AD9874ABST datasheet(11/40 Pages) AD

11 / 40 page

REV. A

AD9874

–11–

CHANNEL BANDWIDTH – kHz

10.0

7.5

1000

100

9.5

9.0

8.5

8.0

24-BIT

I/Q DATA

16-BIT

I/Q DATA

16-BIT

I/Q DATA

w/ DVGA

ENABLED

TPC 10a. Noise Figure vs. BW (Mini-

mum Attenuation, fCLK = 13 MSPS)

VGA ATTENUATION – dB

11.5

7.0

11.0

10.5

10.0

9.5

9.0

8.5

8.0

7.5

BW = 6.78kHz

(K = 0, M = 15)

BW = 12.04kHz

(K = 0, M = 8)

BW = 27.08kHz

(K = 0, M = 3)

TPC 11a. Noise Figure vs. VGA

Attenuation (fCLK = 13 MSPS)

IFIN – dBm

–45

–130

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–42

–39

–36

–33

–30

–27

–24

LOW BIAS

HIGH BIAS

–5

–30

–10

–15

–20

–25

–40

–35

–45

TPC 12a. IMD vs. IFIN (fCLK = 13 MSPS)

CHANNEL BANDWIDTH – kHz

10.0

7.5

1000

100

9.5

9.0

8.5

8.0

24-BIT

DATA

16-BIT

DATA

16-BIT DATA

w/ DVGA

ENABLED

TPC 10b. Noise Figure vs. BW (Mini-

mum Attenuation, fCLK = 18 MSPS)

VGA ATTENUATION – dB

BW = 15kHz

(K = 0, M = 9)

BW = 50kHz

(K = 0, M = 2)

BW = 75kHz

(K = 0, M = 1)

TPC 11b. Noise Figure vs. VGA

Attenuation (fCLK = 18 MSPS)

IFIN – dBm

–45

–130

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–42

–39

–36

–33

–30

–27

–24

LOW BIAS

HIGH BIAS

–5

–30

–10

–15

–20

–25

–40

–35

–45

TPC 12b. IMD vs. IFIN (fCLK = 18 MSPS)

CHANNEL BANDWIDTH – kHz

10.0

7.5

1000

100

9.5

9.0

8.5

8.0

24-BIT

DATA

16-BIT

DATA

16-BIT DATA

w/ DVGA

ENABLED

TPC 10c. Noise Figure vs. BW (Mini-

mum Attenuation, fCLK = 26 MSPS)

VGA ATTENUATION – dB

BW = 27.08kHz

(K = 1, M = 9)

BW = 90.28kHz

(K = 1, M = 2)

BW = 135.42kHz

(K = 1, M = 1)

TPC 11c. Noise Figure vs. VGA

Attenuation (fCLK = 26 MSPS)

IFIN – dBm

–45

–130

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–42

–39

–36

–33

–30

–27

–24

LOW BIAS

HIGH BIAS

–5

–30

–10

–15

–20

–25

–40

–35

–45

TPC 12c. IMD vs. IFIN (fCLK = 26 MSPS)

(VDDI = VDDF = VDDA = VDDC = VDDL = VDDD = VDDH = VDDx, VDDQ = VDDP = 5.0 V,

fCLK = 18 MSPS, fIF = 109.56 MHz, fLO = 107.4 MHz,

TA = 25 C, LO = –5 dBm, LO and CLK Synthesizer Disabled, 16-Bit Data with AGC and DVGA enabled, unless otherwise noted.)

1Data taken with Toko FSLM series 10

µH inductors.

2High Bias corresponds to LNA_Mixer Setting of 33 in SPI Register 0x01.

3Low Bias corresponds to LNA_Mixer Setting of 12 in SPI Register 0x01.

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