STEVAL-IFS006V1 STMicroelectronics, STEVAL-IFS006V1 Datasheet - Page 9

• Manufacturer Part Number: STEVAL-IFS006V1
• Description: BOARD EVAL 8BIT MICRO + TDE1708
• Manufacturer: STMicroelectronics

Specifications of STEVAL-IFS006V1

• Design Resources: STEVAL-IFS006V1 Bill of Material
• Sensor Type: Proximity
• Interface: I²C
• Voltage - Supply: 6 V ~ 48 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ST7FLITEUS5, TDE1708
• Processor To Be Evaluated: ST7LITEUS5
• Data Bus Width: 8 bit
• Operating Supply Voltage: 6 V to 48 V
• Silicon Manufacturer: ST Micro
• Silicon Core Number: TDE1708DFT
• Kit Application Type: Sensing - Touch / Proximity
• Application Sub Type: Proximity Switch
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6403; STEVAL-IFS006V1

TDE1708DFT
3.1
Figure 5.
Adjustable input hysteresis circuit
The TDE1708DFT is a device realized in bipolar technology and therefore it has the usual
problems of temperature compensation that such technology involves; despite all it
maintains an input dynamics within 1 V over industrial temperatures range.
In all input voltage range it will guarantee a high impedance of 1 MΩ determining an input
current about 2 µA.
Exploiting this input high impedance is possible connects a sensor directly on it and bypass
the obstacle of active signal conditioning circuit using a voltage firm point as ground of
sensor, the delay capacitor, connected on the pin 3, as low pass filter and capacitor on Vreg
pin to minimize the noise on it and protect for errors the low-voltage internal circuits,
according AN495.
In
connected to the body and a sensor with independent ground.
In order to ground the body of the sensor, J1 has to be shorted, while J2 opened and
connect the sensor on M3; in case of independent ground J1 must be opened, J2 shorted
and the sensor connected on M4.
DL1 indicate commutation status of the device output and C3 realize a simple output filtering
in case is used an inductive load. With C2 about 10 nF we obtain a good filtering and
immunity from input voltage noise. C4 is 4,7nF according AN495.
R2 is an optional resistor plugged only when the sensor needs to adapt its impedance with
the input impedance of device.
Application circuit for adjustable input hysteresis
Figure 5.
the input external network is optimized for accepting both a sensor with ground
TDE1708DFT
Application information
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