PAC1720 Datasheet, PDF (12/47 Pages) SMSC Corporation – Dual High-Side Current Sense Monitor with Power Calculation

Dual High-Side Current Sense Monitor with Power Calculation
Datasheet
Table 2.2 Electrical Specifications (continued)
MAX values are at T_A = -40°C to 85, V_DD = 3V to 5.5V, V_SOURCE = 0V to 40V
TYP values are at T_A = 25°C, V_DD = 3.3V, V_SOURCE = 24V, V_SENSE = (SENSE+ - SENSE-) = 0V
CURRENT SENSE FULL SCALE RANGE = 80mV unless otherwise noted.
CHARACTERISTIC SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS / NOTES
Total Power Ratio
P_{RATIO _ERR}
Measurement Error (±)
(negative range)
2
% FSR FSR = -10mV to 0, -20mV to 0,
-40mV to 0, or -80mV to 0
First Power Ratio
Ready
t_{CONV_P}
220
ms
Digital I/O Pins (SMCLK, SMDATA, ALERT)
Time after power up before
P_RATIO updated
Pull-up Voltage Range
V_PULLUP
3.0
5.5
V
Pull-up voltage for SMBus and
ALERT pins
Time to First
Communications
t_COMM
25
ms
Input High Voltage
V_IH
2.0
Input Low Voltage
V_IL
Output Low Voltage
V_OL
V
SMCLK, SMDATA
OD pins pulled up to V_PULLUP
0.8
V
0.4
V
OD pin pulled to V_PULLUP
3mA current sink
Leakage Current (±)
I_LEAK
5
µA
powered or unpowered
TA < 85°C
2.2 SMBus Electrical Specifications
Table 2.3 SMBus Electrical Specifications
MAX values are at T_A = -40°C to 85, V_DD = 3V to 5.5V, V_SOURCE = 0V to 40V
TYP values are at T_A = 25°C, V_DD = 3.3V, V_PULLUP = 3.3V, V_SOURCE = 24V, V_SENSE = (SENSE+ - SENSE-) = 0V
CURRENT SENSE FULL SCALE RANGE = 80mV unless otherwise noted.
CHARACTERISTIC
Input Capacitance
Clock Frequency
Spike Suppression
Bus Free Time Stop to
Start
Start Setup Time
Start Hold Time
Stop Setup Time
Data Hold Time
Data Hold Time
SYMBOL MIN TYP MAX UNITS
CONDITIONS
C_IN
f_SMB
t_SP
t_BUF
4
10
pF
10
400
kHz
100
ns
1.3
μs
t_SU:STA
0.6
t_HD:STA
0.6
t_SU:STO
0.6
t_HD:DAT
0
t_HD:DAT
0.3
μs
μs
μs
μs When transmitting to the master
μs When receiving from the master
Revision 1.1 (12-08-11)
12
SMSC CONFIDENTIAL DATASHEET
SMSC PAC1720