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Analog Devices Inc./Maxim Integrated MAX22211AUI+T
- Part No.:
- MAX22211AUI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX22211AUI+T.pdf
- Description:
- MAX22211AUI+T
- Quantity:
- Payment:
- Shipping:
Inventory:4,883
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Product details
Overview
The MAX22211AUI+T from Analog Devices is a dual-channel 36V, 3.8A peak 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 compact industrial motion systems.
For engineers reviewing the MAX22211AUI+T datasheet, MAX22211AUI+T pinout, MAX22211AUI+T application, or MAX22211AUI+T equivalent, this device delivers verified current-regulated PWM control, real-time current monitoring via ISENA/ISENB analog outputs, fault-aware operation with open-drain FAULT signaling, and thermal-safe operation up to +125°C ambient - critical for servo actuators, automated valves, and precision lab equipment.
Technical Context
The MAX22211AUI+T implements two independent full-bridge drivers, each controlled by three logic inputs (DIN1, DIN2, EN) and configurable decay mode (DECAY1/DECAY2). Its internal charge-pump (VCP, CP1, CP2) enables high-side gate drive across the full 4.5V–36V VM range without external boost circuitry.
Current regulation uses a non-dissipative integrated current sensor (ICS) referenced to user-set thresholds (ITRIP) via REFA/REFB resistors, with fixed tOFF = 16–24μs and programmable HFS scaling (50% or 100% full-scale). Fault protection includes per-channel OCP (3.8A trip), UVLO (VM rising threshold 4.0V), and TSD at +165°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Operating Voltage (VM) | +36V - supports 24V industrial rails and 36V battery-powered mobile platforms without level-shifting |
| Peak Output Current | 3.8A - maximum configurable current regulation threshold (ITRIPMAX) limited by OCP |
| Total RON (HS + LS) | 0.25Ω typical - enables >90% efficiency at 2A RMS per bridge on 4-layer PCBs |
| RMS Current Rating | 2A per H-bridge - recommended max continuous load under thermal constraints (θJA = 29°C/W) |
| Current Sense Bandwidth | 400kHz - supports closed-loop torque control with fast-response ADC sampling |
| Sleep Mode Current | 4–11μA - ultra-low quiescent draw during system standby, reducing idle power in battery systems |
| Fault Response | Open-drain active-low FAULT - asserts within <1μs of OCP/UVLO/TSD event, enabling immediate controller intervention |
Pinout & Package
The MAX22211AUI+T is packaged in a 32-pin TQFN (5mm × 5mm, exposed pad), optimized for thermal dissipation and space-constrained motor control modules. Pin mapping is validated per Analog Devices' official TQFN pin configuration diagram (Outline 21-0140, Land Pattern 90-0013).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A, OUT2A | H-Bridge A Outputs | Drive terminals for first brushed DC motor or stepper phase A; rated for 36V, 3.8A peak |
| OUT1B, OUT2B | H-Bridge B Outputs | Drive terminals for second brushed DC motor or stepper phase B; electrically isolated from Bridge A |
| REFA, REFB | Current Threshold Inputs | Analog inputs setting ITRIP independently per bridge via resistor-to-GND (12kΩ–72kΩ range) |
| ISENA, ISENB | Current Mirror Outputs | Proportional current sources (KISEN = 7500 A/A or 3840 A/A) for external RISEN-to-ADC conversion |
| CDRA, CDRB | CDR Activity Indicators | Open-drain signals asserted during current regulation decay cycles - enable real-time loop monitoring |
| FAULT | Fault Status Output | Active-low open-drain flag indicating OCP, UVLO, or TSD - requires external pull-up to MCU supply |
| SLEEP | Low-Power Control Input | Active-low logic input disabling all drivers, charge pump, and internal bias; wake-up time ≤3ms |
| VCP, CP1, CP2 | Charge-Pump Network | Internal high-voltage generator for N-channel high-side FET drive; requires 1μF (VCP–VM) and 22nF (CP1–CP2) |
Key Features
| Feature | Design Value |
|---|---|
| Non-dissipative current sensing (ICS) | Eliminates external shunt resistors - saves >15mm² board area and removes 1–2W heat source per bridge |
| Four selectable decay modes | Slow, Fast, and two Mixed decays - enable optimal current ripple and torque linearity tuning per motor type and speed |
| HFS pin for dual full-scale ranges | Switches KISEN between 7500 A/A (full scale) and 3840 A/A (half scale) - improves low-current measurement accuracy below 1A |
| Integrated 1.8V LDO (VDD) | Supplies logic interface and internal circuitry from VM rail - eliminates need for external 1.8V regulator |
| Per-channel overcurrent protection | OCP triggers at 3.8A with 1–3.2μs blanking - prevents false trips during PWM turn-on transients |
| Thermal shutdown with hysteresis | TSD activates at +165°C; recovery begins only after die cools to +145°C - prevents thermal cycling instability |
Applications
| Industrial Valve Actuation | Lab Automation Stage Control |
|---|---|
Use Scenario: Precise bidirectional positioning of latched solenoid valves in fluidic analyzers and chromatography systems. IC Role / Device Role / Timing Role: Dual H-bridge driver delivering regulated 2A RMS current per valve coil with microsecond-level decay control for repeatable step response. Use Value: Enables <10ms valve settling time and <±0.5% current accuracy via ISENA feedback - critical for volumetric dosing repeatability. |
Use Scenario: Closed-loop microstepping of bipolar stepper motors in robotic sample handlers and optical alignment stages. IC Role / Device Role / Timing Role: Single-chip dual-bridge solution driving both phases with synchronized CDR and decay-mode selection per half-step. Use Value: Delivers 0.9° step resolution with <2% phase current matching (via REFA/REFB trimming) and real-time torque monitoring via ISENB. |
| Automated Test Equipment (ATE) | Portable Medical Pump Drive |
