ISO7721

Part: ISO7721 (ISO7720, ISO7721, ISO7721F, ISO7721B, ISO7721FB) — Texas Instruments

Type: Dual-Channel Digital Isolator

Description: High-speed, dual-channel reinforced/basic digital isolator with a 2.25–5.5 V supply range, 100 Mbps data rate, up to 5000 VRMS isolation rating, and 11 ns typical propagation delay.

Operating Conditions:

• Supply voltage (VCC1, VCC2): 2.25–5.5 V
• Operating ambient temperature: -55 to 125 °C
• Data rate: 0 to 100 Mbps
• Output current: IOH up to -4 mA and IOL up to 4 mA at VCCO = 5 V

Absolute Maximum Ratings:

• Max supply voltage (VCC1, VCC2): 6 V
• Voltage at INx, OUTx: -0.5 V to VCCX + 0.5 V (must not exceed 6 V)
• Output current (IO): ±15 mA
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Data rate: 100 Mbps
• Propagation delay: 11 ns typical
• Supply current: 1.7 mA per channel typical at 1 Mbps
• CMTI: ±100 kV/μs typical
• Isolation rating: up to 5000 VRMS (DW, DWV packages) and 3000 VRMS (D package) per UL 1577
• Surge capability: up to 12.8 kV
• ESD protection across the isolation barrier: ±8 kV IEC 61000-4-2 contact discharge
• UVLO: rising threshold 2.25 V max, falling threshold 1.7 V min, hysteresis 100 mV min

Features:

• Projected lifetime over 30 years at 1.5 kV RMS working voltage
• 2.25 V to 5.5 V level translation
• Default output high (ISO772x) or low (ISO772xF) options
• ISO7720 has both channels in the same direction; ISO7721 has the channels in opposite directions
• Robust EMC: system-level ESD, EFT and surge immunity, low emissions
• Safety certifications: DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, IEC 62368-1, IEC 60601-1, GB 4943.1
• Automotive version available: ISO772x-Q1
• ISO7721B and ISO7721FB are basic-insulation versions

Applications:

• Industrial automation
• Motor control
• Power supplies
• Solar inverters
• Medical equipment

Package:

• D (8), narrow-body SOIC: 4.90 mm × 3.91 mm
• DWV (8), wide-body SOIC: 5.85 mm × 7.50 mm
• DW (16), wide-body SOIC: 10.30 mm × 7.50 mm

• 100 Mbps data rate
• Robust isolation barrier:
• ->30-Year projected lifetime at 1.5 kV RMS working voltage
• -Up to 5000 VRMS Isolation Rating
• -Up to 12.8 kV surge capability
• -±100 kV/μs Typical CMTI
• Wide supply range: 2.25 V to 5.5 V
• 2.25-V to 5.5-V level translation
• Default output High (ISO772x) and Low (ISO772xF) Options
• Wide temperature range: -55°C to +125°C
• Low power consumption, typical 1.7 mA per channel at 1 Mbps
• Low propagation delay: 11 ns typical
• Robust electromagnetic compatibility (EMC)
• -System-Level ESD, EFT, and surge immunity
• -±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier
• -Low emissions
• Wide-SOIC (DW-16, DWV-8) and Narrow-SOIC (D-8) package options
• Automotive Version Available: ISO772x-Q1
• Safety-Related Certifications
• -DIN EN IEC 60747-17 (VDE 0884-17)
• -UL 1577 component recognition program
• -IEC 61010-1, IEC 62368-1, IEC 60601-1, and GB 4943.1 certifications

• Industrial automation
• Motor control
• Power supplies
• Solar inverters
• Medical equipment

Figure 5-1. ISO7720 DW Package 16-Pin SOIC Top View

Figure 5-2. ISO7721 DW Package 16-Pin SOIC Top View

Figure 5-3. ISO7720 D and DWV Package 8-Pin SOIC Top View

Figure 5-4. ISO7721 D and DWV Package 8-Pin SOIC Top View

VCC1 = VCC2 = 5 V ± 10% (over recommended operating conditions unless otherwise noted)

See (1)

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

• (2) All voltage values except differential I/O bus voltages are with respect to the local ground terminal (GND1 or GND2) and are peak voltage values
• (3) Maximum voltage must not exceed 6 V.

over operating free-air temperature range (unless otherwise noted)

The ISO772x devices are high-performance, dual-channel digital isolators. The devices use single-ended CMOS-logic switching technology. The supply voltage range is from 2.25 V to 5.5 V for both supplies, V CC1 and VCC2. When designing with digital isolators, keep in mind that because of the single-ended design structure, digital isolators do not conform to any specific interface standard and are only intended for isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed between the data controller (that is, μC or UART), and a data converter or a line transceiver, regardless of the interface type or standard.