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参数资料
| 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： | 33/79页 |
| 文件大小： | 2490K |
| 代理商： | DAC5687IPZPG4 |
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Σ
Q(t)
I(t)
11
10
qmc_gain_a/210
{0, 1/210, ..., 2 – 1/210}
X
qmc_phase/210
{–1/2, –1/2 + 1/210, ..., 1/2 – 1/210}
qmc_gain_b/210
{0, 1/210, ..., 2 – 1/210}
B016401
L-
O
L-
O
side-
band
side-
band
Uncorrected
Corrected
C003
DAC Offset Control
SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006
Figure 40. QMC Block Diagram
Figure 41. Example of Sideband Optimization Using QMC Phase and Gain Adjustments
Registers daca_offset and dacb_offset control the I and Q path offsets and are 13-bit values with a range of
–4096 to 4095. The DAC offset value adds a digital offset to the digital data before digital-to-analog conversion.
The qmc_gain_a and qmc_gain_b registers can be used to back off the signal before the offset to prevent
saturation when the offset value is added to the digital signal. The offset values are in 2s-complement format.
It takes four DAC clock cycles to update the 14-bit DAC5687 offset registers. During the first clock cycle, the two
MSBs,
daca_offset(13:12)
and
dacb_offset(13:12),
are
updated,
followed
by
daca_offset(11:8)
and
dacb_offset(11:8) on the second clock cycle, daca_offset(7:4) and dacb_offset(7:4) on the third clock cycle, and
daca_offset(3:0) and dacb_offset(3:0) on the fourth clock cycle.
Copyright 2005–2006, Texas Instruments Incorporated
39
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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