AD9779
Preliminary Technical Data
Rev. PrD | Page 4 of 34
DIGITAL SPECIFICATIONS
(VDD33 = 3.3 V, VDD18 = 1.8 V, MAXIMUM SAMPLE RATE, UNLESS OTHERWISE NOTED)
Parameter Temp
Test
Level
Min
Typ
Max
Unit
Differential peak-to-peak Voltage
800
mV
Common Mode Voltage
400
mV
DAC CLOCK INPUT
(CLK+, CLK-)
Maximum Clock Rate
1
GSPS
Maximum Clock Rate (SCLK)
40
MHz
Maximum Pulse width high
TBD
ns
SERIAL PERIPHERAL
INTERFACE
Maximum pulse width low
TBD
ns
Table 2: Digital Specifications
AC SPECIFICATIONS
(VDD33 = 3.3 V, VDD18 = 1.8 V, MAXIMUM SAMPLE RATE, UNLESS OTHERWISE NOTED)
Parameter Temp
Test
Level
Min
Typ
Max
Unit
Output Settling Time (tst) (to 0.025%)
TBD
ns
Output Rise Time (10% to 90%)
TBD
ns
Output Fall Time (90% to 10%)
TBD
ns
DYNAMIC
PERFORMANCE
Output Noise (IoutFS=20mA)
TBD
pA/rtHz
f
DAC
= 100 MSPS, f
OUT
= 20 MHz
82
dBc
f
DAC
= 200 MSPS, f
OUT
= 50 MHz
82
dBc
f
DAC
= 400 MSPS, f
OUT
= 70 MHz
84
dBc
SPURIOUS FREE
DYNAMIC RANGE
(SFDR)
f
DAC
= 800 MSPS, f
OUT
= 70 MHz
87
dBc
f
DAC
= 200 MSPS, f
OUT
= 50 MHz
91
dBc
f
DAC
= 400 MSPS, f
OUT
= 60 MHz
88
dBc
f
DAC
= 400 MSPS, f
OUT
= 80 MHz
81
dBc
TWO-TONE
INTERMODULATION
DISTORTION (IMD)
f
DAC
= 800 MSPS, f
OUT
= 100 MHz
88
dBc
f
DAC
= 156 MSPS, f
OUT
= 60 MHz
-158
dBm/Hz
f
DAC
= 200 MSPS, f
OUT
= 80 MHz
-157
dBm/Hz
f
DAC
= 312 MSPS, f
OUT
= 100 MHz
-159
dBm/Hz
NOISE SPECTRAL
DENSITY (NSD)
f
DAC
= 400 MSPS, f
OUT
= 100 MHz
-159
dBm/Hz
f
DAC
= 245.76 MSPS, f
OUT
= 20 MHz
80
dBc
f
DAC
= 491.52 MSPS, f
OUT
= 100 MHz
79
dBc
WCDMA ADJACENT
CHANNEL LEAKAGE
RATIO (ACLR), SINGLE
CARRIER
f
DAC
= 491.52 MSPS, f
OUT
= 200 MHz
74
dBc
f
DAC
= 245.76 MSPS, f
OUT
= 60 MHz
78
dBc
f
DAC
= 491.52 MSPS, f
OUT
= 100 MHz
80
dBc
WCDMA SECOND
ADJACENT CHANNEL
LEAKAGE RATIO
(ACLR), SINGLE
CARRIER
f
DAC
= 491.52 MSPS, f
OUT
= 200 MHz
76
dBc
Table 3: AC Specifications
