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ISO7310FCD
Texas Instruments
DGTL ISO 3000VRMS 1CH GP 8SOIC
255342 Pcs New Original In Stock
General Purpose Digital Isolator 3000Vrms 1 Channel 25Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
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ISO7310FCD
Product Overview
1352901
DiGi Electronics Part Number
ISO7310FCD-DGManufacturer
Texas Instruments
ISO7310FCD
Description
DGTL ISO 3000VRMS 1CH GP 8SOICInventory
255342 Pcs New Original In Stock
General Purpose Digital Isolator 3000Vrms 1 Channel 25Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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ISO7310FCD Technical Specifications
Category
Digital Isolators
Packaging
-
Series
-
Product Status
Active
Technology
Capacitive Coupling
Type
General Purpose
Isolated Power
No
Number of Channels
1
Inputs - Side 1/Side 2
1/0
Channel Type
Unidirectional
Voltage - Isolation
3000Vrms
Common Mode Transient Immunity (Min)
25kV/µs
Data Rate
25Mbps
Propagation Delay tpLH / tpHL (Max)
58ns, 58ns
Pulse Width Distortion (Max)
4ns
Rise / Fall Time (Typ)
2.5ns, 2ns
Voltage - Supply
3V ~ 5.5V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
ISO7310
Datasheet & Documents
Manufacturer Product Page
ISO7310FCD Specifications
HTML Datasheet
ISO7310FCD-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
Other Names
TEXTISISO7310FCD
2156-ISO7310FCD
Standard Package
75
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Their reliable after-sales service enhances our overall satisfaction.
de desembre 02, 2025
Simple and clear return and warranty procedures reflect their dedication to customer convenience.
de desembre 02, 2025
The quick loading pages and prompt delivery process truly impressed me.
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Frequently Asked Questions (FAQ)
What are the key design risks when integrating the ISO7310FCD into a high-noise industrial environment with fast transients?
When integrating the ISO7310FCD in high-noise environments, the primary risk lies in exceeding the device's common mode transient immunity (CMTI) margin despite its robust 25kV/µs rating. Fast transients from motor drives or relay switching can induce timing errors if ground shifts occur across isolation boundaries. To mitigate this, ensure low-impedance PCB layout with minimized trace lengths on isolated sides, proper use of 0.1µF ceramic bypass capacitors close to VDD pins, and guard rings around isolated signal lines. Additionally, maintain clean split ground planes with adequate creepage (≥6mm) and clearance (≥3mm) to leverage the full 3000Vrms isolation rating safely. Avoid routing noisy signals parallel to ISO7310FCD's input channel to prevent capacitive coupling that could affect signal integrity at 25Mbps operation.
Can the ISO7310FCD replace the SI8710CD-B-ISR in an existing design, and what are the critical compatibility considerations?
Yes, the ISO7310FCD can replace the SI8710CD-B-ISR in most unidirectional single-channel applications, but key differences must be addressed. Both support 3V–5.5V supplies and offer similar 3000Vrms isolation, but the ISO7310FCD uses capacitive coupling versus the Si8710's LED-based technology, resulting in lower power consumption and better CMTI (25kV/µs vs ~15kV/µs). However, the Si8710CD-B-ISR includes integrated current limiting and behaves more like an optocoupler, so upstream drive circuitry designed for LED inputs may need adjustment. Check that your input source can drive the ISO7310FCD’s CMOS-compatible input (typically 3.3V or 5V logic) instead of a current-mode opto input. Also verify timing: ISO7310FCD has faster propagation (58ns max) and narrower pulse width distortion (4ns max), which improves timing margins but may expose downstream setup/hold issues previously masked by slower opto response.
How does the ISO7310FCD perform in high-temperature automotive applications near 125°C, and are there reliability concerns?
The ISO7310FCD is rated for operation up to 125°C ambient, making it suitable for under-hood automotive systems, but thermal management is crucial for long-term reliability. At high temperatures, CMTI performance can degrade marginally, and aging effects on the internal SiO2 capacitive insulation layer may accelerate over time. To ensure reliability, limit junction temperature (Tj) by minimizing ambient heat sources, avoiding enclosed spaces without airflow, and using thermal vias under exposed pads if present (though ISO7310FCD lacks a thermal pad). Operate within 80–90% of rated voltage stress and perform lifetime stress testing per AEC-Q100 guidelines if used in automotive systems. Also, ensure supply regulation remains stable across temperature, as VDD noise increases at high temp and can impact signal integrity at 25Mbps.
What are the signal integrity trade-offs when running the ISO7310FCD at its maximum 25Mbps data rate in a motor control encoder interface?
Running the ISO7310FCD at 25Mbps in motor control feedback paths introduces timing and distortion trade-offs that can affect system accuracy. While the device supports this rate with low typical rise/fall times (2.5ns/2ns), the max propagation delay of 58ns and pulse width distortion of 4ns can accumulate in multi-isolator systems, reducing timing margin in fast PWM control loops. Use slow slew-rate inputs to reduce EMI but verify they meet the ISO7310FCD's minimum input transition specifications. Avoid long PCB traces that act as antennas; instead, use controlled-impedance routing or series termination near the driver. Also, consider that unidirectional configuration means bidirectional encoder protocols need external circuitry or a different isolator like ISO7721. Always validate timing budgets including microcontroller delays and gate drive propagation.
Is the ISO7310FCD safe to use as a drop-in replacement for the ISO7310CD, and what are the differences that affect field reliability?
Yes, the ISO7310FCD is a direct pin-to-pin and functionally compatible replacement for the ISO7310CD, both being single-channel, unidirectional, capacitive isolators from TI with 3000Vrms isolation and 25Mbps speed. The 'F' in ISO7310FCD indicates enhanced manufacturability and improved process control, resulting in tighter CMTI distribution and better long-term reliability under repetitive voltage stress. While both meet the same specs, the FCD variant typically exhibits lower defect rates in high-reliability applications due to updated process nodes. No PCB or firmware changes are needed during replacement. However, verify that the original ISO7310CD was not operating near thermal or EMI limits, as the improved performance of the FCD version may expose latent noise coupling or timing issues previously masked by slower or less consistent behavior.
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ISO7310FCD CAD Models
Texas Instruments ISO7310FCD PCB symbols & footprints
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