12

ICS1722

Figure 8: Open Circuit Reference Example

Power: VDD Pin

The power supply for the device must be connected to the VDD

pin. The voltage should be +5 VDC and should be supplied to the

part through a regulator that has good noise rejection and an

adequate current rating. The controller requires up to a maximum

Grounding: VSS Pin

This pin must have a direct connection to a solid ground plane.

Table 5: Absolute Maximum Ratings

Data Tables

+ 5 V

R4 = 1.3k

R3 = 2.2k

R1 = 10k

R2 = 2k

6 cells

+

-

VIN =

OPREF = 1.86V

current source

(open circuit voltage = 12V)

{

1.60V (battery present)

2.00V (no battery)

(9.6 V)

Resistor divider at the OPREF pin

Resistor divider at the VIN pin

Supply Voltage

6.5

V

Logic Input Levels

-0.5 to V

V

Ambient Operating Temperature

0 to 70

Storage Temperature

-55 to 150

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only.

Functional operation of the device at the Absolute Maximum Ratings or other conditions not consistent with the characteristics shown in this

document is not recommended. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.