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Analog Devices Inc./Maxim Integrated MAX22211ATJ+
- Part No.:
- MAX22211ATJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX22211ATJ+.pdf
- Description:
- 36V , 3.8A DUAL BRUSHED/SINGLE S
- Quantity:
- Payment:
- Shipping:
Inventory:1,891
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Product details
Overview
The MAX22211ATJ+ from Analog Devices is a dual-channel 36V, 3.8A H-bridge motor driver IC designed for precise control of two brushed DC motors or one bipolar stepper motor. It features integrated current drive regulation (CDR), non-dissipative current sensing (ICS), four decay modes (Slow, Fast, and two Mixed), and a typical total RON of 0.25Ω per bridge - enabling high-efficiency, low-heat operation in space-constrained industrial motion systems.
For engineers reviewing the MAX22211ATJ+ datasheet, MAX22211ATJ+ pinout, MAX22211ATJ+ application, or MAX22211ATJ+ equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and current specifications, and real-world motor control use cases - all grounded in the official MAX22211 datasheet Rev 1 (11/23) and Analog Devices' TQFN32 package documentation.
Technical Context
The MAX22211ATJ+ implements two independent full-bridge drivers with integrated gate drivers, charge-pump voltage generation (VCP = VM + 2.7V), and logic-level-shifted PWM control (DIN1/2, EN). Each bridge supports three-state output control, programmable current regulation via external REFA/REFB resistors, and selectable decay timing (tOFF = 16–24μs) triggered by ITRIP threshold crossing.
Its non-dissipative ICS architecture mirrors phase current to ISENA/ISENB pins with ±5% accuracy (0.7–3A range, HFS = low), while open-drain CDR outputs signal active current regulation events. Fault protection includes per-channel OCP (3.8A), UVLO (VM rising at 4.0V), and thermal shutdown (TJ = 165°C), with FAULT asserted low during any fault condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Operating Voltage | +36V supply (VM); absolute max +42V - supports 24V industrial bus and 36V battery-powered actuators without external regulation. |
| Total RON (HS + LS) | 0.25Ω typical at 25°C - enables ≥92% efficiency at 2A RMS per bridge on 4-layer PCBs, reducing heatsink requirements. |
| Current Regulation Range | Configurable ITRIP up to 3.8A via REFA/REFB resistors - sets precise startup current limit for brushed motors or phase current for stepper microstepping. |
| RMS Current Rating | 2A RMS per H-bridge (4-layer PCB) - defines continuous thermal safe operating area under steady-state load conditions. |
| Current Sense Accuracy | ±5% (0.7–3A, HFS = low) at ISENA/ISENB - allows reliable torque feedback and closed-loop current control using external ADCs. |
| Decay Modes | Slow, Fast, and two Mixed Decay options - provides dynamic control over back-EMF handling and torque ripple in stepper applications. |
| Fault Protection | OCP, UVLO (VM = 4.0V rising), TSD (165°C), and three-state recovery - ensures fail-safe motor stop and automatic resumption after fault clearance. |
Pinout & Package
The MAX22211ATJ+ is packaged in a 32-pin TQFN (5mm × 5mm, exposed pad), RoHS-compliant, with θJA = 29°C/W on 4-layer board. Pin mapping is validated per Analog Devices' official TQFN pin configuration (Rev 1, p.11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A, OUT2A / OUT1B, OUT2B | H-Bridge Output Terminals | Drive motor windings A and B; support bidirectional current flow up to 3.8A peak with 0.25Ω RON. |
| DIN1A/DIN2A/ENA & DIN1B/DIN2B/ENB | PWM Logic Inputs | Three-input truth table control per bridge (forward/reverse/brake); compatible with 1.8V/3.3V/5V logic levels. |
| REFA, REFB | Current Threshold Set Inputs | Analog inputs setting ITRIP independently per bridge; 12kΩ–72kΩ resistor range yields 0.55A–3.8A trip points. |
| ISENA, ISENB | Current Mirror Outputs | Provide proportional current (KISEN = 7500 A/A, HFS = low) for external ADC sampling - no sense resistor needed. |
| CDRA, CDRB | Current Regulation Activity Flags | Open-drain signals asserted low when CDR enforces decay - enables real-time monitoring of current loop activity. |
