ISO7340C_15 datasheet(21/34 Pages) TI

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ISO7340

INA

INB

INC

IND

OUTA

OUTB

OUTC

OUTD

GND2

VCC2

0.1 µF

2 mm max

from VCC2

GND2

GND1

2 mm max

from VCC1

GND1

0.1 µF

VCC1

ISO7341

INA

INB

INC

OUTD

OUTA

OUTB

OUTC

IND

GND2

VCC2

0.1 µF

2 mm max

from VCC2

EN2

GND2

EN1

GND1

2 mm max

from VCC1

GND1

0.1 µF

VCC1

ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC

www.ti.com

SLLSEI6E – SEPTEMBER 2014 – REVISED APRIL 2015

Typical Application (continued)

9.2.1.1 Design Requirements

9.2.1.1.1

Typical Supply Current Equations

9.2.1.1.1.1

ISO7340

At VCC1 = VCC2 = 5 V

ICC1 = 0.54366 + (0.0873 x f)

(1)

ICC2 = 2.74567 + (0.08433 x f) + (0.01 x f x CL)

(2)

At VCC1 = VCC2 = 3.3 V

ICC1 = 0.3437 + (0.04922 x f)

(3)

ICC2 = 2.1068 + (0.04374 x f) + (0.007045 x f x CL)

(4)

9.2.1.1.1.2

ISO7341

At VCC1 = VCC2 = 5 V

ICC1 = 1.7403 + (0.1006 x f) + (0.001711 x f x CL)

(5)

ICC2 = 2.502 + (0.09629 x f) + (0.00687 x f x CL)

(6)

At VCC1 = VCC2 = 3.3 V

ICC1 = 1.2915 + (0.046 x f) + (0.00185 x f x CL)

(7)

ICC2 = 1.8833 + (0.0566 x f) + (0.004514 x f x CL)

(8)

9.2.1.1.1.3

ISO7342

At VCC1 = VCC2 = 5 V

ICC1, ICC2 = 2.1254 + (0.08694 x f) + (0.004868 x f x CL)

(9)

At VCC1 = VCC2 = 3.3 V

ICC1, ICC2 = 1.5912 + (0.0410 x f) + (0.003785 x f x CL)

(10)

ICC1 and ICC2 are typical supply currents measured in mA, f is data rate measured in Mbps, CL is the capacitive

load measured in pF.

9.2.1.2 Detailed Design Procedure

Unlike optocouplers, which need external components to improve performance, provide bias, or limit current,

ISO734x only needs two external bypass capacitors to operate.

Figure 21. Typical ISO7340 Circuit Hook-up

Figure 22. Typical ISO7341 Circuit Hook-up

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Product Folder Links: ISO7340C ISO7340FC ISO7341C ISO7341FC ISO7342C ISO7342FC

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