ISO7721
Digital IsolatorThe ISO7721 is a digital isolator from Texas Instruments. View the full ISO7721 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Digital Isolator
Overview
Part: ISO7720, ISO7721 — Texas Instruments
Type: High-Speed, Dual-Channel Digital Isolator
Description: High-performance, dual-channel digital isolator with up to 5000 VRMS isolation, 100 Mbps data rate, and robust EMC, offering 2.25 V to 5.5 V level translation and low power consumption.
Operating Conditions:
- Supply voltage: 2.25 V to 5.5 V
- Operating temperature: -55°C to +125°C
- Data rate: 100 Mbps
Absolute Maximum Ratings:
- Max isolation rating: 5000 VRMS (DW and DWV packages)
- Max surge capability: 12.8 kV
Key Specs:
- Data rate: 100 Mbps
- Isolation rating: Up to 5000 VRMS
- Surge capability: Up to 12.8 kV
- Common-Mode Transient Immunity (CMTI): ±100 kV/μs Typical
- Supply voltage range: 2.25 V to 5.5 V
- Power consumption: 1.7 mA per channel at 1 Mbps (typical)
- Propagation delay: 11 ns (typical)
- ESD protection (contact discharge): ±8 kV IEC 61000-4-2 across isolation barrier
Features:
- Robust isolation barrier with >30-Year projected lifetime at 1.5 kV RMS working voltage
- 2.25-V to 5.5-V level translation
- Default output High (ISO772x) and Low (ISO772xF) options
- Robust electromagnetic compatibility (EMC)
- Automotive Version Available: ISO772x-Q1
- Safety-Related Certifications: DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, IEC 62368-1, IEC 60601-1, GB 4943.1
Applications:
- Industrial automation
- Motor control
- Power supplies
- Solar inverters
- Medical equipment
Package:
- D (8) (4.90 mm × 3.91 mm)
- DWV (8) (5.85 mm × 7.50 mm)
- DW (16) (10.30 mm × 7.50 mm)
Features
- 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
Applications
Pin Configuration
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
Electrical Characteristics
VCC1 = VCC2 = 5 V ± 10% (over recommended operating conditions unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| V OH | High-level output voltage | I OH = -4 mA; see Figure 7-1 | V CCO - 0.4 (1) | 4.8 | V | |
| V OL | Low-level output voltage | I OL = 4 mA; see Figure 7-1 | 0.2 | 0.4 | V | |
| V IT+(IN) | Rising input threshold voltage | 0.6 x V CCI | 0.7 x V CCI (1) | V | ||
| V IT-(IN) | Falling input threshold voltage | 0.3 x V CCI | 0.4 x V CCI | V | ||
| V I(HYS) | Input threshold voltage hysteresis | 0.1 x V CCI | 0.2 x V CCI | V | ||
| I IH | High-level input current | V IH = V CCI (1) at INx | 10 | μA | ||
| I IL | Low-level input current | V IL = 0 V at INx | -10 | μA | ||
| CMTI | Common mode transient immunity | V I = V CCI or 0 V, V CM = 1200 V; see Figure 7-3 | 85 | 100 | kV/μs | |
| C I | Input Capacitance (2) | V I = V CC / 2 + 0.4×sin(2πft), f = 1 MHz, V CC = 5 V | 2 | pF |
Absolute Maximum Ratings
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| V CC1 , V CC2 | Supply voltage (2) | -0.5 | 6 | V |
| V | Voltage at INx, OUTx | -0.5 | V CCX + 0.5 (3) | V |
| I O | Output current | -15 | 15 | mA |
| T J | Junction temperature | 150 | °C | |
| T stg | Storage temperature | -65 | 150 | °C |
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.
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |||
|---|---|---|---|---|---|---|
| V CC1 , V CC2 (1) | Supply voltage | 2.25 | 5.5 | V | ||
| V CC(UVLO+) | UVLO threshold when supply voltage is rising | 2 | 2.25 | V | ||
| V CC(UVLO-) | UVLO threshold when supply voltage is falling | 1.7 | 1.8 | V | ||
| V HYS(UVLO) | Supply voltage UVLO hysteresis | 100 | 200 | mV | ||
| I OH | High level output current V CCO | = 5 V (2) -4 | -2 -1 | mA mA mA | ||
| I OL | Low level output current V CCO | = 5 V V CCO = 3.3 V V CCO = 2.5 V | 4 2 1 | mA mA mA | ||
| V IH | High level Input voltage | 0.7 x V CCI (2) | V CCI | V | ||
| V IL | Low level Input voltage | 0 | 0.3 x V | CCI | V | |
| DR (3) | Data Rate | 0 | 100 | Mbps | ||
| T A | Ambient temperature | -55 | 25 | 125 | °C |
Thermal Information
| ISO772x | ISO772x | ISO772x | ||
|---|---|---|---|---|
| THERMAL METRIC (1) | THERMAL METRIC (1) | DW (SOIC) | DWV (SOIC) | D (SOIC) |
| 16 PINS | 16 PINS | 8 PINS | ||
| R θJA | Junction-to-ambient thermal resistance | 86.5 | 84.3 | 137.7 |
| R θJC(top) | Junction-to-case (top) thermal resistance | 49.6 | 36.3 | 54.9 |
| R θJB | Junction-to-board thermal resistance | 49.7 | 47.0 | 71.7 |
| ψ JT | Junction-to-top characterization parameter | 32.3 | 7.4 | 7.1 |
| ψ JB | Junction-to-board characterization parameter | 49.2 | 45.1 | 70.7 |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | - | - | - |
Typical Application
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.
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