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參數(shù)資料
| 型號： | AD9777BSV |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | 16-Bit, 160 MSPS 2X/4X/8X Interpolating Dual TxDAC+ D/A Converter |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 0.011 us SETTLING TIME, DAC WITH PROGRAMMABLE PLL, PQFP80 |
| 封裝： | MO-026ADD-HD, TQFP-80 |
| 文件頁數(shù)： | 31/48頁 |
| 文件大?。?/td> | 6021K |
| 代理商： | AD9777BSV |
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REV. 0
AD9777
–31–
The entire upconversion from baseband to transmit frequency is
represented graphically in Figure 33. The resulting spectrum
shown in Figure 33 represents the complex data consisting of
the baseband real and imaginary channels, now modulated onto
orthogonal (cosine and negative sine) carriers at the transmit
frequency. It is important to remember that in this application
(two baseband data channels), the image rejection is not
dependent on the data at either of the AD9777 input channels.
In fact, image rejection will still occur with either one or both of
the AD9777 input channels active. Note that by changing the
sign of the sinusoidal multiplying term in the complex modula-
tor, the upper sideband image could have been suppressed while
passing the lower one. This is easily done in the AD9777 by
selecting the e
+j t
bit (Register 01h, Bit 1). In purely complex
terms, Figure 31 represents the two-stage upconversion from
complex baseband to carrier.
REAL CHANNEL (IN)
IMAGINARY CHANNEL (IN)
DC
DC
A
B
COMPLEX
MODULATOR
REAL CHANNEL (OUT)
IMAGINARY CHANNEL (OUT)
–F
C
*
B/2J
–B/2J
TO QUADRATURE
MODULATOR
–F
C
–F
C
–F
C
F
C
F
C
–F
C
F
C
A/2J
–A/2J
B/2
B/2
A/2
A/2
REAL
IMAGINARY
QUADRATURE
MODULATOR
OUT
A/4 + B/4J
A/4 – B/4J
–F
Q
– F
C
REJECTED IMAGES
A/4 + B/4J
A/4 – B/4J
A/4 + B/4J
A/4 – B/4J
–A/4 – B/4J
–A/4 + B/4J
A/2 + B/2J
A/2 – B/2J
–F
Q
*
–F
Q
+ F
C
F
Q
– F
C
F
Q
F
Q
+ F
C
–F
Q
F
Q
–F
Q
F
Q
*
FC = COMPLEX MODULATION FREQUENCY
*
FQ = QUADRATURE MODULATION FREQUENCY
Figure 33. Two-Stage Upconversion and Resulting Image Rejection
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD9777BSVRL | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 16-bit 80-Pin TQFP EP T/R |
| AD9777BSVZ | 功能描述:IC DAC 16BIT DUAL 160MSPS 80TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:TxDAC+® 標準包裝:1 系列:- 設置時間:4.5µs 位數(shù):12 數(shù)據(jù)接口: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:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| AD9777BSVZ | 制造商:Analog Devices 功能描述:IC 16-BIT DAC ((NW)) 制造商:Analog Devices 功能描述:IC, DAC, 16BIT, 400MSPS, TQFP-80 |
| AD9777BSVZ | 制造商:Analog Devices 功能描述:IC DAC 16BIT 400MSPS 80TQFP |
| AD9777BSVZRL | 功能描述:IC DAC 16BIT DUAL 160MSPS 80TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:TxDAC+® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設置時間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
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