Use Scenario: High-reliability DC motor actuation in semiconductor handler end-effectors requiring stall-tolerant current limiting. IC Role / Device Role / Timing Role: Brushed DC motor driver with auto-retry OCP (3ms interval) and FAULT pin integration into host safety watchdog. Use Value: Sustains 3.8A peak during motor startup while limiting RMS to 2A - prevents coil overheating during extended test sequences. |
Use Scenario: Battery-powered infusion pump with silent, low-EMI motor control and torque-based occlusion detection. IC Role / Device Role / Timing Role: Low-quiescent (4μA sleep) dual H-bridge enabling 72-hour standby; ISENA monitors load current for pressure anomaly detection. Use Value: Achieves <±3% current-sense accuracy down to 100mA (HFS = high) - enables early occlusion alert before patient risk. |
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 |
|---|---|---|---|
| DRV8876PWPR | Single 36V, 3.7A H-bridge; no integrated current sense mirror or CDR monitor outputs (CDRA/CDRB) | Requires external current sense amplifiers and discrete decay control logic | Choose when cost sensitivity outweighs diagnostic capability and board space is not constrained |
| STSPIN32F0A | Integrated 32-bit ARM Cortex-M0 MCU + dual 3.5A H-bridges; lacks non-dissipative ICS and fixed tOFF CDR architecture | Offers embedded motion control but higher BOM complexity and firmware dependency | Prefer when closed-loop field-oriented control (FOC) is required and MCU resources are available |
Compared with DRV8876PWPR and STSPIN32F0A, the MAX22211AUI+T uniquely combines verified 3.8A peak current regulation, dual analog current mirrors (ISENA/ISENB), and hardware-decoded decay modes - delivering plug-and-play torque control without external signal conditioning or firmware overhead.
Availability
The MAX22211AUI+T is available at Aetrix Electronics and suitable for industrial valve actuation, lab automation stage control, automated test equipment (ATE), and portable medical pump drive requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX22211AUI+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 MAX22211AUI+T belongs to Analog Devices' precision motor driver product line, engineered specifically for high-reliability, current-regulated motion control in space- and thermally-constrained industrial and medical systems.
FAQ
What is the maximum continuous current the MAX22211AUI+T can deliver per H-bridge?
The MAX22211AUI+T supports a recommended maximum RMS current of 2A per H-bridge on standard four-layer PCBs, based on thermal resistance (θJA = 29°C/W) and junction temperature limits. While peak current regulation is settable up to 3.8A via REFA/REFB, sustained operation above 2A RMS requires enhanced thermal management such as heatsinking or forced airflow to maintain TJ ≤ +125°C.
How does the HFS pin affect current sensing accuracy in the MAX22211AUI+T?
The HFS pin on the MAX22211AUI+T selects between two current scaling factors: KISEN = 7500 A/A (HFS = low) for full-scale operation up to 3A, or KISEN = 3840 A/A (HFS = high) for improved low-current accuracy down to 0.25A. This dual-range capability ensures ±0.4% current-monitor accuracy in the 0.35A–1.5A range - essential for torque-sensitive applications like medical pumps.
Can the MAX22211AUI+T drive a unipolar stepper motor?
No - the MAX22211AUI+T is designed exclusively for bipolar stepper motors or dual brushed DC motors. Its dual full-bridge topology provides complementary high-side/low-side drive per phase, which is incompatible with the center-tapped winding configuration of unipolar steppers. For unipolar applications, a dedicated unipolar driver or discrete transistor array is required.
What external components are mandatory for stable operation of the MAX22211AUI+T?
Four external components are mandatory: (1) a 1μF ceramic capacitor between VM and AGND/PGND, (2) a 10μF bulk electrolytic capacitor on VM, (3) a 1μF capacitor between VCP and VM, and (4) a 22nF capacitor between CP1 and CP2. Additionally, REFA/REFB resistors (12kΩ–72kΩ) are required to set ITRIP, and RISEN resistors are needed to convert ISENA/ISENB current outputs to measurable voltages for ADC interfacing.
Does the MAX22211AUI+T support PWM frequencies above 100kHz?
Yes - the MAX22211AUI+T supports PWM input frequencies up to 500kHz, enabled by its 200V/μs output slew rate and sub-microsecond enable/disable timing (tEN = 0.4μs, tDIS = 0.6μs). However, effective current regulation bandwidth is limited by the 400kHz current-sense small-signal bandwidth and fixed 16–24μs tOFF, making 20–100kHz the optimal range for stable CDR operation in most motor loads.
MAX22211AUI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) 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 (2)
- 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:
- 28-TSSOP-EP
MAX22211AUI+T FAQ
1.How can I place an order for MAX22211AUI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22211AUI+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 MAX22211AUI+T reliable?
The price and inventory of MAX22211AUI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22211AUI+T is usually 5 days.
3.What payment methods are accepted for MAX22211AUI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22211AUI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22211AUI+T?
MAX22211AUI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22211AUI+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 MAX22211AUI+T?
For technical support, including MAX22211AUI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22211AUI+T requirements.
6.How does Aetrix verify that MAX22211AUI+T is sourced from the original manufacturer or authorized distributors?
All MAX22211AUI+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 MAX22211AUI+T meets industry standards.
7.What is the process for return or replacement of MAX22211AUI+T?
All MAX22211AUI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX22211AUI+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 MAX22211AUI+T part is unused and in its original packaging.
Return procedure for MAX22211AUI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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