TEA1062N/TEA1062AN

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

9 of 13

www.unisonic.com.tw

QW-R108-011.C

LN

Leq

Vref

Rp

R1

C3

C1

100

μF

4.7

μF

REG

R9

20

Ω

Rp=16.2k

Ω

Leq=C3*R9*Rp

Fig.3 Equivalent impedance circuit

The anti-sidetone network for the UTCTEA1062N/TEA1062AN family shown in Fig.4 attenuates the signl received

from the line by 32 dB before it enters the receiving amplifier. The attenuation is almost constant over the whole

audio frequency range. Fig.5 shows a convertional Wheatstone bridge anti-sidetone circuit that can be used as an

alternative. Both bridge types can be used with either resistive or complex set impedances.

Fig. 4 Equivalent circuit of UTC TEA1062N/TEA1062AN anti-sidetone bridge

Fig. 5 Equivalent circuit of an anti-sidetone network in a wheatstone bridge configuration

150

130

110

90

70

50

30

24

68

10

12

(1)

(2)

(3)

(4)

(mA)

(1) 45°C 1068mW

(2) 55°C 934mW

(3) 65°C 800mW

(4) 75°C 666mW

Tamb

Ptot

Fig.6 UTC TEA1062N/TEA1062AN safe operating area