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參數(shù)資料
| 型號： | AD7628KRZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 8BIT DUAL W/BUFF 20-SOIC |
| 產品培訓模塊： | Data Converter Fundamentals DAC Architectures |
| 標準包裝： | 37 |
| 設置時間： | 400ns |
| 位數(shù)： | 8 |
| 轉換器數(shù)目： | 2 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 450mW |
| 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） |
| 供應商設備封裝： | 20-SOIC W |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 2 電流，單極；2 電流，雙極 |
| 采樣率（每秒）： | 2.9M |
AD7628
–7–
REV. A
MICROPROCESSOR INTERFACE
Figure 11. AD7628 Dual DAC to 6800 CPU Interface
PROGRAMMABLE WINDOW COMPARATOR
Figure 13. Digitally Programmable Window Comparator
(Upper and Lower Limit Detector)
PROGRAMMABLE STATE VARIABLE FILTER
Figure 12. AD7628 Dual DAC to 8085 CPU Interface
In the circuit of Figure 13, the AD7628 is used to implement a
programmable window comparator. DACs A and B are loaded
with the required upper and lower voltage limits for the test,
respectively. If the test input is not within the programmed lim-
its, the pass/fail output will indicate a fail (logic zero).
In this state, variable or universal filter configuration (Figure
14) for DACs A1 and B1 control the gain and Q of the filter
characteristic, while DACs A2 and B2 control the cutoff fre-
quency, fC. DACs A2 and B2 must track accurately for the simple
expression for fC to hold. This is readily accomplished by the
AD7628. Op amps are 2
× AD644. C3 compensates for the
effects of op amp gain-bandwidth limitations.
The filter provides low pass, high pass and band pass outputs
and is ideally suited for applications where microprocessor con-
trol of filter parameters is required, e.g., equalizer, tone con-
trols, etc.
Programmable range for component values shown is fC = 0 kHz
to 15 kHz and Q = 0.3 to 4.5.
Figure 14. Digitally Controlled State Variable Filter
CIRCUIT EQUATIONS
C1 = C2, R1 = R2, R4 = R5
fC =
1
2
π R
1 C1
Q =
R
3
R
4
.
R
F
R
FBB1
AO = –
R
F
R
S
NOTE
DAC equivalent resistance equals
256
× DAC Ladder resistance
()
DAC Digital Code
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD7628KRZ | 制造商:Analog Devices 功能描述:IC 8-BIT DAC |
| AD7628KRZ-REEL | 功能描述:IC DAC DUAL 8BIT BUFFERED 20SOIC 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 設計資源:Unipolar, Precision DC Digital-to-Analog Conversion using AD5450/1/2/3 8-14-Bit DACs (CN0052) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053) AC Signal Processing Using AD5450/1/2/3 Current Output DACs (CN0054) Programmable Gain Element Using AD5450/1/2/3 Current Output DAC Family (CN0055) Single Supply Low Noise LED Current Source Driver Using a Current Output DAC in the Reverse Mode (CN0139) 標準包裝:10,000 系列:- 設置時間:- 位數(shù):12 數(shù)據(jù)接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 轉換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 薄型，TSOT-23-8 供應商設備封裝:TSOT-23-8 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
| AD7628TE | 制造商:Rochester Electronics LLC 功能描述:CMOS DUAL 8 BIT D/A CONV - Bulk |
| AD7628TQ | 制造商:Rochester Electronics LLC 功能描述:CMOS DUAL 8 BIT D/A CONVE - Bulk |
| AD7628TQ/883B | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 8-bit 20-Pin CDIP Tube 制造商:Analog Devices 功能描述:DAC 2CH R-2R 8BIT 20CDIP - Rail/Tube |
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