13

9123B–AUTO–07/09

ATA6871 [Preliminary]

7.4

ATA6871 Configuration

7.4.1

Device Position

The ATA6871 can be cascaded up to 16 times in one string. The input pins CHIPONE and

CHIPLAST define the first and the last IC in a string.

7.4.2

Number of Cells Configuration

The ATA6871 can work with either four, five, or six cells. This can be programmed with the input

pins CONF0 and CONF1. When used with 5 cells, the inputs MBAT5 and 6 must be connected

together, when used with 4 cells the inputs MBAT4, MBAT5 and MBAT6 must be connected

together (see also Figure 7-3 to Figure 7-5).

Table 7-5.

Electrical Characteristics

No.

Parameters

Test Conditions

Pin

Symbol

Min.

Typ.

Max.

Unit

Type*

4.1

Overtemperature

detection on threshold

TEMP_IN

V

TEMP_IN

VDD/2 –

100 mV

VDD/2

VDD/2 +

100 mV

VA

4.2

Overtemperature

detection off threshold

TEMP_IN

VDD/2 –

50 mV

VDD/2 +

50 mV

VDD/2 +

150 mV

VA

4.3

Overtemperature

detection hysteresis

TEMP_IN

ΔV

TEMP_IN

30

mV

A

4.4

Resistor Divider

R

3

1000

k

Ω

D

4.5

Input Current

V

TEMP_IN

I

TEMP_IN

0.4

0.6

µA

A

4.6

Debouncing Time

t

Debounce

13

s

A

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

Table 7-6.

Device Position

CHIPONE

CHIPLAST

Configuration

0

0

ICs between the first and the last IC (up to 14 ICs)

0

1

Last cascaded chip, connected to power down optocoupler

1

0

First chip in a string (master)

1

1

First and last chip: (if only one IC is used per string)

Table 7-7.

Cells Configuration

CONF1

CONF0

Configuration

Notes

0

0

4 cells configuration

Over/undervoltage comparators

between MBAT4,5 and MBAT6 are

disabled

0

1

5 cells configuration

Over/undervoltage comparator

between MBAT5 and MBAT6 is

disabled

1

0

Do not use, reserved for test purposes

1

1

6 cells configuration