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Texas Instruments ISO7220AQDRQ1
- Part No.:
- ISO7220AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO7220AQDRQ1.pdf
- Description:
- DGTL ISO 2500VRMS 2CH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
ISO7220AQDRQ1 from Texas Instruments is a dual-channel, A-option automotive-grade digital isolator with silicon-dioxide isolation barrier, 1 Mbps signaling rate, <1 ns channel-to-channel output skew, and 4 kV ESD protection. It operates across –40°C to +125°C and supports 2.8 V, 3.3 V, or 5 V supplies on both input and output sides - used in factory automation interfaces such as Modbus and Profibus where galvanic isolation prevents ground-loop noise in industrial PLCs.
For engineers reviewing the ISO7220AQDRQ1 datasheet, ISO7220AQDRQ1 pinout, ISO7220AQDRQ1 application, or ISO7220AQDRQ1 equivalent, key selection criteria include its 1 Mbps data rate, failsafe high output behavior on input power loss, TTL-compatible input thresholds with noise filtering, and SOIC-8 package with split supply domains (VCCI/GNDI and VCCO/GNDO).
Technical Context
The ISO7220AQDRQ1 implements a differential capacitive isolation architecture using TI's SiO₂ barrier, with input-side signal conditioning, balanced transmission, and output-side differential comparison followed by flip-flop latching. Its failsafe circuitry monitors dc-refresh pulses every 4 μs and drives outputs high if refresh is missed - ensuring deterministic state during input-side power loss.
It features separate input and output supply domains (VCCI/VCCO), enabling level-shifting between 2.8 V/3.3 V and 5 V logic. Input channels have TTL thresholds and integrated noise filtering; output drivers deliver 4 mA CMOS drive strength with <0.4 V VOL at 4 mA and >VCC–0.4 V VOH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 1 Mbps - supports reliable serial communication in Modbus RTU and Profibus DP at standard baud rates without timing violation. |
| Channel-to-Channel Output Skew | ≤15 ns - ensures synchronized dual-channel output timing critical for encoder quadrature decoding or dual-signal integrity. |
| Pulse-Width Distortion | ≤22 ns - preserves duty cycle fidelity for PWM-based control signals in servo interfaces. |
| Common-Mode Transient Immunity | ≥15 kV/μs - maintains signal integrity in noisy motor-drive environments with fast switching transients. |
| Failsafe Output Behavior | Drives high on input power loss - prevents undefined states in safety-critical I/O modules during controller reset or brownout. |
| Isolation Voltage Rating | 4000 VPK per VDE 0884-17 - meets reinforced insulation requirements for functional safety in automotive and industrial systems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and factory-floor deployment without derating. |
Pinout & Package
ISO7220AQDRQ1 is housed in an 8-pin SOIC (D package) with 4.90 mm × 3.91 mm body size and 4.9 mm × 6 mm overall footprint. The package supports surface-mount assembly and provides creepage/clearance ≥4 mm per safety standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA | Input, Channel A | TTL-compatible digital input with hysteresis (150 mV); accepts 0–5 V signals regardless of VCCI supply voltage. |
| INB | Input, Channel B | Independent TTL input with same noise-filtering and threshold behavior as INA. |
| VCC1 | Input-Side Power Supply | Supplies input logic and isolation transmitter; supports 2.8 V (C-grade), 3.3 V, or 5 V operation. |
| VCC2 | Output-Side Power Supply | Supplies output buffer and receiver; independent of VCC1 - enables bidirectional level shifting. |
| OUTA | Output, Channel A | CMOS output with 4 mA drive strength; VOH ≥ VCC2–0.4 V, VOL ≤ 0.4 V at 4 mA load. |
| OUTB | Output, Channel B | Independent CMOS output matching OUTA electrical specs and timing behavior. |
| GND1 | Input-Side Ground | Reference for VCC1 and input signals; galvanically isolated from GNDO. |
| GND2 | Output-Side Ground | Reference for VCC2 and output signals; forms isolated domain with GND1 across SiO₂ barrier. |
Key Features
| Feature | Design Value |
|---|---|
