MAX4173FEUT-T Maxim Integrated Products, MAX4173FEUT-T Datasheet - Page 8

• Manufacturer Part Number: MAX4173FEUT-T
• Description: IC AMP HISIDE CURR V-OUT SOT23-6
• Manufacturer: Maxim Integrated Products

Specifications of MAX4173FEUT-T

• Amplifier Type: Current Sense
• Number Of Circuits: 1
• -3db Bandwidth: 1.4MHz
• Current - Input Bias: 700µA
• Voltage - Input Offset: 300µV
• Current - Supply: 420µA
• Voltage - Supply, Single/dual (±): 3 V ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Supply Voltage (max): 28 V
• Supply Voltage (min): 3 V
• Operating Temperature Range: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Output Type: -
• Current - Output / Channel: -
• Slew Rate: -
• Gain Bandwidth Product: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

amp’s supply voltage range should be at least as high
as any voltage the system may encounter.
The percent error introduced by output loading is
determined with the following formula:
where R
Low-Cost, SOT23, Voltage-Output,
High-Side Current-Sense Amplifier
Table 1. Recommended Component Values
Figure 2. MAX4173 Connections Showing Use of PC Board
8
FULL-SCALE LOAD CURRENT
_______________________________________________________________________________________
0.3 in. COPPER
INPUT
%
LOAD
ERROR
I
LOAD
is the external load applied to OUT.
0.1
10
1
5
=
(A)
+
100
RS+
0.1 in. COPPER
MAX4173T
R
V
⎛
⎜
⎝
SENSE
SENSE
GND
12k
Ω +
RS-
R
OUT
V
CC
LOAD
_
R
LOAD
CURRENT-SENSE RESISTOR
+3V TO +28V
LOAD/BATTERY
0.3 in. COPPER
0.1μF
−
R
1
SENSE
⎞
⎟
⎠
1000
100
20
10
(mΩ Ω )
Figure 3 shows a block diagram using the MAX4173
with a switching regulator to make a current source.
Figure 3. Current Source
V
IN
REGULATOR
SWITCHING
LOW-COST
GAIN
100
100
100
100
20
50
20
50
20
50
20
50
0 TO +28V
0.1μF
+3V TO +28V
FULL-SCALE OUTPUT VOLTAGE
(FULL-SCALE V
Current Source Circuit
OUT
RS+
V
CC
MAX4173
V
V
R
GND
SENSE
SENSE
OUT
10.0
10.0
10.0
10.0
2.0
5.0
5.0
2.0
5.0
2.0
5.0
2.0
SENSE
(V)
RS-
= 100mV)
I
LOAD
BATTERY
LOAD/