ISO7721FQDWRQ1 - Automotive Reinforced 2-Ch Digital Isolator | TI
MPN: ISO7721FQDWRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.19 | $2,190.00 |
Drop-in alternatives for ISO7721FQDWRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISO7721QDWRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7721BDWR
✅ Drop-In✓ In Stock
$1.75 / Unit
View Datasheet →ISO7721DW
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →ISO7241MDW
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ISO7721FQDWRQ1 Maximum Ratings & Electrical Characteristics
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 |
| Channel Configuration | 1/1 (1 forward, 1 reverse) |
| Data Rate | 100 Mbps |
| CMTI | 85 kV/µs |
| Supply Voltage Range | 2.25 V to 5.5 V |
| Default Output State | Low (suffix F) |
| Package | 16-SOIC (DWR), 7.50 mm width |
| Operating Temperature Range | -40°C to +125°C |
| Isolation Rating | Reinforced per VDE 0884-10, UL 1577 |
| AEC-Q100 | Qualified |
| Propagation Delay | [DATA_NEEDED: Propagation delay] |
| Pulse Width Distortion | [DATA_NEEDED: Pulse width distortion] |
| Power Consumption | [DATA_NEEDED: Power consumption] |
| RoHS | Compliant |
ISO7721FQDWRQ1 Pin Configuration
| Pin 1 | VCC1 — Power supply for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | INA — Input channel A (side 1) |
| Pin 4 | OUTB — Output channel B (side 1) |
| Pin 5 | NC — No connect |
| Pin 6 | NC — No connect |
| Pin 7 | NC — No connect |
| Pin 8 | NC — No connect |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | OUTA — Output channel A (side 2) |
| Pin 14 | INB — Input channel B (side 2) |
| Pin 15 | GND2 — Ground for side 2 |
| Pin 16 | VCC2 — Power supply for side 2 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ISO7721FQDWRQ1 is suitable for 6 applications: Automotive Battery Management System (BMS), Industrial Fieldbus Communication, Motor Drive Inverters, On-Board Charger (OBC) for EVs, Isolated SPI Communication, Isolated UART Communication.
Automotive Battery Management System (BMS)
The ISO7721FQDWRQ1 provides galvanic isolation for communication between the battery cell monitoring ICs and the main controller in a BMS. Its 5000 Vrms isolation and 85 kV/µs CMTI ensure reliable data transfer in the presence of high-voltage switching transients from the battery pack. The AEC-Q100 qualification guarantees operation over the automotive temperature range (-40°C to +125°C). The default low output state (suffix F) provides a fail-safe condition during power loss, preventing unintended commands to the battery disconnect circuitry. With a data rate of 100 Mbps, it can handle the high-speed SPI communication used in modern BMS designs, ensuring real-time monitoring and control.
Recommended
Industrial Fieldbus Communication
In industrial automation, the ISO7721FQDWRQ1 isolates the fieldbus transceiver from the controller, protecting against ground loops and voltage spikes. Its 100 Mbps data rate supports high-speed protocols like PROFIBUS and EtherCAT. The reinforced isolation rating (5000 Vrms) meets safety standards for industrial equipment. The high CMTI of 85 kV/µs ensures error-free communication in environments with motor drives and other noise sources. The device's wide supply voltage range (2.25 V to 5.5 V) allows direct interface with 3.3 V or 5 V logic, simplifying design. The default low output state ensures that the bus is in a defined state during power-up or fault conditions, preventing spurious data.
Recommended
Motor Drive Inverters
The ISO7721FQDWRQ1 isolates the gate driver signals from the microcontroller in motor drive inverters. Its 85 kV/µs CMTI is critical to prevent false triggering of the power switches during fast switching transients. The 5000 Vrms isolation provides protection against high-voltage DC bus voltages. The device's 100 Mbps data rate allows for high-resolution PWM signals, improving motor control accuracy. The AEC-Q100 qualification makes it suitable for automotive traction inverters. The default low output state ensures that the gate drivers are disabled during power loss, preventing shoot-through and protecting the inverter. The wide temperature range (-40°C to +125°C) ensures reliable operation in under-hood environments.
