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参数资料
| 型号： | HI5741-EVS |
| 厂商： | Intersil |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | EVALUATION PLATFORM HI5741 |
| 标准包装： | 1 |
| DAC 的数量： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 100M |
| 数据接口： | 并联 |
| 设置时间： | 20ns |
| DAC 型： | 电流 |
| 工作温度： | -40°C ~ 85°C |
| 已供物品： | 板 |
| 已用 IC / 零件： | HI5741 |
Application Note 9626
I15
V
GLITCH AREA = 1/2 (H x W)
BIT 13 (MSB)
BIT 12
I14
I13
HEIGHT (H)
BIT 11
BIT 10
I12
I11
WIDTH (W)
FIGURE 3. GLITCH AREA
t(ps)
4-BIT BINARY
I10
I9
I8
Since the glitch is a transient event, this leads designers to
believe that a simple low pass ?lter can be used to eliminate
or reduce the size of the glitch. In effect, low pass ?ltering a
glitch tends to “smear” the event and does little to remove
the energy of the transient.
TO
THERMOMETER
I7
Input Timing/Logic Levels
DECODER
I6
I5
I4
I3
I2
I1
SUMMING
JUNCTION (I OUT )
The HI5741 has a maximum clock rate speci?cation of
100MHz. The data setup time before the 50% point of the
rising edge of the clock is t S = 3ns (Min) and the hold time is
t H = 0.5ns (Min). Logic levels are 0.8V (Max) for an input low
and 2.0V (Min) for a logic high. The HI5741 is both TTL and
CMOS input compatible.
D11 - D0
CLK
FIGURE 2. THERMOMETER DECODER
t S
t H
FIGURE 4. HI5741 DATA TIMING
Designing to Minimize Glitch
One cause of Glitch is the time skew between bits of the
incoming digital data. Typically the switching time of digital
inputs are asymmetrical, meaning that the turn off time is
faster than the turn on time. Unequal delay paths through the
device can cause one current source to change before
another. To minimize this, the Intersil HI5741 employes an
internal register just prior to the current sources which is
updated on the rising clock edge. In traditional DACs the
worst case glitch usually occurs at the major transition i.e.,
01 1111 1111 1111 to 10 0000 0000 0000. But in the HI5741
the worst case glitch is moved to the 00 0011 1111 1111 to
11 1100 000 0000 transition. This is achieved by the split
R/2R segmented current source architecture. This
decreases the amount of current switching at any one time
and reduces the glitch by a factor of 16.
Integral Linearity
The HI5741 has a full-scale range of 20.48mA. When driving
a 64 ? load the full scale voltage swing is 0V to -1V (the
internal 227 ? ladder resistance in parallel with the 64 ? load
results in an equivalent 50 ? load resistance). Most video
and communication applications use a 1V P-P voltage swing
which yields 20.48mA full scale current sink capability. With
a 1V P-P voltage swing on the HI5741 output an LSB is:
LSB = Full Scale Range/(2 N -1)
where N is the number of bits and the Full Scale Range is
1V P-P .
The LSB size for this application is 62.5 μ V. To determine the
Integral Linearity of the HI5741 the bit weights of each major
transition is taken. The Best Fit Straight Line method is used
to calculate the overall INL. Measurements are taken at bits
0 through 9 at each bit transition. Then all combinations of
the upper 4 bits are measured. Finally some worst case
codes are measured and the full scale is measured. Once
this is completed a best ?t straight line is drawn through the
data points and the worst case deviation is determined.
3-2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HI5746 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 40 MSPS A/D Converter |
| HI5746_04 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 40MSPS A/D Converter |
| HI5746EVAL1 | 功能描述:EVALUATION PLATFORM HI5746 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| HI5746KCA | 功能描述:IC ADC 10-BIT 40MSPS 28-SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| HI5746KCAZ | 功能描述:模数转换器 - ADC A/D 10-BIT 40MSPS 28 SSOP COM TEMP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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