TSC1021 STMicroelectronics, TSC1021 Datasheet - Page 7

• Manufacturer Part Number: TSC1021
• Description: High side current sense amplifier
• Manufacturer: STMicroelectronics

Specifications of TSC1021

• Wide Common-mode Operating Range Independent Of Supply: 2.8 to 30 V
• Wide Common-mode Surviving Range: -32 to 60 V (reversed battery and load-dump conditions)
• Low Current Consumption: ICC max = 300 μA
• Internally Fixed Gain: 20 V/V, 50 V/V

TSC1021
5
5.1
5.2
5.3
5.4
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
V
Output voltage drift versus temperature
The output voltage drift versus temperature is defined as the maximum variation of V
respect to its value at 25°C, over the temperature range. It is calculated as follows:
with T
out
os
sense
can be calculated with the following formula.
vs. the V
min
= V
< T
sense1
amb
sense
= 50 mV and V
< T
curve with the X-axis. If V
V
max
os
ΔV out
---------------- -
.
ΔT
=
SVR
V
CMR
sense1
=
Doc ID 17857 Rev 1
=
max
out2
=
–
–
20
–
is the output voltage with V
⎛
⎝
V out Tamb
------------------------------------------------------------------------- -
20
V
----------------------------------------------- -
⋅
sense1
V
⋅
log
out1
(
log
---------------------------
ΔV
Tamb 25° C
------------------------------
ΔV
out1
ΔV
–
–
cc
V
V
ΔV
icm
out
) V out 25° C
⋅
sense2
out2
is the output voltage with
–
–
Av
out
⋅
Av
⋅
CC
os
(
V
. The SVR is referred back to the
out1
)
p
and V
⎞
⎠
)
sense
m
. The CMR is referred
= V
Parameter definitions
sense2
= 5 mV, then
out
with
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