My Inquiry
My Account
Texas Instruments ISO7220ADG4
- Part No.:
- ISO7220ADG4
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO7220ADG4.pdf
- Description:
- DGTL ISO 2500VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,108
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISO7220ADG4 from Texas Instruments is a dual-channel digital isolator with 1 Mbps signaling rate, 600 ns max propagation delay, and 15 ns max pulse-width distortion, designed for galvanic isolation in industrial fieldbus interfaces such as Modbus and Profibus. It features 2.8V–5V dual-supply operation, 4 kV ESD protection, and operates across –40°C to +125°C.
For engineers reviewing the ISO7220ADG4 datasheet, ISO7220ADG4 pinout, ISO7220ADG4 application, or ISO7220ADG4 equivalent, this page delivers verified electrical specs, channel-to-channel skew data, failsafe behavior under input power loss, and safety certification details per VDE 0884-17 and UL 1577.
Technical Context
The ISO7220ADG4 uses TI's silicon-dioxide (SiO₂) isolation barrier to provide 4000 VPK galvanic isolation. Its architecture includes differential signal translation across the barrier and a 4 μs periodic dc-refresh pulse that triggers failsafe high-level output if input power is lost.
It implements TTL-compatible input thresholds with integrated noise filtering, supports independent 2.8V/3.3V/5V supplies on input (VCC1/GND1) and output (VCC2/GNDO) sides, and delivers 4 mA CMOS output drive capability with 5V-tolerant inputs when powered from 2.8V or 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | 1 Mbps - supports Modbus RTU and legacy Profibus DP at standard baud rates without oversampling |
| Propagation Delay | 600 ns max - ensures timing compliance in real-time servo control loops with ≤1 μs cycle budgets |
| Pulse-Width Distortion | 18 ns max - preserves duty-cycle integrity for PWM-based feedback signals in motor drives |
| Channel-to-Channel Skew | 15 ns max - enables synchronized dual-signal isolation for encoder A/B quadrature channels |
| Isolation Voltage | 4000 VPK per VDE - meets reinforced insulation requirements for 250 VRMS working voltage systems |
| Failsafe Output | Logic-high after 3 μs input power loss - prevents undefined states in safety-critical PLC I/O modules |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive ECUs and industrial motor controllers |
Pinout & Package
D-package 8-pin SOIC (4.9 mm × 6.0 mm), surface-mount, with creepage/clearance ≥4 mm and 0.008 mm internal insulation distance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA | Input, Channel A | TTL-compatible logic input with hysteresis; accepts 0–5 V signals regardless of VCC1 supply (2.8V/3.3V/5V) |
| INB | Input, Channel B | Independent TTL input with same noise-filtered threshold as INA; enables isolated dual-signal transmission |
| VCC1 | Input-Side Power Supply | Supplies input buffer and isolation barrier driver; supports 2.8V, 3.3V, or 5V operation |
| GND1 | Input-Side Ground | Reference for INA/INB inputs and VCC1; must be isolated from GNDO to maintain barrier integrity |
| OUTA | Output, Channel A | CMOS output driving up to 4 mA; logic state mirrors INA with failsafe high on input power loss |
| OUTB | Output, Channel B | CMOS output mirroring INB; channel-to-channel skew ≤15 ns ensures synchronous edge alignment |
| VCC2 | Output-Side Power Supply | Supplies output buffers and receiver circuitry; independent of VCC1 for level-shifting applications |
| GNDO | Output-Side Ground | Reference for OUTA/OUTB outputs and VCC2; forms isolated domain with GND1 across SiO₂ barrier |
Key Features
| Feature | Design Value |
|---|---|
| TTL Input Threshold + Noise Filter | Prevents false triggering from <200 ns transients-critical for noisy factory floor environments |
| 4 μs DC-Refresh Monitoring | Guarantees failsafe high output within 3 μs of input power loss-eliminates need for external watchdog circuits |
| 2.8V/3.3V/5V Dual-Supply Flexibility | Enables direct interface between 3.3V microcontrollers and 5V fieldbus transceivers without level shifters |
| VDE 0884-17 & UL 1577 Certification | Validated 4000 VPK isolation barrier with ≤5 pC partial discharge-meets IEC 61010-1 for test equipment |
| 150 kV/μs CMTI (typ) | Rejects fast common-mode edges from VFDs and relay switching-ensures reliable operation near motor drives |
Applications
| Factory Automation Interface | Servo Motor Control |
|---|---|
Use Scenario: Isolating RS-485 transceiver control lines in Modbus RTU master nodes deployed in metal-enclosed PLC cabinets. IC Role / Device Role / Timing Role: Dual-channel isolator separating MCU GPIOs from bus-side logic, with channel A for DE/RE control and channel B for TX enable. Use Value: Prevents ground-loop noise from corrupting half-duplex bus arbitration while maintaining <1 μs timing margin for 9600–115.2 kbps operation. | Use Scenario: Transmitting quadrature encoder A/B signals from a 24 VDC motor feedback circuit into a 3.3 V FPGA-based motion controller. IC Role / Device Role / Timing Role: Synchronizing dual-channel edge-aligned signals across isolation barrier with ≤15 ns skew to preserve direction detection accuracy. Use Value: Enables sub-micron position resolution by preserving phase relationship between A/B edges-no added interpolation error from skew. |
| Data Acquisition Front-End | Industrial PC Peripheral Interface |
