Digital Specifications; Changes To Table 2 - Analog Devices AD9776A Manual

DIGITAL 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. LVDS driver and receiver are compliant to the IEEE-1596 reduced range link, unless otherwise noted.
Table 2.
Parameter
CMOS INPUT LOGIC LEVEL
Input V Logic High
IN
Input V Logic Low
IN
Maximum Input Data Rate at Interpolation
1×
2×
4×
8×
CMOS OUTPUT LOGIC LEVEL (DATACLK, PIN 37)
Output V Logic High
OUT
Output V Logic Low
OUT
DATACLK Output Duty Cycle
LVDS RECEIVER INPUTS (SYNC_I+, SYNC_I−)
Input Voltage Range, V
Input Differential Threshold, V
Input Differential Hysteresis, V
Receiver Differential Input Impedance, R
LVDS Input Rate
Setup Time, SYNC_I to REFCLK
Hold Time, SYNC_I to REFCLK
LVDS DRIVER OUTPUTS (SYNC_O+, SYNC_O−)
Output Voltage High, V
Output Voltage Low, V
Output Differential Voltage, |V
Output Offset Voltage, V
Output Impedance, R
DAC CLOCK INPUT (REFCLK+, REFCLK−)
Differential Peak-to-Peak Voltage
Common-Mode Voltage
Maximum Clock Rate
SERIAL PERIPHERAL INTERFACE
Maximum Clock Rate (SCLK)
Minimum Pulse Width High
Minimum Pulse Width Low
Setup Time, SDI to SCLK
Hold Time, SDI to SCLK
Data Valid, SDO to SCLK
1 Specification is at a DATACLK frequency of 100 MHz into a 1 kΩ load, maximum drive capability of 8 mA. At higher speeds or greater loads, best practice suggests
using an external buffer for this signal.
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Conditions
DVDD18, CVDD18 = 1.8 V ± 5%
DVDD18, CVDD18 = 1.9 V ± 5%
DVDD18, CVDD18 = 2.0 V ± 2%
1
At 250 MHz, into 5 pF load
SYNC_I+ = V
or V
IA IB
IDTH
− V
IDTHH IDTHL
IN
Additional limits on f
Register 5, Bits<3:1> in Table 14
SYNC_O+ = V
or V
OA OB
or V
OA OB
|
OD
OS
Single-ended
O
DVDD18, CVDD18 = 1.8 V ± 5%
DVDD18, CVDD18 = 1.9 V ± 5%
DVDD18, CVDD18 = 2.0 V ± 2%
OUTFs
, SYNC_I− = V
IA IB
apply; see description of
SYNC_I
, SYNC_O− = V , 100 Ω termination
OA OB
Rev. A | Page 5 of 60
AD9776A/AD9778A/AD9779A
= 20 mA, maximum sample rate, unless
Min Typ
2.0
300
250
200
112.5
125
137.5
2.4
40 50
825
−100
20
80
0.4
0.55
1025
150 200
1150
80 100
400 800
300 400
900
1000
1100
40
1.6
0.0
2.0
Max Unit
V
0.8 V
MSPS
MSPS
MSPS
MSPS
MSPS
MSPS
V
0.4 V
60 %
1575 mV
+100 mV
mV
120 Ω
250 MSPS
ns
ns
1375 mV
mV
250 mV
1250 mV
120 Ω
2000 mV
500 mV
MSPS
MSPS
MSPS
MHz
12.5 ns
12.5 ns
ns
ns
ns