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AD1585ART-R2 Datasheet

  • AD1585ART-R2

  • 2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...

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AD1582/AD1583/AD1584/AD1585
AC PERFORMANCE
NOISE PERFORMANCE AND REDUCTION
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鈥檚 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鈥檚 ability to attenuate line voltage ripple.
V
LOAD
DC
10k
2
V
OUT
1
100 A
2V
10k
1 F
10k
DUT
2k
5 F
5V
The noise generated by the AD1582 is typically less than
70
碌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
碌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 鈥? dB point at roughly 800 Hz, and reduces the high
frequency noise to about 16
碌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.
10 V
100
90
1s
Figure 8a. Output Impedance Test Circuit
100
1 F CAP
OUTPUT IMPEDANCE ( )
10
0%
10
AD1585
Figure 10. 0.1 Hz to 10 Hz Voltage Noise
AD1582
1
100 V
100
90
10ms
0.1
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
Figure 8b. Output Impedance vs. Frequency
10
0%
10k
10V
1
200mV
10k
0.22 F
DUT
5V
100mV
V
OUT
0.22 F
Figure 11. 10 Hz to 10 kHz Wideband Noise
Figure 9a. Ripple Rejection Test Circuit
100
90
80
70
AD1582
PSRR (dB)
60
50
AD1585
40
30
20
10
0
1
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
Figure 9b. Ripple Rejection vs. Frequency
REV. D
鈥?1鈥?/div>

AD1585ART-R2相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    TRANSISTOR | BJT | PNP | 30V V(BR)CEO | 4A I(C) | TO-3
    ETC
  • 英文版
    24-Bit ADC WITH LOW NOISE PGA
    AD
  • 英文版
    24-Bit ADC WITH LOW NOISE PGA
    AD [Analog...
  • 英文版
    24-Bit ADC WITH LOW NOISE PGA
    AD
  • 英文版
    24-Bit ADC WITH LOW NOISE PGA
    AD [Analog...
  • 英文版
    1.2 V Micropower, Precision Shunt Voltage Reference
    AD
  • 英文版
    1.2 V Micropower, Precision Shunt Voltage Reference
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    2.5 V to 5.0 V Micropower, Precision Series Mode Voltage Ref...
    AD [Analog...
  • 英文版
    TRANSISTOR | BJT | PNP | 30V V(BR)CEO | 4A I(C) | TO-3
    ETC

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