AD9642-170EBZ Analog Devices, AD9642-170EBZ Datasheet - Page 3

• Manufacturer Part Number: AD9642-170EBZ
• Description: Data Conversion IC Development Tools 14 Bit 170 Msps 1.8V ADC
• Manufacturer: Analog Devices
• Type: ADCr
• Series: AD9642r

Specifications of AD9642-170EBZ

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: AD9642-170
• Interface Type: SPI, USB
• Operating Supply Voltage: 6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Current: 2 A
• Factory Pack Quantity: 1
• For Use With: HSC-ADC-EVALCZ

Evaluation Board User Guide
EVALUATION BOARD HARDWARE
The AD9642, AD9634, and
all of the support circuitry required to operate these parts in
their various modes and configurations. Figure 2 shows the
typical bench characterization setup used to evaluate the ac
performance of the AD9642, AD9634, or AD6672. It is critical
that the signal sources used for the analog input and the clock
have very low phase noise (<1 ps rms jitter) to realize the opti-
mum performance of the signal chain. Proper filtering of the
analog input signal to remove harmonics and lower the inte-
grated or broadband noise at the input is necessary to achieve
the specified noise performance.
See the Evaluation Board Software Quick Start Procedures section
to get started, and see Figure 19 to Figure 30 for the complete
schematics and layout diagrams. These diagrams demonstrate
the routing and grounding techniques that should be applied at
the system level when designing application boards using these
converters.
POWER SUPPLIES
This evaluation board comes with a wall-mountable switching
power supply that provides a 6 V, 2.5 A maximum output. Connect
the supply to a rated 100 V ac to 240 V ac wall outlet at 47 Hz
to 63 Hz. The output from the supply is provided through a
2.1 mm inner diameter jack that connects to the printed circuit
board (PCB) at P201. The 6 V supply is fused and conditioned
on the PCB before connecting to the low dropout linear regulators
(default configuration) that supply the proper bias to each of the
various sections on the board.
100V TO 240V AC
WALL OUTLET
47Hz TO 63Hz
SYNTHESIZER
SIGNAL
ANALOG
FILTER
AD6672
SWITCHING
POWER
SUPPLY
SWITCHING
POWER
SUPPLY
evaluation board provides
6V DC
2.5A MAX
Figure 2. Evaluation Board Connection
OPTIONAL CLOCK SOURCE
Rev. 0 | Page 3 of 28
SYNTHESIZER
SIGNAL
The evaluation board can be powered in a nondefault condition
using external bench power supplies. To do this, remove the
jumpers on the P104, P107, P108, and P105 header pins to
disconnect the outputs from the on-board LDOs. This enables the
user to bias each section of the board individually. Use P202
and P203 to connect a different supply for each section. A 1.8 V
supply is needed with a 1 A current capability for DUT_AVDD and
DRVDD; however, it is recommended that separate supplies be
used for both analog and digital domains. An additional supply
is also required to supply 1.8 V for digital support circuitry on
the board, DVDD. This should also have a 1 A current capability
and can be combined with DRVDD with little or no degradation
in performance. To operate the evaluation board using the SPI
and alternate clock options, a separate 3.3 V analog supply is
needed in addition to the other supplies. This 3.3 V supply, or
3P3V_ANALOG, should have a 1 A current capability. This
3.3 V supply is also used to support the optional input path
amplifier (ADL5201) on Channel A and Channel B.
INPUT SIGNALS
When connecting the clock and analog source, use clean signal
generators with low phase noise, such as the Rohde & Schwarz
SMA or HP 8644B signal generators or an equivalent. Use a 1 m
shielded, RG-58, 50 Ω coaxial cable for connecting to the evalua-
tion board. Enter the desired frequency and amplitude (see the
Specifications section in the data sheet of the respective part).
6V DC
2.5A MAX
OR VISUAL ANALOG
USER SOFTWARE
RUNNING ADC
ANALYZER
PC
UG-386