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参数资料
| 型号： | AD9753ASTZRL |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 0.011 us SETTLING TIME, 12-BIT DAC, PQFP48 |
| 封装： | 1.40 MM HEIGHT, ROHS COMPLIANT, PLASTIC, MS-026BBC, LQFP-48 |
| 文件页数： | 11/28页 |
| 文件大小： | 814K |
| 代理商： | AD9753ASTZRL |
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REV. B
AD9753
–19–
–30
START 100kHz
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
12.49MHz/
STOP 125MHz
REF
LV1
(dBm)
1RM
–74.34dBm
+9.71442886MHz
–76.86dBm
–80.96dBm
–11.92dBm
1 [T1]
CH PWR
ACP UP
ACP LOW
C11
C0
Cu1
C11
C0
Cu1
MARKER 1 [T1]
RBW
5kHz
RF ATT
0dB
–74.34dBm
VBW
50kHz
9.71442886MHz
SWT
12.5 s
UNIT
dBm
COMMENT A: 25 MSYMBOL, 64 QAM, CARRIER = 25MHz
1
Figure 28. Reconstructed 64-QAM Signal at a 25 MHz IF
A figure of merit for wideband signal synthesis is the ratio of
signal power in the transmitted band to the power in an adja-
cent channel. In Figure 28, the adjacent channel power ratio
(ACPR) at the output of the AD9753 is measured to be 65 dB.
The limitation on making a measurement of this type is often
not the DAC but the noise inherent in creating the digital data
record using computer tools. To find how much this is limiting
the perceived DAC performance, the signal amplitude can be
reduced, as is shown in Figure 29. The noise contributed by the
DAC will remain constant as the signal amplitude is reduced.
When the signal amplitude is reduced to the level where the
noise floor drops below that of the spectrum analyzer, the
ACPR will fall off at the same rate that the signal level is being
reduced. Under the conditions measured in Figure 28, this
point occurs in Figure 29 at –10 dBFS. This shows that the
data record is actually degrading the measured ACPR by up to
10 dB.
A single-channel active mixer such as the Analog Devices AD8343
can then be used for the hop to the transmit frequency. Figure 30
shows an applications circuit using the AD9753 and the AD8343.
The AD8343 is capable of mixing carriers from dc to 2.5 GHz.
Figure 31 shows the result of mixing the signal in Figure 28 up
to a carrier frequency of 800 MHz. ACPR measured at the
output of the AD8343 is shown in Figure 31 to be 59 dB.
AMPLITUDE (dBFS)
80
60
40
0
–10
–20
ACPR
(dB)
70
50
–15
–5
Figure 29. ACPR vs. Amplitude for QAM Carrier
DAC
LA
TCHES
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
AD9753
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 AD9753 and AD8343 Active Mixer
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9753-EB | 功能描述:BOARD EVAL FOR AD9753 RoHS:否 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:TxDAC+® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| AD9754 | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 125 MSPS High Performance TxDAC D/A Converter |
| AD9754AR | 功能描述:IC DAC 14BIT 125MSPS HP 28-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TxDAC® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
| AD9754ARRL | 制造商:Analog Devices 功能描述:DAC 1-CH 14-bit 28-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:14-BIT, 125 MSPS+ TXDAC D/A CONVERTER - Tape and Reel |
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