TSC101 STMicroelectronics, TSC101 Datasheet - Page 11

• Manufacturer Part Number: TSC101
• Description: High side current sense amplifier
• Manufacturer: STMicroelectronics

Specifications of TSC101

• Wide Common-mode Operating Range: 2.8 to 30 V
• Wide Common-mode Surviving Range: -0.3 to 60 V (load-dump)
• Wide Supply Voltage Range: 4 to 24 V
• Low Current Consumption: ICCmax = 300 μA
• Internally Fixed Gain: 20 V/V, 50 V/V or 100 V/V

TSC101
4
4.1
4.2
4.3
Parameter definitions
Common mode rejection ratio (CMR)
The common-mode rejection ratio (CMR) measures the ability of the current-sensing
amplifier to reject any DC voltage applied on both inputs V
back to the input so that its effect can be compared with the applied differential signal. The
CMR is defined by the formula:
Supply voltage rejection ratio (SVR)
The supply-voltage rejection ratio (SVR) measures the ability of the current-sensing
amplifier to reject any variation of the supply voltage V
input so that its effect can be compared with the applied differential signal. The SVR is
defined by the formula:
Gain (Av) and input offset voltage (V
The input offset voltage is defined as the intersection between the linear regression of the
V
V
can be calculated with the following formula:
The amplification gain A
voltage:
out
sense
versus V
=V
sense1
sense
=50mV and V
curve with the X-axis (see
V
os
v
=
is defined as the ratio between output voltage and input differential
SVR
V
CMR
sense1
out2
Doc ID 13313 Rev 3
=
is the output voltage with V
=
–
–
Av
20
–
⎛
⎝
20
V
----------------------------------------------- -
⋅
=
sense1
V
⋅
log
----------------- -
V
out1
log
V
sense
----------------------------- -
ΔV
out
------------------------------
ΔV
–
–
ΔV
CC
Figure
V
V
ΔV
icm
sense2
out2
out
⋅
out
⋅
Av
Av
20). If V
⋅
CC
os
V
. The SVR is referred back to the
out1
)
p
and V
sense
out1
⎞
⎠
is the output voltage with
=V
m
. The CMR is referred
sense2
Parameter definitions
=5mV, then V
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os