ISL28006_14 Datasheet, PDF (1/26 Pages) Intersil Corporation – Micropower, Rail to Rail Input Current Sense Amplifier with Voltage Output

Micropower, Rail to Rail Input Current Sense Amplifier with
Voltage Output
ISL28006
The ISL28006 is a micropower, uni-directional high-side and
low-side current sense amplifier featuring a proprietary
rail-to-rail input current sensing amplifier. The ISL28006 is
ideal for high-side current sense applications where the sense
voltage is usually much higher than the amplifier supply
voltage. The device can be used to sense voltages as high as
28V when operating from a supply voltage as low as 2.7V. The
micropower ISL28006 consumes only 50µA of supply current
when operating from a 2.7V to 28V supply.
The ISL28006 features a common-mode input voltage range
from 0V to 28V. The proprietary architecture extends the input
voltage sensing range down to 0V, making it an excellent
choice for low-side ground sensing applications. The benefit of
this architecture is that a high degree of total output accuracy
is maintained over the entire 0V to 28V common mode input
voltage range.
The ISL28006 is available in fixed (100V/V, 50V/V, 20V/V and
Adjustable) gains in the space saving 5 Ld SOT-23 package
and the 6 Ld SOT-23 package for the adjustable gain part. The
parts operate over the extended temperature range from
-40°C to +125°C.
Features
• Low Power Consumption. . . . . . . . . . . . . . . . . . . . . . 50µA, Typ
• Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.7V to 28V
• Wide Common Mode Input. . . . . . . . . . . . . . . . . . . . 0V to 28V
• Gain Versions
- ISL28006-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V/V
- ISL28006-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V/V
- ISL28006-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V/V
- ISL28006-ADJ . . . . . . . . . . . . . . . . ADJ (Min Gain = 20V/V)
• Operating Temperature Range . . . . . . . . . . . . -40°C to +125°C
• Packages. . . . . . . . . . . . . . . . . . . . . .5 Ld SOT-23, 6 Ld SOT-23
Applications
• Power Management/Monitors
• Power Distribution and Safety
• DC/DC, AC/DC Converters
• Battery Management/Charging
• Automotive Power Distribution
Related Literature
• See AN1532 for “ISL28006 Evaluation Board User’s Guide”
SENSE
+12VDC
SENSE
+5VDC
SENSE
+1.0VDC
MULTIPLE
OUTPUT
POWER SUPPLY
GND
R_SENSE
-
+5VDC
ISL28006
+
R_SENSE
-
+5VDC
ISL28006
+
R_SENSE
-
+5VDC
ISL28006
+
FIGURE 1. TYPICAL APPLICATION
+12VDC
OUTPUT
I_SENSE
+12VDC
+5VDC
OUTPUT
I_SENSE
+5VDC
+1.0VDC
OUTPUT
I_SENSE
+1.0VDC
0.6
+100°C -40°C _+25°C +125°C GAIN 100
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
-1.2
-1.4
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
V_RS+ (V)
FIGURE 2. GAIN ACCURACY vs V_RS+ = 0V TO 28V
November 22, 2013
1
FN6548.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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