Electrical specifications

TDA7705

18/42

Doc ID 15938 Rev 9

3.4.2

AM - section

Table 8.

AM - section

Symbol

Parameter

Test condition

Min

Typ

Max

Units

AM IMR Mixer

Input resistance

-

20

30

45

k



Max. output voltage

without clipping

-

126

-

dBµV

Input noise voltage

noiseless

-8.5

12

nV/

Hz

noiseless

-8.5

12

IIP3

Mix 1,2

126

129

-

dBµV

IIP2

Mix1 1,2

-

158

-

dBµV

LO hsupp

LO harmonic suppression

N=2,3,4,5,6

-

100

-

dB

N=7,9

-

85

-

AM LNA

Gain

Voltage gain

21

25

28

dB

Min Gain (AGC controlled)

-

12

-

Input resistance

-

-

1000

k



Input capacitance

-

-

20

pF

Input noise voltage

-

-

1.0

1.4

nV/

Hz

IIP3

@ maximum LNA gain

-

125

-

dBµV

IIP2

@ maximum LNA gain

-

143

-

dBµV

AM PIN diode

IIP2

Full attenuation,

-

140

-

dBµV

Minimum resistance

-

-

50

80



Input capacitance

High ohmic

-

12

-

pF

AM AGC

AGC-Thr

Referred to mixer input

RF level

Mix 1,2 min setting

-

87

-

dBµV

Mix 1,2 max setting

-

93

-

Thr-steps

Threshold steps

-

-

1

-

dB

Threshold error

-2.5

-

2.5

Threshold temperature drift

-

-3

-

3

-

Pin diode source current

(1)

2-

10

mA

-

Pin diode sink current

-

15

35

50

µA

-

Pin diode source current in

constant current mode

(1)

1.5

2.5

3.5

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.