EVAL-CONTROL BRD2Z Analog Devices Inc, EVAL-CONTROL BRD2Z Datasheet - Page 4

• Manufacturer Part Number: EVAL-CONTROL BRD2Z
• Manufacturer: Analog Devices Inc

Specifications of EVAL-CONTROL BRD2Z

• Lead Free Status / Rohs Status: Supplier Unconfirmed

EVAL-AD76XXCBZ
is not limited to 16 bit wide transfers in stand-alone operation.
When either parallel or serial reading mode, the data is available
on this parallel bus. Refer to Figure 3 to obtain the data output
pins on P2.
Configuration Switches
The evaluation board is configurable for the different operating
modes with 16 positions on the configuration select switches,
S16 and S35. A description of each switch setting and jumper
position is listed in Figure 3 and the available test points are
listed in Table 5. Note that the switches in the ON position
define a logic HIGH level (pulled up with 10kΩ,) and that the
switches are active only in stand-alone mode.
For all interface modes, S16 and S35 allows the selection of:
Warp, Normal or Impulse mode conversions (where applicable)
Binary or 2s complement data output
Reading during or after conversion
Resetting the ADC
ADC power-down
Internal Reference and Buffer power-down (where applicable)
In parallel reading mode, s16 allows the selection of:
Byte swapping for 8 bit interfacing (LSByte with MSByte)
18-bit, 16-bit and 8-bit interfacing (for 18-bit converters)
In serial reading mode, the default settings are Master Read
during Conversion Mode using the internal ADC serial clock.
Serial data is available at T3, T4, T5 and T6 for SDOUT, SCLK,
SYNC and RDERROR respectively. Buffered serial data is
output on the three test points TP17, TP18 and TP19 for SCLK,
SYNC, and SDOUT respectively.
For serial reading mode, S16 allows the selection of:
Choice of inverting SCLK and SYNC
Choice of using internal or external (slave mode) SCLK
SCHEMATICS/PCB LAYOUT
The EVAL-AD76XXCBZ is a 4-layer board carefully laid out
and tested to demonstrate the specific high accuracy
performance of the AD76XX-48 device. Figure 2 to Figure 4
show the schematics of the evaluation board. The printed circuit
layouts of the board are given in Figure 5 - Figure 10. Note these
layouts are not to scale.
Top side silk-screen - Figure 5
Top side layer - Figure 6
Ground layer - Figure 7
Shield layer - Figure 8
Bottom side layer - Figure 9
Bottom side silk-screen - Figure 10
SUPPLYING POWER FOR STAND-ALONE USE
Power needs to be supplied through the two power supply
blocks SJ1 and SJ2. Linear supplies are recommended. SJ1 is the
analog supply for the ADC (AVDD), front end op amps and
reference circuitry. SJ2 is the digital supply for the ADC
(DVDD, OVDD) and gate array. The supplies to the device are
Rev. PrA | Page 4 of 30
configurable through the power supply jumpers shown in Table
2. In most applications four supplies are required; ±12V and
+5V for analog, and +5V for digital. On board regulators, where
applicable, are used to reduce the operating voltages to the
correct levels. The analog and digital supplies can be from the
same source however, R27 (typically 20Ω) is required from
AVDD to DVDD. In this configuration, JP9, DVDD selection,
should be left open. Furthermore, the OVDD (ADC digital
output supply) may need to be brought up after the analog +5V
supply. See datasheet for details.
EVALUATION BOARD SETTING FOR BIPOLAR ADC
INPUT CONFIGURATIONS
The AD7610, AD7612, AD7631, AD7634, AD7663, AD7665,
AD7671, AD7951 and AD7952 can use both unipolar and
bipolar ranges. The available options are +/-10V, +/-5V, +/-2.5V,
0 to 10V, 0 to 5V and 0 to 2.5V (depending on the ADC).
For the AD7663, AD7665 and AD7671 the evaluation board is
set for the ±5V bipolar input range since these ADCs input
ranges are hardware pin strapped. Simple modifications to these
evaluation boards can be made to accommodate the different
input ranges by changing the INA-IND inputs with the available
solder pads.
iCMOS ADCs
For the AD7610, AD7612, AD7631 AD7634 and AD7951, the
evaluation board can use all input ranges since the input range
is controlled by software (or S16 DIP switches in stand-alone
mode).
For operating in unipolar mode for any of the bipolar
evaluation boards it is recommended to use the voltage divider
consisting of (V
This allows a transition noise test without any additional
equipment.
HARDWARE SETUP
Proceed to the Software Installation section to install the
software. Note: The EVAL-CED1Z board must not be
connected to the PC’s USB port until the Software is
installed. The 7V DC supply can be connected however to
check the board has power (green LED lit).
Using EVAL-CONTROL BRDxZ Capture Board
Using EVAL-CED1Z Capture Board
• EVAL-AD762xCBZ or EVAL-AD764xCBZ PulSAR ADC
• EVAL-CED1Z
• Enclosed World compatible 7V DC supply
• Enlcosed USB to mini USB cable
• PulSAR ADC evaluation board
• Evaluation Control Board 3 (or Board 2, not in production
• AC Power Supply (AC 14V/1A source - can be purchased
evaluation board
any longer)
from ADI)
CM
* R6/(R6+R7)) and (V
Preliminary Technical Data
CM
* R29/(R29+R60)).