DS2786 Standalone OCV-Based Fuel Gauge

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Note 1:

Note 2:

Offset specified after auto-calibration cycle and Current Offset Bias Register = 00h.

Note 3:

Note 4:

Timing must be fast enough to prevent the DS2786 from entering Sleep mode due to bus low for period

Note 5:

Note 6:

signal.

Note 7:

the SCL signal) to bridge the undefined region of the falling edge of SCL.

Note 8:

Filters on SDA and SCL suppress noise spikes at the input buffers and delay the sampling instant.

Note 9:

Figure 1. 2-Wire Bus Timing Diagram

PIN DESCRIPTION

PIN

NAME

FUNCTION

1

AIN1

Aux Voltage Input Number 1

2

AIN0

Aux Voltage Input Number 0

3

SCL

Serial Clock Input.

Input only 2-wire clock line. Connect this pin to the clock signal of the

2-wire interface. This pin has a 0.2µA typical pulldown to sense disconnection.

4

SDA

Serial Data Input/Output.

Open drain 2-wire data line. Connect this pin to the clock

signal of the 2-wire interface. This pin has a 0.2µA typical pulldown to sense

disconnection.

5

SNS

Current-Sense Input.

Connect to the handset side of the sense resistor.

6

Device Ground.

Connect to the battery side of the sense resistor.

7

EEPROM Programming Voltage Input.

Connect to external supply for production

8

Voltage Out.

Supply for Aux Input Voltage Measurement Dividers. Connect to high side

of resistor divider circuits.

9

Battery Voltage Input.

The voltage of the cell pack is measured through this pin.

10

Power-Supply Input.

2.5V to 5.5V input range. Connect to system power through a

decoupling network.

PAD

PAD

Exposed Pad.