Atmel ATA6264 - Manual (Page 59)

59
4929B–AUTO–01/07
ATA6264 [Preliminary]
Figure 18-1. Functional Principle of the IASG Interface
Necessary for operation:
V
VCORE
and V
VPERI
> Reset threshold, V
EVZ
= 9V to 40V for operation with IASGx switched to 5V
V
VCORE
and V
VPERI
> Reset threshold, V
EVZ
= 15V to 40V for operation with IASGx switched to 10V
V
INT
= 3.7V to 5.47V, V
CP
> V
EVZ
+ 7V
Operating conditions of all other supply pins:
V
K30
and V
VSAT
are within functional range limits, T
j
= –40°C to 150°C
Other pins:
A s d e f i n e d i n
S e c t i o n 4 . ” F u n c t i o n a l R a n g e ” o n p a g e 8 , C
I A S G x
≥
1 0 n F a n d
825
Ω ≥
R
ISENS
≥
5 k
Ω
Serial
interface
Serial
interface
UZP
Current mirror
Serial
interface
Analog
multiplexer
Short circuit
protection
10
15
IASGx
C > 10 pF
RIASGx
I = f(R)
I/10
or
I/15
ISENS
Resistive
sensor
Current limit
if V
ISENS
>V
PERI
V
V1
V
V2
1
1
-
+
R
ISENS