U4254BM-MPG3 datasheet(8/14 Pages) ATMEL

Part #	U4254BM-MPG3

Description	Low-noise AM/FM Antenna Impedance Matching IC

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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8 / 14 page

8

U4254BM-M

4772B–AUDR–11/03

Electrical Characteristics

VS = 8 V, Tamb = 25° C, unless otherwise specified (see Figure 12 on page 9).

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Unit

Supply voltage

14

V

S

7.288.8

V

Supply currents

14

I

S

3.5

4.8

5.6

mA

Reference voltage 1 output (I

12 =0)

12

V

Ref1

5.1

5.4

5.7

V

Reference voltage 2 output (I

5 =0)

5

V

Ref2

2.3

2.6

2.8

V

Temperature dependence of VREF2

5

V

Ref2/∆T-1

mV/K

AM Amplifier

Input resistance

8

R

AMIN

470

k

Ω

Input capacitance

8

C

AMIN

10

pF

Output resistance

10

R

OUT

125

Ω

Voltage gain

8, 10

a

0.85

Output noise voltage (rms value)

S1 switched to 2

B= 6kHz

150 kHz to 300 kHz

500 kHz to 6.5 kHz

10

V

N1

V

N2

-2

-6

dBµV

2nd harmonic

S2 switched to 1

f

AMIN =500 kHz

Output voltage =

110 dBµV

10

-65

dBc

FM Amplifier

Supply current limit

I

AGC, IAGCADJ =0 A

15

I

15

33

35

mA

Input resistance

f = 100 MHz

1

RFMIN

50

Ω

Output resistance

f = 100 MHz

15

RFMOUT

50

Ω

Power gain

f = 100 MHz

1, 15

G

5

dB

Output noise voltage

f = 100 MHz

B = 120 kHz

15

V

N

0dBµV

3rd-order output intercept

f = 100 MHz

15

132

dBµV

AGC

AGC input voltage threshold

f = 100 MHz

S2 switched to 1;

AGC threshold DC

current is 10 µA at

pin 4

15

Vth1

96

dBµV

AGC input voltage threshold

f = 100 MHz,

S2 switched to 2;

AGC threshold DC

current is 10 µA at

pin 4

15

V

th2

106

dBµV

AGC output current

AGC active

IAGC

1.2

mA

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U4254BM-MPG3 Datasheet(PDF) 8 Page - ATMEL Corporation

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