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參數(shù)資料
| 型號(hào)： | MAX5884EGM+TD |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 5/18頁(yè) |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT 3.3V 200MSPS 48-QFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 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）： | 134mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-QFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-QFN-EP（7x7） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極 |
| 采樣率（每秒）： | 200M |
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MAX5884
3.3V, 14-Bit, 200Msps High Dynamic
Performance DAC with CMOS Inputs
______________________________________________________________________________________
13
Multitone Testing for GSM/EDGE
Applications
The transmitter sections of multicarrier base station
transceiver systems for GSM/EDGE usually present
communication DAC manufacturers with the difficult
task of providing devices with higher resolution, while
simultaneously reducing noise and spurious emissions
over a desired bandwidth.
To specify noise and spurious emissions from base sta-
tions, a GSM/EDGE Tx mask is used to identify the DAC
requirements for these parameters. This mask shows
that the allowable levels for noise and spurious emis-
sions are dependent on the offset frequency from the
transmitted carrier frequency. The GSM/EDGE mask
and its specifications are based on a single active car-
rier with any other carriers in the transmitter being dis-
abled. Specifications displayed in Figure 10 support
per-carrier output power levels of 20W or greater.
Lower output power levels yield less stringent emission
requirements.
For GSM/EDGE applications, the DAC demands spuri-
ous emission levels of less than -80dBc for offset fre-
quencies
≥6MHz. Spurious products from the DAC can
combine with both random noise and spurious prod-
ucts from other circuit elements. The spurious products
from the DAC should therefore be backed off by 6dB or
more to allow for these other sources and still avoid sig-
nal clipping.
The number of carriers and their signal levels with
respect to the full scale of the DAC are important as
well. Unlike a full-scale sine wave, the inherent nature
of a multitone signal contains higher peak-to-RMS
ratios, raising the prospect for potential clipping, if the
signal level is not backed off appropriately. If a trans-
mitter operates with four/eight in-band carriers, each
individual carrier must be operated at less than
-12dB FS/-18dB FS to avoid waveform clipping.
The noise density requirements (Table 2) for a
GSM/EDGE-based system can again be derived from
the system’s Tx mask. With a worst-case noise level of
-80dBc at frequency offsets of
≥6MHz and a measure-
ment bandwidth of 100kHz, the minimum noise density
per hertz is calculated as follows:
SNRMIN = -80dBc - 10 log10(100 103Hz)
SNRMIN = -130dBc/Hz
Since random DAC noise adds to both the spurious tones
and to random noise from other circuit elements, it is rec-
ommended reducing the specification limits by about
10dB to allow for these additional noise contributions
while maintaining compliance with the Tx mask values.
-120
-90
-110
-100
-80
-70
-60
-50
-40
-30
ANALOG
OUTPUT
POWER
(dBm)
-20
4MHz/div
fCLK = 184.32MHz
fCENTER = 30.72MHz
ACLR = 72dB
Figure 8. ACLR for W-CDMA Modulation, Single Carrier
-120
-110
-80
-90
-100
-70
-60
-50
-40
-30
-20
ANALOG
OUTPUT
POWER
(dBm)
4MHz/div
fCLK = 184.32MHz, fCENTER = 30.72MHz
ACLR = 68dB
Figure 9. ACLR for W-CDMA Modulation, Four Carriers
O
-30
-60
-70
-73
-75
-80
-90
0.2
0.4 0.6
1.2
1.8
6.0
IMD REQUIREMENT: < -70dBc
30kHz 100kHz
MEASUREMENT BANDWIDTH
TRANSMITTER
EDGE
INBAND
OUTBAND
WORST-CASE
NOISE LEVEL
AMPLITUDE
(dBc)
FREQUENCY OFFSET FROM CARRIER (MHz)
Figure 10. GSM/EDGE Tx Mask Requirements
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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:數(shù)模轉(zhuǎn)換器- DAC 16-Bit 200Msps 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 |
| MAX5885EGM+TD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit 200Msps 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 |
| MAX5885EGM-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 |
| MAX5885EGM-T | 制造商:Maxim Integrated Products 功能描述:3.3V, 16-BIT, 200MSPS HIGH DYNAMIC PERFORMAN - Tape and Reel |
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