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Analog Devices Inc./Maxim Integrated MAX22199ATJ+
- Part No.:
- MAX22199ATJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX22199ATJ+.pdf
- Description:
- IC OCTAL DIGITAL INPUT SPI TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:609
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Product details
Overview
MAX22199ATJ+ from Maxim Integrated is an IEC 61131-2 compliant octal industrial digital input IC that translates eight 24V current-sinking field inputs into a serialized SPI-compatible output for 3V–5.5V logic systems. It supports Type 1/Type 3 (8-channel) or Type 2 (4-channel) configurations, features integrated 3.3V LDO (25mA), programmable per-channel glitch filtering (50µs–20ms), and operates across –40°C to +125°C ambient. It is used in PLC input modules for factory automation signal acquisition.
For engineers reviewing the MAX22199ATJ+ datasheet, MAX22199ATJ+ pinout, MAX22199ATJ+ application, or MAX22199ATJ+ equivalent, this page delivers verified technical context, exact pin functions, real-world diagnostic capabilities (thermal shutdown, VDD24 UV/VM alarms, CRC error detection), and validated alternative options for industrial control system design.
Technical Context
The MAX22199ATJ+ implements a dual-supply architecture: field-side VDD24 (7V–65V) powers input conditioning and generates regulated 3.3V on VDD (25mA), while logic-side VL (3.0V–5.5V) controls SPI interface voltage levels. Its 8-channel serializer uses synchronous sampling triggered by CS or LATCH, enabling multi-device synchronization in distributed I/O systems.
Each input channel includes independently programmable digital filtering via FLT_ registers, supporting bypass mode (1MHz sampling) or eight selectable delays (50µs–20ms). Input current limiting (±11% accuracy, 0.5–3.4mA range) and energyless LED drivers are implemented using external REFDI and IN_/LED_ resistor networks per IEC 61131-2 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Channels | 8 independent current-sinking digital inputs, configurable as eight Type 1/3 or four Type 2 per IEC 61131-2. |
| VDD24 Supply Range | 7V to 65V - accepts wide-range industrial field supply without external regulation. |
| LDO Output | 3.3V ±10%, 25mA max - powers internal circuitry and external logic, eliminating need for separate 3.3V rail. |
| SPI Interface | 4-wire (CS/SCLK/SDI/SDO), 10MHz max clock, 3.0V–5.5V logic-level compatible via VL pin. |
| Input Filter Delay | Selectable per channel: 50µs, 100µs, 400µs, 800µs, 1.6ms, 3.2ms, 12.8ms, or 20ms - replaces analog RC filters. |
| Operating Temperature | –40°C to +125°C ambient - qualified for harsh industrial environments including motor control cabinets. |
| ESD Protection | ±8kV contact / ±15kV air-gap (IEC 61000-4-2, with ≥1kΩ series resistor) - ensures robustness in factory settings. |
Pinout & Package
MAX22199ATJ+ is housed in a 32-pin 5mm × 5mm TQFN package with exposed thermal pad (EP), optimized for high-density industrial PCB layouts and thermal dissipation (θJA = 36°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN8 | Field input terminals | Current-sinking inputs accepting 24V signals; each requires external 1.5kΩ (Type 1/3) or 1kΩ (Type 2) series resistor. |
| LED1–LED8 | Energyless LED driver outputs | Sink current when corresponding IN_ is active - enables status indication without added power loss. |
| VDD24 | Field supply input | Accepts 7V–65V; powers internal LDO and input stages; bypassed with 0.1µF || 1µF to GND. |
| VDD | LDO output / logic supply input | Provides or accepts 3.3V (regulated) / 3.0–5.5V (external); powers core logic and SPI interface. |
| VL | SPI logic level reference | Sets SCLK/CS/SDI/SDO voltage thresholds (0.3×VL / 0.7×VL); enables 3.3V or 5V SPI compatibility. |
| CS, SCLK, SDI, SDO | SPI interface signals | Standard 4-wire SPI; SDO is tri-state when CS high; supports daisy-chain or direct connection modes. |
| LATCH | Multi-device synchronization input | Frozen input sampling across multiple MAX22199ATJ+ devices - critical for deterministic I/O timing in DCS. |
| FAULT, READY | Open-drain status indicators | FAULT asserts low on thermal shutdown, VDD24 UV/VM, CRC error; READY goes low when powered and stable. |
| REFDI | Input current reference node | Connect 7.5kΩ (Type 1/3) or 5.2kΩ (Type 2) resistor to GND to set precise input current limit (2.35mA typ / 3.39mA typ). |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61131-2 Compliance | Validated for Type 1, Type 2 (dual-channel), and Type 3 digital inputs - eliminates need for external compliance validation. |
| Programmable Per-Channel Filtering | Eight discrete delay options (50µs–20ms) per IN_, configured via FLT_ register - enables noise rejection without analog components. |
| Integrated 3.3V LDO | 25mA output with ±10% regulation over 7V–65V VDD24 range - reduces BOM count and simplifies power tree design. |
| Energyless LED Drivers | IN_ current diverted to LED_ pins - provides visual status without increasing total system power consumption. |
| Advanced Diagnostics | Real-time monitoring of VDD24 under/mising voltage, thermal shutdown (165°C), and SPI CRC errors - all configurable to trigger FAULT pin. |
Applications
| Programmable Logic Controller (PLC) Input Module | Distributed Control System (DCS) Remote I/O |
|---|---|
Use Scenario: 24V sensor signals from proximity switches, limit switches, and pushbuttons are acquired in modular PLC backplanes. IC Role / Device Role / Timing Role: Translates eight isolated field inputs into serialized SPI data synchronized across multiple slots via LATCH. Use Value: Reduces component count vs. discrete optocoupler-based solutions and enables deterministic sampling in cyclic scan architectures. |
Use Scenario: Field devices in oil & gas or water treatment plants connect to remote I/O heads located near hazardous zones. IC Role / Device Role / Timing Role: Provides fault-tolerant, ESD-hardened digital input conditioning with VDD24 UV/VM alarms for predictive maintenance. Use Value: Enables early detection of failing field wiring or power supply degradation before process interruption occurs. |
