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TPIC8101TIN/a10avaiKnock Sensor Interface
TPIC8101DWTIN/a74avaiKnock Sensor Interface


TPIC8101DW ,Knock Sensor InterfaceFeatures 3 DescriptionThe TPIC8101 is a dual-channel signal processing IC1• Qualified for Automotiv ..
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TPIC8101-TPIC8101DW
Knock Sensor Interface
refMux SAR10-Bit ADC = 200 kHzS
<1:10>DD/ 2
SPI Test ModeDSP Control
CH1P
CH1N
CH1FB
CH2P
CH2N
CH2FB
Programmable
Gain
ProgrammableBand-PassFilter Rectifier ProgrammableIntegratorrd Order AAF
R2R = 200 kHz
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TPIC8101

SLIS110C –APRIL 2003–REVISED MARCH 2015
TPIC8101 Knock Sensor Interface Features 3 Description

The TPIC8101isa dual-channel signal processingIC Qualifiedfor Automotive Applications for detectionof premature detonationin combustion• AEC-Q100 Qualified With the Following Results: engine. The two sensor channels are selectable Device Temperature Grade1: –40°Cto 125°C through the SPI bus. The knock sensor typically
Ambient Operating Temperature Range provides an electrical signalto the amplifier inputs.
The sensed signal is processed through a– Device HBM Classification Level 3A programmable band-pass filter to extract the– Device CDM Classification Level C6 frequencyof interest (engine knockor ping signals). Dual-Channel Knock Sensor Interface The band-pass filter eliminates any engine
background noise associated with combustion. The• Programmable Input Frequency Prescaler engine background noiseis typically lowin amplitude(OSCIN) comparedto the predetonation noise.• Serial Interface With Microprocessor (SPI)
The detected signal is full-wave rectified and• Programmable Gain integratedby useof the INT/HOLD signal. The digital• Programmable Band-Pass Filter Center output from the integration stageis either convertedFrequency toan analog signal, passed through an output buffer, External Clock Frequenciesupto24 MHz or be read directlyby the SPI. 4,5,6,8, 10, 12, 16, 20, and24 MHz This analog buffered output may be interfacedto an
A/D converter and read by the microprocessor. The• Programmable Integrator Time Constants
digital output may be directly interfaced to the• Operating Temperature Range −40°Cto 125°C microprocessor. Applications Device Information(1) Engine Knock Detector Signal Processing Analog Signal Processing With Filter
Characteristics (1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Simplified Schematic
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