參數(shù)資料
型號(hào)： AD7808
廠商： Analog Devices, Inc.
英文描述： +3.3 V to +5 V Quad/Octal 10-Bit DACs
中文描述： 3.3伏至5伏四/八通道10位DAC
文件頁數(shù)： 18/28頁
文件大?。?/td> 300K
代理商： AD7808
AD7804/AD7805/AD7808/AD7809
REV. A
–18–
OFFSET BINARY CODING
Table VIII shows the offset binary transfer function for the Main
DAC
.
Table VIII. Offset Binary Code Table for Main DAC
Digital Inputs
MSB . . . LSB
Analog Output
1111111111
1111111110
1000000001
1000000000
0111111111
0000000001
0000000000
V
BIAS
+1.875
×
V
BIAS
(1023–512)/1024
V
BIAS
+1.875
×
V
BIAS
(1022–512)/1024
V
BIAS
+1.875
×
V
BIAS
/1024
V
BIAS
V
BIAS
+1.875
×
V
BIAS
(511–512)/1024
V
BIAS
+1.875
×
V
BIAS
(1–512)/1024
V
BIAS
/16
NOTE: The span range is (30/16)
×
V
BIAS
= 1.875
×
V
BIAS
V
BIAS
D
000
001
DAC INPUT CODE
1FF 200 201
3FE
3FF
V
BIAS
31
16
V
BIAS
Figure 25. Main DAC Output Voltage vs. DAC Input Codes
(HEX) for Offset Binary Coding
Figure 25 shows the Main DAC transfer function when offset
binary coding is used. With offset binary coding selected the
output voltage can be calculated as follows:
V
OUT
' =
V
BIAS
+ 1.875
×
V
BIAS
×
((
NA
-512)/1024)
where NA is the decimal equivalent of the offset binary input
code. NA ranges from 0 to 1023.
Table IX shows the offset binary transfer function for the Sub
DAC. Figure 26 shows the Sub DAC transfer function for
offset binary coding. Any Sub DAC output voltage can be
expressed as:
V
OUT
" =
V
BIAS
/16
×
[(
NB
-128)/256]
where NB is the decimal equivalent of the offset binary input
code. NB ranges from 0 to 255.
Table VI and Figure 22 show the analog outputs available for
the above configuration. The following is the procedure re-
quired if the complete transfer function needs to be offset
around the V
BIAS
point. Table VII and Figure 23 show the ana-
log output variations available from the Sub DAC.
System Control Register Write:
MODE = 0, address inputs (A2, A1, A0) are don’t cares.
Write 020 Hex
Configure part for 10-bit parallel, twos
complement coding, normal operation
Channel Control Register Write:
MODE = 0, address inputs (A2, A1, A0) select desired channel.
Write 091 Hex
Internal V
DD
/2 selected as V
BIAS
for
DAC, and any DAC data writes that
follow are to the Sub DAC.
DAC Data Register Write:
MODE = 1, address inputs (A2, A1, A0) select desired channel.
Write XX Hex
With MODE = 1 all data writes are to
the selected DACs Sub DAC. XX is the
required data. 7F Hex will give zero scale
and 80 Hex will give full scale from the
Sub DAC.
Channel Control Register Write:
MODE = 0, address inputs (A2, A1, A0) select desired channel.
Write 011 Hex
Internal V
DD
/2 selected as V
BIAS
for
DAC, and any DAC data writes that
follow are to the Main DAC.
DAC Data Register Write:
MODE = 1, address inputs (A2, A1, A0) select desired channel.
Write XXX Hex With MODE = 1 all data writes are to
the selected Main DAC. XXX is the
required data. 1FF Hex will give zero
scale and 200 Hex will give full scale
from the DAC.
相關(guān)PDF資料
PDF描述
AD7809 +3.3 V to +5 V Quad/Octal 10-Bit DACs
AD7804 +3.3 V to +5 V Quad/Octal 10-Bit DACs
AD7804BN ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84%
AD7804BR +3.3 V to +5 V Quad/Octal 10-Bit DACs
AD7805BN %2B3.3V to %2B5V Quad/Octal 10-Bit DACs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7808BN 制造商:Analog Devices 功能描述:DAC 8-CH 10-bit 24-Pin PDIP Tube 制造商:Analog Devices 功能描述:10BIT DAC OCTAL SERIAL 7808 DIP24
AD7808BNZ 功能描述:IC DAC 10BIT OCTAL SERIAL 24DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時(shí)間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:*
AD7808BNZ 制造商:Analog Devices 功能描述:10BIT DAC OCTAL SERIAL 7808 DIP24
AD7808BR 功能描述:IC DAC 10BIT 3.3V OCTAL 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 標(biāo)準(zhǔn)包裝:750 系列:- 設(shè)置時(shí)間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:雙 ± 功率耗散（最大）:100mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-LCC（J 形引線） 供應(yīng)商設(shè)備封裝:28-PLCC（11.51x11.51） 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:143k
AD7808BR-REEL 功能描述:IC DAC 10BIT OCTAL SRL 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 標(biāo)準(zhǔn)包裝:750 系列:- 設(shè)置時(shí)間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:雙 ± 功率耗散（最大）:100mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-LCC（J 形引線） 供應(yīng)商設(shè)備封裝:28-PLCC（11.51x11.51） 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:143k
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