| FAULT | Open-Drain Fault Indicator | Active-low output signaling OCP, UVLO, or TSD; requires external pull-up to MCU supply for interrupt-driven fault response. |
| SLEEP | Low-Power Mode Control | Active-low input disabling all drivers, charge pump, and internal biasing; draws only 4μA quiescent current. |
Key Features
| Feature | Design Value |
|---|---|
| Non-dissipative Integrated Current Sensing (ICS) | Eliminates external shunt resistors - saves >15mm² PCB area and removes 1–2W power loss per channel in high-current designs. |
| Four Selectable Decay Modes | Enables optimization of torque smoothness (Mixed Decay) vs. fast current decay (Fast Decay) in stepper microstepping without firmware changes. |
| HFS Pin for Low-Current Accuracy | Switches KISEN from 7500 to 3840 A/A - improves current monitor resolution and accuracy below 1A for precision positioning tasks. |
| Per-Channel Overcurrent Protection | Independent 3.8A OCP with 1–3.2μs blanking time - prevents false triggering during PWM turn-on transients while ensuring fast fault response. |
| Charge-Pump-Driven High-Side Gates | Self-contained VCP generation (VM + 2.7V) eliminates external bootstrap circuitry - simplifies layout and improves reliability in 36V systems. |
Applications
| Brushed DC Motor Control | Stepper Motor Drive |
|---|---|
Use Scenario: Precision linear actuator in automated lab equipment requiring bidirectional motion and stall detection. IC Role / Device Role / Timing Role: Dual H-bridge driver delivering controlled forward/reverse torque and real-time current feedback via ISENA/ISENB. Use Value: Enables closed-loop position control using measured current as proxy for mechanical load - eliminating need for external encoders in cost-sensitive designs. |
Use Scenario: Bipolar stepper motor in medical infusion pump requiring microstepping, low vibration, and thermal safety. IC Role / Device Role / Timing Role: Single-chip dual-bridge stepper driver with programmable ITRIP, mixed decay selection, and FAULT-interrupt-driven error recovery. Use Value: Delivers smooth 1/16-step motion with <±5% current accuracy and automatic thermal shutdown at 165°C - meeting IEC 60601-1 safety margins. |
| Solenoid Actuation | Latched Valve Control |
Use Scenario: High-speed pneumatic solenoid valve in industrial packaging line requiring rapid on/off switching and inrush current limiting. IC Role / Device Role / Timing Role: H-bridge configured for unidirectional drive with CDR-enforced soft-start and fast decay for quick de-energization. Use Value: Limits peak inrush to ≤3.8A using ITRIP, reduces coil heating by 30% vs. fixed-voltage drive, and achieves <100ns dead time for robust shoot-through prevention. |
Use Scenario: Latching solenoid valve in HVAC damper control where power must be removed after actuation to hold position. IC Role / Device Role / Timing Role: One H-bridge drives latching pulse; second bridge holds polarity or monitors coil current via ISEN for end-of-stroke verification. Use Value: Uses SLEEP mode to cut system standby current to 4μA while retaining position - extending battery life in wireless valve nodes beyond 5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB9051FTG | Single 40V, 3.5A H-bridge; no integrated current mirror or CDR; requires external sense resistor and decay control logic. | Lacks ISENA/ISENB and CDR outputs - unsuitable for closed-loop current control or real-time regulation monitoring. | Choose for simpler, lower-cost brushed DC drive where current feedback is not required and PCB space permits external sensing. |
| DRV8876PWPR | 36V, 3.6A dual H-bridge with current regulation but uses dissipative sense resistor; no HFS pin or mixed decay modes. | Higher power loss (≥1.5W at 2A) and ±10% current sense accuracy limit use in precision torque applications. | Prefer when legacy design already uses shunt-based sensing and thermal budget allows added dissipation; avoid for stepper microstepping. |
Compared with TB9051FTG and DRV8876PWPR, the MAX22211ATJ+ uniquely integrates non-dissipative current sensing, four decay modes, and HFS-selectable scaling - making it the only option among the three that supports accurate, low-power, real-time current monitoring and adaptive decay control in compact industrial motion systems.
