Datasheet

AD9776/AD9778/AD9779
Rev. A | Page 7 of 56
DIGITAL INPUT DATA TIMING SPECIFICATIONS
Table 3. AD9776, AD9778, and AD9779 Digital Input Data Timing Specifications
Parameter Min Typ Max Unit
INPUT DATA (ALL MODES, −40°C to +85°C)
1
Set-Up Time, Input Data to DATACLK +2.5 ns
Hold Time, Input Data to DATACLK −0.4 ns
Set-Up Time, Input Data to REFCLK −0.8 ns
Hold Time, Input Data to REFCLK +2.9 ns
1
Timing vs. temperature and data valid keep out windows are delineated in Table 19.
AC SPECIFICATIONS
T
MIN
to T
MAX
, AVDD33 = 3.3 V, DVDD33 = 3.3 V, DVDD18 = 1.8 V, CVDD18 = 1.8 V, = 20 mA, maximum sample rate, unless
otherwise noted.
S
OUTF
I
Table 4. AD9776, AD9778, and AD9779 AC Specifications
AD9776 AD9778 AD9779
Parameter Min Typ Max Min Typ Max Min Typ Max Unit
SPURIOUS FREE DYNAMIC RANGE (SFDR)
f
DAC
= 100 MSPS, f
OUT
= 20 MHz 82 82 82 dBc
f
DAC
= 200 MSPS, f
OUT
= 50 MHz 81 81 82 dBc
f
DAC
= 400 MSPS, f
OUT
= 70 MHz 80 80 80 dBc
f
DAC
= 800 MSPS, f
OUT
= 70 MHz 85 85 87 dBc
TWO-TONE INTERMODULATION DISTORTION
(IMD)
f
DAC
= 200 MSPS, f
OUT
= 50 MHz 87 87 91 dBc
f
DAC
= 400 MSPS, f
OUT
= 60 MHz 80 85 85 dBc
f
DAC
= 400 MSPS, f
OUT
= 80 MHz 75 81 81 dBc
f
DAC
= 800 MSPS, f
OUT
= 100 MHz 75 80 81 dBc
NOISE SPECTRAL DENSITY (NSD) EIGHT-TONE,
500 kHz TONE SPACING
f
DAC
= 200 MSPS, f
OUT
= 80 MHz −152 −155 −158 dBm/Hz
f
DAC
= 400 MSPS, f
OUT
= 80 MHz −155 −159 −160 dBm/Hz
f
DAC
= 800 MSPS, f
OUT
= 80 MHz −157.5 −160 −161 dBm/Hz
WCDMA ADJACENT CHANNEL LEAKAGE
RATIO (ACLR), SINGLE CARRIER
f
DAC
= 491.52 MSPS, f
OUT
= 100 MHz 76 78 79 dBc
f
DAC
= 491.52 MSPS, f
OUT
= 200 MHz 69 73 74 dBc
WCDMA SECOND ADJACENT CHANNEL
LEAKAGE RATIO (ACLR), SINGLE CARRIER
f
DAC
= 491.52 MSPS, f
OUT
= 100 MHz 77.5 80 81 dBc
f
DAC
= 491.52 MSPS, f
OUT
= 200 MHz 76 78 78 dBc