User Manual for ST models including: STEVAL-AETKT2V1, Evaluation Kit for High Precision Bidirectional Current Sense Amplifiers

Getting started with the STEVAL-AETKT2V1 evaluation kit for high precision bidirectional current sense amplifiers - User manual Getting started with the STEVAL-AETKT2V1 evaluation kit for high precision bidirectional current sense amplifiers

The STEVAL-AETKT2V1 evaluation kit implements bidirectional current sense amplifiers by placing a sense resistor either in the high side or in the low side.

STMICROELECTRONICS

Getting started with the STEVAL-AETKT2V1 evaluation kit for ...

User manual. UM2859 - Rev 1 - June 2021. For further information contact your local STMicroelectronics sales office. www.st.com ...

Getting started with the STEVAL-AETKT2V1 evaluation kit ...

User manual UM2859 - Rev 1 - June 2021 For further information contact your local STMicroelectronics sales office. www.st.com. STEVAL-AETKT2V1. STEVAL-AETKT2V1. 1 Getting started. 1.1 Overview • Input common mode voltage: 26 V • Offset voltage: ±35 μV (±100 μV) max. • Offset drift: 0.1 µV/°C max.

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UM2859
User manual
Getting started with the STEVAL-AETKT2V1 evaluation kit for high precision bidirectional current sense amplifiers
Introduction
The STEVAL-AETKT2V1 evaluation kit implements bidirectional current sense amplifiers by placing a sense resistor either in the high side or in the low side. The STEVAL-AETKT2V1 kit consists of a mother board and two different daughter boards for different gain configurations. TSC21x family implements zero drift technology and is specially designed to accurately measure current by amplifying the voltage across a shunt resistor connected to its input. The voltage drop (Vsense) is then amplified by an amplifier. Thanks to the use of thin film resistors, TSC21x offers an extremely precise gain and very high CMRR performance. Moreover, thanks to the possibility of fixing the output common mode voltage through a reference pin, the TSC21x can be either used as unidirectional or bidirectional current sensing amplifier.
Figure 1. STEVAL-AETKT2V1 evaluation kit

UM2859 - Rev 1 - June 2021 For further information contact your local STMicroelectronics sales office.

www.st.com

1
1.1
1.2
Note:

UM2859
Getting started

Getting started

Overview
· Input common mode voltage: 26 V · Offset voltage: ±35 V (±100 V) max. · Offset drift: 0.1 µV/°C max. · Gain drift: 20 ppm/°C max. · 2.7 to 26 V supply voltage · Quiescent current: 100 A max. · SC70-6 and QFN10 (1.8 x 1.4 mm) package · Temperature range: -40 to 125°C · Gain configuration from 50 V/V to 1000 V/V · RoHS compliant

Shunt resistance

The STEVAL-AETKT2V1 offers the possibility of soldering a shunt resistance directly on the PCB. The board can host standard 2512 package size shunts on 4 W footprint optimized for minimal reading error.
You can choose the appropriate shunt package and value for your own application. If the chosen shunt is not compatible with the footprint, it has be connected outside the evaluation kit.
The selection of the shunt resistor is a tradeoff between dynamic range and power dissipation. Generally, in high current sensing applications, the focus is to reduce as much as possible the power dissipation (I²R) by choosing a shunt with the smallest value.
The recommended shunt value is obtained from the following equation:

Rsense =

VoutMax - Vol Gain  1 + Errorgain

- 2  Vio



1 Irange

(1)

Where VoutMax is the maximum output voltage usually equal to the device VCC or the ADC connected to the output, Vol is the output low swing value for the TSC21x family (in this case, it is 30 mV), Gain is the gain of the selected device (for example, TSC213 has a gain of 50), ERRORgain equals to 1%, Vio represents the input offset voltage (100 µV can be considered for TSC213), Irange is the actual range to be measured.

It is recommended to take a bit smaller shunt value to have some margin and prevent saturation.

The actual current range is calculated by the following equations:

ImaxPositive

=

VoutMax - Vref RSunt  Gain

(2)

ImaxNegative

=

Vref - VoutMin RSunt  Gain

(3)

Table 1. Examples of current ranges with 3mOhm shunt over different gain, VCC and Vref values

Device TSC213

VCC (V) 3.3 5

Vref (V) 2.5 2.5

4.66 16

Range Ipositive (A)

Range INegative (A) -16 -16

3.3

2.5

1.16

-4

TSC210

5

2.5

4

-4

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UM2859
Connection

1.3

Connection

The STEVAL-AETKT2V1 evaluation kit can be connected to the application design via J1 header.

