Linear Technology LTC6804-1 - Page 7

LTC6804-1/LTC6804-2
7
680412fc
For more information www.linear.com/LTC6804-1
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
+
Supply Voltage TME Specifications Met (Note 6)
l
11 40 55 V
V
REG
V
REG
Supply Voltage TME Supply Rejection < 1mV/V
l
4.5 5 5.5 V
DRIVE output voltage Sourcing 1µA
l
5.4
5.2
5.6
5.6
5.8
6.0
V
V
Sourcing 500µA
l
5.1 5.6 6.1 V
V
REGD
Digital Supply Voltage
l
2.7 3.0 3.6 V
Discharge Switch ON Resistance V
CELL
= 3.6V
l
10 25 Ω
Thermal Shutdown Temperature 150 °C
V
OL(WDT)
Watchdog Timer Pin Low WDT Pin Sinking 4mA
l
0.4 V
V
OL(GPIO)
General Purpose I/O Pin Low GPIO Pin Sinking 4mA (Used as Digital Output)
l
0.4 V
ADC Timing Specifications
t
CYCLE
(Figure3)
Measurement + Calibration Cycle
Time When Starting from the
REFUP State in Normal Mode
Measure 12 Cells
l
2120 2335 2480 µs
Measure 2 Cells
l
365 405 430 µs
Measure 12 Cells and 2 GPIO Inputs
l
2845 3133 3325 µs
Measurement + Calibration Cycle
Time When Starting from the
REFUP State in Filtered Mode
Measure 12 Cells
l
183 201.3 213.5 ms
Measure 2 Cells
l
30.54 33.6 35.64 ms
Measure 12 Cells and 2 GPIO Inputs
l
244 268.4 284.7 ms
Measurement + Calibration Cycle
Time When Starting from the
REFUP State in Fast Mode
Measure 12 Cells
l
1010 1113 1185 µs
Measure 2 Cells
l
180 201 215 µs
Measure 12 Cells and 2 GPIO Inputs
l
1420 1564 1660 µs
t
SKEW1
(Figure 6)
Skew Time. The Time Difference
between C12 and GPIO2
Measurements, Command =
ADCVAX
Fast Mode
l
189 208 221 µs
Normal Mode
l
493 543 576 µs
t
SKEW2
(Figure 3)
Skew Time. The T
ime
Difference between C12 and C0
Measurements, Command = ADCV
Fast Mode
l
211 233 248 µs
Normal Mode
l
609 670 711 µs
t
WAKE
Regulator Start-Up Time V
REG
Generated from Drive Pin (Figure 28)
l
100 300 µs
t
SLEEP
Watchdog or Software Discharge
Timer
SWTEN Pin = 0 or DCTO[3:0] = 0000
l
1.8 2 2.2 sec
SWTEN Pin = 1 and DCTO[3:0] ≠ 0000 0.5 120 min
t
REFUP
(Figure1,
Figures 3 to 7)
Reference Wake-Up T
ime State: Core = STANDBY
l
2.7 3.5 4.4 ms
State: Core = REFUP
l
0 ms
f
S
ADC Clock Frequency
l
3.0 3.3 3.5 MHz
SPI Interface DC Specifications
V
IH(SPI)
SPI Pin Digital Input Voltage High Pins CSB, SCK, SDI
l
2.3 V
V
IL(SPI)
SPI Pin Digital Input Voltage Low Pins CSB, SCK, SDI
l
0.8 V
V
IH(CFG)
Configuration Pin Digital
Input Voltage High
Pins ISOMD, SWTEN, GPIO1 to GPIO5, A0 to A3
l
2.7 V
V
IL(CFG)
Configuration Pin Digital
Input Voltage Low
Pins ISOMD, SWTEN, GPIO1 to GPIO5, A0 to A3
l
1.2 V
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. The test conditions are V
+
= 39.6V, V
REG
= 5.0V unless otherwise noted.