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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.主要特性
- 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
样片和购买
| 产品型号 | 供货状态 | 数量 | 预算价格(US$) | 封装 | 包装类型 | 温度（ºC） | ECCN (US) | Country of Origin | 更多信息 | 从分销商订购 | 从ST订购 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L9780TR | 批量生产 | 1000 | 3.9 | LQFP 48 7x7x1.4 | Tape And Reel | -40 | 125 | EAR99 | MALAYSIA | 查看供货情况 | ||
| L9780 | 批量生产 | 1000 | 3.9 | LQFP 48 7x7x1.4 | Tray | -40 | 125 | EAR99 | MALAYSIA | 查看供货情况 | 立即购买 | |
L9780TR
供货状态
批⁠量⁠生⁠产数量
1000单价(US$)
3.9*| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L9780 | 批量生产 | LQFP 48 7x7x1.4 | Automotive | Ecopack2 | |
| L9780TR | 批量生产 | LQFP 48 7x7x1.4 | Automotive | Ecopack2 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
