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| 型号： | DAC5687IPZPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 0.0104 us SETTLING TIME, 16-BIT DAC, PQFP100 |
| 封装： | GREEN, PLASTIC, HTQFP-100 |
| 文件页数： | 63/79页 |
| 文件大小： | 2490K |
| 代理商： | DAC5687IPZPG4 |
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www.ti.com
B0040-01
y2
NCO
DAC
I
Q
RF
Processing
TRF3750
GC4116
GC5016
GC5316
DUC
DAC5687
CDC7005
y2
SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006
Figure 76. System Diagram of a Real IF System Using the DAC5687
With the DAC5687 in external clock mode, a low-phase-noise clock for the DAC5687 at the DAC sample rate
would be generated by a VCXO and PLL such as Texas Instruments CDC7005, which can also provide other
system clocks at the VCXO frequency divided by 2–n (n = 0 to 4). In this mode, the DAC5687 PLLLOCK pin
output would typically be used to clock the digital upconverter. With the DAC in PLL clock mode, the same input
rate clock would be used for the DAC clock and digital upconverter and the DAC internal PLL/VCO would
generate the DAC sample rate clock. Note that the internal PLL/VCO phase noise may degrade the quality of the
DAC output signal, and also has higher nonharmonic clock-related spurious signals (see the Nonharmonic
Clock-Related Spurious Signals section).
Either DACA or DACB outputs can be used (with the other DAC put into sleep mode) and would typically be
terminated with a transformer (see the Analog Current Outputs section). An IF filter, either LC or SAW, is used to
suppress the DAC Nyquist zone images and other spurious signals before being mixed to RF with a mixer.
An alternative architecture uses the DAC5687 in a dual-channel mode to create a dual-channel system with real
IF input and output. This would be used for narrower signal bandwidth and at the expense of less output
frequency placement flexibility (see Figure 77). Frequency upconversion can be accomplished by using the
high-pass filter and CMIX fDAC/2 mixing features.
66
Copyright 2005–2006, Texas Instruments Incorporated
Product Folder Link(s): DAC5687
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| DAC5687IPZPR | 功能描述:数模转换器- DAC 16-bit 500 MSPS 2-8x Interpolat’g Dual-Ch 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 |
| DAC5687IPZPRG4 | 功能描述:数模转换器- DAC 16-bit 500 MSPS 2-8x Interpolat’g Dual-Ch 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 |
| DAC5687MPZPEP | 功能描述:数模转换器- DAC 16B 500Msps 2X-8X Interp 2-Channel 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 |
| DAC5688 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL-CHANNEL, 16-BIT, 800 MSPS, 2x-8x INTERPOLATING DIGITAL-TO-ANALOG CONVERTER (DAC) |
| DAC5688_10 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL-CHANNEL, 16-BIT, 800 MSPS, 2x-8x INTERPOLATING DIGITAL-TO-ANALOG CONVERTER (DAC) |
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