TDA7705

Electrical specifications

Doc ID 15938 Rev 9

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3.4

Electrical characteristics

3.4.1

FM - section

Table 7.

FM - section

Symbol

Parameter

Test condition

Min

Typ

Max

Units

FM IMR mixer

Input resistance

-

90

130

170

k



Input noise voltage

noiseless

-2.5

3.1

nV/

Hz

noiseless

-2

2.5

IIP3

Mix 1

Mix 2

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

-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

-1.5

1.5

dB

Threshold temperature drift

-

0.016

-

dB/K

-

Pin diode source current

(1)

12

-

-

mA

-

Pin diode sink current

-

3

-

20

µA

-

Pin diode source current in

constant current mode

(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.