TDA0161_05 STMICROELECTRONICS [STMicroelectronics], TDA0161_05 Datasheet - Page 5

• Manufacturer Part Number: TDA0161_05
• Description: Proximity Detectors
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

If the circuit is used at frequency higher than 3MHz, it is recommended to connect a capacitor of 100pF between pins 7 and 6
TDA0161
3
Figure 2.
I
I
cc
cc
(remote)
(close)
Operating Mode
Between pins 3 and 7, the integrated circuit acts like a negative resistor with a value equal to
that of the external resistor R1 (connected between pins 2 and 4). The oscillation stops when
the tuned circuit loss resistance (Rp) becomes smaller than R1. As a result, I
(pins 1 and 6). The oscillation is sustained when Rp is higher than R1, and I
(pins 1 and 6). Eddy currents induced by coil L1 in a metallic body determine the value of Rp.
Electrical Scheme
CC
CC
(remote) = 1mA
3 Operating Mode
(close) = 10mA
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