| Industrial Motor Control Cabinet | Smart Building Automation System |
Use Scenario: Monitoring emergency stop circuits, thermal overload contacts, and position feedback from servo drives. IC Role / Device Role / Timing Role: Operates at full –40°C to +125°C ambient with thermal shutdown protection during cabinet overheating events. Use Value: Maintains functional safety integrity without derating, even in enclosed enclosures with limited airflow. |
Use Scenario: Integrating HVAC actuators, lighting controls, and access sensors into centralized BACnet/IP or Modbus gateways. IC Role / Device Role / Timing Role: Interfaces legacy 24V dry-contact sensors to microcontroller-based edge controllers via compact SPI bus. Use Value: Eliminates need for external level shifters or isolated SPI isolators due to native 3.3V/5V logic compatibility and robust EMC performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar industrial digital input applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX22190ATJ+ | Pin-to-pin and register-compatible; identical pinout, same LDO, same filtering, but lacks LATCH input and daisy-chain support. | Best suited for single-device, non-synchronized I/O nodes where multi-device timing alignment is unnecessary. | Select MAX22190ATJ+ only if LATCH functionality and inter-device synchronization are not required - reduces software complexity. |
| TI ISO1211DR | Isolated 24V digital input with integrated galvanic isolation (2.5kVRMS); no integrated LDO; requires external 3.3V supply; SPI interface not included. | Used where reinforced isolation between field and logic sides is mandated (e.g., safety-critical zones), but adds external SPI ADC or microcontroller overhead. | Choose ISO1211DR only when regulatory isolation certification (IEC 62368, UL 61800-5-1) is required - MAX22199ATJ+ is non-isolated, field-side referenced. |
Compared with MAX22190ATJ+, the MAX22199ATJ+ adds LATCH-driven synchronization for deterministic multi-device sampling; compared with ISO1211DR, it integrates LDO and SPI serialization but requires external isolation if mandated by system architecture.
Availability
MAX22199ATJ+ is available at Aetrix Electronics and suitable for programmable logic controllers, distributed control systems, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for MAX22199ATJ+ 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 precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX22199ATJ+ belongs to Maxim's industrial interface product line, engineered specifically for high-reliability, low-power, and standards-compliant digital input acquisition in harsh factory environments.
FAQ
What is the maximum field supply voltage supported by the MAX22199ATJ+?
The MAX22199ATJ+ supports a VDD24 input range of 7V to 65V, enabling direct connection to unregulated industrial 24V rails and accommodating brownout conditions up to 65V transients. Absolute maximum rating is +70V, but continuous operation above 65V is not guaranteed per datasheet specifications.
Does the MAX22199ATJ+ provide galvanic isolation between field and logic sides?
No, the MAX22199ATJ+ is a non-isolated digital input device - field-side inputs (IN1–IN8, VDD24, GND) share a common ground reference with logic-side pins (VDD, VL, SPI). For applications requiring reinforced isolation, external isolators (e.g., ISO1211DR) or isolated power supplies must be used in conjunction with MAX22199ATJ+.
How is input current limiting configured on the MAX22199ATJ+?
Input current limiting on the MAX22199ATJ+ is set by an external resistor (RREFDI) from the REFDI pin to GND: 7.5kΩ yields ~2.35mA for Type 1/3 inputs; 5.2kΩ yields ~3.39mA for Type 2 inputs. The relationship follows RREFDI = 17.63V ÷ IINLIM, ensuring ±11% accuracy across temperature and supply variations.
Can the MAX22199ATJ+ operate without an external field supply?
Yes - the MAX22199ATJ+ can be powered solely from the logic-side VDD pin (3.0V–5.5V). In this configuration, VDD24 must remain unconnected, the internal LDO is disabled, and field inputs require an external 24V source with return path through shared GND. All digital functionality remains fully operational.
What diagnostic alerts does the FAULT pin indicate on the MAX22199ATJ+?
The FAULT pin on the MAX22199ATJ+ asserts low for thermal shutdown (165°C), VDD24 under-voltage (<6.8V), VDD24 missing voltage (<12.1V), SPI communication errors (CRC failure), and internal register faults. Each condition is individually readable via FAULT1/FAULT2 registers, allowing precise root-cause identification in field deployments.
MAX22199ATJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Controller, Motor Controller
- Interface:
- SPI
- Voltage - Supply:
- 3V ~ 5.5V
- Supplier Device Package:
- 32-TQFN (5x5)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
MAX22199ATJ+ FAQ
1.How can I place an order for MAX22199ATJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22199ATJ+ 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 MAX22199ATJ+ reliable?
The price and inventory of MAX22199ATJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22199ATJ+ is usually 5 days.
3.What payment methods are accepted for MAX22199ATJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22199ATJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22199ATJ+?
MAX22199ATJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22199ATJ+ 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 MAX22199ATJ+?
For technical support, including MAX22199ATJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22199ATJ+ requirements.
6.How does Aetrix verify that MAX22199ATJ+ is sourced from the original manufacturer or authorized distributors?
All MAX22199ATJ+ 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 MAX22199ATJ+ meets industry standards.
7.What is the process for return or replacement of MAX22199ATJ+?
All MAX22199ATJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22199ATJ+, 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 MAX22199ATJ+ part is unused and in its original packaging.
Return procedure for MAX22199ATJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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