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ISO7221MDR
Texas Instruments
DGTL ISO 2500VRMS 2CH GP 8SOIC
5900 Pcs New Original In Stock
General Purpose Digital Isolator 2500Vrms 2 Channel 150Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
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5.0 / 5.0
- (209 Ratings)
ISO7221MDR
Product Overview
1341579
DiGi Electronics Part Number
ISO7221MDR-DGManufacturer
Texas Instruments
ISO7221MDR
Description
DGTL ISO 2500VRMS 2CH GP 8SOICInventory
5900 Pcs New Original In Stock
General Purpose Digital Isolator 2500Vrms 2 Channel 150Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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ISO7221MDR Technical Specifications
Category
Digital Isolators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Technology
Capacitive Coupling
Type
General Purpose
Isolated Power
No
Number of Channels
2
Inputs - Side 1/Side 2
1/1
Channel Type
Unidirectional
Voltage - Isolation
2500Vrms
Common Mode Transient Immunity (Min)
25kV/µs
Data Rate
150Mbps
Propagation Delay tpLH / tpHL (Max)
16ns, 16ns
Pulse Width Distortion (Max)
1ns
Rise / Fall Time (Typ)
1ns, 1ns
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
ISO7221
Datasheet & Documents
Manufacturer Product Page
ISO7221MDR Specifications
HTML Datasheet
ISO7221MDR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
-296-21957-1
296-21957-1-NDR
296-21957-2-NDR
-ISO7221MDRG4
296-21957-1
-296-21957-1-DG
296-21957-6-NDR
296-21957-2
-ISO7221MDR-NDR
-ISO7221MDRG4-NDR
296-21957-6
-296-21957-1-NDR
Standard Package
2,500
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
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UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
배송 전날까지도 주문 상황을 실시간으로 확인할 수 있어서 안심하고 기다릴 수 있었어요.
de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
Their transparent pricing model and secure packaging reflect their professionalism and customer focus.
de desembre 02, 2025
I appreciate their attention to packaging detail, ensuring my products arrive perfect.
de desembre 02, 2025
Their team is incredibly responsive and well-informed, making every interaction pleasant.
de desembre 02, 2025
I highly recommend their products for their excellent packaging and cost advantages.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the ISO7221MDR in high-noise industrial environments, and how can CMTI performance affect system reliability?
When integrating the ISO7221MDR into noisy industrial systems—such as motor drives or power inverters—its 25kV/µs minimum Common Mode Transient Immunity (CMTI) is critical for maintaining signal integrity across the isolation barrier. A key risk is misinterpreting fast transient spikes (e.g., from switching power supplies) as valid logic signals, potentially causing latch-up or false triggering. To mitigate this, ensure tight PCB layout practices: minimize trace length between the isolator and MCU, use a solid ground plane on each side, and place 100nF decoupling capacitors within 5mm of each supply pin. The ISO7221MDR’s capacitive coupling technology inherently resists magnetic field interference better than inductive alternatives, but proper bypassing is essential to fully leverage its CMTI rating under real-world conditions.
Can I replace an ADUM1201ARZ with the ISO7221MDR in an existing design, and what layout or supply voltage considerations should I evaluate?
Yes, the ISO7221MDR is a viable pin-compatible alternative to the ADUM1201ARZ in most bidirectional signal-isolated applications, but careful attention is needed due to differences in internal architecture. While both are 2-channel unidirectional isolators in 8-SOIC packages, the ISO7221MDR uses capacitive coupling versus Analog Devices’ magnetics. This affects performance under fast common-mode transients—verify your system’s noise profile aligns with the ISO7221MDR’s 25kV/µs CMTI spec. Additionally, confirm that your 3.3V or 5V supply rails are stable within the ISO7221MDR’s 3V–5.5V range; unlike some ADUM variants, it lacks integrated fail-safe output logic, so consider external pullups if floating outputs could risk downstream logic states during power-up.
How does the ISO7221MDR handle signal integrity at maximum data rates of 150Mbps, and what PCB design practices prevent timing errors?
To reliably achieve the ISO7221MDR’s 150Mbps data rate without bit errors, focus on minimizing inter-channel skew and reducing parasitic capacitance in the signal path. Keep input and output traces symmetrical and unterminated unless driving long cables—excessive series resistance can distort edges. Use controlled impedance routing if trace lengths exceed 5cm to prevent ringing, especially since the ISO7221MDR has fast 1ns typical rise/fall times. Also, ensure supply noise is below 100mVpp; noisy rails can increase propagation delay variation (max 16ns) and pulse width distortion (1ns max), potentially violating setup/hold times in high-speed SPI or encoder interfaces. Simulate or prototype with worst-case process corners before full deployment.
What thermal and long-term reliability factors should be considered when deploying the ISO7221MDR in extended temperature applications up to 125°C?
Operating the ISO7221MDR at its maximum 125°C junction temperature requires attention to power dissipation and PCB thermal management. Although the device draws low quiescent current, sustained 150Mbps operation increases Icc, raising die temperature—especially in enclosed or high-ambient environments. Use thermal vias under the exposed pad (if present) and connect to ground planes for heat dissipation. Given its MSL-1 rating, the ISO7221MDR is safe from moisture-related failures during reflow, but avoid repeated thermal cycling beyond manufacturer limits to prevent solder joint fatigue. For mission-critical systems, perform HTOL (High Temperature Operating Life) burn-in testing on a sample lot to detect early-life failures, as capacitive isolators can exhibit degradation in oxide layers under prolonged high-voltage stress.
How does the lack of isolated power in the ISO7221MDR impact system-level design, and what are the safest ways to combine it with isolated DC-DC converters?
Since the ISO7221MDR does not include isolated power, a separate isolated DC-DC converter (e.g., TI’s DCP0201 or Murata’s NMF0505SC) is required to power the secondary-side circuitry, creating potential noise coupling risks. Improper integration can negate the isolator’s 2500Vrms insulation rating. To maintain safety and signal fidelity, place the DC-DC converter close to the ISO7221MDR and filter its output with a pi-filter (ferrite bead + dual 10µF/100nF capacitors). Ensure creepage and clearance distances exceed 8mm across the isolation boundary, particularly when using converters with higher internal EMI. Also, avoid sharing input supply planes between the isolator’s primary side and noise sources like switch-mode regulators; use linear regulators (LDOs) if necessary to reduce conducted noise into the ISO7221MDR’s VCC1 pin.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ISO7221MDR CAD Models
Texas Instruments ISO7221MDR PCB symbols & footprints
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