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| 型号： | AD680JTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.5V TO-92-3 |
| 标准包装： | 100 |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.5V |
| 容差： | ±0.4% |
| 温度系数： | 30ppm/°C |
| 输入电压： | 4.5 V ~ 36 V |
| 通道数： | 1 |
| 电流 - 静态： | 250µA |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-226-3、TO-92-3 标准主体 |
| 供应商设备封装： | TO-92-3 |
| 包装： | 散装 |
| 产品目录页面： | 795 (CN2011-ZH PDF) |
AD680
+V IN
TEMPERATURE PERFORMANCE
0.1 μ F
AD680
V OUT
C L
1000pF
V L
V OUT
249 Ω
V OUT
0V
The AD680 is designed for reference applications where tem-
perature performance is important. Extensive temperature
testing and characterization ensure that the device’s performance
is maintained over the specified temperature range.
Some confusion exists in the area of defining and specifying
Figure 12. Capacitive Load Transient Response Test Circuit
1,000 pF, 0 mA to 10 mA load.
reference voltage error over temperature. Historically, references
have been characterized using a maximum deviation per degree
centigrade, that is, ppm/°C. However, because of nonlinearities
in temperature characteristics that originated in standard Zener
references (such as “S” type characteristics), most manufac-
turers now use a maximum limit error band approach to specify
devices. This technique involves measuring the output at three
V L
100
90
2V
5mV
5 μ s
or more different temperatures to specify an output voltage
error band.
2.501
SLOPE = TC
V OUT
2.500
=
=
V MAX – V MIN
(T MAX – T MIN ) × 2.5V × 10 –6
2.501 – 2.498
(85 ° C – (–40 ° C)) × 2.5V × 10 –6
10
0%
2.499
2.498
= 9.6ppm/ ° C
Figure 13. Output Response with Capacitive Load
–50
–30
–10 0 20 40
60
80
100
LOAD REGULATION
the AD680.
TEMPERATURE ( ° C)
Figure 15. Typical AD680AN/AD680AR Temperature Drift
AD680AR and illustrates the test methodology. The box in
V L
100
90
1V
1mV
100 μ s
ing temperature extremes, and on the top and bottom by the
maximum and minimum output voltages measured over the
operating temperature range.
The maximum height of the box for the appropriate temperature
V OUT
10
0%
Figure 14. Typical Load Regulation Characteristics
range and device grade is shown in Table 4. Duplication of these
results requires a combination of high accuracy and stable tem-
perature control in a test system. Evaluation of the AD680 will
produce a curve similar to that in Figure 15, but output readings
could vary depending upon the test equipment used.
Table 4. Maximum Output Change in mV
Maximum Output Change (mV)
Device Grade
AD680JN/AD680JR
AD680JT
AD680AN
Rev. H | Page 8 of 12
0°C to 70°C
4.375
5.250
Not applicable
?40°C to +85°C
Not applicable
Not applicable
6.250
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