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| 型号： | AD680JTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/12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
100
500 μ V
50 μ s
In some applications, a varying load may be both resistive and
capacitive in nature, or the load may be connected to the
AD680 by a long capacitive cable.
90
+V IN
500 μ V
0.1 μ F
AD680
V OUT
V OUT
249 Ω
10
0%
V L
V OUT
0V
Figure 9. Transient Load Test Circuit
Figure 7. Broadband Noise at 300 kHz
TURN-ON TIME
Upon application of power (cold start), the time required for
the output voltage to reach its final value within a specified error
V L
100
90
2V
50mV
5 μ s
band is defined as the turn-on settling time. Two components
normally associated with this are the time for the active circuits
to settle, and the time for the thermal gradients on the chip to
stabilize. The turn-on settling time of the AD680 is about 20 μs
V OUT
V IN
100
5V
1mV
10 μ s
10
0%
90
Figure 10. Large Scale Transient Response
V OUT
10
100
2V
5mV
5 μ s
0%
Figure 8. Turn-On Settling Time
V IN
V OUT
90
The AD680 thermal settling characteristic benefits from its
compact design. Once initial turn-on is achieved, the output
linearly approaches its final value; the output is typically within
0.01% of its final value after 25 ms.
DYNAMIC PERFORMANCE
The output stage of the amplifier is designed to provide the
AD680 with static and dynamic load regulation superior to
less complete references. Figure 9 to Figure 11 display the char-
acteristics of the AD680 output amplifier driving a 0 mA to
10 mA load. Longer settling times result if the reference is
forced to sink any transient current.
Rev. H | Page 7 of 12
10
0%
Figure 11. Fine Scale Settling for Transient Load
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