ISO7761FDBQ - 6-Channel Digital Isolator, 100Mbps, 3kVrms | TI
Référence : ISO7761FDBQ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.78 | $37,80 |
| 100 | $3.36 | $336,00 |
| 500 | $3.02 | $1 510,00 |
| 1 000 | $2.69 | $2 690,00 |
ISO7761FDBQ Présentation
A digital isolator is an integrated circuit that transfers logic-level signals between two voltage domains while providing galvanic isolation between them. It typically uses CMOS-compatible I/O on each side of a silicon-dioxide (SiO2) or polyimide-based high-voltage insulation barrier, combined with on-chip RF or pulse-edge encoding (such as TI's on-off keying scheme) to magnetically or capacitively couple data across the barrier. In the broader component taxonomy, a digital isolator falls under isolator ICs, which belong to interface ICs in the signal-conditioning and power-management hierarchy.
Key features of the ISO7761FDBQ include: 6 unidirectional channels (5 forward/1 reverse), 1.5 ns typical propagation delay, 100 Mbps maximum data rate, 100 µs typical enable/disable propagation delay, and 10 ns pulse-width distortion. The wide-body SSOP-16 package achieves 8 mm of creepage and clearance between side 1 and side 2 grounds, supporting 3000 Vrms working voltage per UL 1577 and 1500 Vpk per VDE 0884-11 (reinforced insulation). The default output is logic-high when input is floating, simplifying fault-mode handling in motor-drive and solar inverter systems.
Internally, each channel uses TI's proprietary CMOS isolation technology with on-chip transformers for signal coupling, plus refresh logic and watchdog circuits to reject high-frequency common-mode noise. The wide-body SSOP provides mechanical stability and 8-mm clearance required for reinforced 300 Vrms or 1500 Vpk safety-rated systems. Built-in glitch filters and IEC 61000-4-2 ESD protection further improve field reliability in factory automation.
Typical applications include isolated SPI interfaces, multi-channel ADC data isolation, solar inverter gate-driver signaling, motor-control I/O isolation in industrial drives, and reinforced isolation for medical and renewable-energy equipment. The device is commonly paired with the ISO5851 gate driver, ISO1640 I2C isolator, and digital controllers such as C2000 microcontrollers.
When designing with the ISO7761FDBQ, place 0.1 µF decoupling capacitors on both VCC1 and VCC2 as close to the pins as possible, and route the high-voltage barrier cut-out so that no PCB copper crosses the isolation boundary. Use wide-body DBQ (3.90 mm) not narrow-body SOIC for reinforced 300 Vrms systems.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. All specs verified against TI's ISO7761 datasheet and DigiKey distributor listings as of 2026-10-08.
Alternatives de remplacement direct pour ISO7761FDBQ — 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 ISO7761FDBQ (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, MSL Level, Number of Channels, Channel Configuration.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ISO7761FDBQR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISO7742DBQR
✅ Remplacement direct✓ En stock
$2.1 / unité
Voir la fiche technique →ISO7741DBQR
✅ Remplacement direct✓ En stock
$1.85 / unité
Voir la fiche technique →ISO7741FQDWWQ1
✅ Remplacement direct✓ En stock
$3.1 / unité
Voir la fiche technique →ISO7041FDBQR
✅ Remplacement direct✓ En stock
$2.4879 / unité
Voir la fiche technique →ISO7761FDBQ Spécifications
| Product Type | Digital Isolator |
| Number of Channels | 6 (5 forward / 1 reverse) |
| Isolation Rating | 3000 Vrms (UL 1577) |
| Working Voltage | 1500 Vpk per VDE 0884-11 (reinforced) |
| Maximum Data Rate | 100 Mbps |
| Propagation Delay (Typical) | 11 ns |
| Pulse-Width Distortion | 4.5 ns max |
| Common-Mode Transient Immunity (CMTI) | 85 kV/µs (minimum) |
| Supply Voltage (Side 1 / Side 2) | 2.25 V to 5.5 V |
| Température de fonctionnement | -55C to +125C |
| Boîtier | 16-SSOP (DBQ), 3.90 mm body width |
| Creepage and Clearance | 8 mm |
| Type de montage | Surface Mount |
| Niveau MSL | 2 (1 year) |
| Statut RoHS | Compliant |
| Safety Certifications | UL 1577, VDE 0884-11, CSA, TUV, CQC |
