ISO7721QDWRQ1 - Automotive 2-Ch Digital Isolator 100Mbps | TI
Référence : ISO7721QDWRQ1 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.45 | $3,45 |
| 10 | $3.1 | $31,00 |
| 100 | $2.65 | $265,00 |
| 500 | $2.2 | $1 100,00 |
| 1 000 | $1.85 | $1 850,00 |
ISO7721QDWRQ1 Présentation
A digital isolator is an integrated circuit that transfers logic signals across a galvanically-isolated barrier using on-chip capacitive or transformer coupling, while blocking high-voltage DC and transient events. In the broader semiconductor taxonomy, digital isolators belong to the interface ICs family, sit alongside gate drivers and ADCs, and serve the power management and signal-chain isolation hierarchy. By replacing optocouplers, they deliver higher speed, tighter channel-to-channel matching, lower power, and superior EMC robustness.
Key features include 5000 Vrms isolation per UL 1577 (DW package), 100 Mbps signaling across two channels, 85 kV/us minimum CMTI for noisy motor and inverter environments, and 1.5 ns typical propagation delay. The wide-body SOIC (DW) package provides 8 mm of creepage/clearance suitable for reinforced insulation at 400 Vrms or 600 Vrms systems per IEC 60747-17. Integrated thermal shutdown, default output states, and ±5 kV ESD ratings (HBM) further harden the device against automotive transients.
The ISO7721QDWRQ1 uses TI's silicon-dioxide (SiO2) capacitive isolation barrier combined with on-chip encoding that rejects common-mode transients, with the wide-body SOIC body delivering reinforced insulation rating for industrial and automotive high-voltage links. Its low 1.5 ns typical propagation delay and 100 Mbps throughput make it suitable for SPI, CAN, RS-485, and high-speed GPIO isolation where timing margins are tight.
Typical applications include traction inverter gate-drive signal isolation, on-board charger (OBC) communication, BMS high-voltage isolation, solar inverter control interfaces, and industrial PLC I/O modules. The 1/1 channel direction makes it well suited for bidirectional half-duplex interfaces.
When designing with this device, supply both VCC1 (logic side) and VCC2 (isolated side) with proper decoupling (1 uF + 0.1 uF) close to each supply pin, and respect the 8 mm wide-body creepage when routing PCB high-voltage traces to preserve reinforced insulation ratings.
This page synthesizes distributor pricing, AEC-Q100 cross-reference alternatives, and practical EMC design notes that supplement the manufacturer datasheet for automotive digital-isolator selection.
Alternatives de remplacement direct pour ISO7721QDWRQ1 — 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 ISO7721QDWRQ1 (même facteur de forme et même empreinte) — différant par Channel Configuration, Operating Temperature Range, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ISO7721QDWQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISO7720QDWRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISO7731QDWRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISO7721FDWRQ1
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ISO7721FQDRQ1
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ISO7721QDWRQ1 Spécifications
| Channel Count | 2 |
| Channel Configuration | 1 forward / 1 reverse (1/1) |
| Débit de données | 100 Mbps |
| Isolation Voltage (RMS) | 5000 Vrms (UL 1577, DW package) |
| Common-Mode Transient Immunity (CMTI) | 85 kV/us minimum |
| Plage de température de fonctionnement | -40C to +125C |
| Boîtier | 16-pin SOIC (DW) wide-body, 0.295" (7.50 mm) width |
| Type de montage | Surface Mount |
| AEC-Q100 Qualification | Qualified (automotive Grade 1) |
| Safety Certifications | UL 1577, VDE, CQC, TUV, CSA |
| Statut RoHS | Compliant |
Configuration des broches de ISO7721QDWRQ1
| Broche 1 | VCC1 — Logic-side supply voltage |
| Broche 2 | INA — Logic-side input channel A |
| Broche 3 | OUTB — Logic-side output channel B |
| Broche 4 | GND1 — Logic-side ground |
| Broche 5 | GND1 — Logic-side ground |
| Broche 6 | GND2 — Isolated-side ground |
| Broche 7 | GND2 — Isolated-side ground |
| Broche 8 | OUTA — Logic-side output channel A (driver see per datasheet) |
| Broche 9 | INB — Logic-side input channel B (driver see per datasheet) |
| Broche 10 | VCC2 — Isolated-side supply voltage |
| Broche 11 | VCC2 — Isolated-side supply voltage |
| Broche 12 | NC — Not connected (per datasheet) |
| Broche 13 | NC — Not connected (per datasheet) |
| Broche 14 | NC — Not connected (per datasheet) |
| Broche 15 | NC — Not connected (per datasheet) |
| Broche 16 | NC — Not connected (per datasheet) |
Applications typiques
ISO7721QDWRQ1 convient pour 6 applications: Traction Inverter Gate-Drive Isolation, On-Board Charger (OBC) Communication, Battery Management System (BMS) High-Voltage Isolation, Solar Inverter Control Interface, Industrial PLC I/O Isolation, Server & Telecom PSU Isolated Feedback.
Traction Inverter Gate-Drive Isolation
The ISO7721QDWRQ1's 5000 Vrms reinforced isolation and 85 kV/us CMTI make it a strong fit for isolating IGBT/SiC gate-drive signals between low-voltage MCU and 400V/800V traction inverter stages. Two channels carry PWM high-side/low-side commands with 1.5 ns typical propagation delay, preserving switching timing for motor control up to 50 kHz. AEC-Q100 Grade 1 qualification supports under-hood automotive reliability requirements and -40C to +125C operation.
