PAC1720 Datasheet, PDF (32/47 Pages) SMSC Corporation – Dual High-Side Current Sense Monitor with Power Calculation

Dual High-Side Current Sense Monitor with Power Calculation
Datasheet
Table 5.14 Current Sensing Sampling Time Settings
CS_SAMP_TIME[2:0]
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
CURRENT SENSOR SAMPLE TIME
2.5ms (Data = sign + 6 bits)
5ms (Data = sign + 7 bits)
10ms (Data = sign + 8 bits)
20ms (Data = sign + 9 bits)
40ms (Data = sign + 10 bits)
80ms (Data = sign + 11 bits) (default)
160ms (Data = sign + 11 bits) (see Note 5.2)
320ms (Data = sign + 11 bits) (see Note 5.3)
Equation [2]
DENOMINATOR
63
127
255
511
1023
2047
2047
2047
Note 5.2 160ms sampling time has built-in 2X analog oversampling using ADC at 12-bit resolution.
Note 5.3 320ms sampling time has built-in 4X analog oversampling using ADC at 13-bit resolution.
Table 5.15 Current Sensing Range Settings
CS_RNG[1:0]
0
0
0
1
1
0
1
1
FULL SCALE RANGE
-10mV to 10mV
-20mV to 20mV
-40mV to 40mV
-80mV to 80mV (default)
5.10 Sense Voltage Registers
Table 5.16 Sense Voltage Registers
ADDR R/W REGISTER
B7
B6
B5
B4
B3
B2
B1
B0 DEFAULT
0Dh
R
CH1 Sense Sign 1024 512 256 128
64
32
16
00h
Voltage High
Byte
0Eh
R
CH1 Sense
8
4
2
1
00h
Voltage Low
Byte
0Fh
R
CH2 Sense Sign 1024 512 256 128
64
32
16
00h
Voltage High
Byte
10h
R
CH2 Sense
8
4
2
1
00h
Voltage Low
Byte
Revision 1.1 (12-08-11)
32
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SMSC PAC1720