Overview
The TPIC8101DWR, produced by Texas Instruments, is a dual-channel signal processing IC designed for the detection of premature detonation in combustion engines. This device serves as an interface between acoustical sensors or accelerometers and the engine management systems of gasoline engines. It features programmable settings for engine knock detection sensitivity, engine resonance frequency, clock synchronization frequency, and sampling rate control of the on-board ADC and DAC. This flexibility allows the TPIC8101DWR to adapt to various cost and processing time constraints.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| VDD (max.) | Maximum supply voltage | 7 V |
| Operating Voltage (VDD) | Operating supply voltage | 5 V ± 0.25 V (± 5%) |
| IDDQ (max.) | Maximum quiescent current | 7.5 mA |
| IDD (max.) | Maximum operating current | 20 mA |
| Fs (Typ.) | Typical sampling frequency | 200 kHz |
| ADC Resolution (min.) | Minimum ADC resolution | 10 bits |
| Operating Temperature Range | Operating temperature range | –40°C to 125°C |
| DC Input Voltage on Sensor Terminals | Maximum DC input voltage on CH1P, CH1N, CH2P, CH2N | 14 V |
| Thermal Impedance Junction to Ambient | Thermal impedance junction to ambient | 120°C/W |
| Continuous Power Dissipation | Maximum continuous power dissipation | 200 mW |
| Electrostatic Discharge Susceptibility | Electrostatic discharge susceptibility | 2 kV (HBMESD) |
Key Features
- Dual-Channel Knock Sensor Interface
- Programmable Input Frequency Prescaler (OSCIN)
- Serial Interface With Microprocessor (SPI)
- Programmable Gain (up to 64 values ranging from 0.111 to 2.0)
- Programmable Band-Pass Filter Center Frequency (1.22 kHz to 19.98 kHz)
- External Clock Frequencies up to 24 MHz (4, 5, 6, 8, 10, 12, 16, 20, and 24 MHz)
- Programmable Integrator Time Constants
Applications
- Engine Knock Detector Signal Processing
- Analog Signal Processing With Filter Characteristics in Automotive Applications
Q & A
- What is the primary function of the TPIC8101DWR?
The TPIC8101DWR is designed for the detection of premature detonation in combustion engines, serving as an interface between acoustical sensors or accelerometers and the engine management systems.
- What is the operating voltage range of the TPIC8101DWR?
The operating voltage range is 5 V ± 0.25 V (± 5%).
- What is the maximum quiescent current of the TPIC8101DWR?
The maximum quiescent current (IDDQ) is 7.5 mA.
- What is the typical sampling frequency of the ADC in the TPIC8101DWR?
The typical sampling frequency is 200 kHz.
- What is the resolution of the ADC in the TPIC8101DWR?
The minimum ADC resolution is 10 bits.
- What are the programmable features of the TPIC8101DWR?
The device features programmable gain, band-pass filter center frequency, input frequency prescaler, and integrator time constants.
- What is the operating temperature range of the TPIC8101DWR?
The operating temperature range is –40°C to 125°C.
- How does the TPIC8101DWR handle engine background noise?
The device uses a programmable band-pass filter to eliminate engine background noise and extract the frequency of interest associated with engine knock or ping signals.
- What is the maximum DC input voltage on the sensor terminals?
The maximum DC input voltage on CH1P, CH1N, CH2P, CH2N is 14 V.
- How does the TPIC8101DWR interface with the microprocessor?
The device interfaces with the microprocessor through an SPI bus, allowing for the digital output to be read directly or converted to an analog signal.
