CJ138 | Control and amplifier circuit with pin-pointing for wide range oxygen sensors

High-end oxygen sensor ASIC includes CARB pin-pointing capability, software configuration and ultimate accuracy

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.

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

技术特点


类型	集成安全气囊系统芯片
封装	TQFP128_ePad
特点	增强的复杂安全概念：安全控制器；3个看门狗；ESP传感器数据包括在安全概念中全自动诊断：电压 (包括 VHx) 和超温监控、SVR诊断，内置传感器测试、CER诊断、功率级和点火诊断、交叉耦合诊断、连接器电容器诊断、STB和STG诊断每条通道 2 个独立的 7bit 点火电流计数器 (最长时间: 3.2ms) PWM控制GPIO
点火回路	16x5种点火模式(包括1.2A 、1.75A和 LEA)
外围传感器接口	6 × PSI5 (V1.3)
模拟接口	10 x AIN, 2 x AIO
接口	SPI, 32-bit (3.3 V), K-Line/LIN
VDD typ. [V]	3.3
VVAS typ. [V]	6.7
VVZP typ. [V]	14
VVER typ. [V]	23.75 or 33 (programmable)
Tj min [°C]	-40°C
Tj max [°C]	150°C

TQFP_32ePad (7 × 7 mm)