ISL28133ISENSEV1Z Intersil, ISL28133ISENSEV1Z Datasheet - Page 2

• Manufacturer Part Number: ISL28133ISENSEV1Z
• Description: EVALUATION BOARD FOR ISL28133
• Manufacturer: Intersil

Specifications of ISL28133ISENSEV1Z

• Channels Per Ic: 1 - Single
• Amplifier Type: Chopper (Zero-Drift)
• Output Type: Rail-to-Rail
• Slew Rate: 0.2 V/µs
• Current - Output / Channel: 26mA
• Operating Temperature: -40°C ~ 125°C
• Current - Supply (main Ic): 18µA
• Voltage - Supply, Single/dual (±): 1.65 V ~ 5.5 V
• Board Type: Fully Populated
• Utilized Ic / Part: ISL28133
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -

DNP
gain resistors and using the evaluation board resistor
values and the data sheet maximum +25°C V
the total input offset voltage as shown in Equations 3,
4 and 5:
Multiplying the ISL28133 input offset voltage by the
amplifier gain allows the input offset error to be
expressed as a percent of full scale output voltage.
Using the Evaluation Board
The evaluation board has separate connections for the
amplifier power supply, an output zero reference
(V
inter-connection between the I-SENSE terminals and
the V
different types of current sense configurations.
V
% F.S. Error
V
V
R1
OS Total
OS Total
OS Total
REF
DNP
(
(
(
R2
REF
),and the current sense terminals. The correct
I-SENSE+
I-SENSE-
)
)
)
terminals are needed to implement the
R3
0.1
=
=
=
=
(
⎛
⎝
⎛
⎝
3e 10
DNP
⎛
⎝
-------------------------------------- -
IOS
3e 10
R4
V
–
OS
–
±
DNP
×
2.5V
×
R5
×
R14
------------------------- -
R14
×
4950
R14
---------- -
R9
R14
------------------------- -
R14
10Ω
10Ω
R6
R7
×
+
⎞
⎠
)
R9
R9
FIGURE 1. ISL28133 DIFFERENTIAL CURRENT SENSE AMPLIFIER
+
=
×
+
2
8μV
R9
R9
±
⎞
⎠
1nF
0.038%
C7
D2
+
⎞
⎠
VOS
=
+
9.5μV
8μV
C8
10nF
C9
1nF
4.99k
4.99k
Application Note 1480
R9
R8
D3A
D3B
OS
(EQ. 4)
(EQ. 5)
(EQ. 3)
(EQ. 6)
gives
D4A
D4B
REFERENCE
R12A, B
1M
R10A, B
1M
V
S
/2
JUMPER
The I-SENSE + and I-SENSE - connections to the
measured circuit determine the polarity of the amplifier
output voltage. Establishing a current flow from the
I-SENSE + to I-SENSE - causes the output voltage to
increase in proportion to the input current. Reversing
the I-SENSE current flow reverses the output polarity.
The voltage applied to V
output zero current level, and must be between 0V
and +5V. For bi-directional current sensing, a
reference midway between the ground and the supply
voltage will maximize the output span. For example, a
V
supply. The jumper selectable internal voltage divider
is provided for this internal reference. The +2.5V will
establish an output current scale setting 0A = +2.5V,
but the accuracy is determined by the voltage divider
accuracy (0.1% resistors on the evaluation board).
Connecting the jumper to the external reference
position enables an external reference source to be
used.
Figure 2 shows the connections to implement a high
side, bi-directional current sense with the ability to
monitor the charging current. Figure 3 shows the
connection for uni-directional ground referenced
current sensing. The ISL28133 maintains precision
performance from rail-to-rail making precision
ground-side sensing possible.
REF
REFERENCE
= +2.5V would be the best choice for +5V power
EXT
3
4
+
ISL28133
-
V+
V-
5
2
OPEN
499k
R14
C20
499k
R11
1
C4
1nF
5.6V
D1
REF
pin defines the amplifier
C2
4.7µF
R13
0
R15
100
C10
OPEN
1.65V TO +5.5V
April 14, 2011
V
V
GND
V
S
REF
SENSE
OUT
AN1480.1