ISL28023 Datasheet, PDF (13/55 Pages) Intersil Corporation – Bidirectional current sensing

ISL28023
Typical Performance Curves T_A = +25°C, VCC = 3.3V, VINP = VBUS = 12V, AUXP = AUXV = 3V,
VSHUNT = VAUXSHUNT = 80mV, Conversion Time: Aux = Primary = 2.05ms, Internal AVG Aux = Primary = 128; unless otherwise specified. (Continued)
20
15
10
5
0
-5
-10
-15
-20
0
8
16 24 32 40 48 56 64
CMV (V)
FIGURE 9. PRIMARY V_SHUNT CMRR vs CMV
130
125
TIME = 1.024ms
120 ^{TIME = 0.512ms}
TIME = 2.048ms
115
110
105
TIME = 0.128ms
100
TIME = 0.256ms
95
TIME = 0.64ms
90 ₁₀
100
1k
10k
FREQUENCY (Hz)
100k
FIGURE 10. PRIMARY V_SHUNT AC CMRR vs FREQUENCY
95
85
TO CMV = 60V
75
65
55
45
V_INPUT = 80MV_P-P SINE WAVE
FREQUENCY = 100Hz
ADC TIMING = 64µs
35
-80 -70 -60 -50 -40 -30 -20 -10 0
CMV (mV)
FIGURE 11. PRIMARY V_SHUNT COMMON-MODE RANGE
8
7
6
5
4
3
2
1
0
GAIN ERROR (%)
FIGURE 13. PRIMARY V_SHUNT ADC GAIN ERROR
180
160
SMBALERT2
140
SOURCE
120
100
SMBALERT1
80
SINK
60
40
20
0
0.01
0.1
1
CURRENT LOAD (mA)
SMBALERT2
SINK
10
FIGURE 12. SMBALERT CURRENT DRIVES
6
5
4
3
2
1
0
V_SHUNT GAIN ERROR TC (ppm/°C)
FIGURE 14. PRIMARY V_SHUNT ADC GAIN ERROR TC
Submit Document Feedback ₁₃
FN8389.5
March 18, 2016