14-Channel, High-Voltage Data-
Acquisition Systems
ADES1754/ADES1755/ADES1756
(V
= +56V, T = T
to T
unless otherwise noted, where T
= -40°C and T
= +105°C. Typical values are at T = +25°C.
MAX A
DCIN
A
MIN
MAX
MIN
Operation is with the recommend application circuit. (Note 5))
PARAMETER
SYMBOL
CONDITIONS
FORCEPOR = 1
MIN
TYP
MAX
800
1
UNITS
R
Pull-down Resistance
200
500
Ω
FORCEPOR
V
= 3.3V
SHDNL
I
Input Leakage Current
µA
µA
LKG_SHDNL
V
V
= 65V
< V
40
75
SHDNL
SHDNL
; baud rate =
Charge Pump Current -
UARTL/UARTU
SHDNLIMIT
I
15
117
350
SHDNL
2Mbps; Note 13
UARTSEL
0.7 x
UARTSEL Input High
Voltage
V
V
IH_UARTSEL
V
AA
GENERAL-PURPOSE I/O (GPIOn)
0.3 x
V
IL_GPIO
Input Low Voltage
Input High Voltage
V
V
V
DDL2
0.7 x
V
IH_GPIO
V
DDL2
R
GPIO
Pull-down Resistance
Output Low Voltage
AUXINn/GPIOn configured as GPIO input
0.5
2
7.5
0.4
MΩ
V
I
= 4mA
OL_GPIO
OH_GPIO
V
SINK
V
V
-
DDL2
0.4
V
I
= 4mA
Output High Voltage
ALERTIN
V
SOURCE
V
V
V
DDL2/3
ALERTIN Comparator
Threshold
DDL2/3
/2 - 0.4
DDL2/3
/2
V
CL
V
mV
V
/2 + 0.4
V
HYS_ALERTI
N
ALERTIN Comparator
Hysteresis
75
ALERTIN Common-
Mode Voltage Bias
DDL2/3
/2
V
CM
LKG_ALERTIN
I
V
= 1.5V
Leakage Current
Input Capacitance
±1.0
2
µA
pF
ALERTIN
C
ALERTIN
1/
OSC_16
M
t
f
Bit Period
Note 14
8
BIT
t
t
ALERTIN Fall Time
ALERTIN Rise Time
Note 8, Note 15
Note 8, Note 15
0.5
0.5
ALERTIN_FALL
BIT
t
t
ALERTIN_RISE
BIT
t
ALERTIN Qualification
Time
ALERTIN_QUA
L
25
μs
Propagation Delay
(ALERTIN Port to
ALERTOUT Port)
Start-Up Time from
t
t
2.5
3
ALERT_PROP
BIT
t
ALERTIN_STA
RTUP
SHNDL High and V
=
1
ms
AA
0V to ALERTIN Valid
ALERTOUT
V
OL_ALERTOU
I
I
= 20mA
Output Low Voltage
Output High Voltage
0.4
+1
V
V
SINK
T
V
V
-
OH_ALERTOU
DDL2
0.4
= 20mA
= 1.5V
SOURCE
T
I
LKG_ALERTO
UT
V
Leakage Current
-1
µA
ALERTOUT
3.3V REGULATOR (V
, V
)
DDL2 DDL3
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