Datasheet

Data Sheet AD9958
Rev. B | Page 7 of 44
Parameter Min Typ Max Unit Test Conditions/Comments
POWER SUPPLY
Total Power Dissipation—Both Channels On, Single-
Tone Mode
315 380 mW Dominated by supply variation
Total Power Dissipation—Both Channels On, with
Sweep Accumulator
350 420 mW Dominated by supply variation
Total Power Dissipation—Full Power-Down 13 mW
I
AVDD
—Both Channels On, Single-Tone Mode 90 105 mA
I
AVDD
—Both Channels On, Sweep Accumulator,
REFCLK Multiplier, and 10-Bit Output Scalar
Enabled
95 110 mA
I
DVDD
—Both Channels On, Single-Tone Mode 60 70 mA
I
DVDD
—Both Channels On, Sweep Accumulator,
REFCLK Multiplier, and 10-Bit Output Scalar
Enabled
70 80 mA
I
DVDD_I/O
22 mA I
DVDD
= read
30 mA I
DVDD
= write
I
AVDD
Power-Down Mode 2.5 mA
I
DVDD
Power-Down Mode
2.5
mA
DATA LATENCY (PIPELINE DELAY) SINGLE-TONE MODE
2, 3
Frequency, Phase, and Amplitude Words to DAC
Output with Matched Latency Enabled
29 SYSCLKs
Frequency Word to DAC Output with Matched
Latency Disabled
29
SYSCLKs
Phase Offset Word to DAC Output with Matched
Latency Disabled
25 SYSCLKs
Amplitude Word to DAC Output with Matched
Latency Disabled
17 SYSCLKs
DATA LATENCY (PIPELINE DELAY) MODULATION MODE
3, 4
Frequency Word to DAC Output 34 SYSCLKs
Phase Offset Word to DAC Output
29
SYSCLKs
Amplitude Word to DAC Output 21 SYSCLKs
DATA LATENCY (PIPELINE DELAY) LINEAR SWEEP MODE
3, 4
Frequency Rising/Falling Delta-Tuning Word to DAC
Output
41 SYSCLKs
Phase Offset Rising/Falling Delta-Tuning Word to
DAC Output
37 SYSCLKs
Amplitude Rising/Falling Delta-Tuning Word to DAC
Output
29 SYSCLKs
1
For the VCO frequency range of 160 MHz to 255 MHz, there is no guarantee of operation.
2
Data latency is referenced to I/O_UPDATE.
3
Data latency is fixed.
4
Data latency is referenced to a profile change.