Low-side current sensing evaluation board based on the TSZ121 op amp

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  • The STEVAL-ISQ014V1 product evaluation board implements low-side current sensing which consists in placing a sense resistor between the load and the circuit ground. The resulting voltage drop is amplified using a TSZ121 op amp.

    The common mode voltage is close to ground, whatever the voltage of the power source, so the current sense voltage can be amplified by this low voltage op amp without restriction.
    The circuit offers very stable electrical characteristics over the entire supply voltage range and is particularly suited for automotive and industrial applications.
    Thanks to the highly accurate TSZ121 op amp, precise current measurements can be made through your application without the added cost of high-precision resistors.

    Key Features

    • Very high accuracy: offset voltage 5 μV max at 25 °C, 8 μV over full temperature range (-40 °C to 125 °C)
    • Rail-to-rail input and output
    • Low supply voltage: 1.8 - 5.5 V
    • Low power consumption: 40 μA max. at 5 V
    • Gain bandwidth product: 400 kHz
    • High tolerance to ESD: 4 kV HBM
    • Extended temperature range: -40 to +125 °C
    • Micro-packages: SC70-5 (TSZ121), DFN8 2x2 (TSZ122), and QFN16 3x3 (TSZ124)
    • RoHS compliant

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Part Number
Core Product
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
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STEVAL-ISQ014V1 TSZ121
Active
36.0 1 EAR99 ITALY Check Availability

Distributor availability ofSTEVAL-ISQ014V1

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2 1 Order Now

Distributor reported inventory date: 2019-10-13

Distributor Name

MOUSER

Stock

2

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-10-13

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STEVAL-ISQ014V1

Core Product

TSZ121

Marketing Status

Active

Unit Price (US$)

36.0*

Distributor availability ofSTEVAL-ISQ014V1

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2 1 Order Now

Distributor reported inventory date: 2019-10-13

Distributor Name

MOUSER

Stock

2

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-10-13

Unit Price (US$)

36

Quantity

1

ECCN (US)

EAR99

Country of Origin

ITALY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Technical Documentation

    • Description Version Size Action
      DB2325
      Low-side current sensing evaluation board based on the TSZ121 op amp
      1.0
      206.84 KB
      PDF
      DB2325

      Low-side current sensing evaluation board based on the TSZ121 op amp

    • Description Version Size Action
      UM1737
      How to use the product evaluation board STEVAL-ISQ014V1 for low-side current sensing with the TSZ121 operational amplifier
      1.0
      474.34 KB
      PDF
      UM1737

      How to use the product evaluation board STEVAL-ISQ014V1 for low-side current sensing with the TSZ121 operational amplifier

Hardware Resources

    • Description Version Size Action
      STEVAL-ISQ014V1 gerber files 1.0
      25.4 KB
      ZIP

      STEVAL-ISQ014V1 gerber files

    • Description Version Size Action
      STEVAL-ISQ014V1 BOM 1.0
      7.77 KB
      PDF

      STEVAL-ISQ014V1 BOM

    • Description Version Size Action
      STEVAL-ISQ014V1 schematics 1.0
      61.11 KB
      PDF

      STEVAL-ISQ014V1 schematics

Legal

    • Description Version Size Action
      Evaluation products license agreement 1.6
      74.12 KB
      PDF

      Evaluation products license agreement

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-ISQ014V1
Active
CARD Industrial Ecopack2 -

STEVAL-ISQ014V1

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.