參數(shù)資料
型號: AD9212ABCPZ-65
廠商: Analog Devices Inc
文件頁數(shù): 24/56頁
文件大?。?/td> 0K
描述: IC ADC 10BIT SRL 65MSPS 64LFCSP
標準包裝: 1
位數(shù): 10
采樣率(每秒): 65M
數(shù)據(jù)接口: 串行,SPI?
轉(zhuǎn)換器數(shù)目: 8
功率耗散(最大): 833mW
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: 64-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 64-LFCSP-VQ(9x9)
包裝: 托盤
輸入數(shù)目和類型: 16 個單端,單極;8 個差分,單極
AD9212
Data Sheet
Rev. E | Page 30 of 56
External Reference Operation
The use of an external reference may be necessary to enhance
the gain accuracy of the ADC or to improve thermal drift charac-
teristics. Figure 66 shows the typical drift characteristics of the
internal reference in 1 V mode.
When the SENSE pin is tied to AVDD, the internal reference is
disabled, allowing the use of an external reference. The external
reference is loaded with an equivalent 6 kΩ load. An internal
reference buffer generates the positive and negative full-scale
references, REFT and REFB, for the ADC core. Therefore, the
external reference must be limited to a nominal voltage of 1.0 V.
0.02
–0.18
–0.14
–0.10
–0.06
–0.02
–0.16
–0.12
–0.08
–0.04
0
–40
VR
EF
E
R
O
R
(
%
)
TEMPERATURE (°C)
05
96
8-
08
8
–20
0
2040
6080
Figure 66. Typical VREF Drift
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