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Application Note 9827
HSP-EVAL/HSP45116
CLOCK
NCOM EVALUATION BOARD
OR A DATA GENERATOR
HI5728EVAL1
DAC MODULE
HI5728
CIRCUIT
HSP-EVAL/HSP45116DB
NUMERICALLY
10 BITS
I Channel
CONTROLLED
OSCILLATOR
EVAL KIT
10 BITS
Q Channel
PC INTERFACE
+5V
POWER
SUPPLY
+5V
POWER
SUPPLY
50 ?
SMA
CABLE
SOFTWARE
INCLUDED
WITH HSP-EVAL
SPECTRUM ANALYZER
PERSONAL COMPUTER
FIGURE 2. INTERSIL HI5728/DDS EVALUATION SYSTEM SETUP BLOCK DIAGRAM
Appendix A Description of Architecture
The segmented current source architecture has the ability to
improve the converter’s performance by reducing the
amount of current that is switching at any one time. In
traditional architectures, major transition points required the
converter to switch on or off large amounts of current. In a
traditional 10-bit R/2R ladder design, for example, the
midscale transition required approximately equal amounts of
currents switching on and off. In a segmented current source
arrangement, transitions such as midscale become one in
which you simply have an additional intermediate current
source turning on and several minor ones turning off. In the
case of the HI5728, there are 31 intermediate current
segments that represent the 5 MSBs and ?ve, binary-
3-5
weighted current sources representing each of the ?ve
LSBs. See the Functional Block Diagram in the data sheet
for a visual representation. To relate the midscale transition
example to the HI5728, consider the following: The code
0111111111 would be represented by 15 intermediate
current segments and each of the 5 LSB current sources all
turned on. To transition to code 1000000000 would simply
require turning off the 5 LSB current sources and turning on
the next intermediate current segment, bringing the total
amount of current switching at this ‘major’ code transition
equal to the same amount switching at 30 other code
transition points in the code ramp from 0 to 1023, so that the
total glitch energy is distributed more evenly.
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相关PDF资料
HI5731-EVS EVALUATION PLATFORM SOIC HI5731
HI5741-EVS EVALUATION PLATFORM HI5741
HI5760EVAL1 EVALUATION PLATFORM SOIC HI5760
HI5762EVAL2 EVALUATION MOD FOR HI5762 AMP
HI5767EVAL1 EVALUATION PLATFORM HI5767
HI5767EVAL2 EVALUATION PLATFORM HI5767
HI5805EVAL1 EVALUATION PLATFORM HI5805
HI5828EVAL2 EVALUATION PLATFORM HI5828
相关代理商/技术参数
HI5728EVALI 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述:
HI5728IN 功能描述:DAC DUAL 10BIT 125MHZ 48-TQFP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:2,400 系列:- 设置时间:- 位数:18 数据接口:串行 转换器数目:3 电压电源:模拟和数字 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:36-TFBGA 供应商设备封装:36-TFBGA 包装:带卷 (TR) 输出数目和类型:* 采样率（每秒）:*
HI5728IN-T 功能描述:DAC DUAL 10BIT 125MHZ 48-TQFP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:2,400 系列:- 设置时间:- 位数:18 数据接口:串行 转换器数目:3 电压电源:模拟和数字 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:36-TFBGA 供应商设备封装:36-TFBGA 包装:带卷 (TR) 输出数目和类型:* 采样率（每秒）:*
HI5728INZ 功能描述:数模转换器- DAC W/ANNEAL 48 TQFP IND D/A 10BIT 125MHZ 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
HI5728INZ-T 功能描述:数模转换器- DAC W/ANNEAL 10 BIT DL DAC 125MSPS 48 LQFP 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
HI5731 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:12-Bit, 100MSPS, High Speed D/A Converter
HI5731_04 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:12-Bit, 100MSPS, High Speed D/A Converter
HI5731BIB 功能描述:IC DAC 12-BIT 100MSPS 28-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:2,400 系列:- 设置时间:- 位数:18 数据接口:串行 转换器数目:3 电压电源:模拟和数字 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:36-TFBGA 供应商设备封装:36-TFBGA 包装:带卷 (TR) 输出数目和类型:* 采样率（每秒）:*