- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1893 > AD9755ASTZRL (Analog Devices Inc)IC DAC 14BIT 300MSPS 48-LQFP PDF資料下載
參數(shù)資料
| 型號： | AD9755ASTZRL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 14BIT 300MSPS 48-LQFP |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Fundamentals DAC Architectures |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 系列： | TxDAC+® |
| 設(shè)置時(shí)間： | 11ns |
| 位數(shù)： | 14 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 模擬和數(shù)字 |
| 功率耗散（最大）： | 165mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極；2 電流，雙極 |
| 采樣率（每秒）： | 300M |
| 配用： | AD9755-EB-ND - BOARD EVAL FOR AD9755 |
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頁當(dāng)前第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頁第24頁第25頁第26頁第27頁第28頁
REV. B
AD9755
–20–
–30
CENTER 860MHz
–40
–50
–60
–70
–80
–90
–110
–120
11MHz/
SPAN 110MHz
FREQUENCY (MHz)
REFERENCE
LEVEL
(dBm)
COMMENT A: 25 MSYMBOL, 64 QAM, CARRIER = 825MHz
A
1 [T1]
CH PWR
ACP UP
ACP LOW
1 [T2]
2 [T2]
–100.55dBm
859.91983968MHz
–66.52dBm
–60.16dBm
–6.86dBm
33.62dBm
–49.91983968MHz
33.62dBm
–49.91983968MHz
2
CU1
CL1
C0
–100.55dBm
859.91983968MHz
VBW
10kHz
SWT
2.8s UNIT dBm
–20
CU1
–100
CL1
2mA
Figure 31. Signal of Figure 28 Mixed to Carrier
Frequency of 800 MHz
Effects of Noise and Distortion on Bit Error Rate (BER)
Textbook analysis of Bit Error Rate (BER) performance is gen-
erally stated in terms of E (energy in watts-per-symbol or
watts-per-bit) and NO (spectral noise density in watts/Hz). For
QAM signals, this performance is shown graphically in Figure 32.
M represents the number of levels in each quadrature PAM signal
(i.e., M = 8 for 64 QAM, M = 16 for 256 QAM). Figure 32
implies gray coding in the QAM constellation, as well as the use
of matched filters at the receiver, which is typical. The
horizontal axis of Figure 32 can be converted to units of energy/
symbol by adding to the horizontal axis 10 log of the number of
bits in the desired curve. For instance, to achieve a BER of 1e-6
with 64 QAM, an energy per bit of 20 dB is necessary. To
calculate energy per symbol, add 10 log(6) or 7.8 dB. Therefore
64 QAM with a BER of 1e-6 (assuming no source or channel
coding) can theoretically be achieved with an energy/symbol-
to-noise (E/NO) ratio of 27.8 dB. Due to the loss and interferers
inherent in the wireless path, this signal-to-noise ratio must be
realized at the receiver to achieve the given bit error rate.
Distortion effects on BER are much more difficult to determine
accurately. Most often in simulation, the energies of the strongest
distortion components are root-sum-squared with the noise, and
the result is treated as if it were all noise. That being said, if the
example above of 64 QAM with the BER of 1e-6, using the E/NO
ratio is much greater than the worst-case SFDR, the noise will
dominate the BER calculation.
The AD9755 has a worst-case in-band SFDR of 47 dB at the
upper end of its frequency spectrum (see TPCs 2, 3). When
used to synthesize high level QAM signals as described above,
noise, as opposed to distortion, will dominate its performance in
these applications.
SNR /BIT (dB)
1E0
1E–3
1E–6
20
5
0
SYMBOL
ERR
OR
PR
OB
ABILITY 1E–2
1E–5
1E–1
1E–4
10
15
16 QAM
64 QAM
4 QAM
Figure 32. Probability of a Symbol Error for QAM
DAC
LATCHES
DAC
INPUT
LATCHES
INPUT
LATCHES
PLL/DIVIDER
CLK+ CLK– PLLLOCK
DVDD AVDD
IOUTA
IOUTB
PORT 1
DATA
INPUT
PORT 2
DATA
INPUT
RSET2
1.9k
FSADJ
0.1 F
REFIO ACOM1 ACOM DCOM
AD9755
50
0.1 F
68
INPM
INPP
LOIM
LOIP
OUTP
OUTM
AD8343 ACTIVE MIXER
0.1 F
LOINPUT
M/A-COM ETC-1-1-13 WIDEBAND BALUN
Figure 30. QAM Transmitter Architecture Using AD9755 and AD8343 Active Mixer
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9762ARU | IC DAC 12BIT 125MSPS 28-TSSOP |
| AD9764AR | IC DAC 14BIT 125MSPS 28-SOIC |
| AD9779BSVZ | IC DAC 16BIT DUAL 1GSPS 100TQFP |
| AD9786BSVZRL | IC DAC 16BIT INTERPOL/SP 80TQFP |
| AD9788BSVZRL | IC DAC 16BIT 800MSPS 100TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9755-EB | 功能描述:BOARD EVAL FOR AD9755 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:TxDAC+® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| AD976 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 100 kSPS/200 kSPS BiCMOS A/D Converters |
| AD9760 | 制造商:AD 制造商全稱:Analog Devices 功能描述:10-Bit, 125 MSPS TxDAC D/A Converter |
| AD9760-50AR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10-Bit Digital-to-Analog Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。