AD9913/PCBZ Analog Devices Inc, AD9913/PCBZ Datasheet - Page 21

• Manufacturer Part Number: AD9913/PCBZ
• Description: Eval Board
• Manufacturer: Analog Devices Inc
• Series: AgileRF™r

Specifications of AD9913/PCBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Direct Digital Synthesizer
• Kit Application Type: Clock & Timing
• Silicon Core Number: AD9913
• Kit Contents: Board
• Tool / Board Applications: D/A Converter
• Main Purpose: Timing, Direct Digital Synthesis (DDS)
• Embedded: No
• Utilized Ic / Part: AD9913
• Primary Attributes: 10-Bit DAC, 32-Bit Tuning Word Width
• Secondary Attributes: 250MHz, Graphical User Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

POWER-DOWN FEATURES
The AD9913 supports an externally controlled power-down
feature as well as software programmable power-down bits
consistent with other Analog Devices, Inc. DDS products.
The external PWR_DWN_CTL pin determines the power-
down scheme. A low on this pin allows the user to power down
DAC, PLL, input clock circuitry, and the digital section of the
chip individually via the unique control bits, CFR1 [6:4]. In this
mode, CFR1 [7] is inactive.
When the PWR_DWN_CTL is set, CFR1 [6:4] lose their
meaning. At the same time, the AD9913 provides two different
power-down modes based on the value of CFR1 [7]: a fast
recovery power-down mode in which only the digital logic and
the DAC digital logic are powered down, and a full power-down
mode in which all functions are powered down. A significant
amount of time is required to recover from power-down mode.
Table 11 indicates the logic level for each power-down bit that
drives out of the AD9913 core logic to the analog section and
the digital clock generation section of the chip for the external
power-down operation.
Rev. A | Page 21 of 32
Table 8. Power-Down Controls
Control
PWR_DWN_CTL = 0
CFR1 [7] = don’t
care
PWRDWNCTL = 1
CFR1 [7] = 0
PWRDWNCTL = 1
CFR1 [7] = 1
Mode Active
Software
Control
External
Control,
Fast recovery
power-down
mode
External
Control,
Full power-
down mode
Description
Digital power-down = CFR1 [6]
DAC power-down = CFR1 [5]
Input clock power-down =
CFR1 [4]
N/A
N/A
AD9913