May 1984 6
Philips Semiconductors Product specification
AM receiver circuit TDA1072A
Oscillator
Frequency range fosc 0,6 −60 MHz
Oscillator amplitude (pins 11 to 12) V11-12 −130 150 mV
External load impedance R12-11(ext) 0,5 −200 kΩ
External load impedance for no oscillation R12-11(ext) −−60 Ω
Ripple rejection at VP(rms) = 100 mV;
fP= 100 Hz
(RR = 20 log [V13-16/V11-16]) RR −55 −dB
Source voltage for switching diodes (6 ×VBE)V
11-16 −4,2 −V
D.C. output current (for switching diodes) −I11 0−20 mA
Change of output voltage at
∆I11 = 20 mA (switch to maximum load) ∆V11-16 −0,5 −V
Buffered oscillator output
D.C. output voltage V10-16 −0,7 −V
Output signal amplitude V10-16(p-p) −320 −mV
Output impedance R10 −170 −Ω
Output current −I10(peak) −−3mA
I.F., a.g.c. and a.f. stages
D.C. input voltage V3-16, V4-16 −2,0 −V
I.F. input impedance R3-4 2,4 3 3,9 kΩ
C3-4 −7−pF
I.F. input voltage for
THD = 3% at m = 80% V3-4 −90 −mV
Voltage gain before start of a.g.c. V3-4/V6-16 −68 −dB
A.G.C. range of i.f. stages: change of
V3-4 for 1 dB change of Vo(af);
V3-4(ref) = 75 mV ∆V3-4 −55 −dB
A.F. output voltage at V3-4(if) = 50 µVV
o(af) −130 −mV
A.F. output voltage at V3-4(if) = 1 mV Vo(af) −310 −mV
A.F. output impedance (pin 6) Zo−3,5 −kΩ
Indicator driver
Output voltage at Vi= 0 mV;
RL(9) = 2,7 kΩV9-16 −20 150 mV
Output voltage at Vi= 500 mV;
RL(9) = 2,7 kΩV9-16 2,5 2,8 3,1 V
Load resistance RL(9) 1,5 −−kΩ
PARAMETER SYMBOL MIN. TYP. MAX. UNIT