參數(shù)資料
型號： DAC5674EVM
廠商： Texas Instruments
文件頁數(shù)： 5/39頁
文件大?。?/td> 0K
描述： EVAL MODULE FOR DAC5674
產(chǎn)品培訓(xùn)模塊： Data Converter Basics
標(biāo)準(zhǔn)包裝： 1
系列： CommsDAC™
DAC 的數(shù)量： 1
位數(shù)： 14
采樣率（每秒）： 400M
數(shù)據(jù)接口： 并聯(lián)
設(shè)置時(shí)間： 20ns
DAC 型： 電流
工作溫度： -40°C ~ 85°C
已供物品： 板
已用 IC / 零件： DAC5674
相關(guān)產(chǎn)品： DAC5674IPHPRG4-ND - IC DAC 14BIT 400MSPS 48-HTQFP
DAC5674IPHPR-ND - IC DAC 14BIT 400MSPS 48-HTQFP
DAC5674IPHPG4-ND - IC DAC 14BIT 400MSPS 48-HTQFP
296-15726-ND - IC DAC 14BIT 400MSPS 48-HTQFP
其它名稱： 296-30860
DAC5674EVM-ND
DAC5674
SLWS148A SEPTEMBER 2003 REVISED OCTOBER 2005
www.ti.com
13
DETAILED DESCRIPTION
Figure 1 shows a simplified block diagram of the DAC5674. The CMOS device consists of a segmented array
of PMOS current sources, capable of delivering a full-scale output current up to 20 mA. Differential current
switches direct the current of each current source to either one of the complementary output nodes IOUT1 or
IOUT2. The complementary output currents thus enable differential operation, canceling out common mode
noise sources (digital feedthrough, on-chip, and PCB noise), dc offsets, even-order distortion components, and
increase signal output power by a factor of two.
The full-scale output current is set using an external resistor RBIAS in combination with an on-chip band-gap
voltage reference source (1.2 V) and control amplifier. The current IBIAS through resistor RBIAS is mirrored
internally to provide a full-scale output current equal to 32 times IBIAS. The full-scale current can be adjusted
from 20 mA down to 2 mA.
Interpolation Filter
The interpolation filters FIR1 and FIR2 can be configured for either low-pass or high-pass response. In this way,
higher order images can be selected. Table 1 shows the DAC IF output range for the different filter response
combinations, for both the first and second Nyquist zone (after interpolation). Table 2 lists the DAC IF output
ranges for two popular GSM data rates. Table 3 shows the W-CDMA IF carrier center frequency for an input
data rate of 61.44 MSPS and a fundamental input IF of 15.36 MHz. Figure 15 shows the spectral response;
the corresponding nonzero tap weights are:
D [5, 20, 50, 108, 206, 361, 597, 947, 1467, 2267, 3633, 6617, 20746, 32768]
f / fin
150
100
50
0
0.0
0.2
0.4
0.6
0.8
1.0
Amplitude
dB
AMPLITUDE
vs
FREQUENCY
f / fin
0.0
0.2
0.4
0.6
0.8
1.0
0.005
Amplitude
dB
AMPLITUDE
vs
FREQUENCY
0.005
0.000
Figure 15. FIR1 and FIR2 Magnitude Spectrum
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DAC5674IPHP 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 400 CommsDAC 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
DAC5674IPHPG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 400 CommsDAC 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
DAC5674IPHP-ND 制造商: 功能描述: 制造商:undefined 功能描述:
DAC5674IPHPR 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 400 CommsDAC 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
DAC5674IPHPRG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 400 CommsDAC 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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