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Analog Devices Inc./Maxim Integrated MAX22204ATU+T
- Part No.:
- MAX22204ATU+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
MAX22204ATU+T.pdf
- Description:
- DUAL H-BRIDGE FOR STEPPER AND BR
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
The MAX22204ATU+T from Analog Devices is a two-phase stepper motor driver IC integrating two 65V, 3.8AMAX H-bridges with 0.3Ω typical total RON, 128-microstep indexer, integrated current sensing (ICS), and STEP/DIR interface. It delivers up to 2ARMS per phase at +24V supply and 25°C ambient with proper PCB thermal design, enabling smooth, quiet motion control in compact industrial actuators.
For engineers reviewing the MAX22204ATU+T datasheet, MAX22204ATU+T pinout, MAX22204ATU+T application, or MAX22204ATU+T equivalent, key selection criteria include its 65V voltage rating, dual-channel ICS architecture eliminating external sense resistors, TRQ-controlled dual-torque mode, adaptive decay operation, and TSSOP38 package compatibility with space-constrained motion systems.
Technical Context
The MAX22204ATU+T implements a fixed OFF-time PWM current regulation architecture with programmable tOFF via ROFF pin and full-scale current set by REF pin resistor (13–60kΩ). Its non-dissipative Integrated Current Sensing (ICS) monitors low-side FET current and outputs proportional replica currents on ISENA/ISENB pins (KISEN = 7500 A/A).
It integrates a 128-step indexer with MODE[2:0] selectable microstepping (1/128 to full-step), supports slow/mixed/adaptive decay modes, and features independent channel OCP (3.8A threshold), thermal shutdown at 155°C, and UVLO at 4.0V nominal - all signaled via open-drain FAULT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VM = +4.5V to +65V - supports wide-input industrial and battery-powered stepper systems without external DC-DC pre-regulation. |
| Max Output Current per H-Bridge | 3.8AMAX - impulsive current limit enforced by per-channel Overcurrent Protection (OCP), not continuous rating. |
| Full-Scale Current Setting | 2.8A - maximum programmable RMS-equivalent current via REF pin resistor; defines upper bound of DAC-driven current regulation. |
| RON (HS + LS) | 0.3Ω typical - enables high-efficiency drive at 2ARMS per phase with minimal conduction loss and thermal rise. |
| Microstep Resolution | 128 µsteps - built-in indexer controlled by STEP/DIR interface eliminates need for external motion controller microstepping logic. |
| Current Sense Accuracy | ±5% at ITRIP ≥ 1.1A - enables reliable closed-loop current monitoring for diagnostics and stall detection using ISENA/ISENB outputs. |
| Decay Mode Control | Slow, mixed, or adaptive - selected via DECAY[2:0] inputs; adaptive mode dynamically adjusts decay timing to maintain current stability across speed/load variations. |
Pinout & Package
MAX22204ATU+T is packaged in a 38-pin TSSOP (9.7mm × 4.4mm) with exposed pad. Pin functions are validated per Analog Devices' official TSSOP38 pin configuration and Pin Description table (Rev 1, May 2024).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A, OUT1B, OUT2A, OUT2B | H-Bridge Outputs | Four power terminals driving two independent stepper phases; each pair forms one full H-bridge with 65V rating and 3.8AMAX capability. |
| ISENA, ISENB | Current Monitor Outputs | Analog current-source outputs (KISEN = 7500 A/A); generate diagnostic voltage when external resistor connected to GND. |
| STEP, DIR, EN, SLEEP, TRQ, DECAY[2:0], MODE[2:0] | Digital Control Inputs | Logic-level interfaces for step sequencing, direction, enable/disable, sleep entry, torque switching, and decay/microstep mode selection. |
| REF, ROFF | Analog Programming Inputs | REF sets full-scale current (2.8A max) via resistor to GND; ROFF configures fixed OFF-time (16–24μs typical) via resistor to GND. |
| FAULT | Fault Indicator | Open-drain active-low output asserting during OCP, TSD, or UVLO; requires external pull-up for MCU interrupt signaling. |
| VM, VCP, CP1, CP2, PGND, GND, EP | Power & Ground | VM supplies high-side gate drivers and motor windings; charge-pump network (VCP/CP1/CP2) enables 65V N-channel MOSFET operation; multiple PGND/GND pins and EP ensure low-impedance thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Current Sensing (ICS) | Eliminates external power sense resistors - reduces BOM count, PCB area, and power loss while enabling accurate real-time current monitoring on ISENA/ISENB. |
