TDA0161DP datasheet(5/12 Pages) STMICROELECTRONICS

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TDA0161DP 数据表(PDF) 5 Page - STMicroelectronics

部件名	TDA0161DP

功能描述	Proximity Detectors

PDF	12 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

5 / 12 page

TDA0161

3 Operating Mode

5/12

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, ICC(close) = 10mA

(pins 1 and 6). The oscillation is sustained when Rp is higher than R1, and ICC(remote) = 1mA

(pins 1 and 6). Eddy currents induced by coil L1 in a metallic body determine the value of Rp.

Figure 2.

Electrical Scheme

Icc(close)

Icc(remote)

If the circuit is used at frequency higher than 3MHz, it is recommended to connect a capacitor of 100pF between pins 7 and 6

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