TSC1021 STMicroelectronics, TSC1021 Datasheet

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TSC1021

Manufacturer Part Number
TSC1021
Description
High side current sense amplifier
Manufacturer
STMicroelectronics
Datasheet

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

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Features
Applications
September 2010
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)
Maximum input offset voltage:
– ±1.5 mV for T
– ±2.3 mV for -40
Maximum total output voltage error:
– ±1.5% for T
– ±2.5% for -40°C < T
Maximum variation over temperature:
– dV
– dV
Low current consumption: I
-40 to 125°C operating temperature range
Internally fixed gain: 20 V/V, 50 V/V
EMI filtering
Automotive current monitoring
Notebook computers
Server power supplies
Telecom equipment
Industrial SMPS
Current sharing
LED current measurement
os
out
/dT = 8 µV/°C
/dT = 100 ppm/°C
amb
amb
= 25°C
°C < T
= 25°C
amb
amb
CC
< 125°C
<
125
max = 300 µA
°C
Doc ID 17857 Rev 1
High-side current sense amplifier
Description
The TSC1021 measures a small differential
voltage on a high-side shunt resistor and
translates it into a ground-referenced output
voltage.
The TSC1021 has been specifically designed to
deal with automotive conditions: load-dump
protection up to 60 V, reverse-battery protection
up to -32 V, ESD protection up to 4 kV and
internal filtering for EMI performance.
Input common-mode and power supply voltages
are independent: the common-mode voltage can
range from 2.8 to 30 V in operating conditions and
up to 60 V in absolute maximum ratings while the
TSC1021 can be supplied by a 5 V independent
supply line.
The TSC1021 is housed in a tiny TSSOP8
package and integrates a buffer that provides low
impedance output to ease interfacing and avoid
accuracy losses. The overall device current
consumption is lower than 300 µA.
(Plastic package)
TSSOP8
TSC1021
www.st.com
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TSC1021 Summary of contents

Page 1

... V in operating conditions and absolute maximum ratings while the TSC1021 can be supplied independent supply line. The TSC1021 is housed in a tiny TSSOP8 package and integrates a buffer that provides low impedance output to ease interfacing and avoid accuracy losses ...

Page 2

... Application diagram 1 Application diagram The TSC1021 high-side current-sense amplifier features a 2 input common-mode range that is independent of the supply voltage. The main advantage of this feature is that it allows high-side current sensing at voltages much greater than the supply voltage (V Figure 1. Application schematic: high-line current sensing ...

Page 3

... TSC1021 2 Pin configuration Figure 2. Pin connections (top view) Table 1 describes the function of each pin. Their position is shown in the illustration on the cover page and in A1 Table 1. Pin description Pin number Symbol Gnd 3 Out 4 Figure 1 above. Type Connection for the external sense resistor. The ...

Page 4

... V p (1) thermal resistance junction to ambient and V pins p m (2) (3) (4) Parameter to T min max to T min max and V pins m p Doc ID 17857 Rev 1 TSC1021 Value Unit ±20 V ( -65 to 150 °C 150 °C 120 °C/W ( ...

Page 5

... T < °C amb -40 125 °C < T < °C amb sense -40 125 °C < T < °C amb TSC1021A ) TSC1021B sense sense ( 25° C amb T < T < T min amb max V = 100 mV sense ( 25° C amb T < T < T min ...

Page 6

... T < °C amb for a more detailed definition. Test conditions 100 mV, sense load 100 mV sense load kHz Doc ID 17857 Rev 1 TSC1021 Min. Typ. Max. Unit ±12 % ±15 ±0.4 ±2 mV/mA 90 135 mV 185 80 125 mV 165 = ...

Page 7

... TSC1021 5 Parameter definitions 5.1 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: 5 ...

Page 8

... The actual value is very slightly different, mainly due to the effects of: ● the input offset voltage V ● the non-linearity, ● the voltage saturation of V The output voltage accuracy, expressed as a percentage, can be calculated with the following formula. with V/V for TSC1021A and V/V for TSC1021B. 8/12 ⋅ V out- sense , os and V ...

Page 9

... TSC1021 6 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Figure 3. TSSOP8 package mechanical drawing Table 7. ...

Page 10

... Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent are ongoing. 10/12 Temperature range Package -40°C, +125°C TSSOP8 -40°C, +125°C (1) e Automotive grad Doc ID 17857 Rev 1 TSC1021 Packaging Marking Gain O21AI O21BI Tape & reel O21AY O21BY ...

Page 11

... TSC1021 8 Revision history Table 9. Document revision history Date 23-Sep-2010 Revision 1 Initial release. Doc ID 17857 Rev 1 Revision history Changes 11/12 ...

Page 12

... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 12/12 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 17857 Rev 1 TSC1021 ...

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