Datasheet

7
LTC1325
BLOCK DIAGRAM
W
10-BIT
A/D CONVERTER
CHARGE LOOP
AND
GAS GAUGE
FAULT
DETECT
CIRCUITRY
DIVIDER
TIMEOUT LOGIC
TO0 TO TO2
DR0 TO DR3
3
T
OUT
111kHz
OSCILLATOR
DUTY RATIO
GENERATOR
ADC
MUX
SERIAL
I/O
3.072V
ANALOG
REGULATOR
5V
DIGITAL
REGULATOR
ANALOG AND DIGITAL V
DD
ADC REFERENCE
CONTROL
LOGIC
3
PS
GAS GAUGE
4
DIV0 TO DIV3
5 MOD0 TO MOD1, VR0 TO VR1, PS
CHARGE
11
SENSE
15
V
BAT
14
T
BAT
FILTER
PGATE
LTC1325 • BD
10
17
6
LTF
8
HTF
7
MCV
t
OUT
13
T
AMB
12
V
IN
10
2
D
OUT
D
IN
CS
GND
3
4
CLK
5
DIGITAL INPUT CIRCUITS
9
V
DD
18
PS, MSBF
2
DS0 TO DS1
SGL/DIFF
3
3
MOD0 TO MOD1, PS
7
BATP, BATR, FMCV,
FEDV, FHTF, FLTF, t
OUT
DIS
16
REG
1
PS
TEST CIRCUITS

Load Circuit for t
dDO
, t
r
and t
f
Load Circuit for t
dis
and t
en
D
OUT
3k
100pF
TEST POINT
5V t
dis
WAVEFORM 2, t
en
t
dis
WAVEFORM 1
LTC1325 • TC02
D
OUT
1.4V
3k
100pF
LTC1325 • TC01