Datasheet

LTC6802-1
4
68021fa
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The ADC specifications are guaranteed by the Total Measurement
Error (V
ERR
) specification.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Discharge Switch On-Resistance V
CELL
> 3V (Note 3)
l
10 20 
Temperature Range
l
–40 85 °C
Thermal Shutdown Temperature 145 °C
Thermal Shutdown Hysteresis 5°C
Voltage Mode Timing Specifications
t
CYCLE
Measurement Cycle Time Time Required to Measure 11 or 12 Cells
Time Required to Measure Up to 10 Cells
Time Required to Measure 1 Cell
l
l
11
9.2
1
13
11
1.2
16
13.5
1.5
ms
ms
ms
t
1
SDI Valid to SCKI Rising Setup
l
10 ns
t
2
SDI Valid to SCKI Rising Hold
l
250 ns
t
3
SCKI Low
l
400 ns
t
4
SCKI High
l
400 ns
t
5
CSBI Pulse Width
l
400 ns
t
6
SCKI Rising to CSBI Rising
l
100 ns
t
7
CSBI Falling to SCKI Rising
l
100 ns
t
8
SCKI Falling to SDO Valid
l
250 ns
Clock Frequency
l
1 MHz
Watchdog Timer Time Out Period
l
1 2.5 s
Timing Specifications
t
PD1
CSBI to CSBO C
CSBO
= 150pF
l
600 ns
t
PD2
SCKI to SCKO C
SCKO
= 150pF
l
300 ns
t
PD3
SDI to SDOI Write Delay C
SDOI
= 150pF
l
300 ns
t
PD4
SDOI to SDI Read Delay C
SDO
= 150pF
l
300 ns
Voltage Mode Digital I/O Specifications
V
IH
Digital Input Voltage High Pins SCKI, SDI, and CSBI
l
2V
V
IL
Digital Input Voltage Low Pins SCKI, SDI, and CSBI
l
0.8 V
V
OL
Digital Output Voltage Low Pin SDO; Sinking 500µA
l
0.3 V
Current Mode Digital I/O Specifications
I
IH1
Digital Input Current High Pins CSBI, SCKI, and SDI (Write)
l
10 µA
I
IL1
Digital Input Current Low Pins CSBI, SCKI, and SDI (Write)
l
1000 µA
I
IH2
Digital Input Current High Pin SDOI (Read)
l
–1000 µA
I
IL2
Digital Input Current Low Pin SDOI (Read)
l
–10 µA
I
OH1
Digital Output Current High Pins CSBO, SCKO, and SDOI (Write)
l
310 µA
I
OL1
Digital Output Current Low Pins CSBO, SCKO, and SDOI (Write)
l
1000 1200 1650 µA
I
OH2
Digital Output Current High Pin SDI (Read)
l
–1650 –1200 –1000 µA
I
OL2
Digital Output Current Low Pin SDI (Read)
l
–10 –3 0 µA
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 43.2V, V
–
= 0V, unless otherwise noted.
Note 3: Due to the contact resistance of the production tester, this
specification is tested to relaxed limits. The 20 limit is guaranteed by
design.
Note 4: V
CELL
refers to the voltage applied across the following pin
combinations: Cn to Cn-1 for n = 2 to 12, C1 to V
–
. V
TEMP
refers to the
voltage applied from V
TEMP1
or V
TEMP2
to V
–
.
Note 5: These absolute maximum ratings apply provided that the voltage
between inputs do not exceed their absolute maximum ratings.