21

ATR4255

4837A–AUDR–10/04

3FM RF-AGC

3.1

Saturation voltage

No input signal

5

8.3

V

A

3.2

Saturation voltage

No input signal

5

V

V

B

3.3

Threshold level

In-band signal

30

110

dBµV

D

3.4

Maximum threshold

level

Out-of-band signal

(110 MHz),

bit 64, 65 = 0

1

100

102

104

dBµV

A

4

AM RF-AGC, AM Mode (Bit 92 = 0, Bit 93 = 1)

4.1

Saturation voltage

No input signal

7

8.3

V

A

4.2

Saturation voltage

No input signal

7

V

V

B

4.3

Output voltage for

minimum gain

Bit 92 = 1

7

6.5

6.8

7.1

V

A

4.4

Output voltage for

minimum gain

Bit 92 = 1

7

V

V

B

4.5

Maximum control

voltage

V(pin 8) = 3 V

6

6.5

7.0

7.5

V

A

4.6

Maximum control

voltage

V(pin 8) = 3 V

6

V

V

B

4.7

Minimum control

voltage

V(pin 8) = 6 V

6

0.2

0.7

V

A

4.8

Minimum threshold

level

Bits 62, 63 = 0

41

97

99

101

dBµV

A

5

AM Mixer, AM Mode (Bit 92 = 0, Bit 93 = 1)

5.1

Supply current

Sum of current in

pins 43, 44

43, 44

14

16

20

mA

A

5.2

Conversion

conductance

3, 41,

43, 44

4.1

mS

D

5.3

3

intercept point

Pin 3 AC-grounded

41

132

dBµV

C

5.4

Noise figure (SSB)

Generator resistance

2.5 k

Ω (pin 41)

43, 44

NF

AMmix

14

dB

C

5.5

Input bias DC voltage

3, 41

2.4

2.6

2.9

V

A

5.6

Input resistance

Single-ended, pin 39

AC-grounded

3, 41

2.5

k

Ω

D

5.7

Input capacitance

3, 41

3

pF

D

5.8

Maximum output

voltage

Differential

43, 44

12

Vpp

D

5.9

Output resistance

43, 44

100

k

Ω

D

6

FM Mixer (FM Mode (Bit 92 = 1, Bit 93 = 0)

6.1

Supply current

Sum of current in

pins 43, 44

43, 44

15

17.5

20

mA

A

6.2

Conversion

conductance

1, 2,

43, 44

7mS

D

Electrical Characteristics (Continued)

Test conditions (unless otherwise specified): V

No.

Parameters

Test Conditions

Pin

Symbol

Min.

Typ.

Max.

Unit

Type*

*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter