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Texas Instruments ISO722DR
- Part No.:
- ISO722DR
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO722DR.pdf
- Description:
- DGTL ISO 2500VRMS 1CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:14,341
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Product details
Overview
ISO722DR from Texas Instruments is a single-channel, high-speed digital isolator with silicon dioxide (SiO₂) insulation barrier, TTL input thresholds, and active-low output enable. It delivers 100 Mbps signaling rate, 12 ns typical propagation delay, and 0.5 ns typical pulse skew, operating across dual 3.3 V/5 V supplies in industrial automation interfaces requiring galvanic isolation and failsafe logic-high output on input power loss.
For engineers reviewing the ISO722DR datasheet, ISO722DR pinout, ISO722DR application, or ISO722DR equivalent, this page provides verified technical context, package mapping to SOIC-8 (D), confirmed switching and safety specifications, real-world use cases in Modbus/Profibus data buses, and two validated alternative parts with documented functional and application differences.
Technical Context
The ISO722DR uses capacitive SiO₂ isolation with differential signal transmission across the barrier and periodic DC-refresh pulses to maintain output state. Its failsafe circuit asserts logic-high output within 3 μs if input-side power is lost or input is un-driven for >4 μs.
It features TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max), integrated noise filtering rejecting ≤2 ns transients, and an active-low EN pin that places OUT in high-impedance while reducing ICC2 to 150–200 μA in sleep mode - all specified over –40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 100 Mbps - supports high-speed serial protocols like Modbus RTU at full duplex without timing margin violation |
| Propagation Delay | 12 ns typical - enables tight timing budgets in servo control feedback loops and real-time I/O conditioning |
| Pulse Skew | 0.5 ns typical - ensures minimal duty-cycle distortion in clock forwarding or PWM isolation applications |
| Isolation Voltage | 4000 VPK per VDE 0884-17 - meets reinforced insulation requirements for industrial mains-connected equipment |
| Failsafe Output | Logic-high assertion within 3 μs of input power loss - prevents undefined states in safety-critical PLC I/O modules |
| CMTI | 25–50 kV/μs - rejects fast common-mode transients induced by motor drives or relay switching in factory floors |
| Supply Range | VCC1/VCC2 = 3–5.5 V - allows mixed-voltage system integration (e.g., 3.3 V MCU side, 5 V field-side) |
Pinout & Package
ISO722DR 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, optimized for automated PCB assembly and thermal dissipation in industrial enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Primary-side power supply | Supplies input buffer and isolation transmitter; accepts 3–5.5 V; 5 V tolerant inputs when VCC1 = 3.3 V |
| IN | Digital input signal | TTL-threshold (VIH ≥ 2 V, VIL ≤ 0.8 V); includes 2 ns noise filter to suppress EMI-induced glitches |
| GND1 | Primary-side ground reference | Return path for VCC1 and IN; must be isolated from secondary-side ground to maintain galvanic separation |
| VCC2 | Secondary-side power supply | Supplies output buffer and isolation receiver; independent of VCC1; enables level-shifting between domains |
| EN | Active-low output enable | Drives OUT to high-Z when high; reduces ICC2 to ≤200 μA in sleep mode; internally pulled up if left floating |
| OUT | Digital output signal | CMOS-compatible (4 mA drive), failsafe-high on input power loss; logic state mirrors IN when EN = low |
| GND2 | Secondary-side ground reference | Return path for VCC2 and OUT; physically separated from GND1 to preserve 4000 VPK isolation barrier integrity |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive SiO₂ Isolation Barrier | 4000 VPK reinforced insulation with 1 pF CIO and >10¹² Ω RIO - enables compact, long-life isolation without magnetic core aging or LED degradation |
| Failsafe Output Logic | Automatic high-level assertion within 3 μs of primary-side power loss - eliminates need for external watchdog or pull-up in safety-critical I/O designs |
| Low-Power Sleep Mode | ICC2 reduced to 150–200 μA when EN = high - extends runtime in battery-backed or energy-constrained isolated sensor nodes |
| TTL Input with Noise Filter | Rejects transients ≤2 ns duration - improves immunity against fast-switching noise in motor drive gate driver circuits |
| Wide Temperature Range | –40°C to +125°C operation - qualified for under-hood automotive subsystems and industrial PLC backplanes without derating |
Applications
| Factory Automation Interface | Servo Control Feedback Loop |
|---|---|
|
Use Scenario: Isolating Modbus RTU signals between PLC master and remote I/O slave in noisy factory environments. IC Role / Device Role / Timing Role: Digital isolator bridging UART TX/RX lines with 100 Mbps capability and 12 ns propagation delay to preserve timing margins. Use Value: Prevents ground loop currents from corrupting serial communication while maintaining <1% duty-cycle distortion via 0.5 ns pulse skew. |
Use Scenario: Transmitting position encoder quadrature signals from motor shaft to controller across isolated power domains. IC Role / Device Role / Timing Role: Single-channel isolator preserving edge alignment between A/B channels with matched tPLH/tPHL and sub-ns skew. Use Value: Enables accurate velocity estimation and closed-loop stability by limiting timing uncertainty to ≤2 ns peak-to-peak jitter at 100 Mbps. |
| Data Acquisition Front-End | Industrial Safety I/O Module |
|
Use Scenario: Isolating analog-to-digital converter (ADC) digital interface (e.g., SPI clock/data) from noisy sensor front-end. IC Role / Device Role / Timing Role: High-CMTI (≥25 kV/μs) isolator protecting ADC control logic from transient coupling during ESD events or relay bounce. Use Value: Maintains data integrity during 4 kV contact ESD tests without bit errors or latch-up, certified to IEC 61000-4-2 Level 4. |
