U4254BM-AFPG3 datasheet(6/12 Pages) TEMIC

Part #	U4254BM-AFPG3

Description	Low-Noise AM/FM Antenna Impedance Matching IC

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Manufacturer	TEMIC [TEMIC Semiconductors]

Direct Link	http://www.temic.de

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U4254BM

TELEFUNKEN Semiconductors

Rev. A1, 01-Jul-97

6 (12)

Electrical Characteristics

See test circuit

VS = 8 V, Tamb = 25°C, unless otherwise specified

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

Supply voltage

Pin 14

Vs

7.2

8

8.8

V

Supply currents

Pin 14

Is

4

mA

Reference voltage 1 output

(I12 = 0)

Pin 12

VRef1

5.5

V

Reference voltage 2 output

(I5 = 0)

Pin 5

VRef2

2.6

V

Temperature dependence of

VREF2

Pin 5

VRef2/

DT

–1

mV/K

AM amplifier

Input resistance

Pin 8

RAMIN

470

k

W

Input capacitance

Pin 8

CAMIN

10

pF

Output resistance

Pin 10

ROUT

125

W

Voltage gain

Pin 10 / Pin 8

a

0.85

Output noise voltage

(rms value)

Pin 10

S1 switched to 2; B = 6 kHz

150 kHz to 300 kHz

500 kHz to 6.5 kHz

VN1

VN2

–2

–6

dB

µV

dB

µV

2nd harmonic

Pin 10

S2 switched to 1

fAMIN = 500 kHz,

Output voltage = 110 dB

µV

–65

dBc

FM amplifier

Supply current limit

IAGC, IAGCADJ = 0 A, Pin 15

I15

33

35

mA

Input resistance

f = 100 MHz

Pin 1

RFMIN

50

W

Output resistance

f = 100 MHz

Pin 15

RFMOUT

50

W

Power gain

f = 100 MHz Pin 15/ Pin 1

G

5

dB

Output noise voltage

Pin 15

f = 100 MHz, B = 120 kHz

VN

0

dB

µV

3rd order output intercept

f = 100 MHz

Pin 15

132

dB

µV

AGC

AGC input voltage threshold

f = 100 MHz

Pin 15

S2 switched to 1;

AGC threshold DC current is

10

µA at Pin 4

Vth1

96

dB

µV

AGC input voltage threshold

f = 100 MHz

Pin 15

S2 switched to 2;

AGC threshold DC current is

10

µA at Pin 4

Vth2

106

dB

µV

AGC output current

AGC active

IAGC

1.2

mA

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U4254BM-AFPG3 Datasheet(PDF) 6 Page - TEMIC Semiconductors

U4254BM-AFPG3 Datasheet(HTML) 6 Page - TEMIC Semiconductors

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