ISO7721FQDWRQ1 - Automotive Reinforced 2-Ch Digital Isolator | TI
Référence : ISO7721FQDWRQ1 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 |
ISO7721FQDWRQ1 Présentation
Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. They are essential in systems where safety and signal integrity are critical, such as in electric vehicles, industrial motor drives, and medical equipment. The ISO7721FQDWRQ1 belongs to the ISO772x-Q1 family, which is part of TI's broad portfolio of isolation products.
Key features include a reinforced isolation rating per VDE 0884-10 and UL 1577, a default output state of low (suffix F) when input power is lost, and a wide supply voltage range of 2.25 V to 5.5 V. The device also offers a 1/1 channel configuration (one forward, one reverse), making it ideal for bidirectional isolation. Its robust EMC performance ensures reliable operation in noisy environments.
The ISO7721FQDWRQ1 uses TI's capacitive isolation technology, which provides low power consumption and high-speed operation. The device is AEC-Q100 qualified for automotive applications, ensuring reliability under extreme temperature and vibration conditions. It also features an enable pin for output control and a fail-safe mechanism that sets outputs to a known state during power loss.
Typical applications include isolated SPI, UART, and CAN interfaces in automotive battery management systems, on-board chargers, and industrial fieldbus communication. The high CMTI and reinforced isolation make it suitable for motor drive inverters and power converters where fast switching transients are present.
When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances to maintain isolation ratings. Place decoupling capacitors close to the VCC pins and follow the recommended layout guidelines in the datasheet to achieve optimal EMC performance.
Alternatives de remplacement direct pour ISO7721FQDWRQ1 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ISO7721FQDWRQ1 (même facteur de forme et même empreinte) — différant par Package, Number of Channels, Data Rate, Isolation Rating, Operating Temperature Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ISO7721QDWRQ1
✅ Remplacement direct✓ En stock
$1.85 / unité
Voir la fiche technique →ISO7721BDWR
✅ Remplacement direct✓ En stock
$1.75 / unité
Voir la fiche technique →ISO7721DW
✅ Remplacement direct✓ En stock
$1.45 / unité
Voir la fiche technique →ISO7241MDW
✅ Remplacement direct✓ En stock
$2.19 / unité
Voir la fiche technique →ISO7721FQDWRQ1 Spécifications
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 |
| Channel Configuration | 1/1 (1 forward, 1 reverse) |
| Débit de données | 100 Mbps |
| CMTI | 85 kV/µs |
| Supply Voltage Range | 2.25 V to 5.5 V |
| Default Output State | Low (suffix F) |
| Boîtier | 16-SOIC (DWR), 7.50 mm width |
| Plage de température de fonctionnement | -40°C to +125°C |
| Isolation Rating | Reinforced per VDE 0884-10, UL 1577 |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
Configuration des broches de ISO7721FQDWRQ1
| Broche 1 | VCC1 — Power supply for side 1 |
| Broche 2 | GND1 — Ground for side 1 |
| Broche 3 | INA — Input channel A (side 1) |
| Broche 4 | OUTB — Output channel B (side 1) |
| Broche 5 | NC — No connect |
| Broche 6 | NC — No connect |
| Broche 7 | NC — No connect |
| Broche 8 | NC — No connect |
| Broche 9 | NC — No connect |
| Broche 10 | NC — No connect |
| Broche 11 | NC — No connect |
| Broche 12 | NC — No connect |
| Broche 13 | OUTA — Output channel A (side 2) |
| Broche 14 | INB — Input channel B (side 2) |
| Broche 15 | GND2 — Ground for side 2 |
| Broche 16 | VCC2 — Power supply for side 2 |
Applications typiques
ISO7721FQDWRQ1 convient pour 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ISO7721FQDWRQ1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Automotive AEC-Q100 qualification (vs ISO7721BDWR)
- Default output low (fail-safe) (vs ISO7721QDWRQ1)
- Reinforced isolation rating (vs ISO7721DW)
Notes de conception
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.
Informations de conformité
AEC-Q100 qualified per TI product page. RoHS compliant. REACH compliance assumed based on TI's global compliance policy.
