8
Rev. 0
CONNECTOR J3 PIN ASSIGNMENT
PIN
NAME
DESCRIPTION
PIN
NAME
DESCRIPTION
15
GND
LTC2949’s GND
16
V
REF
LTC2949’s 3V Reference Voltage Output
13
VBATM
Negative BAT Input
14
VBATP
Positive BAT Input
11
NTC2+V2 Analog Input, a 100k NTC/R
REF
is Connected Onboard
12
V3
Analog Input V3
9
V4
Analog Input V4
10
V5
Analog Input V5
7
V6
Analog Input V6
8
V7
Analog Input V7
5
V8_DO1
Analog Input V8/Digital Output DO3 (Note 4)
6
V9_DO2
Analog Input V9/Digital Output DO2 (Note 4)
3
V10_DO3 Analog Input V10/Digital Output DO3 (Note 4)
4
GND
LTC2949’s GND
1
GND
LTC2949’s GND
2
ADV
CC
LTC2949’s ADV
CC
Supply Voltage
Note 1. All dual purpose pins (GPIOs) do not have their filter capacitor populated on the PCB. This was done to not interfere with the digital output function
(including the 400kHz toggling mode) of those pins. It is recommended to assemble an input filter capacitor (C14, C19, C20) to the GPIOs that are used in
analog input only mode for best noise filter performance.
PIN FUNCTIONS
PIN/
TURRET
NAME DESCRIPTION
PIN/
TURRET
NAME
DESCRIPTION
E1
BATP
See J3 VBATP
E10
VR
EF
See J3 V
REF
E2
BATM See J3 VBATM
E11
ADV
CC
See J3 VBATP
E3
V3
See J3 V3
E12, E13
GND
See J3 VBATP
E4
V4
See J3 V4
E21
MISO
LTC2949’s SPI Interface (When Configured to
SPI Mode, See JP3–JP6)
E5
V5
See J3 V5
E22
MOSI
E6
V6
See J3 V6
E23
SCK
E7
V7
See J3 V7
E24
CS
E8
V8
See J3 V8_DO1
E9
D2
See J3 V9_DO2
E18
D4
Isolated, Rectified and Buffered Heart Bit Signal
V11_DO4
E17
HB4
Isolated Heart Bit Signal V11_DO4
E19
D5
Isolated, Rectified and Buffered Heart Bit Signal
V12_DO5 (Over Current Comparator Output)
E20
HB5
Isolated Heart Bit Signal V12_DO5 (Over
Current Comparator Output)
E14, E15
LGND Negative Supply Input to Onboard Isolated Flyback
Converter LT8301
E16
V
CC
Positive Supply Input to Onboard Isolated
Flyback Converter LT8301
Note:
= Signals on the low voltage side, isolated from LTC2949
HARDWARE DESCRIPTION