| Dual-Torque Control (TRQ) | Switches full-scale current between two preset values (e.g., hold vs. move) in hardware - enables fast, deterministic torque transitions without software intervention. |
| 128-Microstep Indexer | On-chip sequencer accepts STEP/DIR commands and generates precise phase currents - removes need for external microstepping controller or FPGA logic. |
| Adaptive Decay Mode | Automatically adjusts decay timing based on winding current behavior - maintains stable current regulation across wide speed and load ranges without manual tuning. |
| Programmable Fixed OFF-Time | tOFF set from 16μs to 80μs via ROFF resistor - allows optimization of current ripple, efficiency, and acoustic noise for specific motor and supply conditions. |
Applications
| Industrial CNC Positioning Stage | Medical Infusion Pump Actuator |
|---|---|
Use Scenario: High-precision linear motion control in compact desktop CNC mills requiring sub-micron repeatability and low vibration. IC Role / Device Role / Timing Role: Dual-phase stepper driver executing 128-microstep indexing with adaptive decay to suppress resonance and audible noise during acceleration/deceleration. Use Value: Enables smooth, silent operation at low speeds and stable holding torque at standstill - critical for minimizing mechanical wear and patient disturbance. | Use Scenario: Precise syringe plunger advancement in portable infusion pumps where size, power efficiency, and fault resilience are paramount. IC Role / Device Role / Timing Role: Motor driver with integrated OCP, TSD, and UVLO protecting against overcurrent, overheating, and brownout - signaled via FAULT pin for system-level safety response. Use Value: Eliminates external current-sense resistors and discrete protection circuitry, reducing board area by >15% and improving long-term reliability in battery-operated medical devices. |
| Automated Retail Kiosk Dispenser | Lab Automation Robotic Arm Joint |
Use Scenario: Bidirectional product dispensing mechanism in unattended retail kiosks operating 24/7 under variable ambient temperatures. IC Role / Device Role / Timing Role: Stepper driver delivering 2ARMS per phase at +24V with thermal shutdown at 155°C and robust 65V VM tolerance for surge immunity. Use Value: Sustains rated performance across -40°C to +125°C ambient range without derating - ensures consistent dispensing accuracy despite enclosure heating or cold storage environments. | Use Scenario: Multi-axis robotic arm joint requiring coordinated microstepping, real-time current feedback, and rapid torque modulation for payload adaptation. IC Role / Device Role / Timing Role: Dual-channel driver with TRQ input enabling instantaneous switch between high-hold (2.8A) and low-move (1.4A) current profiles during trajectory execution. Use Value: Reduces joint heating during static positioning while maintaining dynamic responsiveness - extends motor life and improves positional accuracy over extended duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMC2209-LA | Lower voltage rating (46V), integrated UART interface, stealthChop2 quiet stepping - lacks ICS outputs and TRQ dual-torque pin. | Better suited for consumer-grade 3D printer axes; not rated for industrial 65V bus or diagnostic current monitoring. | Select MAX22204ATU+T when 65V operation, hardware torque switching, or ISEN-based diagnostics are required. |
| DRV8825PWPR | Fixed 32-microstep indexer, no adaptive decay, external sense resistors required, 45V max VM - higher BOM cost and thermal footprint. | Targeted at cost-sensitive, lower-voltage motion systems; lacks integrated current sensing and programmable tOFF. | Choose MAX22204ATU+T for space-constrained designs needing 128 µsteps, ICS, and 65V robustness without external sense resistors. |
Compared with TMC2209-LA and DRV8825PWPR, the MAX22204ATU+T uniquely combines 65V operation, hardware TRQ torque switching, non-dissipative ICS with diagnostic outputs, and adaptive decay - making it optimal for industrial motion systems demanding reliability, diagnostics, and wide supply range.
