TSC101AILT STMicroelectronics, TSC101AILT Datasheet - Page 14

• Manufacturer Part Number: TSC101AILT
• Description: IC AMP HISIDE CURR SENSE SOT23-5
• Manufacturer: STMicroelectronics

Specifications of TSC101AILT

• Mfg Application Notes: TSC101 AppNote
• Amplifier Type: Current Sense
• Number Of Circuits: 1
• Slew Rate: 0.9 V/µs
• -3db Bandwidth: 500kHz
• Current - Input Bias: 5.5µA
• Voltage - Input Offset: 200µV
• Current - Supply: 165µA
• Current - Output / Channel: 60mA
• Voltage - Supply, Single/dual (±): 4 V ~ 24 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Number Of Channels: Single
• Common Mode Rejection Ratio (min): 90 dB
• Available Set Gain: 26.02 dB (Typ)
• Input Offset Voltage: 1.5 mV
• Input Bias Current (max): 8 uA
• Operating Supply Voltage: 5 V, 9 V, 12 V, 15 V, 18 V
• Supply Current: 0.3 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 24 V
• Supply Voltage (min): 4 V
• No. Of Amplifiers: 1
• Input Bias Current: 8µA
• Output Current Per Channel: 60mA
• Gain Db Max: 20dB
• Bandwidth: 500kHz
• Cmrr: 105dB
• Supply Voltage Range: 4V
• Rohs Compliant: Yes
• For Use With: 497-8339 - BOARD EVAL BASED ON TSC101
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Gain Bandwidth Product: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6945-2; TSC101AILT

Application information
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Application information
The TSC101 can be used to measure current and to feed back the information to a
microcontroller, as shown in
Figure 23. Typical application schematic
The current from the supply flows to the load through the R
drop equal to V
inverting input voltage is equal to V
input to the same voltage as the inverting input. As a consequence, the amplifier adjusts
current flowing through Rg1 so that the voltage drop across Rg1 exactly matches V
Therefore, the drop across Rg1 is:
If I
The I
negligible). Therefore, the voltage drop on the R
Because the voltage across the R
expressed as:
The resistor ratio R
to 100V/V for TSC101C.
The R
because they define the full scale output range of your application. Therefore, they must be
selected carefully.
Rg1
2.8V to 30V
V
I
V
V
Rg1
Rg1
out
Rg1
Rg3
is the current flowing through Rg1, then I
sense
=(R
=V
current flows entirely into resistor R
=V
=R
sense
resistor and the R
g3
sense
g3
/R
.I
Gnd
sense
Rg3
Rg1
/Rg1
g1
=R
Rg1
).V
V
g3
=(R
p
sense
across R
/R
sense
g3
g1
R
V
/R
sense
.I
sense
is internally set to 20V/V for TSC101A, to 50V/V for TSC101B and
load
or V
g1
Figure
).V
sense
Rg2
g3
V
out
sense
m
/R
=(R
g3
. The amplifier input currents are negligible, therefore its
m
g1
23.
. The amplifier's open-loop gain forces its non-inverting
resistor is buffered to the Out pin, V
g3
resistor ratio (equal to A
TSC101
/R
V
g1)
CC
Out
.R
g3
sense
I
(the input bias current of the buffer is
Rg1
load
g3
load
resistor can be calculated as follows:
is given by the formula:
.I
load
V
out
sense
v
) are important parameters
resistor causing a voltage
ADC
V
Gnd
CC
out
Microcontroller
5V
can be
V
reg
sense
TSC101
.