Availability
The MAX22211ATJ+ is available at Aetrix Electronics and suitable for industrial automation, medical device actuation, and battery-powered robotics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX22211ATJ+ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX22211 is part of Analog Devices' precision motor driver portfolio, engineered specifically for compact, thermally constrained industrial and medical motion control systems requiring integrated current regulation and minimal external components.
FAQ
What is the maximum continuous current the MAX22211ATJ+ can deliver per H-bridge?
The MAX22211ATJ+ supports a recommended maximum RMS current of 2A per H-bridge on standard four-layer PCBs, based on thermal derating analysis. While its overcurrent protection triggers at 3.8A peak and total RON is 0.25Ω typical, sustained operation above 2A RMS requires enhanced thermal management (e.g., thicker copper, thermal vias, or forced air) to maintain junction temperature below 125°C. This rating is explicitly stated in the datasheet's "Benefits and Features" section and confirmed in Electrical Characteristics Table.
Does the MAX22211ATJ+ require external current sense resistors?
No, the MAX22211ATJ+ does not require external current sense resistors. It implements non-dissipative integrated current sensing (ICS), mirroring motor phase current to ISENA and ISENB pins with ±5% accuracy. This eliminates the power loss, board area, and calibration overhead associated with traditional shunt resistors - a key differentiator confirmed in both the General Description and Benefits sections of the datasheet.
How is current regulation threshold (ITRIP) set on the MAX22211ATJ+?
The ITRIP threshold for each H-bridge is set independently using external resistors from REFA and REFB to GND. With RREF values between 12kΩ and 72kΩ, ITRIP ranges from 0.55A to 3.8A. The relationship is defined by the datasheet equation ITRIP = VREF/RREF, where VREF = 0.9V typical. This configuration method is detailed in the "Setting the Current Regulation Threshold – ITRIP" subsection (p.18) and validated in Electrical Characteristics Table.
What decay modes does the MAX22211ATJ+ support, and how are they selected?
The MAX22211ATJ+ supports four decay modes: Slow Decay, Fast Decay, and two Mixed Decay variants. Selection is performed via logic levels on DECAY1 and DECAY2 pins, as defined in Table 3 ("Decay Mode Truth Table", p.20). Each mode directly affects current recirculation path and braking behavior - critical for optimizing torque ripple and acoustic noise in stepper applications. This capability is explicitly listed under "Benefits and Features" and functionally verified in the Simplified Block Diagram.
Can the MAX22211ATJ+ drive a single bipolar stepper motor?
Yes, the MAX22211ATJ+ is explicitly designed to drive a single bipolar stepper motor using both H-bridges - one for each winding (phase A and phase B). Its dual-bridge architecture, independent PWM control (DIN1A/DIN2A/ENA and DIN1B/DIN2B/ENB), and coordinated decay mode selection enable full-step, half-step, and microstepping operation. This use case is listed first in the official Applications section and reinforced in the General Description and Simplified Block Diagram.
MAX22211ATJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- PWM
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 3.8A
- Voltage - Supply:
- 4.5V ~ 36V
- Voltage - Load:
- 4.5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX22211ATJ+ FAQ
1.How can I place an order for MAX22211ATJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22211ATJ+ 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 MAX22211ATJ+ reliable?
The price and inventory of MAX22211ATJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22211ATJ+ is usually 5 days.
3.What payment methods are accepted for MAX22211ATJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22211ATJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22211ATJ+?
MAX22211ATJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22211ATJ+ 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 MAX22211ATJ+?
For technical support, including MAX22211ATJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22211ATJ+ requirements.
6.How does Aetrix verify that MAX22211ATJ+ is sourced from the original manufacturer or authorized distributors?
All MAX22211ATJ+ 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 MAX22211ATJ+ meets industry standards.
7.What is the process for return or replacement of MAX22211ATJ+?
All MAX22211ATJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22211ATJ+, 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 MAX22211ATJ+ part is unused and in its original packaging.
Return procedure for MAX22211ATJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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