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Bosch Semiconductors

CJ125

Control and amplifier circuit for wide range oxygen sensor Bosch LSU4.x

Application & Technical Summary

CJ125

CJ125 is the ideal companion for Bosch oxygen sensor LSU4.x. It includes all circuitry for accurate sensor operation.

CJ125 supports the continuous regulation of Lambda in the range of ʎ= 0.65 to ∞ (air).

Product benefits

  • Pump current control
  • Pump current sense amplifier
  • Lambda output amplifier
  • Nernst cell reference voltage source
  • Ri or Rical measurement for temperature control
  • Programmable reference pumping currents

Integrated heater stage diagnosis

Monitoring of external heater stage for short- circuit to Vbat, short-circuit to ground and open load

Technical Features

Type
Oxygen sensor control & evaluation IC
Package

  • SOIC24w
  • LQFP32

Features

  • Lambda measurement
  • Probe temperature measurement
  • Programmable reference pump current Diagnostics
  • Recommmended for new applications

Oxgen sensor type
Bosch LSU5.2 / 4.9 / ADV / 4.2
Interface
SPI
Tj min [°C]
-40°C
Tj max [°C]
150°C

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