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1ADR1581BRTZ-REEL 参数 Datasheet PDF下载

1ADR1581BRTZ-REEL图片预览
型号: 1ADR1581BRTZ-REEL
PDF下载: 下载PDF文件 查看货源
内容描述: 1.25 V微功耗,精密并联型电压基准 [1.25 V Micropower, Precision Shunt Voltage Reference]
分类和应用:
文件页数/大小: 12 页 / 520 K
品牌: ADI [ ADI ]
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ADR1581  
1.2508  
1.2506  
1.2504  
1.2502  
1.2500  
1.2498  
1.2496  
1.2494  
1.2492  
1.2490  
1.2488  
600  
500  
400  
300  
200  
100  
0
(V  
– V )  
O
MAX  
SLOPE = TC =  
(+85°C – +25°C) × 1.250V × 10  
–6  
V
MAX  
V
O
(V  
– V )  
O
MIN  
SLOPE = TC =  
–6  
(–40°C – +25°C) × 1.250V × 10  
V
MIN  
–55  
–35  
–15  
5
25  
45  
65  
85  
105  
125  
–55  
–35  
–15  
5
25  
45  
65  
85  
105  
125  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
Figure 12. Output Voltage vs. Temperature  
Figure 13. Residual Drift Error  
For example, the ADR1581BRT initial tolerance is 1.5 mV;  
REVERSE VOLTAGE HYSTERESIS  
a
50 ppm/°C temperature coefficient corresponds to an error  
A major requirement for high performance industrial  
band of 4.1 mV (50 ꢂ 10−6 ꢂ 1.250 V ꢂ 65°C). Therefore, the  
unit is guaranteed to be 1.250 V 5.6 mV over the operating  
temperature range.  
equipment manufacturers is a consistent output voltage at  
nominal temperature following operation over the operating  
temperature range. This characteristic is generated by measuring  
the difference between the output voltage at +25°C after operating  
at +85°C and the output voltage at +25°C after operating at −40°C.  
Figure 14 displays the hysteresis associated with the ADR1581.  
This characteristic exists in all references and has been minimized  
in the ADR1581.  
Duplication of these results requires a combination of high  
accuracy and stable temperature control in a test system. Evaluation  
of the ADR1581 produces curves similar to those in Figure 4  
and Figure 12.  
VOLTAGE OUTPUT NONLINEARITY VS.  
TEMPERATURE  
40  
35  
30  
25  
20  
15  
10  
5
When a reference is used with data converters, it is important to  
understand how temperature drift affects the overall converter  
performance. The nonlinearity of the reference output drift  
represents additional error that is not easily calibrated out of the  
system. The usual way of showing the reference output drift is to  
plot the reference voltage vs. temperature (see Figure 12). An  
alternative method is to draw a straight line between the  
temperature endpoints and measure the deviation of the output  
from the straight line. This shows the same data in a different  
format. This characteristic (see Figure 13) is generated by  
normalizing the measured drift characteristic to the endpoint  
average drift. The residual drift error of approximately 500 ppm  
shows that the ADR1581 is compatible with systems that require  
10-bit accurate temperature performance.  
0
–400 –300 –200 –100  
0
100  
200  
300  
400  
HYSTERESIS VOLTAGE (µV)  
Figure 14. Reverse Voltage Hysteresis Distribution  
Rev. 0 | Page 7 of 12