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AD588
Each AD588 A and B grade unit is tested at ?25°C, 0°C, +25°C,
+50°C, +70°C, and +85°C. This approach ensures that the
variations of output voltage that occur as the temperature
changes within the specified range is contained within a box
whose diagonal has a slope equal to the maximum specified
drift. The position of the box on the vertical scale changes from
The AD588 has three amplifiers that can be used to implement
Kelvin connections. Amplifier A2 is dedicated to the ground
force-sense function, while uncommitted Amplifier A3 and
Amplifier A4 are free for other force-sense chores.
R
device to device as initial error and the shape of the curve vary.
I=0
V = 10V
Maximum height of the box for the appropriate temperature
range is shown in Figure 13. Duplication of these results
requires a combination of high accuracy and stable temperature
10V
+
–
R
I L
V = 10V – RI L
R LOAD
R
I=0
I L
V = 10V – RI L
R LOAD
control in a test system. Evaluation of the AD588 produces a
curve similar to that in Figure 12, but output readings may vary,
depending on the test methods and equipment utilized.
DEVICE MAXIMUM OUTPUT CHANGE (mV)
GRADE 0°C TO +70°C –25°C TO +85°C –55°C TO +125°C
Figure 14. Advantage of Kelvin Connection
In some single-output applications, one amplifier can be
unused. In such cases, the unused amplifier should be
connected as a unity-gain follower (force and sense pin tied
AD588JQ
AD588JQ
2.10
1.05
together), and the input should be connected to ground.
AD588JQ
AD588JQ
AD588JQ
AD588JQ
1.40 (TYP)
1.05
3.30
3.30
10.80
7.20
An unused amplifier section can be used for other circuit
functions, as well. Figure 15 through Figure 19 show the typical
performance of A3 and A4.
Figure 13. Maximum Output Change—mV
KELVIN CONNECTIONS
Force and sense connections, also referred to as Kelvin
connections, offer a convenient method of eliminating the
100
80
60
GAIN
0
–30
–60
effects of voltage drops in circuit wires. As seen in Figure 14,
the load current and wire resistance produce an error
(V ERROR = R × I L ) at the load.
40
20
PHASE
–90
–120
The Kelvin connection of Figure 14 overcomes the problem by
including the wire resistance within the forcing loop of the
amplifier and sensing the load voltage. The amplifier corrects
0
–150
for any errors in the load voltage. In the circuit shown, the
output of the amplifier would actually be at 10 V + V ERROR , and
–20
10
100
1k
10k 100k
FREQUENCY (Hz)
1M
–180
10M
the voltage at the load would be the desired 10 V.
Rev. L | Page 11 of 20
Figure 15. Open-Loop Frequency Response (A3, A4)
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相关代理商/技术参数
AD588BD 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588BQ 功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
AD588JQ 功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:1,000 系列:- 基准类型:旁路，可调节，精度 输出电压:2.495 V ~ 36 V 容差:±0.5% 温度系数:标准值 34ppm/°C 输入电压:2.495 V ~ 36 V 通道数:1 电流 - 阴极:1mA 电流 - 静态:- 电流 - 输出:100mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:TO-243AA 供应商设备封装:SOT-89-3 包装:带卷 (TR)
AD588KQ 功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
AD588SD 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588SD/883B 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588SE 制造商:Rochester Electronics LLC 功能描述:- Bulk
AD588SE/883B 制造商:Analog Devices 功能描述:V-Ref Programmable ±5V/±10V 20-Pin LCC Tube