Recommended
On-Board Charger (OBC) for EVs
In electric vehicle on-board chargers, the ISO7721FQDWRQ1 isolates the control signals between the primary and secondary sides of the power converter. Its reinforced isolation (5000 Vrms) meets the safety requirements for mains-connected equipment. The high CMTI ensures reliable communication in the presence of high dv/dt from the switching power stage. The device's 100 Mbps data rate supports fast feedback loops for power factor correction and DC-DC conversion. The AEC-Q100 qualification ensures reliability in the automotive environment. The default low output state provides a fail-safe condition during fault events, preventing damage to the charger. The wide supply voltage range allows interface with various logic levels used in the charger control circuitry.
Recommended
Isolated SPI Communication
The ISO7721FQDWRQ1 is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, or sensors. Its 100 Mbps data rate easily handles SPI clock speeds up to 50 MHz. The 1/1 channel configuration (one forward, one reverse) is perfect for SPI, which requires a clock/data line in one direction and data out in the other. The 5000 Vrms isolation protects sensitive electronics from high-voltage transients. The device's low propagation delay ensures minimal timing skew in high-speed SPI communication. The default low output state ensures that the slave device is not selected during power-up, preventing bus contention. The wide supply voltage range allows level shifting between different logic domains.
Recommended
Isolated UART Communication
The ISO7721FQDWRQ1 provides galvanic isolation for UART communication between systems operating at different ground potentials. Its 100 Mbps data rate far exceeds typical UART speeds (up to 1 Mbps), ensuring error-free transmission. The 1/1 channel configuration matches the TX/RX pair of a UART interface. The 5000 Vrms isolation protects against ground potential differences and electrical noise. The high CMTI ensures reliable communication in industrial environments with heavy machinery. The default low output state prevents false data during power-up. The device's wide supply voltage range allows direct connection to 3.3 V or 5 V UART logic. The AEC-Q100 qualification makes it suitable for automotive diagnostics and telematics.
Recommended
Recommended Products Summary
Engineering reference data for ISO7721FQDWRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO7721QDWRQ1 | ISO7721BDWR | ISO7721DW |
|---|---|---|---|---|
| Package | 16-SOIC (DWR) | 16-SOIC (DWR) | 16-SOIC (DWR) | 16-SOIC (DWR) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| CMTI | 85 kV/µs | 85 kV/µs | 85 kV/µs | 85 kV/µs |
| Default Output State | Low | High | Low | High |
| AEC-Q100 | Qualified | Qualified | Not qualified | Not qualified |
| Channel Configuration | 1/1 | 1/1 | 1/1 | 1/1 |
Key Differentiators
- Automotive AEC-Q100 qualification (vs ISO7721BDWR)
- Default output low (fail-safe) (vs ISO7721QDWRQ1)
- Reinforced isolation rating (vs ISO7721DW)
Design Notes
For reinforced isolation, ensure PCB creepage and clearance distances meet the requirements of the isolation rating. For 5000 Vrms, the minimum creepage is typically 8 mm for pollution degree 2, as per IEC 60664-1. Use a slot or gap under the isolator to increase creepage distance. Follow the layout guidelines in the TI datasheet (SLLSEP2) for optimal performance.
Decouple each VCC pin with a 0.1 µF ceramic capacitor placed as close as possible to the pin, and a 10 µF bulk capacitor on each side. The ISO7721FQDWRQ1 draws low quiescent current, but high-speed switching can cause transient currents. Proper decoupling ensures stable operation and reduces EMI.
Do not exceed the absolute maximum ratings for supply voltage (6 V) or input/output voltages. Ensure the default output state (low for suffix F) is compatible with your system's fail-safe requirements. If a high default is needed, use the ISO7721QDWRQ1. Also, verify that the data rate and propagation delay meet your timing budget.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS compliant. REACH compliance assumed based on TI's global compliance policy.
