ds2786 Maxim Integrated Products, Inc., ds2786 Datasheet - Page 4

• Manufacturer Part Number: ds2786
• Description: Ds2786 Standalone Ocv-based Fuel Gauge
• Manufacturer: Maxim Integrated Products, Inc.

Figure 1. 2-Wire Bus Timing Diagram
PIN DESCRIPTION
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
PAD
PIN
10
1
2
3
4
5
6
7
8
9
All voltages are referenced to V
Offset specified after auto-calibration cycle and Current Offset Bias Register = 00h.
The DS2786 enters the Sleep mode 1.5s to 2.2s after (SCL < V
Timing must be fast enough to prevent the DS2786 from entering Sleep mode due to bus low for period
> t
f
The maximum t
signal.
This device internally provides a hold time of at least 100ns for the SDA signal (referred to the V
the SCL signal) to bridge the undefined region of the falling edge of SCL.
Filters on SDA and SCL suppress noise spikes at the input buffers and delay the sampling instant.
C
SCL
NAME
B
V
AIN1
AIN0
SDA
SNS
V
PAD
SCL
SLEEP
—total capacitance of one bus line in pF.
V
V
V
PROG
OUT
must meet the minimum clock low time plus the rise/fall times.
DD
SS
IN
.
Aux Voltage Input Number 1
Aux Voltage Input Number 0
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.
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.
Current-Sense Input. Connect to the handset side of the sense resistor.
Device Ground. Connect to the battery side of the sense resistor.
EEPROM Programming Voltage Input. Connect to external supply for production
programming. Connect to V
Voltage Out. Supply for Aux Input Voltage Measurement Dividers. Connect to high side
of resistor divider circuits.
Battery Voltage Input. The voltage of the cell pack is measured through this pin.
Power-Supply Input. 2.5V to 5.5V input range. Connect to system power through a
decoupling network.
Exposed Pad. Connect to V
HD:DAT
has only to be met if the device does not stretch the LOW period (t
SS
.
SS
SS
4 of 22
during normal operation.
.
FUNCTION
DS2786 Standalone OCV-Based Fuel Gauge
IL
) AND (SDA < V
IL
).
LOW
) of the SCL
IHmin
of