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參數(shù)資料
| 型號(hào)： | AD1585A |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
| 中文描述： | 2.5 V至5.0 V微功耗，高精度電壓基準(zhǔn) |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 254K |
| 代理商： | AD1585A |
AD1582/AD1583/AD1584/AD1585
–11–
REV. D
AC PERFORMANCE
To apply the AD1582/AD1583/AD1584/AD1585 family of
references, it is important to understand the effects of dynamic
output impedance and power supply rejection. In Figure 8a, a
voltage divider is formed by the AD1582’s output impedance and
by the external source impedance. Figure 8b shows the effect of
varying the load capacitor on the reference output. Power supply
rejection ratio (PSRR) should be determined when characterizing
the ac performance of a series voltage reference. Figure 9a shows a
test circuit used to measure PSRR, and Figure 9b demonstrates
the AD1582’s ability to attenuate line voltage ripple.
2
V
OUT
10k
10k
2V
100 A
10k
2k
V
LOAD
DC
5V
5 F
1 F
DUT
1
Figure 8a. Output Impedance Test Circuit
100
1
0.1
10
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
1 F CAP
AD1585
AD1582
O
Figure 8b. Output Impedance vs. Frequency
5V 100mV
0.22 F
DUT
0.22 F
V
OUT
10V
10k
10k
200mV
1
Figure 9a. Ripple Rejection Test Circuit
FREQUENCY (Hz)
100
90
0
1
1M
10
100
1k
10k
100k
50
20
P
80
70
60
40
30
10
AD1582
AD1585
Figure 9b. Ripple Rejection vs. Frequency
NOISE PERFORMANCE AND REDUCTION
The noise generated by the AD1582 is typically less than
70
μ
V p-p over the 0.1 Hz to 10 Hz frequency band. Figure 10
shows the 0.1 Hz to 10 Hz noise of a typical AD1582. The noise
measurement is made with a high gain band-pass filter. Noise in
a 10 Hz to 10 kHz region is approximately 50
μ
V rms. Figure 11
shows the broadband noise of a typical AD1582. If further noise
reduction is desired, a 1-pole low-pass filter may be added
between the output pin and the ground. A time constant of 0.2 ms
has a –3 dB point at roughly 800 Hz, and reduces the high
frequency noise to about 16
μ
V rms. It should be noted,
however, that while additional filtering on the output may improve
the noise performance of the AD1582/AD1583/AD1584/AD1585
family, the added output impedance could degrade the ac
performance of the references.
100
90
10
0%
10 V
1s
Figure 10. 0.1 Hz to 10 Hz Voltage Noise
10
0%
100
90
10ms
100 V
Figure 11. 10 Hz to 10 kHz Wideband Noise
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD1585ART | 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
| AD1585ARTRL | 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
| AD1585B | 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
| AD1585BRT | 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
| AD1582ART-R2 | 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD1585ART | 制造商:Analog Devices 功能描述: |
| AD1585ART-R2 | 制造商:Analog Devices 功能描述:V-Ref Precision 5V 5mA 3-Pin SOT-23 T/R 制造商:Rochester Electronics LLC 功能描述:IC, 4.1V MICROPOWER REF - Bulk |
| AD1585ART-REEL | 制造商:Rochester Electronics LLC 功能描述:IC, 5V MICROPOWER REF - Tape and Reel |
| AD1585ART-REEL7 | 制造商:Analog Devices 功能描述:V-Ref Precision 5V 5mA 3-Pin SOT-23 T/R 制造商:Rochester Electronics LLC 功能描述:IC, 5V MICROPOWER REF - Tape and Reel 制造商:Analog Devices 功能描述:Voltage Reference IC |
| AD1585ARTRL | 制造商:AD 制造商全稱:Analog Devices 功能描述:2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References |
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