參數(shù)資料
型號: AD7305BR-REEL
廠商: Analog Devices Inc
文件頁數(shù): 9/20頁
文件大小: 0K
描述: IC DAC 8BIT QUAD R-R 20-SOIC
產(chǎn)品培訓模塊: Data Converter Fundamentals
DAC Architectures
標準包裝: 1,000
設(shè)置時間: 1µs
位數(shù): 8
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 4
電壓電源: 雙 ±
功率耗散(最大): 60mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
供應商設(shè)備封裝: 20-SOIC W
包裝: 帶卷 (TR)
輸出數(shù)目和類型: 4 電壓,單極;4 電壓,雙極
采樣率(每秒): 1M
AD7304/AD7305
Rev. C | Page 17 of 20
APPLICATIONS
The AD7304/AD7305 are inherently 2-quadrant multiplying
DACs. That is, they can easily be set up for unipolar output
operation. The full-scale output polarity is the same as the
reference input voltage polarity.
In some applications, it may be necessary to generate the full
4-quadrant multiplying capability or a bipolar output swing.
This is easily accomplished using an external true rail-to-rail op
amp, such as the OP295. Connecting the external amplifier with
two equal value resistors, as shown in Figure 38, results in a full
4-quadrant multiplying circuit. In this circuit, the amplifier
provides a gain of two, which increases the output span
magnitude to 10 V. The transfer equation of this circuit shows
that both negative and positive output voltages are created as
the input data (D) is incremented from code zero (VOUT = –5 V)
to midscale (VOUT = 0 V) to full scale (VOUT = +5 V).
REF
OUT
V
D
V
×
=
1
128
(2)
+5V
10k
10k
AD7304
REF
–5V
< V
OUT < +5V
01114-038
2.2pF
Figure 38. 4-Quadrant Multiplying Application Circuit
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