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參數(shù)資料
| 型號(hào)： | AD9433BSVZ-125 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT 125MSPS 52-TQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 125M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 1.43W |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 52-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 52-TQFP-EP（10x10） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 2 個(gè)單端，單極；2 個(gè)差分，單極 |
AD9433
Rev. A | Page 19 of 20
A multilayer board is recommended to achieve best results. It is
highly recommended that high quality, ceramic chip capacitors be
used to decouple each supply pin to ground directly at the device.
The pinout of the AD9433 facilitates ease of use in the imple-
mentation of high frequency, high resolution design practices.
All of the digital outputs and their supply and ground pin
connections are segregated on one side of the package, with
the inputs on the opposite side for isolation purposes.
Care should be taken when routing the digital output traces.
To prevent coupling through the digital outputs into the analog
portion of the AD9433 (VCC, AIN, and VREF), minimal capacitive
loading should be placed on these outputs.
It is recommended that a fanout of only one gate be used for all
AD9433 digital outputs.
The layout of the encode circuit is equally critical and should be
treated as an analog input. Any noise received on this circuitry
results in corruption in the digitization process and lower over-
all performance. The encode clock must be isolated from the
digital outputs and the analog inputs.
REPLACING THE AD9432 WITH THE AD9433
The AD9433 is pin-compatible with the AD9432, although there
are two control pins on the AD9433 that are do not connect (DNC)
Table 10. AD9432/AD9433 Pin Differences
Pin
AD9432
AD9433
APPLICATIONS INFORMATION
LAYOUT INFORMATION
41
DNC
DFS
42
VCC
SFDR MODE
Using the AD9433 in an AD9432 pin assignment configures the
AD9433 as follows:
The SFDR improvement circuit is enabled.
The DFS pin floats low, selecting twos complement coding
for the digital outputs. (Twos complement coding is the
only output coding available on the AD9432.)
Table 11 summarizes the differences between the AD9432 and
AD9433 analog and encode input common-mode voltages.
These inputs can be ac-coupled so that the devices can be used
interchangeably.
Table 11. AD9432/AD9433 Analog and Encode Input
Common-Mode Voltages
Input Pins
Common-Mode Voltage
AD9432
AD9433
ENCODE/ENCODE
1.6 V
3.75 V
AIN/AIN
3.0 V
4.0 V
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