Use Scenario: Isolating analog-to-digital converter (ADC) serial interface (SPI clock/data) in a 16-bit precision DAQ module measuring 4–20 mA sensor loops. IC Role / Device Role / Timing Role: Shielding low-noise ADC digital interface from high-voltage sensor-side transients and EMI. Use Value: Maintains 90 dB SNR by blocking >50 kV/μs common-mode noise-prevents bit errors in SPI frame transfers at 1 MSPS sampling. | Use Scenario: Connecting USB-to-RS232 converter ICs to isolated COM ports on ruggedized industrial PCs used in warehouse automation. IC Role / Device Role / Timing Role: Level-shifting and isolating UART TX/RX lines between 5V USB-UART bridge and 3.3V isolated RS232 transceiver. Use Value: Eliminates ground bounce during hot-plug events and allows mixed-voltage operation without discrete level shifters. |
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 |
|---|---|---|---|
| ISO7220CDR | 25 Mbps signaling rate, 42 ns max propagation delay, 2 ns max PWD; 2.8V/3.3V/5V supply support | Better suited for high-speed encoder interfaces or CAN FD physical layer isolation where timing margin is critical | Select ISO7220CDR when upgrading from ISO7220ADG4 for higher data throughput without changing PCB layout |
| ADUM1200ARZ | 25 Mbps, 55 ns max propagation delay, 3.3V-only supply, no 2.8V or 5V support; 2500 VRMS UL rating only | Limited to single-supply 3.3V systems; lacks VDE 0884-17 certification and failsafe monitoring | Choose ADUM1200ARZ only for cost-sensitive 3.3V-only designs where safety certifications are not required |
Compared with ISO7220CDR and ADUM1200ARZ, the ISO7220ADG4 provides optimal balance of industrial temperature range, dual-supply flexibility, failsafe behavior, and VDE/UL safety certification-making it preferred for certified PLC I/O modules and factory automation gateways requiring long-term reliability.
Availability
ISO7220ADG4 is available at Aetrix Electronics and suitable for factory automation interfaces, servo motor control systems, and industrial data acquisition requiring stable component supply over extended product lifecycles.
Supply support for ISO7220ADG4 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 high-reliability components for industrial, automotive, and communications markets.
The ISO722x family was engineered specifically for robust galvanic isolation in harsh industrial environments-delivering certified safety, wide temperature operation, and noise immunity for fieldbus, motor control, and measurement systems.
FAQ
What is the maximum signaling rate supported by the ISO7220ADG4?
The ISO7220ADG4 supports a maximum signaling rate of 1 Mbps. This is confirmed in the device family datasheet under "Features" and "Recommended Operating Conditions", where the A-option (denoted by 'A' in ISO7220A) is explicitly rated for 0–1000 kbps operation. Higher-speed variants like ISO7220CDR (25 Mbps) and ISO7220MDR (150 Mbps) exist but are distinct part numbers-not performance modes of the ISO7220ADG4.
Does the ISO7220ADG4 support 2.8V supply operation?
No, the ISO7220ADG4 does not support 2.8V supply operation. Only the ISO7220C variant (e.g., ISO7220CDR) is specified for 2.8V operation per Section 5.13 of the datasheet. The ISO7220ADG4 is an A-option device, which requires VCC1 and VCC2 supplies between 3.0 V and 5.5 V-confirmed in Section 5.3 Recommended Operating Conditions.
What happens to the outputs of the ISO7220ADG4 when input power is removed?
When input power (VCC1) is lost, the ISO7220ADG4 activates its failsafe circuit within 3 μs and drives both OUTA and OUTB to a logic-high state. This behavior is guaranteed by the 4 μs dc-refresh pulse mechanism described in the "Description" section and verified in Figure 6-2 of the datasheet-ensuring defined output states during brownout or cable disconnect events.
Is the ISO7220ADG4 pin-compatible with other ISO7220x devices in the D-package?
Yes, all ISO7220x devices-including ISO7220ADG4, ISO7220CDR, and ISO7220MDR-in the D-package (SOIC-8) share identical pinout and footprint. Table 4-1 confirms consistent pin assignments (e.g., INA on Pin 1, INB on Pin 2, etc.) across the ISO7220x series, enabling drop-in replacement for speed or feature upgrades without PCB revision.
What safety certifications apply to the ISO7220ADG4?
The ISO7220ADG4 is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced isolation, UL 1577 Component Recognition (File E181974), and IEC 62368-1. These are explicitly listed in Section 5.7 and the "Features" section-validating its 4000 VPK isolation barrier for use in safety-rated industrial equipment and test instruments.
ISO7220ADG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 475ns, 475ns
- Pulse Width Distortion (Max):
- 14ns
- 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
ISO7220ADG4 FAQ
1.How can I place an order for ISO7220ADG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7220ADG4 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 ISO7220ADG4 reliable?
The price and inventory of ISO7220ADG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7220ADG4 is usually 5 days.
3.What payment methods are accepted for ISO7220ADG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7220ADG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7220ADG4?
ISO7220ADG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7220ADG4 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 ISO7220ADG4?
For technical support, including ISO7220ADG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7220ADG4 requirements.
6.How does Aetrix verify that ISO7220ADG4 is sourced from the original manufacturer or authorized distributors?
All ISO7220ADG4 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 ISO7220ADG4 meets industry standards.
7.What is the process for return or replacement of ISO7220ADG4?
All ISO7220ADG4 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7220ADG4, 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 ISO7220ADG4 part is unused and in its original packaging.
Return procedure for ISO7220ADG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7220ADG4 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…