| TTL input thresholds with noise filter | Prevents false triggering from sub-40 ns transients - essential for robust operation near motor drives or relay coils. |
| Failsafe high output on input power loss | Ensures safe default state (logic high) when controller resets or loses power - reduces need for external supervision circuitry. |
| Dual independent supply domains | Enables 3.3 V microcontroller to interface with 5 V fieldbus transceivers without level-shifters or additional ICs. |
| 28-year lifetime at rated voltage | Validated reliability for long-lifecycle automotive and industrial applications - no periodic replacement required in sealed enclosures. |
| VDE 0884-17, UL 1577, IEC 62368-1 certified | Meets reinforced insulation requirements for ASIL-B systems and functional safety subsystems without additional certification effort. |
Applications
| Factory Automation Interface | Servo Control Interface |
|---|---|
Use Scenario: Isolating Modbus RTU or Profibus DP signals between PLC CPU and remote I/O modules in harsh factory environments with high EMI. IC Role / Device Role / Timing Role: Dual-channel digital isolator providing galvanic separation between controller and fieldbus physical layer, preserving signal integrity at up to 1 Mbps. Use Value: Eliminates ground loops and common-mode noise coupling while maintaining timing accuracy (<15 ns skew) for deterministic cyclic communication. | Use Scenario: Isolating direction and enable signals between motion controller and servo amplifier in CNC machines or robotic arms. IC Role / Device Role / Timing Role: Level-shifting and fault-isolating interface between low-voltage MCU outputs and high-noise motor driver inputs. Use Value: Prevents latch-up or damage from motor-phase transients (≥15 kV/μs CMTI) and ensures failsafe high on controller reset to halt motion safely. |
| Data Acquisition System | Computer Peripheral Interface |
Use Scenario: Isolating analog front-end digital control lines (e.g., ADC SPI clock, CS, DRDY) from host processor in high-precision measurement equipment. IC Role / Device Role / Timing Role: Timing-critical isolator for synchronous serial interfaces requiring low PWD (<22 ns) and matched propagation delay across channels. Use Value: Maintains sample synchronization and eliminates timing jitter-induced measurement error in multi-channel DAQ systems. | Use Scenario: Isolating USB-to-serial bridge control signals (e.g., RTS/CTS) or printer port handshaking lines in medical or lab peripherals. IC Role / Device Role / Timing Role: General-purpose isolation for low-speed bidirectional digital control paths with ESD immunity (4 kV HBM). Use Value: Protects host system from electrostatic discharge events and prevents bus lockup due to ground potential differences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7220CDRQ1 | 25 Mbps signaling rate; CMOS VCC/2 input thresholds; no input noise filter; lower propagation delay (21–48 ns). | Better suited for high-speed CAN FD or Ethernet PHY control interfaces; less tolerant of fast transients than ISO7220AQDRQ1. | Select ISO7220CDRQ1 only when >1 Mbps data throughput is required and noise environment is controlled. |
| ADUM1200ARZ-RL7 | 2.5 kV RMS isolation rating; 100 Mbps max rate; single 3.3 V supply; no failsafe high behavior on input loss. | Limited to non-safety-critical consumer or test equipment; lacks automotive qualification and reinforced insulation. | Use ADUM1200ARZ-RL7 only in cost-sensitive, non-automotive designs where 4000 VPK isolation and failsafe are not mandated. |
Compared with ISO7220CDRQ1 and ADUM1200ARZ-RL7, ISO7220AQDRQ1 uniquely balances automotive qualification, failsafe behavior, TTL noise immunity, and 4000 VPK reinforced isolation - making it the only option among the three qualified for ASIL-B functional safety subsystems in factory automation.
Availability
ISO7220AQDRQ1 is available at Aetrix Electronics and suitable for factory automation, servo control, and data acquisition applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for ISO7220AQDRQ1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in high-reliability components.
