TSC101 STMicroelectronics, TSC101 Datasheet

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TSC101

Manufacturer Part Number
TSC101
Description
High side current sense amplifier
Manufacturer
STMicroelectronics
Datasheet

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

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Features
Applications
Description
The TSC101 measures a small differential voltage
on a high-side shunt resistor and translates it into
a ground-referenced output voltage. The gain is
internally fixed.
Wide input common-mode voltage range, low
quiescent current, and tiny SOT23 packaging
enable use in a wide variety of applications.
March 2011
Independent supply and input common-mode
voltages
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: I
Internally fixed gain: 20 V/V, 50 V/V or 100 V/V
Buffered output
Automotive current monitoring
Notebook computers
DC motor controls
Photovoltaic systems
Battery chargers
Precision current sources
CC
max = 300 µA
Doc ID 13313 Rev 3
High side current sense amplifier
The 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
rating conditions.
The current consumption below 300 µA and the
wide supply voltage range enable the power
supply to be connected to either side of the
current measurement shunt with minimal error.
Gnd
Out
Vp
1
2
3
Pin connections
(Plastic package)
(top view)
SOT23-5
L
5
4
TSC101
Vcc
Vm
www.st.com
1/18
18

TSC101 Summary of contents

Page 1

... Photovoltaic systems ■ Battery chargers ■ Precision current sources Description The TSC101 measures a small differential voltage on a high-side shunt resistor and translates it into a ground-referenced output voltage. The gain is internally fixed. Wide input common-mode voltage range, low quiescent current, and tiny SOT23 packaging enable use in a wide variety of applications ...

Page 2

... Application schematics and pin description 1 Application schematics and pin description The TSC101 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 ...

Page 3

... TSC101 2 Absolute maximum ratings and operating conditions Table 2. Absolute maximum ratings Symbol V Input pins differential voltage ( Input pin voltages ( supply voltage output pin voltage out T Storage temperature stg T Maximum junction temperature j R SOT23-5 thermal resistance junction to ambient ...

Page 4

... Doc ID 13313 Rev 3 Min. Typ. Max. 165 300 = mV load sense Min. Typ. Max. 90 105 90 105 ±0.2 ±1.5 ±0.9 ± load sense TSC101 Unit µA Unit µV/°C µA µA ...

Page 5

... Unless otherwise specified, the test conditions are T Out. 2. See Output voltage drift versus temperature on page 12 3. Output voltage accuracy is the difference with the expected theoretical output voltage V See Output voltage accuracy on page 13 Test conditions TSC101A TSC101B TSC101C T = 25°C amb T < T < T min amb max ...

Page 6

... load TSC101A TSC101B TSC101C 100 mV sense ( load V = 100 mV sense TSC101A TSC101B TSC101C = 25° amb CC Test conditions = 25° amb CC Doc ID 13313 Rev 3 Min. Typ. Max 0.55 0.9 500 670 ...

Page 7

... TSC101 3.1 Electrical characteristics curves For the following curves, the tested device is a TSC101C, and the test conditions are T = 25°C, V amb CC otherwise specified. Figure 2. Supply current vs. supply voltage ( sense Figure 4. V pin input bias current vs mV, V ...

Page 8

... Minimum common mode operating voltage vs. temperature Figure 8. Output stage high-state saturation voltage versus output current ( sense 8/18 Figure 7. Output stage low-state saturation voltage versus output current (V sense Figure 9. Output short-circuit source current versus temperature (Out pin connected to ground) Doc ID 13313 Rev 3 TSC101 = -1 V) ...

Page 9

... TSC101 Figure 10. Output short-circuit sink current versus temperature (Out pin connected Figure 12. Input offset drift versus temperature Figure 14. Bode diagram (V Figure 11. Output stage load regulation ) Figure 13. Output voltage drift versus =100mV) Figure 15. Power-supply rejection ratio versus sense Doc ID 13313 Rev 3 ...

Page 10

... Electrical characteristics Figure 16. Total output voltage accuracy versus V sense Figure 18. Output voltage versus V for low V values) sense 10/18 Figure 17. Output voltage versus V (detail Figure 19. Step response sense Doc ID 13313 Rev 3 TSC101 sense ...

Page 11

... TSC101 4 Parameter definitions 4.1 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: 4 ...

Page 12

... V Figure 21. Output voltage drift versus temperature 12/18 versus V characteristics: detail for low V sense ΔV out ( V out T amb ---------------- - = max ------------------------------------------------------------------------- - ΔT T amb < max versus T. out Doc ID 13313 Rev 3 values sense ) V out 25° – – 25° C TSC101 with out ...

Page 13

... The output voltage accuracy, expressed in percentage, can be calculated with the following formula: with V/V for TSC101A sense , os vs. V theoretical and actual characteristics sense ( abs V – out ΔV = ------------------------------------------------------------------------- - ⋅ out V/V for TSC101B and A v Doc ID 13313 Rev 3 Parameter definitions ⋅ sense V sense = 100 V/V for TSC101C. v 13/18 ...

Page 14

... Application information 5 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 sense inverting input voltage is equal to V input to the same voltage as the inverting input consequence, the amplifier adjusts ...

Page 15

... TSC101 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 24. SOT23-5L package mechanical drawing Table 9. ...

Page 16

... TSC101AILT TSC101BILT -40°C, +125°C TSC101CILT (1) TSC101AIYLT (1) TSC101BIYLT -40°C, +125°C (1) TSC101CIYLT 1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent. 16/18 Package Packaging SOT23-5 Tape & reel SOT23-5 Tape & reel (Automotive grade) ...

Page 17

... TSC101 8 Revision history Table 11. Document revision history Date 05-Mar-2007 22-Oct-2007 14-Mar-2011 Revision 1 First release, preliminary data. Document status promoted from preliminary data to datasheet. 2 Added test results in electrical characteristics tables. Added electrical characteristics curves. Added ESD charged device model values in maximum ratings. ...

Page 18

... 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 18/18 Please Read Carefully: © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 13313 Rev 3 TSC101 ...

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