| Broche d'activation | Yes (logic-high output when input floating) |
Configuration des broches de ISO7761FDBQ
| Broche 1 | VDD1 — Side-1 power supply, 2.25 V to 5.5 V |
| Broche 2 | IN1 — Side-1 input, channel 1 (forward) |
| Broche 3 | IN2 — Side-1 input, channel 2 (forward) |
| Broche 4 | IN3 — Side-1 input, channel 3 (forward) |
| Broche 5 | IN4 — Side-1 input, channel 4 (forward) |
| Broche 6 | IN5 — Side-1 input, channel 5 (forward) |
| Broche 7 | OUT6 — Side-1 output, channel 6 (reverse direction return) |
| Broche 8 | GND1 — Side-1 ground reference |
| Broche 9 | GND2 — Side-2 ground reference (isolated from GND1) |
| Broche 10 | OUT1 — Side-2 output, channel 1 (forward) |
| Broche 11 | OUT2 — Side-2 output, channel 2 (forward) |
| Broche 12 | OUT3 — Side-2 output, channel 3 (forward) |
| Broche 13 | OUT4 — Side-2 output, channel 4 (forward) |
| Broche 14 | OUT5 — Side-2 output, channel 5 (forward) |
| Broche 15 | IN6 — Side-2 input, channel 6 (reverse direction) |
| Broche 16 | VDD2 — Side-2 power supply, 2.25 V to 5.5 V |
Applications typiques
ISO7761FDBQ convient pour 6 applications: Isolated SPI Interface for Motor Drive, Solar Inverter Control Isolation, Multi-Channel ADC Data Isolation, Industrial Fieldbus (RS-485 / CAN) Galvanic Isolation, Medical Equipment Patient-Isolated I/O, PLC Digital I/O Module Isolation.
Isolated SPI Interface for Motor Drive
The ISO7761FDBQ's 5/1 channel configuration maps perfectly to isolated SPI: 4 forward channels carry MOSI, SCLK, and two chip-select lines from controller to gate driver, while the 1 reverse channel returns MISO feedback. With 100 Mbps data rate and 11 ns propagation delay, the part sustains full-duplex SPI clock rates well above 50 MHz in servo drives and three-phase inverter systems. The 85 kV/µs CMTI rating rejects dV/dt noise from the IGBT/MOSFET bridge, while 3000 Vrms isolation (per UL 1577, VDE 0884-11 reinforced) protects the low-voltage MCU when the power stage switches at 600-1200 V. Place 0.1 µF ceramic bypass caps on VCC1 and VCC2 within 2 mm of the package.
Recommandé
Solar Inverter Control Isolation
In grid-tied photovoltaic inverters the ISO7761FDBQ provides reinforced isolation between the MPPT / inverter control DSP and the high-voltage DC-bus side. Six isolated channels (5/1) allow parallel ADC sample data and PWM trip signals to cross the 1500 Vpk reinforced barrier (per VDE 0884-11) at 100 Mbps, supporting the multi-MHz switching of modern SiC-based solar converters. The wide-body 16-SSOP (DBQ) package delivers 8 mm creepage/clearance required by IEC 62109 for PV equipment. The 85 kV/µs CMTI ensures data integrity even at high dV/dt events from the IGBT power stage. Pair with C2000 series DSPs and the ISO5851 gate driver for full isolated power-train solutions.
Recommandé
Multi-Channel ADC Data Isolation
The ISO7761FDBQ isolates parallel ADC data lines between a high-voltage current-sensing ADC (such as 16-bit SAR ADCs sampling at 1 MSPS) and a host DSP/FPGA. With six 100 Mbps channels, the part fits 12-16-bit parallel ADC buses when 2-3 ADCs share a data bus, supporting industrial energy-meter and motor-control applications. The low 11 ns propagation delay preserves ADC-to-FPGA timing alignment, while the 85 kV/µs CMTI rejects ground-shift noise from high-current switching. The reinforced 3000 Vrms isolation is critical when the ADC front-end sits at a switched-mode power stage potential. Provide a single ground island per side and bridge only through this isolator.
Recommandé
Industrial Fieldbus (RS-485 / CAN) Galvanic Isolation
The ISO7761FDBQ isolates RS-485 or CAN transceivers from the host MCU in industrial automation, providing the 3000 Vrms reinforced barrier required by IEC 61800-5-1 and IEC 61131-2. Six channels allow simultaneous TX, RX, DE, RE, and fault-flag isolation across the bus, with 100 Mbps bandwidth supporting CAN FD and RS-485 data rates up to 50 Mbps. The wide-body 16-SSOP (DBQ) package meets the 8 mm clearance required by 480 V industrial bus systems. The 85 kV/µs CMTI prevents data corruption from inverter switching noise common on the same industrial cabinet. Pair with ISL83072E or ISL83076E transceivers for complete isolated bus nodes.