The ISO722x-Q1 family was designed specifically for automotive and industrial systems requiring reinforced galvanic isolation, fail-safe operation, and compliance with VDE 0884-17 and UL 1577 - targeting ECU, battery management, and programmable logic controller applications.
FAQ
What is the maximum signaling rate supported by ISO7220AQDRQ1?
The ISO7220AQDRQ1 supports a maximum signaling rate of 1 Mbps. This is specified in the device's A-option variant and validated across all recommended operating conditions including –40°C to +125°C ambient temperature and supply voltages of 2.8 V, 3.3 V, or 5 V. The 1 Mbps limit ensures low pulse-width distortion (<22 ns) and stable operation in Modbus RTU and Profibus DP implementations. Higher-rate variants like ISO7220CDRQ1 are available but differ in input threshold and noise-filtering architecture.
Does ISO7220AQDRQ1 provide failsafe behavior, and how does it work?
Yes, ISO7220AQDRQ1 implements a hardware-based failsafe that drives both outputs high when input-side power is lost or the input signal becomes inactive. This occurs because the device sends a dc-refresh pulse across the isolation barrier every 4 μs; if this pulse is not received, the timeout logic asserts the failsafe state. This behavior is intrinsic to the ISO7220AQDRQ1 design and requires no external components - ensuring predictable shutdown in automotive ECUs or industrial controllers during brownout or reset conditions.
Can ISO7220AQDRQ1 operate with mixed supply voltages, such as 3.3 V on the input side and 5 V on the output side?
Yes, ISO7220AQDRQ1 supports independent supply domains: VCCI (input side) and VCCO (output side) may be powered from different voltages - including 2.8 V, 3.3 V, or 5 V combinations. For example, a 3.3 V microcontroller can drive INA/INB while VCCO is supplied with 5 V to interface with legacy 5 V fieldbus transceivers. All inputs remain 5 V tolerant regardless of VCCI voltage, and outputs deliver full CMOS levels referenced to VCCO - enabling seamless level translation without external buffers.
What safety certifications does ISO7220AQDRQ1 hold, and what do they cover?
ISO7220AQDRQ1 is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced isolation, UL 1577 Component Recognition (2500 VRMS withstand), and IEC 62368-1 for end-equipment safety. These certifications validate its 4000 VPK isolation barrier, 4 mm creepage/clearance, and performance under transient stress - confirming suitability for ASIL-B automotive systems and industrial equipment requiring functional safety compliance without additional system-level testing.
How does the input noise filter in ISO7220AQDRQ1 improve system robustness?
The ISO7220AQDRQ1 includes a built-in input noise filter that rejects transients shorter than 40 ns - effectively suppressing EMI from nearby relays, solenoids, or motor commutation. This filter works in conjunction with TTL input thresholds and 150 mV hysteresis to prevent false edge detection. Unlike the C-option variant (ISO7220CDRQ1), which omits this filter for speed, the A-option's noise rejection makes ISO7220AQDRQ1 ideal for electrically noisy factory floors where signal integrity must be guaranteed without external RC filtering.
ISO7220AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 480ns, 480ns
- Pulse Width Distortion (Max):
- 14ns
- Rise / Fall Time (Typ):
- 1ns, 1ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO7220AQDRQ1 FAQ
1.How can I place an order for ISO7220AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7220AQDRQ1 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 ISO7220AQDRQ1 reliable?
The price and inventory of ISO7220AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7220AQDRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7220AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7220AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7220AQDRQ1?
ISO7220AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7220AQDRQ1 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 ISO7220AQDRQ1?
For technical support, including ISO7220AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7220AQDRQ1 requirements.
6.How does Aetrix verify that ISO7220AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7220AQDRQ1 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 ISO7220AQDRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7220AQDRQ1?
All ISO7220AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7220AQDRQ1, 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 ISO7220AQDRQ1 part is unused and in its original packaging.
Return procedure for ISO7220AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7220AQDRQ1 Tags
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