- 您現(xiàn)在的位置：買賣IC網 > PDF目錄373917 > AD7809BST (ANALOG DEVICES INC) +3.3 V to +5 V Quad/Octal 10-Bit DACs PDF資料下載
參數(shù)資料
| 型號： | AD7809BST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | +3.3 V to +5 V Quad/Octal 10-Bit DACs |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 1.5 us SETTLING TIME, 10-BIT DAC, PQFP44 |
| 封裝： | PLASTIC, TQFP-44 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大?。?/td> | 300K |
| 代理商： | AD7809BST |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當前第24頁第25頁第26頁第27頁第28頁
AD7804/AD7805/AD7808/AD7809
REV. A
–24–
APPLICATIONS
Opto-Isolated Interface for Process Control Applications
The AD7804/AD7808 has a versatile serial three-wire serial
interface making it ideal for generating accurate voltages in
process control and industrial applications. Due to noise, safety
requirements, or distance, it may be necessary to isolate the
AD7804/AD7808 from the controller. This can easily be
achieved by using opto-isolators which will provide isolation in
excess of 3 kV. The serial loading structure of the AD7804/
AD7808 makes it ideally suited for use in opto-isolated appli-
cations. Figure 41 shows an opto-isolated interface to the
AD7804/AD7808 where SDIN, CLKIN and
FSIN
are driven
from optocouplers.
LDAC
is hardwired low to reduce the number
of interface lines and this ensures that each DAC is updated follow-
ing the sixteenth serial clock of a write cycle.
AD7804/
AD7808
AV
DD
V
DD
1
V
OUT
A
V
OUT
B
V
OUT
C
V
OUT
D
AGND
DGND
LDAC
CLR
CLKIN
DV
DD
REFIN
0.1
m
F
10
m
F
REFOUT
REG+5V
CLKIN
V
DD
10k
V
FSIN
FSIN
SDIN
DATA
POWER
1 TO 10nF
V
DD
10k
V
V
DD
10k
V
Figure 41. AD7804/AD7808 Opto-Isolated Interface
Decoding Multiple AD7808s
The
FSIN
pin on the AD7808s can be used in applications to
decode a number of DACs. In this application all DACs in the
system receive the same serial clock and serial data, but only the
FSIN
to one of the DACs will be active at any one time allowing
access to eight channels in this thirty-two channel system. The
74HC139 is used as a 2- to 4-line decoder to address any of the
DACs in the system. To prevent timing errors from occurring
the enable input should be brought to its inactive state while the
coded address inputs are changing state. Figure 42 shows a
system decoding multiple AD7808s in a multichannel system.
ENABLE
74HC139
DGND
AD7808
FSIN
SDIN
CLKIN
AD7808
FSIN
SDIN
CLKIN
AD7808
FSIN
SDIN
CLKIN
LDAC
LDAC
LDAC
SDIN
CLKIN
CODED
ADDRESS
1
G
1A
1B
1Y0
1Y1
1Y2
1Y3
V
CC
V
DD
AD7808
FSIN
SDIN
CLKIN
LDAC
Figure 42. Decoding Multiple AD7808s Using the
FSIN
Pin
AD7805 As a Digitally Programmable Window Detector
A digitally programmable upper/lower limit detector using two
DACs in the AD7805 is shown in Figure 43. The upper and
lower limits for the test are loaded to DACs A and B that in
turn set the limits on the CMP04. If a signal at the V
IN
input is
not within the programmed window an LED will indicate the
fail condition. Only one limit detector is shown below but can
easily be adapted for a dual channel system by using the extra
DACs on the AD7805 and the two unused comparators on the
CMP04.
+5V
0.01
m
F
AD7805
AV
DD
DV
DD
V
OUT
A
V
OUT
B
V
OUT
C
V
OUT
D
AGND
DGND
LDAC
CLR
COMP
MODE
CS
WR
D9
D0
DV
DD
0.1
m
F
10
m
F
0.01
m
F
PASS/
FAIL
1k
V
FAIL
1k
PASS
1/2
CMP04
1/6
74HC05
V
IN
Figure 43. Digitally Programmable Window Detector
相關PDF資料 |
PDF描述 |
|---|---|
| AD7810YRM | 2.7 V to 5.5 V, 2 us, 10-Bit ADC in 8-Lead microSOIC/DIP |
| AD7810 | 2.7 V to 5.5 V, 2 us, 10-Bit ADC in 8-Lead microSOIC/DIP |
| AD7810YN | 2.7 V to 5.5 V, 2 us, 10-Bit ADC in 8-Lead microSOIC/DIP |
| AD7810YR | ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75% |
| AD7813YRU | +2.7 V to +5.5 V, 400 kSPS 8-/10-Bit Sampling ADC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD7809BST-REEL | 制造商:Analog Devices 功能描述:DAC 8-CH 10-bit 44-Pin TQFP T/R |
| AD7809BSTZ | 功能描述:IC DAC 10BIT OCTAL PARALL 44TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 設置時間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 電壓電源:單電源 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:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類型:2 電壓，單極 采樣率（每秒）:* 產品目錄頁面:1398 (CN2011-ZH PDF) |
| AD7809BSTZ-REEL | 功能描述:IC DAC 10BIT OCTAL PARALL 44TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:- 產品培訓模塊:Data Converter Fundamentals DAC Architectures 標準包裝:750 系列:- 設置時間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉換器數(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） 供應商設備封裝: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 |
| AD780AN | 功能描述:IC VREF SERIES SHUNT PREC 8-PDIP RoHS:否 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:- 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:5V 容差:±0.5% 溫度系數(shù):100ppm/°C 輸入電壓:- 通道數(shù):1 電流 - 陰極:80µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應商設備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| AD780ANZ | 功能描述:IC VREF SERIES SHUNT PREC 8-PDIP RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:- 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:3V 容差:±0.5% 溫度系數(shù):100ppm/°C 輸入電壓:- 通道數(shù):1 電流 - 陰極:82µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-TSSOP（5 引線），SC-88A，SOT-353 供應商設備封裝:SC-70-5 包裝:帶卷 (TR) 其它名稱:296-20888-2 |
發(fā)布緊急采購，3分鐘左右您將得到回復。