ISL28005_11 Datasheet, PDF (10/14 Pages) Intersil Corporation – Micropower, Rail-to-Rail Input Current Sense Amplifier

ISL28005
OPTIONAL
FILTER
CAPACITOR
I_S
+
R_S
-
R_S+
V_SENSE
R_S-
OPTIONAL
TRANSIENT
PROTECTION
LOAD
I = 2.86µA
V_SENSE
R₁
gm_HI
V_CC
HIGH-SIDE
SENSING
V_RS+ = 2V TO 28V
R₂
1.35V
+
-
R_f
R₃
gm_{LO ‘VSENSE}
R₅
R_g
I_MIRROR
R₄
GND
V_CC = 2V to 28V
OUT
FIGURE 18. HIGH-SIDE CURRENT DETECTION
LOAD
OPTIONAL
FILTER
CAPACITOR
I_S
+
R_S
-
R_S+
V_SENSE
R_S-
OPTIONAL
TRANSIENT
PROTECTION
I = 2.86µA
V_SENSE
R₁
gm_HI
V_CC
LOW-SIDE
SENSING
V_RS+= 0V TO 2V
R₂
1.35V
V_CC
R₃
gm_LO
+
-
R_f
R₅
R_g
I_MIRROR
‘V_SENSE
R₄
GND
V_CC = 2V TO 28V
OUT
FIGURE 19. LOW-SIDE CURRENT DETECTION
10
FN6973.4
July 1, 2011