Philips TDA1576T FM/IF amplier/demodulator circuit TDA1576T

1998 Nov 18 7
Philips Semiconductors Product specification
FM/IF amplifier/demodulator circuit TDA1576T
Field strength output; see Fig.4
V15 output voltage ViIF = 0 0 0.1 0.25 V
ViIF = 1 mV (RMS) 1.1 1.5 1.9 V
ViIF = 250 mV (RMS) 3.2 3.6 4.1 V
S control steepness −0.85 −V/dec
R15 output resistance −150 200 Ω
dependence on temperature −0.3 −%/K
I15 standby operational cut-off current V5≥3V; V15=0to5V −−10 µA
Zero level adjustment
V16 internal bias voltage −260 −mV
R16 input resistance −19 −kΩ
S control steepness ViIF = 100 mV; 0.87 1.0 1.2 V/V
Detuning detector
I12 input bias current −20 100 nA
Z12 input impedance ; see Fig.5 630−MΩ
output voltage ratio for
∆ϕ =ϕ(V3-7)−ϕ(V4-6)−90°V1=V
2= 7.5 V;
R13-14 =10kΩ; pins 9
and 12 short-circuit;
see Fig.6
∆ϕ = 9.2° (43 kHz); Q = 20 V9,12 = 334 mV 0.45 0.5 0.55 V/V
∆ϕ = 3.5° (16 kHz); Q = 20 V9,12 = 138 mV 0.75 0.8 0.85 V/V
∆ϕ =14° (65 kHz); Q = 20 V9,12 = 501 mV 0.335 0.345 0.355 V/V
I13 maximum output current V13 = 6 V; see Fig.7 0.4 0.5 0.6 mA
cut-off current V13 = 2.5 V; V9, 12 =0 −−−100 nA
Internal audio attenuation; see Fig.8
output voltage ratio α= attenuation factor
α= 1 dB 0.11 0.12 0.13 V/V
α= 7.2 dB 0.095 0.1 0.105 V/V
α≥40 dB −0.06 −V/V
I13 input current V13 ≤0.1 V −−−225 nA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V∆T∆
------- ViIF
V15 ∆
T∆V15
×
----------------------
=
AV15
∆
V16
∆
------------
=
Z12 5V
I
12
∆
----------
=
V13
V14
---------
V13
V14
---------