Digital Input Data Timing Specifications; Ac Specifications; Changes To Table 3 - Analog Devices AD9776A Manual

AD9776A/AD9778A/AD9779A

DIGITAL INPUT DATA TIMING SPECIFICATIONS

All modes, −40°C to +85°C.
Table 3.
Parameter
Input Data 1
Setup Time
Hold Time
Setup Time
Hold Time
Latency
1× Interpolation
2× Interpolation
4× Interpolation
8× Interpolation
Inverse Sync
2
Power-Up Time
1 Timing vs. temperature and data valid keep out windows are delineated in Table 25.
2 Measured from CSB rising edge on Register 0x00, Bit 4 write from 0 to 1. VREF decoupling capacitor equal to 0.1 μF.

AC SPECIFICATIONS

T to T , AVDD33 = 3.3 V, DVDD33 = 3.3 V, DVDD18 = 1.8 V, CVDD18 = 1.8 V, I
MIN MAX
otherwise noted.
Table 4.
Parameter
SPURIOUS FREE DYNAMIC RANGE (SFDR)
f = 100 MSPS, f
DAC OUT
f = 200 MSPS, f
DAC OUT
f = 400 MSPS, f
DAC OUT
f = 800 MSPS, f
DAC OUT
TWO-TONE INTERMODULATION DISTORTION (IMD)
f = 200 MSPS, f
DAC OUT
f = 400 MSPS, f
DAC OUT
f = 400 MSPS, f
DAC OUT
f = 800 MSPS, f
DAC OUT
NOISE SPECTRAL DENSITY (NSD) EIGHT-TONE, 500 kHz
TONE SPACING
f = 200 MSPS, f
DAC OUT
f = 400 MSPS, f
DAC OUT
f = 800 MSPS, f
DAC OUT
W-CDMA ADJACENT CHANNEL LEAKAGE RATIO (ACLR),
SINGLE CARRIER
f = 491.52 MSPS, f
DAC
f = 491.52 MSPS, f
DAC
W-CDMA SECOND ADJACENT CHANNEL LEAKAGE RATIO
(ACLR), SINGLE CARRIER
f = 491.52 MSPS, f
DAC
f = 491.52 MSPS, f
DAC
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Conditions
Input data to DATACLK
Input data to DATACLK
Input data to REFCLK
Input data to REFCLK
With or without modulation
With or without modulation
With or without modulation
With or without modulation
= 20 MHz
= 50 MHz
= 70 MHz
= 70 MHz
= 50 MHz
= 60 MHz
= 80 MHz
= 100 MHz
= 80 MHz
= 80 MHz
= 80 MHz
= 100 MHz
OUT
= 200 MHz
OUT
= 100 MHz
OUT
= 200 MHz
OUT
Min Typ
3.0
0.0
−0.8
3.7
25
70
146
297
18
260
OUTFs
AD9776A AD9778A
Min Typ Max Min
82
81
80
85
87
80
75
75
−152
−155
−157.5
76
69
77.5
76
Rev. A | Page 6 of 60
Max Unit
ns
ns
ns
ns
DACCLK Cycles
DACCLK Cycles
DACCLK Cycles
DACCLK Cycles
DACCLK Cycles
ms
= 20 mA, maximum sample rate, unless
AD9779A
Typ Max Min Typ Max
82 82
81 82
80 80
85 87
87 91
85 85
81 81
80 81
−155 −158
−159 −160
−160 −161
78 79
73 74
80 81
78 78
Unit
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBm/Hz
dBm/Hz
dBm/Hz
dBc
dBc
dBc
dBc