参数资料
| 型号： | DAC5674IPHPRG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 5/39页 |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT 400MSPS 48-HTQFP |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 1,000 |
| 系列： | CommsDAC™ |
| 设置时间： | 20ns |
| 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）： | 550mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-TQFP 裸露焊盘 |
| 供应商设备封装： | 48-HTQFP（7x7） |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 2 电流，单极 |
| 采样率（每秒）： | 400M |
| 配用： | 296-30860-ND - EVAL MODULE FOR DAC5674 |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC5675 | 制造商:TI 制造商全称:Texas Instruments 功能描述:14-BIT, 400-MSPS DIGITAL-TO-ANALOG CONVERTER |
| DAC5675A | 制造商:TI 制造商全称:Texas Instruments 功能描述:14-Bit, 400MSPS Digital-to-Analog Converter |
| DAC5675AEVM | 功能描述:数据转换 IC 开发工具 DAC5675A Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| DAC5675AIPHP | 功能描述:数模转换器- DAC 14-Bit 400-MSPS 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 |
| DAC5675AIPHP | 制造商:Texas Instruments 功能描述:IC DAC 14BIT 400MSPS 48-HTQFP |
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