My Inquiry
My Account
Texas Instruments ISO722DRG4
- Part No.:
- ISO722DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO722DRG4.pdf
- Description:
- DGTL ISO 2500VRMS 1CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,454
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISO722DRG4 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 failsafe high-level output on input power loss-used in industrial fieldbus interfaces requiring galvanic isolation up to 4000 VPK.
For engineers reviewing the ISO722DRG4 datasheet, ISO722DRG4 pinout, ISO722DRG4 application, or ISO722DRG4 equivalent, key selection criteria include its 8-pin SOIC package, dual-supply operation (3.3 V/5 V), low-power sleep mode, and compliance with VDE 0884-17, UL 1577, and IEC 62368-1 safety standards.
Technical Context
The ISO722DRG4 employs capacitive isolation with differential signal transmission across a SiO₂ barrier, using periodic dc-refresh pulses to maintain output state. Its failsafe circuit asserts logic-high output within 3 μs if input power is lost or un-driven for >4 μs.
It features TTL-compatible input thresholds with integrated noise filtering (rejects ≤2 ns transients), 0.5 ns typical pulse skew, and 25–50 kV/μs common-mode transient immunity-enabling robust operation in noisy factory automation environments with Modbus or Profibus data buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 100 Mbps - supports high-speed serial communication in real-time industrial control loops |
| Propagation Delay | 12 ns typical - enables tight timing budgets in servo drive feedback paths |
| Pulse Skew | 0.5 ns typical - preserves signal integrity in clock/data recovery applications |
| Isolation Voltage | 4000 VPK per VDE 0884-17 - meets reinforced insulation requirements for 250 VRMS working voltage systems |
| Supply Range | 3.3 V or 5 V on both sides - allows flexible interface with mixed-voltage microcontrollers and FPGAs |
| Output Enable | Active-low EN pin - enables tri-state output for bus sharing and power conservation in multi-device systems |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial motor drive environments |
Pinout & Package
ISO722DRG4 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 isolation barrier separates primary (VCC1/GND1/IN) and secondary (VCC2/GND2/OUT/EN) sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Primary-side power supply | Accepts 3.3 V or 5 V; powers input buffer and isolation transmitter |
| IN | Digital input | TTL-threshold (0.8 V/2.0 V), noise-filtered; 5 V tolerant when VCC1 = 3.3 V |
| GND1 | Primary-side ground | Reference for VCC1 and IN; must be isolated from GND2 |
| VCC2 | Secondary-side power supply | Accepts 3.3 V or 5 V; powers output buffer and isolation receiver |
| GND2 | Secondary-side ground | Reference for VCC2, OUT, and EN; galvanically isolated from GND1 |
| EN | Active-low output enable | Drives OUT to high-impedance when high; disables internal bias to reduce ICC2 to 150–200 μA in sleep mode |
| OUT | Digital output | CMOS-compatible (4 mA drive), failsafe-high on input power loss |
Key Features
| Feature | Design Value |
|---|---|
| Failsafe output | Asserts logic-high at OUT within 3 μs if IN is unpowered or undriven >4 μs - prevents undefined states in safety-critical PLC I/O modules |
| Noise-filtered TTL input | Rejects transients ≤2 ns duration - eliminates false triggering from EFT bursts in industrial motor drives |
| Low-power sleep mode | Reduces VCC2 supply current to 150–200 μA when EN = high - extends battery life in portable test equipment |
| High CMTI | 25–50 kV/μs common-mode transient immunity - maintains signal integrity during IGBT switching noise in inverters |
| Safety certifications | VDE 0884-17 (reinforced), UL 1577, IEC 62368-1 - enables use in certified industrial safety subsystems without additional barrier validation |
Applications
| Factory Automation Interface | Computer Peripheral Isolation |
|---|---|
Use Scenario: Isolating RS-485 transceivers in Modbus RTU networks connecting PLCs and remote I/O modules. IC Role / Device Role / Timing Role: Digital isolator bridging controller UART and isolated bus transceiver, preserving signal timing with <12 ns delay. Use Value: Prevents ground-loop currents from corrupting 100 Mbps serial data while meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Isolating USB-to-serial bridge ICs in medical diagnostic equipment to meet patient-connected safety limits. IC Role / Device Role / Timing Role: Signal-level isolator between host MCU and isolated UART, enabling safe 3.3 V ↔ 5 V level translation. Use Value: Provides 4000 VPK reinforced isolation without adding propagation delay that would break USB CDC timing margins. |
| Servo Control Feedback Path | Data Acquisition Front-End |
Use Scenario: Isolating encoder quadrature signals and PWM gate-drive return paths in closed-loop servo amplifiers. IC Role / Device Role / Timing Role: High-speed bidirectional-capable isolator (via paired ISO722DRG4) for position feedback and fault reporting. Use Value: 0.5 ns pulse skew ensures phase accuracy of A/B/Z encoder edges, critical for sub-micron positioning resolution. |
