TDA7705 Electrical specifications
Doc ID 15938 Rev 9 17/42
3.4 Electrical characteristics
V
CC
= 4.7 V to 5.25 V; T
amb
= -40 °C to +85 °C; unless otherwise specified.
3.4.1 FM - section
Table 7. FM - section
Symbol Parameter Test condition Min Typ Max Units
FM IMR mixer
R
in
Input resistance - 90 130 170 k
V
noise
Input noise voltage
Mix 1, R
source
= 1.5 k,
noiseless
-2.53.1
nV/Hz
Mix 2, R
source
= 800 ,
noiseless
-22.5
IIP3 3
rd
order intercept point
Mix 1
up to V
in/tone
= 90 dBµV
Mix 2
up to V
in/tone
= 85 dBµV
122
118
125
121
-
dBµV
dBµV
FM AGC
RFAGC-Thr
RFAGC threshold, referred to
mixer input;
RF level
Mix 1, min setting - 87 -
dBµV
Mix 1, max setting - 93 -
Mix 2, min setting - 85 -
Mix 2, max setting - 91 -
Threshold steps - - 2 - dB
Threshold error @ T
amb
= 27 °C -1.5 1.5 dB
Threshold temperature drift - 0.016 - dB/K
IFAGC-Thr
IFAGC threshold, referred to
mixer input; at tuned
frequency
RF level
Mix 1, min setting - 81 -
dBµV
Mix 1, max setting - 85 -
Mix 2, min setting - 77 -
Mix 2, max setting - 81 -
Threshold steps - - 2 - dB
Threshold error @ T
amb
= 27 °C -1.5 1.5 dB
Threshold temperature drift - 0.016 - dB/K
- Pin diode source current @ T
amb
= 27 °C; see note
(1)
12 - - mA
- Pin diode sink current - 3 - 20 µA
-
Pin diode source current in
constant current mode
@ T
amb
= 27 °C; see note
(1)
0.4 - - mA
1. The current is generated by a PTAT (Proportional To Absolute Temperature) source, and has therefore a temperature
dependency described by: I/Io = T/To, with Io being the current at ambient temperature (25 °C) and To the ambient
temperature (25°C) expressed in Kelvin, that is 298 K.
