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| 型号： | ADR440ARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.048V 8SOIC |
| 标准包装： | 98 |
| 系列： | XFET® |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.048V |
| 容差： | ±0.15% |
| 温度系数： | 10ppm/°C |
| 输入电压： | 3 V ~ 18 V |
| 通道数： | 1 |
| 电流 - 静态： | 3.75mA |
| 电流 - 输出： | 10mA |
| 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 |
ADR440/ADR441/ADR443/ADR444/ADR445
Table 9. Digital Potentiometer Parts
HIGH VOLTAGE FLOATING CURRENT SOURCE
Part No.
No. of
Channels
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
No. of
Positions
64.00
256.00
256.00
256.00
256.00
256.00
256.00
1024.00
1024.00
ITF
I 2 C
SPI
I 2 C
SPI
I 2 C
I 2 C
SPI
SPI
SPI
R (kΩ)
1, 10, 50, 100
10, 50, 100
10, 100, 1M
20, 50, 200
20, 50, 100
1, 10, 50, 100
10, 50, 100
25, 250
25, 250
V DD1
(V)
5.5
5.5
5.5
15
15
5.5
5.5
5.5
5.5
Use the circuit in Figure 39 to generate a floating current source
with minimal self heating. This particular configuration can
operate on high supply voltages, determined by the breakdown
voltage of the N-channel JFET.
+V S
SST111
VISHAY
2
V IN
ADR440/
ADR441/
ADR443/
1
Can also use a negative supply.
ADR444/
ADR445
V OUT 6
Adding a negative supply to the operational amplifier allows
the user to produce a negative programmable reference
GND
4
OP90
2N3904
by connecting the reference output to the inverting terminal
of the operational amplifier. Choose feedback resistors to
minimize errors over temperature.
PROGRAMMABLE CURRENT SOURCE
It is possible to build a programmable current source using a
setup similar to the programmable voltage source, as shown in
–V S
Figure 39. Floating Current Source
PRECISION OUTPUT REGULATOR
(BOOSTED REFERENCE)
V IN
the current through the load. Varying the voltage on the gate
changes the current. This circuit does not require a dual digital
potentiometer.
2
V IN
ADR440/
ADR441/
2N7002
V CC
0.1μF
2
C IN
0.1μF
ADR443/
ADR444/
ADR445
15V
V IN
ADR440/
ADR441/
ADR443/
R SENSE
V OUT 6
GND
4
C OUT
0.1μF
–V
R L
200 ?
C L
1μF
V O
ADR444/
ADR445
V OUT 6
Figure 40. Boosted Output Reference
GND
4
0.1μF
AD5259
I LOAD
Higher current drive capability can be obtained without
sacrificing accuracy by using the circuit in Figure 40. The
operational amplifier regulates the MOSFET turn-on, forcing
V O to equal the V REF . Current is then drawn from V IN , allowing
increased current drive capability. The circuit allows a 50 mA
load; if higher current drive is required, use a larger MOSFET.
Figure 38. Programmable Current Source
For fast transient response, add a buffer at V O to aid with
capacitive loading.
Rev. E | Page 16 of 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADR440ARZ-REEL7 | 功能描述:IC VREF SERIES PREC 2.048V 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 产品培训模块:Voltage Reference Basics 标准包装:100 系列:- 基准类型:旁路，精度 输出电压:4.096V 容差:±0.075% 温度系数:50ppm/°C 输入电压:- 通道数:1 电流 - 阴极:1µA 电流 - 静态:- 电流 - 输出:10mA 工作温度:0°C ~ 70°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-SOIC 包装:管件 |
| ADR440B | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultralow Noise, LDO XFET Voltage References with Current Sink and Source |
| ADR440BR | 制造商:Analog Devices 功能描述:V-REF PRECISION 2.048V 10MA 8SOIC N - Bulk |
| ADR440BRZ | 功能描述:IC VREF SERIES PREC 2.048V 8SOIC 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 |
| ADR440BRZ-REEL7 | 功能描述:IC VREF SERIES PREC 2.048V 8SOIC 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) |
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