ISL28005_14 Datasheet, PDF (9/15 Pages) Intersil Corporation – Micropower, Rail-to-Rail Input Current Sense Amplifier with Voltage Output

ISL28005
Typical Performance Curves V_CC = 12V, R_L = 1M, unless otherwise specified. (Continued)
40
30
100pF
20
NO CL
10
4.7nF
0
-10
-20
V_CC = 5V
V_RS- = 3V
-30 ^AV ^{= 20}
V_OUT = 400mV_P-P
-40
1k
10k
10nF
100k
FREQUENCY (Hz)
1000pF
1M
220
180
100pF
140
NO CL
100
60
4.7nF
20
10nF
-20
-60
-100 ^VCC ^{= 5V}
1000pF
-140 ^{VRS- = 3V}
A_V = 20
-180 _{VOUT = 400mVP-P}
-2201k
10k
100k
1M
FREQUENCY (Hz)
FIGURE 17. CAPACITIVE LOAD DRIVE GAIN vs FREQUENCY
FIGURE 18. CAPACITIVE LOAD DRIVE PHASE vs FREQUENCY
15
10
I_RS+
5
0
-5 V_CC = 12V
V_RS- = 0V
-10 ^{AV = 20}
R_L = 1M
I_RS+
-15
0
50
100
150
200
250
DIFFERENTIAL VOLTAGE RS+ TO RS- (mV)
FIGURE 19. LOW-SIDE CURRENT SENSING INPUT BIAS CURRENTS
20
15
I_RS+
10
V_CC = 12V
5
V_RS- = 12V
A_V = 20
0
R_L = 1M
-5
I_RS+
-10
0
50
100
150
200
250
DIFFERENTIAL VOLTAGE RS+ TO RS- (mV)
FIGURE 20. HIGH-SIDE CURRENT SENSING INPUT BIAS
CURRENTS
Test Circuits and Waveforms
+
V_RS+
-
+
V_SENSE
-
V_CC
I_CC
RS+
OUT
RS-
GND
1MΩ R_L ^VOUT
+
V_RS+
-
V_R1
V_CC
R1
+
V_SENSE
-
R2
V_R2
RS+
RS-
GND
OUT
1MΩ R_L ^VOUT
FIGURE 21. I_CC, V_OS, V_OA, CMRR, PSRR, GAIN ACCURACY
FIGURE 22. INPUT BIAS CURRENT, LEAKAGE CURRENT
9
FN6973.5
October 24, 2013