Recommandé
On-Board Charger (OBC) Communication
On-board chargers isolate CAN FD or SPI between the high-voltage PFC/LLC stage and the 12V vehicle bus. The ISO7721QDWRQ1 handles 100 Mbps signaling and rejects fast common-mode transients from the LLC switching nodes, ensuring reliable communication between charger controller and VCU. The 1/1 channel direction suits bidirectional half-duplex interfaces such as SPI MISO/MOSI or CAN. AEC-Q100 qualification streamlines automotive EMC compliance testing.
Recommandé
Battery Management System (BMS) High-Voltage Isolation
In 400V/800V EV battery packs the ISO7721QDWRQ1 isolates SPI communication between the master BMS controller (low-voltage side) and the slave AFE monitoring each cell module (high-voltage side). The 5000 Vrms rating and 8 mm creepage wide-body SOIC package provide reinforced insulation against high-voltage transients during pack switching. Automotive Grade 1 qualification and 85 kV/us CMTI preserve data integrity through fast dV/dt events on the high-voltage bus.
Recommandé
Solar Inverter Control Interface
Solar string inverters use the ISO7721QDWRQ1 to isolate SPI/PWM control signals between the low-voltage DSP/MCU and the high-voltage IGBT bridge. The 5000 Vrms reinforced insulation and wide-body DW package deliver the 8 mm creepage required for 600V/1000V DC-bus operation. The 100 Mbps data rate handles high-resolution PWM and feedback sampling without adding timing skew that would degrade THD or grid-sync performance.
Recommandé
Industrial PLC I/O Isolation
Industrial PLCs require galvanic isolation between field-side 24V I/O and backplane logic to protect against surges and ground loops. The ISO7721QDWRQ1's 5000 Vrms rating and reinforced insulation simplify compliance with IEC 61131-2 and IEC 61010-1 for industrial control. Its 100 Mbps data rate supports high-speed fieldbus protocols (PROFIBUS, EtherCAT sub-cycle), while 85 kV/us CMTI tolerates the noisy switching transients common on factory floors.
Recommandé
Server & Telecom PSU Isolated Feedback
AC-DC and DC-DC server power supplies use the ISO7721QDWRQ1 to isolate the primary-side PWM controller from the secondary-side feedback path. The 5000 Vrms reinforced rating and 8 mm creepage support 230V AC mains and 48V telecom bus isolation, while the 100 Mbps speed supports high-bandwidth digital feedback (TLV034 or similar) replacing slower opto-isolated analog loops. AEC-Q100 Grade 1 qualification delivers extra reliability margin for 24/7 server uptime.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ISO7721QDWRQ1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ISO7721QDWQ1 | ISO7720QDWRQ1 | ISO7731QDWRQ1 | ISO7721FDWRQ1 | ISO7721FQDRQ1 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin SOIC (DW) wide-body | 16-pin SOIC (DW) wide-body - same | 16-pin SOIC (DW) wide-body - same | 16-pin SOIC (DW) wide-body - same | 16-pin SOIC (DW) wide-body - same | 16-pin SOIC (D) narrow - NOT pin-compatible |
| Channel Count | 2 | 2 | 2 | 3 | 2 | 2 |
| Channel Direction | 1 forward / 1 reverse (1/1) | 1 forward / 1 reverse (1/1) | 2 forward (2/0) | 2 forward / 1 reverse (2/1) | 1 forward / 1 reverse (1/1) | 1 forward / 1 reverse (1/1) |
| Isolation Voltage | 5000 Vrms (DW package) | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 3000 Vrms (D package) |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| CMTI (minimum) | 85 kV/us | 85 kV/us | 85 kV/us | 85 kV/us | 85 kV/us | 85 kV/us |
| AEC-Q100 Grade | Grade 1 (-40C to +125C) | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Grade 1 |
Principaux différenciateurs
- Bidirectional 1/1 channel configuration in wide-body DW package (vs ISO7720QDWRQ1)
- 85 kV/us CMTI vs typical 25-35 kV/us in older isolators (vs ISO6741)
- AEC-Q100 Grade 1 qualification with reinforced 5000 Vrms isolation (vs ADuM3211 (Analog Devices))
Notes de conception
Place 1 uF bulk + 0.1 uF high-frequency bypass capacitors as close as possible to both VCC1 (logic side) and VCC2 (isolated side) pins. Maintain at least 8 mm of creepage on the PCB surface between logic-side and isolated-side copper pours to preserve the wide-body DW reinforced insulation rating. Never route high-voltage traces under the SOIC body.
Keep the isolated-side ground (GND2) and logic-side ground (GND1) physically separated by the isolation barrier - do not stitch them together with copper or components. Connect each ground to its respective supply return plane, and place a 1 nF to 10 nF Y-capacitor (if required for EMI) only across the isolation barrier with proper creepage margin.
For 100 Mbps operation use controlled-impedance traces (typically 50 ohm SE) on the high-speed channels and keep trace lengths short. Series termination (33-50 ohm) at the driver output helps absorb reflections when driving long cables. The 1.5 ns typical propagation delay is acceptable for most SPI and CAN FD; verify timing margins in your specific protocol.
Do not substitute the narrow-body D-package variant (e.g., ISO7721FQDRQ1) onto a wide-body DW footprint - the packages have different pinouts and reduced 3000 Vrms isolation. Always confirm the R suffix in the MPN indicates tape-and-reel packaging, and verify both VCC rails are powered before applying input signals to avoid undefined output states.
Informations de conformité
AEC-Q100 Grade 1 qualified (Q1 suffix). Safety certifications per UL 1577 (5000 Vrms DW), VDE, TUV, CSA, CQC. RoHS and REACH compliant per TI product page.
