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参数资料
| 型号： | DC1111A |
| 厂商： | Linear Technology |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | BOARD DAC LTC2753-16 |
| 软件下载： | QuikEval System |
| 设计资源： | DC1111A Design File DC1111A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval™, SoftSpan™ |
| DAC 的数量： | 2 |
| 位数： | 16 |
| 数据接口： | 并联 |
| 设置时间： | 2µs |
| DAC 型： | 电流 |
| 工作温度： | 0°C ~ 70°C |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTC2753-16 |
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LTC2753
19
2753f
APPLICATIONS INFORMATION
Op amp offset will contribute mostly to output offset and
gain error, and has minimal effect on INL and DNL. For
example, for the LTC2753-16 with a 5V reference in 5V
unipolar mode, a 250μV op amp offset will cause a 3.3LSB
zero-scale error and a 3.3LSB gain error; but only 0.8LSB
of INL degradation and 0.2LSB of DNL degradation.
While not directly addressed by the simple equations in
Tables 4 and 5, temperature effects can be handled just as
easily for unipolar and bipolar applications. First, consult
an op amp’s data sheet to nd the worst-case VOS and IB
over temperature. Then, plug these numbers in the VOS
and IB equations from Table 5 and calculate the tempera-
ture-induced effects.
For applications where fast settling time is important, Ap-
plication Note 74, Component and Measurement Advances
Ensure 16-Bit DAC Settling Time, offers a thorough discus-
sion of 16-bit DAC settling time and op amp selection.
Precision Voltage Reference Considerations
Much in the same way selecting an operational amplier
for use with the LTC2753 is critical to the performance of
the system, selecting a precision voltage reference also
requires due diligence. The output voltage of the LTC2753
is directly affected by the voltage reference; thus, any
voltage reference error will appear as a DAC output volt-
age error.
There are three primary error sources to consider when
selecting a precision voltage reference for 16-bit appli-
cations: output voltage initial tolerance, output voltage
temperature coefcient and output voltage noise.
Initial reference output voltage tolerance, if uncorrected,
generates a full-scale error term. Choosing a reference
with low output voltage initial tolerance, like the LT1236
(±0.05%), minimizes the gain error caused by the reference;
however, a calibration sequence that corrects for system
zero- and full-scale error is always recommended.
A reference’s output voltage temperature coefcient af-
fects not only the full-scale error, but can also affect the
circuit’s apparent INL and DNL performance. If a refer-
ence is chosen with a loose output voltage temperature
coefcient, then the DAC output voltage along its transfer
characteristic will be very dependent on ambient conditions.
Minimizing the error due to reference temperature coef-
cient can be achieved by choosing a precision reference
with a low output voltage temperature coefcient and/or
tightly controlling the ambient temperature of the circuit
to minimize temperature gradients.
As precision DAC applications move to 16-bit and higher
performance, reference output voltage noise may con-
tribute a dominant share of the system’s noise oor. This
in turn can degrade system dynamic range and signal-to-
noise ratio. Care should be exercised in selecting a voltage
reference with as low an output noise voltage as practi-
cal for the system resolution desired. Precision voltage
references, like the LT1236, produce low output noise in
the 0.1Hz to 10Hz region, well below the 16-bit LSB level
in 5V or 10V full-scale systems. However, as the circuit
bandwidths increase, ltering the output of the reference
may be required to minimize output noise.
Table 7. Partial List of LTC Precision References Recommended
for Use with the LTC2753 with Relevant Specications
REFERENCE
INITIAL
TOLERANCE
TEMPERATURE
DRIFT
0.1Hz to 10Hz
NOISE
LT1019A-5,
LT1019A-10
±0.05%
5ppm/°C
12μVP-P
LT1236A-5,
LT1236A-10
±0.05%
5ppm/°C
3μVP-P
LT1460A-5,
LT1460A-10
±0.075%
10ppm/°C
20μVP-P
LT1790A-2.5
±0.05%
10ppm/°C
12μVP-P
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| DC1111C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:D_1111C Series, Ultra Compact InGaN/SiC SMT LED |
| DC1111C-TR | 功能描述:LED BLUISH-GREEN 0603 SMD RoHS:是 类别:光电元件 >> LED - 1111C 标准包装:500 系列:Screenmaster® 颜色:琥珀 Millicandela 等级:2260mcd 正向电压:2.1V 电流 - 测试:20mA 波长 - 主:590nm 波长 - 峰值:- 视角:- 透镜类型:散射，有色 透镜样式/尺寸:圆顶椭圆，5.1mm x 3.7mm 封装/外壳:径向 尺寸/尺寸:- 高度:7.00mm 安装类型:通孔 包装:散装 在特定电流下的光通量 - 测试:- |
| DC1-1-12/12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DC1-1-12/15 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DC1-1-12/5 | 制造商:SL POWER ELECTRONICS INC.- AULT 功能描述:Module DC-DC 1-OUT 5V 0.1A 1W 12-Pin |
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