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ISO7763FDWR
Texas Instruments
DGTL ISO 5000VRMS 6CH GP 16SOIC
100139 Pcs New Original In Stock
General Purpose Digital Isolator 5000Vrms 6 Channel 100Mbps 85kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
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ISO7763FDWR
Product Overview
1336688
DiGi Electronics Part Number
ISO7763FDWR-DGManufacturer
Texas Instruments
ISO7763FDWR
Description
DGTL ISO 5000VRMS 6CH GP 16SOICInventory
100139 Pcs New Original In Stock
General Purpose Digital Isolator 5000Vrms 6 Channel 100Mbps 85kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
Quantity
Minimum 1
Minimum 1
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ISO7763FDWR Technical Specifications
Category
Digital Isolators
Packaging
-
Series
ISO776x
Product Status
Active
Technology
Capacitive Coupling
Type
General Purpose
Isolated Power
No
Number of Channels
6
Inputs - Side 1/Side 2
3/3
Channel Type
Unidirectional
Voltage - Isolation
5000Vrms
Common Mode Transient Immunity (Min)
85kV/µs
Data Rate
100Mbps
Propagation Delay tpLH / tpHL (Max)
16ns, 16ns
Pulse Width Distortion (Max)
4.9ns
Rise / Fall Time (Typ)
1.1ns, 1.4ns
Voltage - Supply
2.25V ~ 5.5V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.295", 7.50mm Width)
Supplier Device Package
16-SOIC
Base Product Number
ISO7763
Datasheet & Documents
Manufacturer Product Page
ISO7763FDWR Specifications
HTML Datasheet
ISO7763FDWR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
2,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
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Frequently Asked Questions (FAQ)
Can the ISO7763FDWR safely replace an ADuM260N in a 5kVrms isolated industrial communication interface without redesigning the PCB layout or power supply?
The ISO7763FDWR can functionally replace the ADuM260N in many 5kVrms applications due to its similar channel count (6 channels, 3/3 split), voltage rating (5000Vrms), and SOIC-16 package. However, critical differences exist: the ISO7763FDWR uses capacitive isolation with higher CMTI (85kV/µs vs. ~25kV/µs for ADuM260N), which improves noise immunity in high-dV/dt environments, but it lacks integrated isolated power—unlike the ADuM260N, which includes an on-chip isoPower DC-DC converter. If your design relies on the ADuM260N’s internal isolated supply, you’ll need to add an external isolated DC-DC module (e.g., TI’s DCH010505) to power the secondary side of the ISO7763FDWR. Also, verify signal polarity and enable pin compatibility, as the ISO7763FDWR has no enable pins, while the ADuM260N does. Always re-validate EMI and creepage/clearance requirements post-swap.
What are the key reliability risks when using the ISO7763FDWR in a motor drive control board operating at 125°C ambient with frequent voltage transients above 50V/µs?
Operating the ISO7763FDWR at its maximum rated temperature (125°C) in a high-transient environment like a motor drive introduces two primary risks: accelerated aging of the SiO₂-based capacitive isolation barrier and potential CMTI margin erosion under sustained stress. While the ISO7763FDWR specifies 85kV/µs CMTI (min), real-world transients in IGBT/MOSFET switching can exceed 100V/µs locally due to parasitic inductance. To mitigate, ensure tight PCB layout with short return paths, use ground planes under isolation barriers, and add RC snubbers or TVS diodes near the isolator inputs. Additionally, derate the isolation voltage by 20% for long-term reliability at 125°C—TI’s qualification data supports this practice. Monitor for increased propagation delay drift over time, which can indicate barrier degradation.
How does the propagation delay matching of the ISO7763FDWR compare to the ISO7741FDW when synchronizing multiple PWM signals across an isolation barrier in a multi-phase power converter?
The ISO7763FDWR offers tighter intra-channel propagation delay matching (±4.9ns max pulse width distortion) compared to the quad-channel ISO7741FDW (±6ns PWD), making it better suited for synchronizing multiple PWM signals in multi-phase converters where phase alignment is critical. However, the ISO7763FDWR has six unidirectional channels (3/3), while the ISO7741FDW provides bidirectional capability per channel—important if feedback signals must cross the barrier in both directions. For pure forward PWM distribution (e.g., gate driver control), the ISO7763FDWR’s lower skew reduces timing mismatches between phases, improving current sharing and reducing harmonics. But if your design requires bidirectional communication (e.g., status telemetry), consider pairing the ISO7763FDWR with a separate low-speed isolator or switching to a mixed-channel device like the ISO7721FDW.
Is it safe to operate the ISO7763FDWR with 3.3V logic on one side and 5V logic on the other without level-shifting circuitry in a mixed-voltage automotive subsystem?
Yes, the ISO7763FDWR supports mixed-voltage operation (2.25V to 5.5V per side) and can directly interface 3.3V and 5V logic without external level shifters, thanks to its CMOS/TTL-compatible inputs and independent supply rails (VCC1 and VCC2). However, ensure that input signal levels respect the VIH/VIL thresholds relative to each side’s supply—e.g., a 3.3V input may not reliably meet VIH for a 5V-side receiver if noise margins are tight. TI recommends verifying logic thresholds under worst-case conditions (temperature, supply variation). Also, note that rise/fall times (typ. 1.1–1.4ns) may cause overshoot on slower 5V buses; use series termination resistors (22–100Ω) near the receiver if signal integrity issues arise. This feature simplifies BOM but demands careful layout to avoid ground bounce between domains.
What design precautions are necessary when placing the ISO7763FDWR near a high-frequency switching node (e.g., 2MHz buck converter) on the same PCB to avoid false triggering or data corruption?
When placing the ISO7763FDWR near a 2MHz switching node, prioritize isolation barrier integrity and minimize capacitive coupling. Maintain at least 8mm creepage distance between primary and secondary side traces (per IEC 60664-1 for 5000Vrms), and avoid routing high-dV/dt signals parallel to isolator pins—especially across the package edge. Use a solid ground plane beneath the device but split it cleanly along the isolation boundary to prevent return current crossover. Shield sensitive input lines with grounded guard traces, and keep input/output traces short and impedance-controlled. The ISO7763FDWR’s high CMTI (85kV/µs) helps reject common-mode noise, but differential noise from nearby switchers can still couple through parasitics. If errors persist, add small ferrite beads (e.g., 600Ω @ 100MHz) in series with input lines and 100pF bypass caps near VCC pins. Always validate with an eye diagram at full data rate under load.
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ISO7763FDWR CAD Models
Texas Instruments ISO7763FDWR PCB symbols & footprints
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