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參數(shù)資料
| 型號(hào)： | MAX5887EGK |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | 3.3V, 14-Bit, 500Msps High Dynamic Performance DAC with Differential LVDS Inputs |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 0.011 us SETTLING TIME, 14-BIT DAC, QCC68 |
| 封裝： | 10 X 10 MM, 0.9 MM HEIGHT, MO-220, QFN-68 |
| 文件頁(yè)數(shù)： | 12/18頁(yè) |
| 文件大小： | 982K |
| 代理商： | MAX5887EGK |
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M
3.3V, 14-Bit, 500Msps High Dynamic
Performance DAC with Differential LVDS Inputs
12
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transformer to ground. If no transformer is used, each
DAC output should be terminated to ground with a 50
resistor. Additionally, a 100
resistor should be placed
between the outputs (Figure 8).
If a single-ended unipolar output is desirable, IOUTP
should be selected as the output, with IOUTN ground-
ed. However, driving the MAX5887 single ended is not
recommended since additional noise is added (from
the ground plane) in such configurations.
The distortion performance of the DAC depends on the
load impedance. The MAX5887 is optimized for a 50
double termination. It can be used with a transformer
output as shown in Figure 7 or just one 50
resistor
from each output to ground and one 50
resistor
between the outputs. This produces a full-scale output
power of up to 0dBm, depending on the output current
setting. Higher termination impedance can be used at
the cost of degraded distortion performance and
increased output noise voltage.
Adjacent Channel Leakage Power Ratio
(ACLR) Testing for CDMA- and
W-CDMA-Based Base Station
Transceiver Systems (BTS)
The transmitter sections of BTS applications serving
CDMA and W-CDMA architectures must generate carri-
ers with minimal coupling of carrier energy into the adja-
cent channels. Similar to the GSM/EDGE model (see the
Multitone Testing for GSM/EDGE Applications
section), a
transmit mask (Tx mask) exists for this application. The
spread-spectrum modulation function applied to the carri-
er frequency generates a spectral response, which is uni-
form over a given bandwidth (up to 4MHz) for a
W-CDMA-modulated carrier.
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 integrat-
ed 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 adja-
cent 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, requir-
ing the DAC’s ACLR 1 to be better than 60dB. Adjacent
channel leakage is caused by a single spread-spec-
trum 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-
MAX5887
T2, 1:1
T1, 1:1
V
OUT
, SINGLE ENDED
WIDEBAND RF TRANSFORMER T2
PERFORMS THE DIFFERENTIAL TO
SINGLE-ENDED CONVERSION.
50
100
50
IOUTP
IOUTN
B0–B13
14
AV
DD
DV
DD
VCLK
AGND
DGND
CLKGND
Figure 7. Differential to Single-Ended Conversion Using a Wideband RF Transformer
MAX5887
50
100
50
IOUTP
IOUTN
B0–B13
14
AV
DD
DV
DD
VCLK
AGND
DGND
CLKGND
OUTP
OUTN
Figure 8. MAX5887 Differential Output Configuration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5887EGK/GG8 | 制造商:Maxim Integrated Products 功能描述:3.3V, 14-BIT, 500MBPS HIGH DYNAMIC PERFORMAN - Rail/Tube |
| MAX5887EGK+D | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 500Msps DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5887EGK+TD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 500Msps DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5887EGK-D | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5887EGK-TD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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