TDA4320X Datasheet, PDF (14/16 Pages) Siemens Semiconductor Group – FM-IF with Counter Output, Field Strength Indicator, Noise Detector and MUTE Setting

Diagram D3
TDA 4320X
Test points to determine V_F temperature drift:
V_F-temperature drift: it is determined within – 40 to + 85 °C.
Slope: m = (V_F(M2) – V_F(M1))/40 dB (at 25 °C).
The tolerance range of the V_F-temperature is determined by two parallel lines:
V_{F max} = V_F(M1) + m(M + 60 dB + 3 dB)
V_{F min} = V_F(M1) + m(M + 60 dB – 3 dB)
The V_F values for temperatures between – 40 to + 85 °C within the V_F dynamic range
(M_{VF min} ≤ V_F ≤ M_{VF max}) must be inside the predetermined tolerance field:
V_{F min} ≤ V_F(M) ≤ V_{F max}
Semiconductor Group
48
04.96