Table 2. J1 pin-out description

J1 pin REF VCC GND OUT

Description Output or input voltage reference (see Section 1.4 Voltage reference settings) Supply voltage Ground TSC21x analog output value

1.4
Important:

Voltage reference settings
As the TSC21x family devices can measure current in both directions, some voltage reference has to be provided. Voltage reference can be generated directly on the STEVAL-AETKT2V1 evaluation kit by a precision op-amp or by shunt voltage reference. Another option is to use an external reference voltage source. Refer to the following table for proper jumper settings.
Only one jumper at a time can be placed on the kit.

Table 3. Voltage reference J2A and J2B jumper settings

J2A

J2B

Functionality

NA

GND

Unidirectional

NA

VCC

Unidirectional Inverted

REF1

NA

Vref generated by op-amp TSB711 (default Vcc/2)(1)

REF2

NA

Vref generated by shunt reference TS431 (default 1.24V)(1)

REF1 or REF2

GND or VCC

Not allowed(2)

NA

NA

External voltage reference provided from J1

1. The reference voltage value can be adjusted by resistor values. 2. IC components might be damaged

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UM2859 - Rev 1

2

Schematic diagrams

Figure 2. STEVAL-AETKT2V1 main board (STEVAL-AET011V1B) circuit schematic

The STEVAL-AET011V1B board is not available for separate sale

VCC C1

GND
D3 SMA4F18A
P1 1 2
TERMINAL
D4 SMA4F18A

D2 BAT54S

GND

R1 0R Rs 3m
R2 0R

C4 NC Vin+
C5 NC
VinC6 NC

1µF

C2

GND

100nF REF

VCC

C7

J2B

100pF

4 IN+ 5 IN-

2 GND

VCC 3 REF 1

U1 TSC21x

OUT 6

Vo R3 1k

GND
Out
C3 1nF

GND

GND

VCC REF Out J1
GND

GND

GND

D1 SMA4F18A

VCC

R4 100k
R5 100k

2

VCC

U3

3

5

TSB711

V+ 1

4 V-

REF_1

GND

GND

VCC R6
2k

REF_2
R7 0R
D5 TS431 R8 NC
GND

REF_1 REF REF_2
J2A

Vin+ 4 IN+ Vin- 5 IN-

VCC

REF
U2 TSC21xDB

VCC 3 VREF 1

OUT 6

Vo

2 GND

GND Mini spring socket for Daughter Board

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Schematic diagrams

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UM2859 - Rev 1

Figure 3. STEVAL-AETKT2V1 daughter board (STEVAL-AET012V1B) circuit schematic

The STEVAL-AET012V1B board is not available for separate sale
VCC

VCC 3 REF 1 ref

in+

4 IN+

U1 TSC213

OUT 6 out

in-

5 IN-

VCC
C1 22n

2 GND

GND

VCC 3 VREF 1 ref

VCC

in+ 4 IN+

in-

5 IN-

U2 DIP6
OUT 6 out

GND

2 GND

GND

Figure 4. STEVAL-AETKT2V1 daughter board (STEVAL-AET013V1B) circuit schematic

The STEVAL-AET013V1B board is not available for separate sale
VCC

VCC 3 REF 1 ref

in+

4 IN+

U1 TSC210

OUT 6 out

in-

5 IN-

VCC
C1 22n

2 GND

GND

VCC 3 VREF 1 ref

VCC

in+ 4 IN+

in-

5 IN-

U2 DIP6
OUT 6 out

GND

2 GND

UM2859
Schematic diagrams

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GND

UM2859
Bill of materials

3

Bill of materials

Item 1 2 3

Q.ty 1 1 1

Ref.
Table 5. STEVALAET011V1B
Table 6. STEVALAET012V1B
Table 7. STEVALAET013V1B

Table 4. STEVAL-AETKT2V1 bill of materials

Part/Value

Description

Manufacturer

Order code

Main board

ST

Not available for separate sale

Daughter board ST

Not available for separate sale

Daughter board ST

Not available for separate sale

Table 5. STEVAL-AET011V1B bill of materials

The STEVAL-AET011V1B board is supplied with the kit and is not available for separate sale

Item

Q.ty

Ref.

