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参数资料
| 型号： | MAX5884EGM+D |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/18页 |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT 3.3V 200MSPS 48-QFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 43 |
| 设置时间： | 11ns |
| 位数： | 14 |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 电压电源： | 模拟和数字 |
| 功率耗散（最大）： | 134mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-QFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN-EP（7x7） |
| 包装： | 管件 |
| 输出数目和类型： | 2 电流，单极 |
| 采样率（每秒）： | 200M |
MAX5884
3.3V, 14-Bit, 200Msps High Dynamic
Performance DAC with CMOS Inputs
12
______________________________________________________________________________________
A dominant specification is ACLR, a parameter which
reflects the ratio of the power in the desired carrier
band to the power in an adjacent carrier band. The
specification covers the first two adjacent bands, and is
measured on both sides of the desired carrier.
According to the transmit mask for CDMA and W-CDMA
architectures, the power ratio of the integrated carrier
channel energy to the integrated adjacent channel
energy must be >45dB for the first adjacent carrier slot
(ACLR 1) and >50dB for the second adjacent carrier
slot (ACLR 2). This specification applies to the output of
the entire transmitter signal chain. The requirement for
only the DAC block of the transmitter must be tighter,
with a typical margin of >15dB, requiring the DAC’s
ACLR 1 to be better than 60dB.
Adjacent channel leakage is caused by a single spread-
spectrum carrier, which generates intermodulation (IM)
products between the frequency components located
within the carrier band. The energy at one end of the
carrier band generates IM products with the energy
from the opposite end of the carrier band. For single-
carrier W-CDMA modulation, these IMD products are
spread 3.84MHz over the adjacent sideband. Four con-
tiguous W-CDMA carriers spread their IM products over
a bandwidth of 20MHz on either side of the 20MHz total
carrier bandwidth. In this four-carrier scenario, only the
energy in the first adjacent 3.84MHz sideband is con-
sidered for ACLR 1. To measure ACLR, drive the con-
verter with a W-CDMA pattern. Make sure that the
signal is backed off by the peak-to-average ratio, such
that the DAC is not clipping the signal. ACLR can then
be measured with the ACLR measurement function built
into your spectrum analyzer.
Figure 8 shows the ACLR performance for a single
W-CDMA carrier (fCLK = 184.32MHz, fOUT = 30.72MHz)
applied to the MAX5884 (including measurement system
limitations*).
Figure 9 illustrates the ACLR test results for the
MAX5884 with a four-carrier W-CDMA signal at an out-
put frequency of 30.72MHz and a sampling frequency
of 184.32MHz. Considerable care must be taken to
ensure accurate measurement of this parameter.
MAX5884
T2, 1:1
T1, 1:1
VOUT, SINGLE ENDED
WIDEBAND RF TRANSFORMER T2
PERFORMS THE DIFFERENTIAL TO
SINGLE-ENDED CONVERSION.
50
100
50
IOUTP
IOUTN
B0–B13
14
AVDD
DVDD
VCLK
AGND
DGND
CLKGND
Figure 6. Differential to Single-Ended Conversion Using a Wideband RF Transformer
MAX5884
50
100
50
IOUTP
IOUTN
B0–B13
14
AVDD
DVDD
VCLK
AGND
DGND
CLKGND
OUTP
OUTN
Figure 7. MAX5884 Differential Output Configuration
*Note that due to their own IM effects and noise limitations, spectrum analyzers introduce ACLR errors, which can falsify the measure-
ment. For a single-carrier ACLR measurement greater than 70dB, these measurement limitations are significant, becoming even more
restricting for multicarrier measurement. Before attempting an ACLR measurement, it is recommended consulting application notes pro-
vided by major spectrum analyzer manufacturers that provide useful tips on how to use their instruments for such tests.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5884EGM-TD | 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| MAX5885EGM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX5885EGM+D | 功能描述:数模转换器- DAC 16-Bit 200Msps DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| MAX5885EGM+TD | 功能描述:数模转换器- DAC 16-Bit 200Msps DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| MAX5885EGM-D | 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
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