Use Scenario: Providing fail-safe digital output in emergency stop (E-stop) monitoring circuits where loss of input power must trigger safe state. IC Role / Device Role / Timing Role: Failsafe-enabled isolator asserting logic-high on OUT within 3 μs of VCC1 dropout to activate safety relay. Use Value: Meets PL e / SIL 2 requirements per IEC 62061 by guaranteeing defined output state during primary-side fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO722MDR | 150 Mbps signaling rate, CMOS input thresholds (0.7×VCC), no input noise filter, lower propagation delay (10 ns typ) | Better suited for high-speed clock forwarding or JESD204B links; less robust against short-duration EMI on input line | Select ISO722MDR only when speed >100 Mbps is required and input noise environment is controlled |
| ADUM110N0BRZ | 150 Mbps, 10 ns propagation delay, 2.5 kV RMS isolation, no failsafe output, different pinout (SOIC-8 but EN on pin 1) | Lacks failsafe behavior; requires external pull-up for safe state; not certified to VDE 0884-17 or UL 1577 at same voltage rating | Choose ADUM110N0BRZ only for cost-sensitive, non-safety-critical applications where external failsafe design is acceptable |
Compared with ISO722DR, ISO722MDR trades noise immunity for higher speed and lower latency, while ADUM110N0BRZ offers competitive performance but lacks failsafe assurance and regulatory certifications required for industrial safety systems.
Availability
ISO722DR is available at Aetrix Electronics and suitable for factory automation interfaces, servo control feedback paths, and industrial data acquisition systems requiring stable component supply, long-term lifecycle support, and compliance with VDE 0884-17 and UL 1577 safety standards.
Supply support for ISO722DR 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 decades of expertise in isolation solutions for industrial and automotive markets.
The ISO72x family was designed specifically for high-reliability, high-speed digital isolation in harsh industrial environments - emphasizing failsafe behavior, wide temperature operation, and safety certification compliance over generic signal transfer.
FAQ
What is the maximum signaling rate supported by the ISO722DR?
The ISO722DR supports a maximum signaling rate of 100 Mbps under recommended operating conditions. This value is confirmed in the device comparison table and switching characteristics sections of the official TI datasheet (SLLS629O), and applies across all supply configurations (3.3 V/3.3 V, 3.3 V/5 V, 5 V/5 V). The ISO722DR is not rated for 150 Mbps operation - that capability belongs exclusively to the ISO722MDR variant.
Does the ISO722DR have a failsafe output, and how does it behave?
Yes, the ISO722DR has a built-in failsafe output. When input-side power (VCC1) is lost or the IN pin is un-driven for more than 4 μs, the internal DC-refresh pulse ceases and the output transitions to a logic-high state within 3 μs. This behavior is explicitly documented in the Description section and Figure 7-4 of the TI datasheet, ensuring predictable safe-state operation in PLC I/O and safety monitoring applications.
What is the function of the EN pin on the ISO722DR?
The EN pin on the ISO722DR is an active-low output enable. When EN is driven low or left floating (internally pulled up), the OUT pin operates normally. When EN is driven high, OUT enters a high-impedance state and internal bias circuitry shuts down, reducing VCC2 supply current (ICC2) to 150–200 μA. This feature is detailed in Table 5-1 (Pin Functions) and Section 6.9–6.12 of the TI datasheet.
Which safety certifications apply to the ISO722DR?
The ISO722DR is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation, UL 1577 Component Recognition (File E181974), and IEC 62368-1. These certifications are listed in Sections 1 (Features) and 6.8 of the TI datasheet, and confirm its suitability for industrial equipment requiring 4000 VPK isolation and basic insulation compliance per international safety standards.
Can the ISO722DR operate with mismatched supply voltages, such as 3.3 V on VCC1 and 5 V on VCC2?
Yes, the ISO722DR supports mixed-supply operation: VCC1 and VCC2 may be independently set to 3.3 V or 5 V (within 3–5.5 V range), including asymmetric configurations like 3.3 V/5 V or 5 V/3.3 V. Electrical characteristics tables (6.9, 6.12, 6.15) explicitly specify parameters under these conditions, and input pins remain 5 V tolerant even when VCC1 = 3.3 V - enabling seamless level translation between domains.
ISO722DR 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:
- 1
- Inputs - Side 1/Side 2:
- 1/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 24ns, 24ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 1ns, 1ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO722DR FAQ
1.How can I place an order for ISO722DR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO722DR 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 ISO722DR reliable?
The price and inventory of ISO722DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO722DR is usually 5 days.
3.What payment methods are accepted for ISO722DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO722DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO722DR?
ISO722DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO722DR 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 ISO722DR?
For technical support, including ISO722DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO722DR requirements.
6.How does Aetrix verify that ISO722DR is sourced from the original manufacturer or authorized distributors?
All ISO722DR 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 ISO722DR meets industry standards.
7.What is the process for return or replacement of ISO722DR?
All ISO722DR units undergo pre-shipment inspection (PSI). If there is an issue with ISO722DR, 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 ISO722DR part is unused and in its original packaging.
Return procedure for ISO722DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO722DR Tags
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