LTC6820
Typical perForMance characTerisTics VDD = VDDS, unless otherwise noted.
Comparator Threshold Gain
vs ICMP Voltage
Comparator Threshold Gain
vs Common Mode
Comparator Threshold Gain
vs Temperature
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.56
0.54
0.52
0.50
0.48
0.46
0.44
V
= 3V
3 PARTS
DD
3 PARTS
V
= 1V
V
= 1V
ICMP
ICMP
DD
V
= 3V
V
= 5V
DD
V
= 0.2V
= 3V
ICMP
DD
V
= 0.2V
= 5V
ICMP
DD
V
V
V
DD
V
DD
= 3V
= 5V
V
ICMP
V
ICMP
= 1V
= 0.2V
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
COMMON MODE VOLTAGE (V)
25
50
125
–50 –25
0
75 100
0.8
ICMP VOLTAGE (V)
0
0.2 0.4 0.6
1.0 1.2 1.4 1.6
TEMPERATURE (°C)
6820 G17
6820 G18
6820 G16
Wake-Up Pulse Amplitude
vs Dwell Time
Start-Up Time
300
250
200
150
100
50
V
= 3V
DD
CS
GUARANTEED
WAKE-UP REGION
3.6µs
5V/DIV
IBIAS
2V/DIV
IP-IM
1V/DIV
6820 G06
V
= 5V
1µs/DIV
DDS
MSTR = 1
= 2k
150
300
WAKE-UP DWELL TIME, t
450
0
600
R
BIAS
(ns)
DWELL
6820 G20
SPI Signal and isoSPI Pulses, MSTR = 1
SPI Signal and isoSPI Pulses, MSTR = 0
IP-IM
2V/DIV
CS
5V/DIV
CS
5V/DIV
SCK
5V/DIV
MOSI
5V/DIV
SCK
5V/DIV
MOSI
5V/DIV
MIS0
5V/DIV
MIS0
5V/DIV
IP-IM
2V/DIV
6820 G22
6820 G21
V
V
= 5V
DDS
1.2µs/DIV
V
V
= 5V
DDS
1.2µs/DIV
DD
DD
= 5V
= 3.3V
PHA = 0
POL = 0
PHA = 1
POL = 1
6820f
7