参数资料
型号: AD586TQ
厂商: Analog Devices Inc
文件页数: 11/16页
文件大小: 0K
描述: IC VREF SERIES PREC 5V 8-CERDIP
标准包装: 1
基准类型: 串联,精度
输出电压: 5V
容差: ±2.5mV
温度系数: 10ppm/°C
输入电压: 10.8 V ~ 36 V
通道数: 1
电流 - 静态: 3mA
电流 - 输出: 10mA
工作温度: -55°C ~ 125°C
安装类型: 通孔
封装/外壳: 8-CDIP(0.300",7.62mm)
供应商设备封装: 8-CERDIP
包装: 管件
AD586
5 V REFERENCE WITH MULTIPLYING
CMOS DACs OR ADCs
The AD586 is ideal for applications with 10- and 12-bit
22V TO 46V
2
V IN
multiplying CMOS DACs. In the standard hookup, as shown
in Figure 20, the AD586 is paired with the AD7545 12-bit
AD586
V OUT 6
TRIM 5
10k ?
15V
multiplying DAC and the AD711 high speed BiFET op amp.
The amplifier DAC configuration produces a unipolar 0 V to
?5 V output range. Bipolar output applications and other
operating details can be found in the individual product data
GND
4
2
V IN
sheets.
+15V
+15V
R2
68 ?
2
V OUT 6
AD586
TRIM 5
GND
10k ?
10V
0.1 μ F
2
4
2
V IN
AD586
V OUT 6
TRIM 5
GND
19
10k ?
18
V DD
V REF
AD7545K
20
R FB
OUT 1 1
AGND 2
DGND
+15V
C1
33pF
7
AD711K 6
3
0.1 μ F
V OUT
0 V TO –5V
V IN
V OUT 6
AD586
TRIM 5
GND
4
4
10k ?
5V
4
DB11 TO DB0
3
–15V
Figure 22. Multiple AD586s Stacked for Precision 5 V, 10 V, and 15 V Outputs
Figure 20. Low Power 12-Bit CMOS DAC Application
The AD586 can also be used as a precision reference for multi-
ple DACs. Figure 21 shows the AD586, the AD7628 dual DAC,
and the AD712 dual op amp hooked up for single-supply opera-
tion to produce 0 V to ?5 V outputs. Because both DACs are on
the same die and share a common reference and output op
amps, the DAC outputs will exhibit similar gain TCs.
PRECISION CURRENT SOURCE
The design of the AD586 allows it to be easily configured as a
current source. By choosing the control resistor R C in Figure 23,
the user can vary the load current from the quiescent current
(typically, 2 mA) to approximately 10 mA. The compliance volt-
age of this circuit varies from about 5 V to 21 V, depending on
the value of V IN .
+V IN
+15V
+15V
2
V IN
V OUT 6
AD586
GND
4
V REF A
DATA
INPUTS
4
14
7
17
DB0
DB7
3
RFB A
DAC A
AD7628
OUT A
AGND
RFB B
2
1
19
AD712
V OUT A =
0 TO –5V
2
V IN
AD586
GND
4
V OUT 6
R C
(500 ? MIN)
I L =
5V
R C
+ I BIAS
V REF B
4
DAC B
DGND
OUT B
20
V OUT B =
0 TO –5V
Figure 23. Precision Current Source
PRECISION HIGH CURRENT SUPPLY
5
Figure 21. AD586 as a 5 V Reference for a CMOS
STACKED PRECISION REFERENCES FOR
MULTIPLE VOLTAGES
Often, a design requires several reference voltages. Three
AD586s can be stacked, as shown in Figure 22, to produce
For higher currents, the AD586 can easily be connected to a
power PNP or power Darlington PNP device. The circuit in
Figure 24 and Figure 25 can deliver up to 4 amps to the load.
The 0.1 μF capacitor is required only if the load has a significant
capacitive component. If the load is purely resistive, improved
high frequency supply rejection results can be obtained by
removing the capacitor.
5.000 V, 10.000 V, and 15.000 V outputs. This scheme can be
extended to any number of AD586s, provided the maximum
load current is not exceeded. This design provides the addi-
tional advantage of improved line regulation on the 5.0 V
output. Changes in V IN of 18 V to 50 V produce output changes
that are below the noise level of the references.
Rev. G | Page 11 of 16
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