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參數(shù)資料
| 型號(hào)： | ADR540BRT-R2 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | High Precision Shunt Mode Voltage References |
| 中文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 4.096 V, PDSO3 |
| 封裝： | TO-236AB, SOT-23, 3 PIN |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 210K |
| 代理商： | ADR540BRT-R2 |
ADR520/ADR525/ADR530/ADR540/ADR550
Stacking ADR5xx for User-Definable Outputs
Multiple ADR5xx parts can be stacked together to allow the
user to obtain a desired higher voltage. Figure 22a shows three
ADR550s configured to give 15 V. The bias resistor, R
BIAS
, is
chosen using Equation 3, noting that the same bias current will
flow through all the shunt references in series. Figure 22b shows
three ADR550s stacked together to give –15 V. R
BIAS
is calculated
in the same manner as before. Parts of different voltages can
also be added together, i.e., an ADR525 and an ADR550 can be
added together to give an output of +7.5 V or –7.5 V, as desired.
Note, however, that the initial accuracy error is now the sum of
the errors of all the stacked parts, as are the tempco and output
voltage change versus input current.
Rev. A | Page 12 of 16
0
ADR550
ADR550
ADR550
+V
DD
+15V
R
GND
ADR550
ADR550
ADR550
GND
(a)
(b)
–15V
R
–V
DD
Figure 22. 15 V Output with Stacked ADR550s
Adjustable Precision Voltage Source
The ADR5xx, combined with a precision low input bias op amp,
such as the AD8610, can be used to output a precise adjustable
voltage. Figure 23 illustrates the implementation of this
application using the ADR5xx. The output of the op amp,
V
OUT
,
is determined by the gain of the circuit, which is completely
dependant on the resistors,
R1
and
R2
.
V
OUT
= (1 +
R2/R1
)
V
REF
An additional capacitor, C1, in parallel with R2, can be added to
filter out high frequency noise. The value of C1 is dependent on
the value of R2.
0
ADR5xx
V
CC
GND
R
BIAS
R1
R2
C1
(OPTIONAL)
V
REF
AD8610
V
OUT
= V
REF
(1+R2/R1)
Figure 23. Adjustable Voltage Source
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADR540BRT-REEL7 | 制造商:Rochester Electronics LLC 功能描述:4.096V SHUNT REFERENCE - Tape and Reel 制造商:Analog Devices 功能描述: |
| ADR540BRTZ-REEL7 | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Analog Devices 功能描述: |
| ADR545ART | 制造商:Analog Devices 功能描述:- Bulk |
| ADR545BRT | 制造商:Analog Devices 功能描述:- Bulk |
| ADR550 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Precision Shunt Mode Voltage References |
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