参数资料
| 型号： | ADR431BR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/24页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.5V 8-SOIC |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 设计资源： | 40 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5380 (CN0007) 40 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5381 (CN0010) 32 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5382 (CN0011) 32 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5383 (CN0014) 8 to 16 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5390/1/2 (CN0029) AD5390/91/92 Channel Monitor Function (CN0030) 16 Channels of Programmable Output Span Using AD5360 (CN0131) 40 Channels of Programmable Output Span Using AD5371 (CN0149) |
| 标准包装： | 98 |
| 系列： | XFET® |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.5V |
| 容差： | ±0.04% |
| 温度系数： | 3ppm/°C |
| 输入电压： | 4.5 V ~ 18 V |
| 通道数： | 1 |
| 电流 - 静态： | 800µA |
| 电流 - 输出： | 30mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
V IN
2
R LW
V IN
V OUT
SENSE
PROGRAMMABLE CURRENT SOURCE
Together with a digital potentiometer and a Howland current
ADR43x
V OUT 6
A1
OP191
+
R LW
V OUT
FORCE
pump, the ADR435 forms the reference source for a programmable
current as
? R2 A + R 2 B
I L = ?
?
?
?
? × V
?
?
R L
GND
4
Figure 37. Advantage of Kelvin Connection
DUAL POLARITY REFERENCES
and
?
?
R1
R 2 B
?
?
W
(4)
V W =
× V REF
Dual polarity references can easily be made with an operational
amplifier and a pair of resistors. To avoid defeating the accuracy
obtained by the ADR43x, it is imperative to match the resistance
tolerance as well as the temperature coefficient of all the components.
V IN
1μF 0.1μF 2
D
2 N
where:
D is the decimal equivalent of the input code.
N is the number of bits.
(5)
V IN V OUT 6
ADR435
U1
GND TRIM 5
4
R1
10k ?
R3
5k ?
R2
10k ?
+10V
V+
OP1177
U2
V–
–10V
+5V
–5V
In addition, R1' and R2' must be equal to R1 and (R2 A + R2 B ),
respectively. In theory, R2 B can be made as small as needed to
achieve the necessary current within the A2 output current
driving capability. In this example, the OP2177 can deliver a
maximum output current of 10 mA. Because the current pump
employs both positive and negative feedback, C1 and C2
capacitors are needed to ensure that the negative feedback
prevails and, therefore, avoids oscillation. This circuit also
Figure 38. +5 V and ?5 V References Using ADR435
+2.5V
+10V
allows bidirectional current flow if the V A and V B inputs of
the digital potentiometer are supplied with the dual polarity
2
V IN
V OUT 6
C1
10pF
ADR435
U1
R1
5.6k ?
V DD
R1'
50k ?
R2'
1k ?
R2
V OUT 6
GND TRIM 5
4
5.6k ? V+
OP1177
U2
V–
–2.5V
–10V
Figure 39. +2.5 V and ?2.5 V References Using ADR435
2
V IN TRIM 5
ADR435
U1
GND
4
U2
AD5232
A
B W
V DD
V+
OP2177
A1
V–
C2
10pF
R1
50k ?
V DD
V+
OP2177
A2
V–
V SS
R2 A
1k ?
R2 B
10 ?
V SS
+
VL
–
I L
I L
Figure 40. Programmable Current Source
Rev. J | Page 19 of 24
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| ADR431BRMZ | 功能描述:IC VREF SERIES PREC 2.5V 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 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) |
| ADR431BRMZ-R7 | 功能描述:IC VREF SERIES PREC 2.5V 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 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) |
| ADR431BR-REEL7 | 功能描述:IC VREF SERIES PREC 2.5V 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:5V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:80µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:TO-236-3，SC-59，SOT-23-3 供应商设备封装:SOT-23-3 包装:带卷 (TR) 其它名称:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| ADR431BRZ | 功能描述:IC VREF SERIES PREC 2.5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:3V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:82µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-TSSOP（5 引线），SC-88A，SOT-353 供应商设备封装:SC-70-5 包装:带卷 (TR) 其它名称:296-20888-2 |
| ADR431BRZ | 制造商:Analog Devices 功能描述:REFERENCE VOLTAGE:2.5V |
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