Datasheet

AD9772A
Rev. C | Page 6 of 40
DYNAMIC SPECIFICATIONS
T
MIN
to T
MAX
, AVDD = 3.3 V, CLKVDD = 3.3 V, DVDD = 3.3 V, PLLVDD = 3.3 V, I
OUTFS
= 20 mA, differential transformer-coupled
output, 50 Ω doubly terminated, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit
DYNAMIC PERFORMANCE
Maximum DAC Output Update Rate (f
DAC
) 400 MSPS
Output Settling Time (t
ST
) (to 0.025%) 11 ns
Output Propagation Delay
1
(t
PD
) 17 ns
Output Rise Time (10% to 90%)
2
0.8 ns
Output Fall Time (10% to 90%) 0.8 ns
Output Noise (I
OUTFS
= 20 mA) 50 pA√Hz
AC LINEARITY—BASEBAND MODE
Spurious-Free Dynamic Range (SFDR) to Nyquist (f
OUT
= 0 dBFS)
f
DATA
= 65 MSPS; f
OUT
= 1.01 MHz 82 dBc
f
DATA
= 65 MSPS; f
OUT
= 10.01 MHz 75 dBc
f
DATA
= 65 MSPS; f
OUT
= 25.01 MHz 73 dBc
f
DATA
= 160 MSPS; f
OUT
= 5.02 MHz 82 dBc
f
DATA
= 160 MSPS; f
OUT
= 20.02 MHz 75 dBc
f
DATA
= 160 MSPS; f
OUT
= 50.02 MHz 65 dBc
Two-Tone Intermodulation (IMD) to Nyquist (f
OUT1
= f
OUT2
= −6 dBFS)
f
DATA
= 65 MSPS; f
OUT1
= 5.01 MHz; f
OUT2
= 6.01 MHz 85 dBc
f
DATA
= 65 MSPS; f
OUT1
= 15.01 MHz; f
OUT2
= 17.51 MHz 75 dBc
f
DATA
= 65 MSPS; f
OUT1
= 24.1 MHz; f
OUT2
= 26.2 MHz 68 dBc
f
DATA
= 160 MSPS; f
OUT1
= 10.02 MHz; f
OUT2
= 12.02 MHz 85 dBc
f
DATA
= 160 MSPS; f
OUT1
= 30.02 MHz; f
OUT2
= 35.02 MHz 70 dBc
f
DATA
= 160 MSPS; f
OUT1
= 48.2 MHz; f
OUT2
= 52.4 MHz 65 dBc
Total Harmonic Distortion (THD)
f
DATA
= 65 MSPS; f
OUT
= 1.0 MHz; 0 dBFS −80 dB
f
DATA
= 78 MSPS; f
OUT
= 10.01 MHz; 0 dBFS −74 dB
Signal-to-Noise Ratio (SNR)
f
DATA
= 65 MSPS; f
OUT
= 16.26 MHz; 0 dBFS 71 dB
f
DATA
= 100 MSPS; f
OUT
= 25.1 MHz; 0 dBFS 71 dB
Adjacent Channel Power Ratio (ACPR)
WCDMA with 4.1 MHz BW, 5 MHz Channel Spacing
IF = 16 MHz, f
DATA
= 65.536 MSPS 78 dBc
IF = 32 MHz, f
DATA
= 131.072 MSPS 68 dBc
Four-Tone Intermodulation
15.6 MHz, 15.8 MHz, 16.2 MHz, and 16.4 MHz at −12 dBFS 88 dBFS
f
DATA
= 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 77 dBFS
f
DATA
= 52 MSPS, f
DAC
= 208 MHz
1
Propagation delay is delay from the CLK+/CLK− input to the DAC update.
2
Measured single-ended into 50 Ω load.