Part/Value

Description Manufacturer

Order code

1

1

P1

1x2, 5.08mm

Terminal Block for PCB

CUI devices

TB009-508-02BE

2

6

U2

DIP6, - 6x 6-5330808-5 TE DIP 6

Mini spring socket

TE Connectivity / AMP

6-5330808-5

3

2

R1, R2

0 R, 0603

Resistors

Vishay/Dale

CRCW06030000Z0EAC

4

1

R7

0R, 0805

Resistor

Vishay/Dale

CRCW08050000Z0EAC

5

2

R4, R5

100 k, 0805, 100 V, ±1%

Resistors

Vishay/Dale

CRCW0805100KFKEA

100 nF, 0805,

6

1

C2

50 V, ±10%,

Capacitor

KEMET

C0805C104K5RACTU

X7R

100pF, 0805,

7

1

C7

50V, ±10%,

Capacitor

KEMET

C0805C101K5GACTU

C0G/NP0

1 k, 0805, 100

8

1

R3

V, 100 mW, ±1%, ±100

Resistor

Vishay/Dale

CRCW08051K00FKEA

ppm/K

1 nF, 0805, 50

9

1

C3

V, ±10%,

Capacitor

KEMET

C0805C102K5GACTU

C0G/NP0

10

1

C1

1 µF, 0805, 50 V, ±10%, X7R

Capacitor

KEMET

C0805C105K5RACTU

11

1

2 k, 0805, 100

R6

V, ±1%, 100 mW, ±100

Resistor

Vishay/Dale

CRCW08052K00FKEA

ppm/K

12

1

Power metal

Rs

3m, 2512 Shunt 4 W improved

strip resistors, surface mount, 4-terminal (not

Bourns

CSS2H-2512K-3L00FE

assembled)

13

1

40 V, 300 mA

D2

BAT54S, SOT-23

general purpose signal Schottky

ST

BAT54SFILM

diode

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UM2859
Bill of materials

Item 14 15 16 17 18 19
20
21

Q.ty 2 1 1 3 3 1
1
1

Ref. J2A, J2B J1 R8 C4, C5, C6 D1, D3, D4 D5
U3
U1

Part/Value

Description Manufacturer

Order code

Header 3, HDR1X3 , step 2.54 mm

Connector M/ 1 row

Wurth Elektronik 61300311121

Header 4, HDR1X4, step 2.54 mm

Connector M/ 1 row

Wurth Elektronik 61300411121

NC, 0805, ±1%, 75 V, 100 mW, ±100 ppm/K

Resistor (not assembled)

Any

NC, 0603, 50 V, ±10%

Ceramic capacitor (not assembled)

Any

SMA4F18A, SMA Flat

400 W TVS in SMA Flat

ST

SMA4F18A

TS431, SOT-23-5, ±5%

Adjustable shunt voltage reference IC

ST

TS431BILT

TSB711, SOT-23-5

Precision, 6

MHz, RR IO, 36

V BiCMOS

ST

operational

amplifier

TSB711ILT

TSC21x, SC70-6

High/low-side, bidirectional, zero-drift current ST sense amplifier (not assembled)

TSC21x

Table 6. STEVAL-AET012V1B bill of materials

The STEVAL-AET012V1B board is supplied with the kit and is not available for separate sale

Item

Q.ty

Ref.

Part/Value

Description Manufacturer

Order code

1

1

C1

22 n, 0603, 50 V,±10%, X7R

Capacitor (not mounted)

KEMET

C0603C223K5RACTU

2

2

U2

DIP6 - 2x TS-103-T-A, 1x3, 2.54 mm

Precision header

Samtec

TS-103-T-A

High/low-side,

3

1

U1

TSC213, SC70-6

bidirectional, zero-drift current

ST

TSC213ICT

sense amplifier

Table 7. STEVAL-AET013V1B bill of materials

The STEVAL-AET013V1B board is supplied with the kit and is not available for separate sale

Item

Q.ty

Ref.

Part/Value

Description Manufacturer

Order code

1

1

C1

22 n, 0603, 50 V,±10%, X7R

Capacitor (not assembled)

KEMET

C0603C223K5RACTU

2

2

U2

DIP6 - 2x TS-103-T-A, 1x3, 2.54 mm

Precision header

Samtec

TS-103-T-A

High/low-side,

3

1

U1

TSC210, SC70-6

bidirectional, zero-drift current

ST

TSC210ICT

sense amplifier

UM2859 - Rev 1

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Revision history
Date 08-Jun-2021

UM2859

Table 8. Document revision history

Revision 1

Initial release.

Changes

UM2859 - Rev 1

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UM2859
Contents
Contents
1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Shunt resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.4 Voltage reference settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 List of figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

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UM2859
List of tables

List of tables

Table 1.
Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8.

Examples of current ranges with 3mOhm shunt over different gain, VCC and Vref values . . . . . . . . . . . . . . . . . . . 2 J1 pin-out description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Voltage reference J2A and J2B jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 STEVAL-AETKT2V1 bill of materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 STEVAL-AET011V1B bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 STEVAL-AET012V1B bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 STEVAL-AET013V1B bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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UM2859
List of figures

List of figures

Figure 1. Figure 2. Figure 3. Figure 4.

STEVAL-AETKT2V1 evaluation kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 STEVAL-AETKT2V1 main board (STEVAL-AET011V1B) circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 STEVAL-AETKT2V1 daughter board (STEVAL-AET012V1B) circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . 5 STEVAL-AETKT2V1 daughter board (STEVAL-AET013V1B) circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . 5

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UM2859
IMPORTANT NOTICE ­ PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST's terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers' products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2021 STMicroelectronics ­ All rights reserved

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