CJ138 - Control and amplifier circuit with pin-pointing for wide range oxygen sensors
Suitable for oxygen sensors by Bosch, NTK or DENSO
Application & Technical Summary
CJ138 controls linear 1 or 2 cell linear oxygen sensors inside an engine control unit (ECU) for Gasoline or Diesel engines.
The IC can interface with various sensors by configuring the corresponding registers. It also supports CARB sensor pin-pointing diagnostics for engine control applications.
Accuracy is the same as CJ135 and CJ136 due to sensor resistance measurement and heating regulation to keep sensor temperature at a constant level.
Product benefits
- General interface for use with 1 or 2 cell linear oxygen sensors with the same HW module
- Sensor type selectable via software
- Pin-pointing diagnosis capability
- Package and pin compatible to CJ135 / CJ136
High-end oxygen sensor ASIC
Includes CARB pin-pointing capability, software configuration and ultimate accuracy
Technical Features
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Type
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Oxygen sensor control & evaluation IC
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Package
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Features
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Oxgen sensor type
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Interface
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In: IP, Nernst voltage
Out: Voltage digital on SPI and UART |
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Tj min [°C]
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-40°C
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Tj max [°C]
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150°C
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TQFP_32ePad (7 × 7 mm)
