DS2703K Maxim Integrated, DS2703K Datasheet - Page 2

• Manufacturer Part Number: DS2703K
• Description: Battery Management
• Manufacturer: Maxim Integrated
• Series: DS2703r

SETUP AND INSTALLATION
BOARD CONNECTIONS
Connections to the demonstration board are best made either by soldering directly to the pads or by using
cables with mini-grabber clips. Communication to the board can be accomplished through the RJ-11 jack
by connecting the provided standard six conductor RJ-11 cord to the DS9123O USB Adapter. No other
connections are required for communicating with the device and performing SHA-1 Calculations.
A 15V programming supply should be connected between the VPP and VSS pads, as shown in Figures 1
and 2, if any of the commands that require a programming pulse are used. To measure the Thermistor
divider voltage, connect the meter across the THM and VSS pads. Since the Thermistor divider voltage
is only valid for a limited time following the Activate THM command, a trigger pulse is provided on the
TRGR pad to signal that a voltage measurement should be made. See the Main Program Window section
below for more details on programming and thermistor measurements.
RJ-11
GPIO
GND
SDA
RST
SCL
DQ
TRGR
Programming Pulse Control
Thermistor Measurement Trigger
VSS
150Ω
150Ω
IN
COM
V-
MAX4676
9.7V
Analog Switch: DQ disabled
for Thermistor Measurement
GND
Figure 1: DS2703 EV Kit Schematic
NO
2 of 11
10KΩ
MOSFET P
45KΩ
100Ω
5.6V
J1
VPP VSS
THM
Thermistor
VSS
0Ω
Thermistor Measurement
15V Programming Supply Input
DQ
THM
DS2703
.1μF or
.22μF
VSS
VB