AD9778 Analog Devices, AD9778 Datasheet - Page 7

• Manufacturer Part Number: AD9778
• Description: Dual 14-Bit, 1 GSPS, Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9778

• Resolution (bits): 14bit
• Dac Update Rate: 1GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

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