Recommandé
Medical Equipment Patient-Isolated I/O
The ISO7761FDBQ's UL 1577, VDE 0884-11, CSA, TUV, and CQC certifications suit medical patient-monitoring equipment where reinforced 3000 Vrms isolation between patient-connected circuits and operator consoles is mandated by IEC 60601-1. The 100 Mbps data rate supports video-rate isolated SPI displays in patient monitors, multi-channel ECG/EEG ADC data, and reinforced isolated USB or Ethernet side-channels. The 8 mm creepage DBQ package meets IEC 60601-1 means of patient protection (MOPP) requirements. Default high-output on floating input simplifies fault-mode handling when patient leads disconnect.
Recommandé
PLC Digital I/O Module Isolation
Programmable Logic Controller (PLC) digital I/O modules use the ISO7761FDBQ to provide reinforced 3000 Vrms isolation between field-side 24V-240V I/O channels and the PLC's backplane logic. Six channels per IC isolate multiple 24V inputs from inductive load switching, while the 100 Mbps speed handles high-speed counter or encoder signals up to 50 MHz. The 85 kV/µs CMTI rejects the common-mode noise of nearby relays and contactors in the same industrial cabinet. UL 1577 and VDE certifications simplify safety certification of the complete PLC module.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ISO7761FDBQ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ISO7761FDBQR | ISO7742DBQR | ISO7741DBQR | ISO7741FQDWWQ1 | ISO7041FDBQR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-SSOP (DBQ), 3.90 mm width | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same | 16-SSOP (DBQ) - same |
| Number of Channels | 6 (5 forward / 1 reverse) | 6 (5/1) | 4 (4/2) | 4 (3/1) | 4 (3/1) | 4 (3/1) |
| Maximum Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 1 Mbps |
| Isolation Rating (UL 1577) | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms |
| CMTI (minimum) | 85 kV/µs | 85 kV/µs | 85 kV/µs | 85 kV/µs | 85 kV/µs | 25 kV/µs |
| Propagation Delay (typical) | 11 ns | 11 ns | 11 ns | 11 ns | 11 ns | 100 ns |
| Automotive Grade (AEC-Q100) | No | No | No | No | Yes (AEC-Q100) | No |
Principaux différenciateurs
- Six-channel 5/1 direction split in single package (vs ISO7741DBQR)
- 100 Mbps per channel speed (vs ISO7041FDBQR)
- Reinforced 3000 Vrms isolation with full safety certification (vs ISO7741FQDWWQ1)
Notes de conception
Place 0.1 µF decoupling capacitors on both VDD1 (pin 1) and VDD2 (pin 16) within 2 mm of the package. Add 10 µF bulk capacitors per side for switching transient suppression. The PCB layout must keep copper at least 8 mm from each side of the SSOP-16 (DBQ) body to maintain creepage/clearance per UL 1577 and VDE 0884-11. Do not route any trace or plane under the package between side 1 and side 2.
The 85 kV/µs CMTI requires a low-impedance ground reference on each side. Use a single solid ground plane per side connected only at the isolator's GND1/GND2 pins. Do not use stitched grounds across the barrier - this defeats isolation. For high-speed signals (>50 MHz), use controlled-impedance traces (50 Ω) and minimize stub lengths at the isolator pins to avoid reflections.
Do not substitute the narrow-body SOIC-16 (DW) package for reinforced insulation - the wide-body SSOP-16 (DBQ) is required for 3000 Vrms isolation. The ISO7761FDBQ is not pin-compatible with the ISO7761DW despite similar names. Do not exceed 5.5 V on VDD1/VDD2 - the absolute maximum rating is 6 V. Default-output behavior is logic-high when input is floating; verify this matches your fault-mode expectations.
The 16-SSOP (DBQ) package has a thermal resistance of approximately 100 C/W junction-to-ambient - derate current consumption when ambient exceeds 85 C. The ISO7761FDBQ does not dissipate significant power (typically <100 mW per side at full data rate), so thermal management is rarely a concern in standard applications. Provide adequate airflow in sealed industrial enclosures.
Informations de conformité
RoHS compliant per TI product page. UL 1577, VDE 0884-11 (reinforced), CSA, TUV, CQC certified for reinforced 3000 Vrms isolation. Not AEC-Q100 - choose ISO7741FQDWWQ1 for automotive-grade applications.
