AD9772AST datasheet(3/30 Pages) AD

3 / 30 page

REV. 0

–3–

AD9772

(TMIN to TMAX, AVDD = +3 V, CLKVDD = +3 V, DVDD = +3 V, PLLVDD = 0 V, IOUTFS = 20 mA,

Differential Transformer Coupled Output, 50

Doubly Terminated, unless otherwise noted)

DYNAMIC SPECIFICATIONS

Parameter

Min

Typ

Max

Units

DYNAMIC PERFORMANCE

Maximum DAC Output Update Rate (fDAC)

400

MSPS

Output Settling Time (tST) (to 0.025%)

Output Propagation Delay1 (tPD)17

Output Rise Time (10% to 90%)2

0.8

Output Fall Time (10% to 90%)2

0.8

Output Noise (IOUTFS = 20 mA)

pA/

√Hz

AC LINEARITY–BASEBAND MODE

Spurious-Free Dynamic Range (SFDR) to Nyquist (fOUT = 0 dBFS)

fDATA = 65 MSPS; fOUT = 1.01 MHz

dBc

fDATA = 65 MSPS; fOUT = 10.01 MHz

dBc

fDATA = 65 MSPS; fOUT = 26.01 MHz

dBc

fDATA = 150 MSPS; fOUT = 2.02 MHz

dBc

fDATA = 150 MSPS; fOUT = 20.02 MHz

dBc

fDATA = 150 MSPS; fOUT = 52.02 MHz

dBc

Two-Tone Intermodulation (IMD) to Nyquist (fOUT1 = fOUT2 = –6 dBFS)

fDATA = 65 MSPS; fOUT1 = 5.01 MHz; fOUT2 = 6.01 MHz

dBc

fDATA = 65 MSPS; fOUT1 = 15.01 MHz; fOUT2 = 17.51 MHz

dBc

fDATA = 65 MSPS; fOUT1 = 24.1 MHz; fOUT2 = 26.2 MHz

dBc

fDATA = 150 MSPS; fOUT1 = 10.02 MHz; fOUT2 = 12.02 MHz

dBc

fDATA = 150 MSPS; fOUT1 = 30.02 MHz; fOUT2 = 35.02 MHz

dBc

fDATA = 150 MSPS; fOUT1 = 48.2 MHz; fOUT2 = 52.4 MHz

dBc

Total Harmonic Distortion (THD)

fDATA = 50 MSPS; fOUT = 1.0 MHz; 0 dBFS

–78

fDATA = 65 MSPS; fOUT = 10.01 MHz; 0 dBFS

–77

Signal-to-Noise Ratio (SNR)

fDATA = 65 MSPS; fOUT = 16.26 MHz; 0 dBFS

fDATA = 100 MSPS; fOUT = 25.1 MHz; 0 dBFS

Adjacent Channel Power Ratio (ACPR)

WCDMA with 4.1 MHz BW, 5 MHz Channel Spacing

IF = 16 MHz, fDATA = 65.536 MSPS

dBc

IF = 32 MHz, fDATA = 131.072 MSPS

dBc

Four-Tone Intermodulation

15.6 MHz, 15.8 MHz, 16.2 MHz and 16.4 MHz at –12 dBFS

dBFS

fDATA = 65 MSPS, Missing Center

AC LINEARITY–IF MODE

Four-Tone Intermodulation at IF = 70 MHz

68.1 MHz, 69.3 MHz, 71.2 MHz and 72.0 MHz at –20 dBFS

dBFS

fDATA = 52 MSPS, fDAC = 208 MHz

NOTES

1Propagation delay is delay from CLK input to DAC update.

2Measured single-ended into 50

Ω load.

Specifications subject to change without notice.

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