Availability
MAX22204ATU+T is available at Aetrix Electronics and suitable for industrial CNC positioning stages, medical infusion pump actuators, automated retail kiosk dispensers, and lab automation robotic arm joints requiring stable component supply, long lifecycle support, and RoHS-compliant packaging.
Supply support for MAX22204ATU+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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX22204ATU+T belongs to Analog Devices' precision motion control portfolio, designed specifically for industrial, medical, and automation systems requiring high-voltage stepper drivers with integrated diagnostics, thermal resilience, and microstepping intelligence.
FAQ
What is the maximum continuous current per phase the MAX22204ATU+T can deliver?
The MAX22204ATU+T delivers up to 2ARMS per phase at VM = +24V and TA = 25°C with adequate PCB thermal design (e.g., 4-layer board with ground plane). This is not a hard limit but depends on thermal dissipation - actual continuous current must be verified per application layout, heatsinking, and ambient temperature using θJA = 45°C/W (TSSOP). The 3.8AMAX rating is an impulsive OCP threshold, not a sustained current.
How does the TRQ pin function in the MAX22204ATU+T?
The TRQ pin on the MAX22204ATU+T is a logic input that selects between two full-scale current settings defined by the REF resistor. When TRQ = high, the device uses the full IFS value (e.g., 2.8A); when TRQ = low, it switches to a reduced setting (typically 50–70% of IFS). This enables hardware-level torque modulation - such as high-hold/low-move - without CPU intervention or reprogramming the current DAC.
Can the MAX22204ATU+T operate without external sense resistors?
Yes. The MAX22204ATU+T uses non-dissipative Integrated Current Sensing (ICS) to monitor bridge current internally. External sense resistors are eliminated entirely - saving PCB area, power loss, and BOM cost. Current replicas are provided on ISENA and ISENB pins (7500 A/A scaling), allowing diagnostic voltage generation with simple external resistors to GND.
What decay modes does the MAX22204ATU+T support and how are they selected?
The MAX22204ATU+T supports slow, mixed, and adaptive decay modes, selected via the three DECAY[2:0] logic inputs. Adaptive decay dynamically adjusts decay timing based on real-time current behavior to maintain regulation across speed and load changes. Unlike fixed-mode drivers, this eliminates manual tOFF tuning and improves torque consistency in varying mechanical loads.
Is the MAX22204ATU+T pin-compatible with other packages in the MAX22204 family?
No. The MAX22204ATU+T uses the TSSOP38 package (9.7mm × 4.4mm), while the MAX22204ATA+T uses TQFN38 (5mm × 7mm). Although both share identical electrical functionality and pin functions, their footprints, thermal pads, and mechanical dimensions differ - requiring separate PCB layouts. Neither is a drop-in replacement for the other without board redesign.
MAX22204ATU+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- Step/Direction
- Technology:
- NMOS
- Step Resolution:
- 1/32, 1/64, 1/128
- Applications:
- Stepper Motors
- Current - Output:
- 3.8A
- Voltage - Supply:
- 4.5V ~ 65V
- Voltage - Load:
- 4.5V ~ 65V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TQFN (5x7)
MAX22204ATU+T FAQ
1.How can I place an order for MAX22204ATU+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22204ATU+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 MAX22204ATU+T reliable?
The price and inventory of MAX22204ATU+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22204ATU+T is usually 5 days.
3.What payment methods are accepted for MAX22204ATU+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22204ATU+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22204ATU+T?
MAX22204ATU+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22204ATU+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 MAX22204ATU+T?
For technical support, including MAX22204ATU+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22204ATU+T requirements.
6.How does Aetrix verify that MAX22204ATU+T is sourced from the original manufacturer or authorized distributors?
All MAX22204ATU+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 MAX22204ATU+T meets industry standards.
7.What is the process for return or replacement of MAX22204ATU+T?
All MAX22204ATU+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX22204ATU+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 MAX22204ATU+T part is unused and in its original packaging.
Return procedure for MAX22204ATU+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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