Datasheet

LTC4222
4
4222fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Other Pin Functions
V
GPIO(OL)
GPIO Output Low Voltage I
GPIO
= 5mA
l
0.25 0.4 V
I
GPIO(OH)
GPIO Input Leakage Current V
GPIO
= 15V
l
0 ±1 µA
I
SOURCE
SOURCE Input Current SOURCE = 15V
l
70 115 170 µA
t
P(GATE)
Input (ON, OV, UV, EN) to GATE Off
Propagation Delay
l
3 5 µs
t
D(GATE)
GATE Turn-On Delay ON
UV, OV, EN
Overcurrent Auto-Retry
l
l
l
75
4.2
4
100
5
8
125
6.7
µs
ms
s
V
TIMERL(TH)
TIMER Low Threshold
l
0.18 0.2 0.22 V
V
TIMERH(TH)
TIMER High Threshold
l
1.215 1.235 1.260 V
I
TIMER(UP)
TIMER Pull-Up Current
l
90 100 110 µA
I
TIMER(DOWN)
TIMER Pull-Down Current for OC
Auto-Retry
l
1.6 2.15 2.6 µA
I
TIMER(UP/DOWN)
TIMER Pin OC Auto-Retry Duty Cycle
l
38 50 58 N/A
I
SS
Soft-Start Ramp Pull-Up Current Ramping
Waiting for GATE to Slew
l
l
7.5
0.5
10
0.75
12.5
0.95
µA
µA
ADC
RES Resolution (No Missing Codes)
l
10 Bits
V
FS
Full-Scale Voltage (1023 • V
LSB
) (V
DD
– SENSE)
SOURCE
ADIN
64
32
1.28
mV
V
V
LSB LSB Step Size (V
DD
– SENSE)
SOURCE
ADIN
62.5
31.25
1.25
µV
mV
mV
V
OS
Offset Error (V
DD
– SENSE)
SOURCE
ADIN
l
l
l
±3
±2
±2
LSB
LSB
LSB
INL Integral Nonlinearity (Note 5)
l
±0.5 LSB
TUE Total Unadjusted Error/Full-Scale Error (V
DD
– SENSE)
SOURCE
ADIN
l
l
l
±1.5
±1
±1
%
%
%
R
ADIN
ADIN Sampling Resistance V
ADIN
= 1.28V
l
1 2
MΩ
I
ADIN
ADIN Input Current V
ADIN
= 1.28V
l
0 ±0.1 µA
Conversion Rate 15 Hz