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參數(shù)資料
| 型號(hào)： | AD9776BSVZRL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 41/56頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 12BIT DUAL 1GSPS 100TQFP |
| 產(chǎn)品培訓(xùn)模塊： | DAC Architectures |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 模擬和數(shù)字 |
| 功率耗散（最大）： | 300mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 100-TQFP-EP（14x14） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 4 電流，單極 |
| 采樣率（每秒）： | 1G |
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AD9776/AD9778/AD9779
Rev. A | Page 46 of 56
EVALUATION BOARD OPERATION
The AD977x evaluation board is designed to optimize the DAC
performance and the speed of the digital interface, yet remains
user friendly. To operate the board, the user needs a power
source, a clock source, and a digital data source. The user also
needs a spectrum analyzer or an oscilloscope to look at the DAC
output. The diagram in Figure 100 illustrates the test setup. A
sine or square wave clock works well as a clock source. The dc
offset on the clock is not a problem, since the clock is ac-coupled
on the evaluation board before the REFCLK inputs. All
necessary connections to the evaluation board are shown in
more detail in Figure 101.
The evaluation board comes with software that allows the user
to program the SPI port. Via the SPI port, the devices can be
programmed into any of its various operating modes. When
first operating the evaluation board, it is useful to start with a
simple configuration, that is, a configuration in which the SPI
port settings are as close as possible to the default settings. The
default software window is shown in Figure 102. The arrows
indicate which settings need to be changed for an easy first time
evaluation. Note that this implies that the PLL is not being used
and that the clock being used is at the speed of the DAC output
sample rate. For a more detailed description of how to use the
PLL, see the PLL Loop Filter Bandwidth section.
DIGITAL
PATTERN
GENERATOR
ADAPTER
CABLES
CLOCK
GENERATOR
AD9779
EVALUATION
BOARD
CLKIN
SPI PORT
DATACLK OUT
CLOCK IN
SPECTRUM
ANALYZER
1.8V POWER SUPPLY
3.3V POWER SUPPLY
05361-097
Figure 100. Typical Test Setup
SPI PORT
AD9779
J1 CLOCK IN
P4 Digital Input Connector
S7 DCLKOUT
AUX33
DVDD18
DVDD33
CVDD18
AVDD33
J2
5V Supply
ANALOG
DEVICES
AD9779/8/6
REV D
S5 OUTPUT 1
S6 OUTPUT 2
AD8349
LOCAL OSC
INPUT
MODULATOR
OUTPUT
+5V
GND
JP4
JP15
JP8
JP14
JP3
JP16
JP2
JP17
05
36
1-
09
8
Figure 101. AD977x Evaluation Board Showing All Connections
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| AD9776-EB | 制造商:Analog Devices 功能描述:AD9776 EVAL BOARD - Bulk |
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