L9780 datasheet(53/56 Pages) STMICROELECTRONICS

Teilenummer	L9780

Bauteilbeschribung	Wide range air fuel sensor control interface

PDF	56 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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DocID026356 Rev 3

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L9780

Application circuit

Figure 13. Sensor circuit

Sensors value:

Sensor D: Rout = 301 Ω typ, Rtg = 0 Ω, TAG resistor

 596 Ω;

Sensor B: Rout = 61.9 Ω typ, Rtg = 0 Ω, TAG resistor

 113 Ω;

Sensor N: Rout = 137 Ω typ, Rtg = 221 Ω typ, TAG resistor

 408 Ω.

RRCT22

kΩ

CGND

RSR

kΩ

RHD

7.5

kΩ

CFL(2)

470

CCP(2)

-1

μF

CFVOUT

0.1

100

RFVOUT

7.5

kΩ

CFV

4.7

μF

1. Not defined external components have values depending on the kind of sensor that has to be managed (as

for compensation network components or VCCS external resistors) or depending on the value defined by

the user (like for CL voltage dividers). TST pins have to be left open.

2. It is recommended to use ceramic capacitances and place them as close as possible to the part.

Table 19. External components value (continued)

Parameter(1)

Min.

Typ.

Max.

Unit

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