製品概要
概要
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.
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All 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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STMicroelectronics - L9780
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHSコンプライアンスグレード | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| L9780 | Active 交換品交換品 | LQFP 48 7x7x1.4 mm | Automotive | Ecopack2 | - | - | |
| L9780TR | Active 交換品交換品 | LQFP 48 7x7x1.4 mm | Automotive | Ecopack2 | - | - |
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
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Sample & Buy
| Part Number | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小 | 最大 | |||||||||||||
| L9780TR | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください | |||||||||||
| L9780 | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください | |||||||||||
L9780TR Active
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
L9780 Active
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
（*）概算用の参考価格（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。