ISO7420FE Datasheet, PDF (9/19 Pages) Texas Instruments – Low-Power Dual Channel Digital Isolators

ISO7420E, ISO7420FE
ISO7421E, ISO7421FE
www.ti.com
SLLSE45B – DECEMBER 2010 – REVISED JANUARY 2011
DEVICE INFORMATION
IEC INSULATION AND SAFETY-RELATED SPECIFICATIONS FOR THE D-8 PACKAGE
over recommended operating conditions (unless otherwise noted)
L(I01)
L(I02)
CTI
R_IO
C_IO
C_I
PARAMETER
Minimum air gap (clearance)
Minimum external tracking
(creepage)
Tracking resistance (comparative
tracking index)
Minimum internal gap (internal
clearance)
Isolation resistance, input to
output ⁽¹⁾
Barrier capacitance, input to
output ⁽¹⁾
Input capacitance⁽²⁾
TEST CONDITIONS
Shortest terminal-to-terminal distance through air
Shortest terminal-to-terminal distance across the
package surface
DIN IEC 60112 / VDE 0303 Part 1
Distance through the insulation
V_IO = 500 V, T_A < 100°C
V_IO = 500 V, 100°C ≤ T_A ≤ max
V_IO = 0.4 sin (2pft), f = 1 MHz
V_I = V_CC/2 + 0.4 sin (2pft), f = 1 MHz, V_CC = 5 V
(1) All pins on each side of the barrier tied together creating a two-terminal device.
(2) Measured from input pin to ground.
MIN TYP MAX UNIT
4.8
mm
4.3
mm
>400
V
0.014
mm
>10¹²
Ω
>10¹¹
Ω
1
pF
1
pF
NOTE
Creepage and clearance requirements should be applied according to the specific
equipment isolation standards of an application. Care should be taken to maintain the
creepage and clearance distance of a board design to ensure that the mounting pads of
the isolator on the printed-circuit board do not reduce this distance.
Creepage and clearance on a printed-circuit board become equal according to the
measurement techniques shown in the Isolation Glossary. Techniques such as inserting
grooves and/or ribs on a printed circuit board are used to help increase these
specifications.
INSULATION CHARACTERISTICS⁽³⁾
over recommended operating conditions (unless otherwise noted)
V_IORM
V_PR
V_IOTM
V_ISO
R_S
PARAMETER
Maximum working insulation voltage
Input-to-output test voltage per IEC
60747-5-2
Transient overvoltage per IEC 60747-5-2
Isolation voltage per UL
Insulation resistance
Pollution degree
TEST CONDITIONS
Method a, After environmental tests subgroup 1,
V_PR = V_IORM x 1.6, t = 10 s,
Partial Discharge < 5 pC
Method b1,
V_PR = V_IORM x 1.875, t = 1 s (100% Production test)
Partial discharge < 5 pC
After Input/Output safety test subgroup 2/3,
V_PR = V_IORM x 1.2, t = 10 s,
Partial discharge < 5 pC
V_TEST = V_IOTM
t = 60 sec (qualification)
t= 1 sec (100% production)
V_TEST = V_ISO, t = 60 sec (qualification)
V_TEST = 1.2 x V_ISO, t = 1 sec (100% production)
V_IO = 500 V at T_S
(3) Climatic Classification 40/125/21
SPECIFICATION
560
896
1050
672
4000
2500
3000
>10⁹
2
UNIT
V_PEAK
V_PEAK
V_PEAK
V_RMS
Ω
Copyright © 2010–2011, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Link(s): ISO7420E, ISO7420FE ISO7421E, ISO7421FE