AD9988 datasheet(16/40 Pages) AD

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Data Sheet

AD9988

SPECIFICATIONS

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Rev. 0 | 16 of 40

Table 16.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

SINGLE SIDEBAND PHASE NOISE OFFSET (PLL ENABLED)

Loop filter component values include

C1 = 22 nF, R1 = 226 Ω, C2 = 2.2 nF,

C3 = 33 nF, and phase detector frequency (PFD) =

500 MHz

fOUT = 1.8 GHz, fDAC = 12 GSPS, fCLKIN = 0.5 GHz

1 kHz

−106

dBc/Hz

10 kHz

−113

dBc/Hz

100 kHz

−120

dBc/Hz

600 kHz

−127

dBc/Hz

1.2 MHz

−134

dBc/Hz

1.8 MHz

−138

dBc/Hz

6 MHz

−150

dBc/Hz

ADC AC SPECIFICATIONS

Nominal supplies with TA = 25°C. Input amplitude (AIN) = −1 dBFS, full bandwidth (no decimation) mode. For the minimum and maximum

values, TJ = −40°C to +120°C. Specifications represent average of four ADC channels with DACs powered on. See the AN-835 Application

Note, Understanding High Speed ADC Testing and Evaluation, for definitions and for details on how these tests were completed.

Table 17.

3 GSPS

4 GSPS

Parameter

Min

Typ

Max

Min

Typ

Max

Unit

NOISE DENSITY1

−150.3

−151.5

dBFS/Hz

NOISE FIGURE2

26.8

CODE ERROR RATE (CER)

<1 × 10−30

1 × 10−20

Errors

SIGNAL-TO-NOISE RATIO (SNR)

fIN = 450 MHz

57.8

57.9

dBFS

fIN = 900 MHz

57.7

57.5

dBFS

fIN = 1800 MHz

56.9

56.0

dBFS

fIN = 2700 MHz

55.9

52.4

54.5

dBFS

fIN = 3600 MHz

55.1

52.9

dBFS

fIN = 4500 MHz

53.9

51.4

dBFS

fIN = 5400 MHz

53.2

50.5

dBFS

fIN = 6300 MHz

52.3

49.3

dBFS

fIN = 7200 MHz

51.3

48.5

dBFS

SIGNAL-TO-NOISE-AND-DISTORTION (SINAD)

fIN = 450 MHz

57.5

57.7

dBFS

fIN = 900 MHz

57.2

57.3

dBFS

fIN = 1800 MHz

56.1

55.8

dBFS

fIN = 2700 MHz

54.5

51.0

54.2

dBFS

fIN = 3600 MHz

53.2

52.3

dBFS

fIN = 4500 MHz

48.4

50.1

dBFS

fIN = 5400 MHz

47.8

48.6

dBFS

fIN = 6300 MHz

46.1

45.5

dBFS

fIN = 7200 MHz

44.8

44.3

dBFS

SECOND-ORDER HARMONIC DISTORTION (HD2)

fIN = 450 MHz

−73

−86

dBFS

fIN = 900 MHz

−76

−78

dBFS

fIN = 1800 MHz

−71

−78

dBFS

fIN = 2700 MHz

−65

−67

−53

dBFS

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