L9780

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Wide range air fuel sensor control interface

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  • L9780 is an IC designed to interface a variety of wide range air fuel sensors.

    The device manages the oxygen pump of the wide range air fuel sensor by means of a voltage controlled current source (VCCS). The reference for the VCCS is generated by a PI controller with external compensation network in order to adapt the device to different sensors. The user can choose between two different networks using the SPI interface. L9780 is fully compatible with most sensors on the market.
    The internal timing state machine automatically manages all the operations needed for a right sequencing of the measurement process. All the main time values can be configured by SPI.
    L9780 drives also an external FET used to control the sensor heater. The device protects the sensor and all the I/O against shorts and provides the diagnosis by SPI.

    Key Features

    • Voltage controlled current source (VCCS) pump cell driver with selectable voltage clamp, offset compensation, diagnostic (short to battery) and 2 output channels
    • Impedance measurement of reference cell
    • 10-bit multiplexed A/D converter
    • Scaling amplifier with sample & hold and offset compensation
    • Control voltage amplifier with sample & hold and offset compensation
    • Synchronous or asynchronous functionality selectable via SPI
    • Heater FET driver with diagnostic (short to battery, short to ground, open circuit)
    • 4 possible levels for clean current
    • SPI with fault detection
    • Digital input and outputs compatible with 5 V or 3.3 V voltage supply
    • 2 channels available to connect compensation networks
    • Short to battery diagnostic on functional ground (pin SR)
    • Short to battery/ground diagnostic on voltage from reference cell (pin INRC)
    • -5 V internal supply
    • 4 MHz internal oscillator
    • Package: 48 pin LQFP
    • Technology: BCD5s_70 V

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Quantity
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Package
Packing Type
Temperature (°C) ECCN (US)
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L9780TR
Active
1000 3.9 LQFP 48 7x7x1.4 Tape And Reel -40 125 EAR99
MORE INFO

Country of Origin:

-

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Distributor availability ofL9780TR

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Region Stock Min. Order Third party link
ARROW AMERICA 2400 2400 Order Now

Distributor reported inventory date: 2019-12-10

Distributor Name

ARROW

Stock

2400

Min.Order

2400

Region

AMERICA Order Now

Distributor reported inventory date: 2019-12-10

L9780
Active
1000 3.9 LQFP 48 7x7x1.4 Tray -40 125 EAR99
MORE INFO

Country of Origin:

-

No availability of distributors reported, please contact our sales office

L9780TR

Marketing Status

Active

Quantity

1000

Unit Price (US$)

3.9*

Distributor availability ofL9780TR

Distributor Name
Region Stock Min. Order Third party link
ARROW AMERICA 2400 2400 Order Now

Distributor reported inventory date: 2019-12-10

Distributor Name

ARROW

Stock

2400

Min.Order

2400

Region

AMERICA Order Now

Distributor reported inventory date: 2019-12-10

Unit Price (US$)

3.9

Package

LQFP 48 7x7x1.4

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

125

ECCN (US)

EAR99

Country of Origin

-

L9780

Marketing Status

Active

Quantity

1000

Unit Price (US$)

3.9*

Unit Price (US$)

3.9

Package

LQFP 48 7x7x1.4

Packing Type

Tray

Operating Temperature (°C)

(min)

-40

(max)

125

ECCN (US)

EAR99

Country of Origin

-

(*) 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

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS10339
      Wide range air fuel sensor control interface
      3.0
      868.4 KB
      PDF
      DS10339

      Wide range air fuel sensor control interface

Publications and Collaterals

    • Description Version Size Action
      Smart power solutions for car body applications 4.0
      3.38 MB
      PDF

      Smart power solutions for car body applications

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9780
Active
LQFP 48 7x7x1.4 Automotive Ecopack2
L9780TR
Active
LQFP 48 7x7x1.4 Automotive Ecopack2

L9780

Package:

LQFP 48 7x7x1.4

Material Declaration**:

PDF

Marketing Status

Active

Package

LQFP 48 7x7x1.4

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9780TR

Package:

LQFP 48 7x7x1.4

Material Declaration**:

PDF

Marketing Status

Active

Package

LQFP 48 7x7x1.4

Grade

Automotive

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.

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