AD6459ARS datasheet(5/12 Pages) AD

Part #	AD6459ARS

Description	GSM 3 V Receiver IF Subsystem

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AD6459

–5–

REV. 0

RF FREQUENCY – dB

20

6

50

450

100

150

200

250

300

350

400

18

14

12

10

8

16

RIN = 50Ω, IF = 13MHz

RIN = 50Ω, IF = 26MHz

RIN = 1kΩ, IF = 13MHz

RIN = 50Ω, F = 45MHz

RIN = 400Ω, IF = 13MHz

Figure 3. Mixer Noise Figure vs. RF Frequency

RF FREQUENCY – MHz

2000

800

0

50

550

100

150

200

250

300

350

400

450

500

1800

1000

600

200

1400

1200

400

1600

R SHUNT

VGAIN = 2.2V

C SHUNT

VGAIN = 0.2V

C SHUNT

VGAIN = 1.0V

R SHUNT

VGAIN = 0.2V

C SHUNT

VGAIN = 2.2V

5.0

4.8

4.6

4.4

4.2

4.0

3.8

3.6

3.4

3.2

3.0

Figure 4. Mixer Input Impedance vs. RF Frequency,

VPOS = 2.7 V, TA = +25

°C

RF FREQUENCY – MHz

20

–10

50

450

100

150

200

250

300

350

400

15

10

5

0

–5

VGAIN = 0.2V

VGAIN = 1.0V

VGAIN = 2.25V

Figure 5. Mixer Conversion Gain vs. RF Frequency,

TA = +25°C, VPOS = 2.7 V, VREF = 1.2 V, FIF = 26 MHz

RF FREQUENCY – MHz

20

–10

638

10

14

18

22

26

30

34

15

10

5

0

–5

VGAIN = 0.2V

VGAIN = 1.0V

VGAIN = 2.25V

42

46

Figure 6. Mixer Conversion Gain vs. IF Frequency,

TA = +25°C, VPOS = 2.7 V, VREF = 1.2 V, FRF = 250 MHz

TEMPERATURE –

°C

70

30

0

–50

90

–40

–20 –10

0

10

20

30

40

50

60

70 80

60

50

20

10

40

–30

AMP/DEMOD, VPOS = 2.7V

AMP/DEMOD, VPOS = 5.5V

MIXER, VPOS = 2.7V

MIXER, VPOS = 5.5V

Figure 7. Mixer Conversion Gain and IF Amplifier/

Demodulator Gain vs. Temperature, VGAIN = 0.2 V,

VREF = 1.2 V , FIF = 26 MHz, FRF = 250 MHz

GAIN VOLTAGE – Volts

–9

–10

–15

0

2.5

0.5

1

1.5

2

–11

–12

–13

–14

VPOS = 5.5V

TA = +85°C

VPOS = 5.5V

TA = +25°C

VPOS = 2.7V

TA = +25°C

VPOS = 2.7V

TA = –25°C

VPOS = 5.5V

TA = –45°C

Figure 8. Mixer Input 1 dB Compression Point vs.

VGAIN, VREF = 1.2 V, FRF = 250 MHz, FIF = 26 MHz

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