Use Scenario: Isolating analog-to-digital converter (ADC) digital interface lines in high-voltage power quality analyzers. IC Role / Device Role / Timing Role: SPI bus isolator separating microcontroller SPI master from isolated ADC slave. Use Value: 100 Mbps capability supports oversampled 1 MSPS ADC readouts without SPI clock throttling or added jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO722MDRG4 | 150 Mbps signaling rate, CMOS input thresholds (VCC/2), no input noise filter, lower jitter | Better suited for high-speed FPGA-to-FPGA links where timing margin is tighter and noise environment is controlled | Select ISO722MDRG4 only if system requires >100 Mbps and can tolerate absence of 2 ns noise rejection |
| ADUM1200ARZ | 2-channel, 100 Mbps, 3.3 V only, different pinout (SOIC-8 but non-drop-in), higher CMTI (25 kV/μs) | Used where channel count or board space efficiency matters more than single-channel optimization | Requires PCB redesign due to differing pin assignment; verify layout compatibility before substitution |
Compared with ISO722DRG4, ISO722MDRG4 offers higher speed but removes noise filtering, while ADUM1200ARZ provides dual-channel integration at the cost of non-pin-compatibility and reduced supply flexibility-making ISO722DRG4 optimal for cost-sensitive, noise-prone, single-channel industrial interfaces.
Availability
ISO722DRG4 is available at Aetrix Electronics and suitable for factory automation, servo control, and data acquisition applications requiring stable component supply, long-lifecycle support, and certified galvanic isolation.
Supply support for ISO722DRG4 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 90 years of innovation in industrial and automotive electronics.
The ISO72x family was designed specifically for high-reliability industrial isolation-targeting fieldbus interfaces, motor drives, and programmable logic controllers where safety certification, noise immunity, and timing precision are mandatory.
FAQ
What is the maximum signaling rate supported by ISO722DRG4?
The ISO722DRG4 supports a maximum signaling rate of 100 Mbps under recommended operating conditions. This value is specified across all supply combinations (3.3 V/3.3 V, 3.3 V/5 V, 5 V/5 V) and ambient temperatures from –40°C to +125°C. It is validated per TI's SLLS629O datasheet Section 6.3 and Table 4, distinguishing it from the 150 Mbps ISO722MDRG4 variant.
Does ISO722DRG4 require external components for basic operation?
No, ISO722DRG4 operates with no external passive components required for core isolation functionality. Only decoupling capacitors (0.1 µF ceramic near each VCC pin) are recommended per Section 9.3 of the datasheet. The device integrates its own noise filter, failsafe logic, and dc-refresh circuitry-eliminating need for external RC networks or pull-ups on IN/OUT.
How does the failsafe behavior of ISO722DRG4 function?
When input power is lost or IN is left floating/un-driven for longer than 4 µs, the ISO722DRG4's internal failsafe circuit drives OUT to a logic-high state within 3 µs. This behavior is inherent to the device architecture and does not require external configuration. It ensures predictable output state during power-up, brownout, or cable disconnect events in industrial control systems.
Can ISO722DRG4 operate with mismatched supply voltages?
Yes, ISO722DRG4 supports asymmetric supplies: VCC1 and VCC2 may be independently set to 3.3 V or 5 V (e.g., VCC1 = 3.3 V, VCC2 = 5 V). Input pins are 5 V tolerant when VCC1 = 3.3 V, and outputs drive CMOS levels compatible with either rail. This flexibility simplifies interfacing between mixed-voltage domains without level shifters.
What safety certifications apply to ISO722DRG4?
ISO722DRG4 is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation, UL 1577 (2500 VRMS withstand), and IEC 62368-1. Certifications are documented in Section 6.8 and Appendix A of the datasheet, with VDE certificate number 40047657 and UL file E181974-validating its use in safety-related industrial equipment.
ISO722DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
ISO722DRG4 FAQ
1.How can I place an order for ISO722DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO722DRG4 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 ISO722DRG4 reliable?
The price and inventory of ISO722DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO722DRG4 is usually 5 days.
3.What payment methods are accepted for ISO722DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO722DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO722DRG4?
ISO722DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO722DRG4 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 ISO722DRG4?
For technical support, including ISO722DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO722DRG4 requirements.
6.How does Aetrix verify that ISO722DRG4 is sourced from the original manufacturer or authorized distributors?
All ISO722DRG4 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 ISO722DRG4 meets industry standards.
7.What is the process for return or replacement of ISO722DRG4?
All ISO722DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ISO722DRG4, 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 ISO722DRG4 part is unused and in its original packaging.
Return procedure for ISO722DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO722DRG4 Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
