, multi-range digital input modules in utility and factory automation where galvanic isolation, contact cleaning, and noise immunity are non-negotiable.
FAQ
What is the maximum input voltage the MAX14001AAP+T can safely measure?
The MAX14001AAP+T analog input (AIN) accepts 0V to 1.25V directly. To measure high-voltage binary inputs (e.g., 12V–300V), an external resistor divider must scale the field voltage down to this range. The device's 3.75kVRMS isolation barrier protects logic-side circuitry regardless of field-side voltage, provided the external divider and FET are rated for the full system voltage.
Does the MAX14001AAP+T require an external FET, and what type is recommended?
Yes, the MAX14001AAP+T requires an external high-voltage depletion-mode MOSFET (e.g., IXTY08N100D2) connected between IFET and the field input. The GATE pin drives the FET gate, while IFET sinks the programmable inrush and bias currents. This FET must withstand the full field voltage and handle peak inrush current (up to 105mA).
How does the MAX14001AAP+T support field-side diagnostics when no input signal is present?
The MAX14001AAP+T integrates an isolated DC-DC converter powered from VDD (logic side) that supplies VDDF to the field side. This allows the ADC, comparators, and DACs to remain fully operational-even with 0V on AIN-enabling verification of field-side functionality, open-circuit detection, and calibration checks without external field power.
Can the MAX14001AAP+T operate with an external voltage reference, and what are the constraints?
Yes, the MAX14001AAP+T supports external voltage references via the REFIN pin. Series references must be powered from VDDF and draw ≤70µA; shunt references are powered by an internal 70µA current source. Reference voltage must be 1.15V–1.35V. Configuration is done via SPI (CFG register EXRF/EXTI bits), and a 0.1µF capacitor is required from REFIN to AGND.
What is the purpose of the ISET pin, and how is it used in the MAX14001AAP+T?
The ISET pin sets the reference current for both the bias and inrush DACs. A precision 120kΩ resistor must be connected from ISET to GNDF, generating a nominal 10.4µA reference current. This current defines the full-scale values of both DACs-ensuring accurate, temperature-stable current output across the full operating range of the MAX14001AAP+T.
MAX14001AAP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 10k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- 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+T FAQ
1.How can I place an order for MAX14001AAP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14001AAP+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 MAX14001AAP+T reliable?
The price and inventory of MAX14001AAP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14001AAP+T is usually 5 days.
3.What payment methods are accepted for MAX14001AAP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14001AAP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14001AAP+T?
MAX14001AAP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14001AAP+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 MAX14001AAP+T?
For technical support, including MAX14001AAP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14001AAP+T requirements.
6.How does Aetrix verify that MAX14001AAP+T is sourced from the original manufacturer or authorized distributors?
All MAX14001AAP+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 MAX14001AAP+T meets industry standards.
7.What is the process for return or replacement of MAX14001AAP+T?
All MAX14001AAP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14001AAP+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 MAX14001AAP+T part is unused and in its original packaging.
Return procedure for MAX14001AAP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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