SLLA284G July   2022  – September 2023 ISO5451 , ISO5452 , ISO5851 , ISO5852S , ISO7142CC , ISO7142CC-Q1 , ISO721 , ISO721-Q1 , ISO721M , ISO721M-EP , ISO722 , ISO7220A , ISO7220M , ISO7221A , ISO7221B , ISO7221C , ISO7221M , ISO722M , ISO7230A , ISO7230C , ISO7230M , ISO7231A , ISO7231C , ISO7231M , ISO7240A , ISO7240C , ISO7240CF , ISO7240M , ISO7241A , ISO7241C , ISO7241M , ISO7242A , ISO7242C , ISO7242M , ISO7310-Q1 , ISO7310C , ISO7340-Q1 , ISO7340C , ISO7340FC , ISO7341-Q1 , ISO7341C , ISO7341FC , ISO7342-Q1 , ISO7342C , ISO7342FC , ISO7740 , ISO7741 , ISO7742 , ISO7760 , ISO7761 , ISO7762 , ISO7810 , ISO7820 , ISO7821 , ISO7830 , ISO7831 , ISO7840 , ISO7841 , ISO7842

 

  1.   1
  2.   Digital Isolator Design Guide
  3.   Trademarks
  4. 1Operating Principle
    1. 1.1 Edge-Based Communication
    2. 1.2 On-Off Keying (OOK) Based Communication
  5. 2Typical Applications for Digital Isolators and Isolated Functions
  6. 3Digital Isolator Selection Guide
    1. 3.1 Parameters of Interest
    2. 3.2 Isolator Families
  7. 4PCB Design Guidelines
    1. 4.1 PCB Material
    2. 4.2 Layer Stack
    3. 4.3 Creepage Distance
    4. 4.4 Controlled Impedance Transmission Lines
    5. 4.5 Reference Planes
    6. 4.6 Routing
    7. 4.7 Vias
    8. 4.8 Decoupling Capacitors
  8. 5Summary
  9. 6References
  10. 7Revision History

3.2 Isolator Families

Table 3-1 briefly describes the key features of a few digital isolator families and isolated functions from TI. For a more exhaustive listing of devices please visit:
http://www.ti.com/lsds/ti/analog/isolators/overview.page

Table 3-1 Digital Isolator Families and Isolated Functions
Isolator TypeDeviceIsolation PerformanceTiming PerformanceCMTIPackagePower per Channel
(5 typ, 1Mbps)

Digital Isolator

ISO67xx

VIOTM = 7071 Vpk
VIORM = 2121 Vpk
Surge = 10 kV		Data rate = 50Mbps
Prop delay = 11 ns typ
Skew = 6ns max
Glitch filter not required

150

kV/µs typ
100 kV/µs min		CTI > 600
16-SOIC, CTI > 400 8-SOIC

1.8 mA

Digital IsolatorISO78xxVIOTM = 8000 Vpk
VIORM = 2121 Vpk
Surge = 12.8 kV		Data rate = 100Mbps
Prop delay = 11 ns typ
Skew = 2.5 ns max
Glitch filter not required		100 kV/µs minCTI > 600
16-SOIC		1.7 mA
Digital IsolatorISO77xxVIOTM = 8000 Vpk
VIORM = 2121 Vpk
Surge = 12.8 kV		Data rate = 100Mbps
Prop delay = 10.7 ns typ
Skew = 4.1 ns max
Glitch filter not required		100 kV/µs typ
85 kV/µs min		CTI > 600
16-SOIC, 8-SOIC,
16-SSOP		1.4 mA

Digital Isolator

ISO70xx

VIOTM = 4000 Vpk
VIORM = 566 Vpk
Surge = 6.4 kV		Data rate = 4Mbps
Prop delay = 140 ns typ
Skew = 10ns max
Glitch filter not required		100 kV/µs typ
50 kV/µs min		CTI > 600
8-SOIC,
16-SSOP

0.116 mA

Digital IsolatorISO73xxVIOTM = 4242 Vpk
VIORM = 1414 Vpk
Surge = 6 kV		Data rate = 25Mbps
Prop delay = 35 ns typ
Skew = 3 ns max
Integrated glitch filter		50 kV/µs typ
25 kV/µs min		400 < CTI < 600
8-SOIC,
16-SOIC		1.1 mA (5 V)
0.85 mA (3.3 V)
Digital IsolatorISO71xxVIOTM = 4242 Vpk
VIORM = 566 Vpk
Surge = 4 kV		Data rate = 50Mbps
Prop delay = 21 ns typ
Skew = 2 ns max
Integrated glitch filter		50 kV/µs typ
25 kV/µs min		400 < CTI < 600
16-QSOP		1.65 mA (5 V)
1.3 mA (3.3 V)
Isolated CANISO1042
ISO1044		VIOTM = 7071, 4242 Vpk
VIORM = 1500, 637 Vpk
Surge = 8, 10 kV		Loop delay = 150 ns typ100 kV/µs typ
85 kV/µs min		CTI > 600
16-SOIC, 8-SOIC		State dependent
Isolated RS-485ISO14xx
ISO1500		VIOTM = 7071, 4242 Vpk
VIORM = 1500, 566 Vpk
Surge = 10 kV		Prop delay = 19 to 310 ns100 kV/µs typ
85 kV/µs min		CTI > 600
16-SOIC, 8-SOIC		State dependent
Isolated I2CISO16xxVIOTM = 7071, 4242 Vpk
VIORM = 2121, 637 Vpk
Surge = 10, 6.5 kV		Clock freq max = 1.7 Mbps, GPIO data rate = 50 Mbps
Loop delay = 84 ns typ		100 kV/µs typ
50 kV/µs min		CTI > 600
16-SOIC, CTI > 400 8-SOIC		State dependent

Isolated Digital Input

ISO121x

VIOTM = 3600 Vpk
VIORM = 566 Vpk
Surge = 5.2 kV		Prop delay = 110 ns70 kV/µs typ
25 kV/µs min		CTI > 600
8-SOIC,
16-SSOP

Current limit dependent

Digital Isolator with Power

ISOW77xx

VIOTM = 7071 Vpk
VIORM = 1500 Vpk
Surge = 10kV		Prop delay = 11 ns100 kV/µs typ
85 kV/µs min		CTI > 600
16-SOIC

5 mA

Digital Isolator with Power and CAN

ISOW1044

VIOTM = 7071 Vpk
VIORM = 1500 Vpk
Surge = 10kV		Loop delay = 150 ns typ100 kV/µs typ
85 kV/µs min		CTI > 600
20-DFM		State dependent
Digital Isolator with Power and

RS-485

ISOW14xx

VIOTM = 7071 Vpk
VIORM = 1500 Vpk
Surge = 10kV		Prop delay = 49 to 450 ns100 kV/µs typ
85 kV/µs min		CTI > 600
20-DFM		State dependent