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| 型号： | ADR121AUJZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.5V TSOT-6 |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1 |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.5V |
| 容差： | ±0.24% |
| 温度系数： | 25ppm/°C |
| 输入电压： | 2.8 V ~ 18 V |
| 通道数： | 1 |
| 电流 - 静态： | 95µA |
| 电流 - 输出： | 5mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 供应商设备封装： | TSOT-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 795 (CN2011-ZH PDF) |
| 其它名称： | ADR121AUJZ-REEL7DKR |
ADR121/ADR125/ADR127
APPLICATIONS INFORMATION
BASIC VOLTAGE REFERENCE CONNECTION
Table 6. Required Outputs
The circuit in Figure 49 illustrates the basic configuration for
the ADR12x family voltage reference.
U1/U2
ADR127/ADR121
ADR127/ADR125
V OUT2
1.25 V
1.25 V
V OUT1
3.75 V
6.25 V
1
NC
NC 6
ADR121/ADR125
2.5 V
7.5 V
2
ADR12x
GND NC 5
NEGATIVE PRECISION REFERENCE WITHOUT
PRECISION RESISTORS
INPUT
3
V IN
V OUT 4
OUTPUT
A negative reference is easily generated by adding an op
+
0.1μF
+
0.1μF
amp, for example, the AD8603, and is configured as shown in
reference can be taken directly from the output of the op amp.
Figure 49. Basic Configuration for the ADR12x Family
STACKING REFERENCE ICs FOR ARBITRARY
The op amp must be dual-supply, low offset, and rail-to-rail if
the negative supply voltage is close to the reference output.
OUTPUTS
1 NC
NC 6
Some applications may require two reference voltage sources
ADR127
shows how this stacked output reference can be implemented.
+V DD
2 GND
3 V IN
NC 5
V OUT 4
1
NC
NC 6
–
V IN
0.1μF
2
3
ADR12x
GND NC 5
V IN V OUT 4
U2
V OUT2
0.1μF
–V REF
2
V+
AD8603
V– + 3
0.1μF
1 k ?
–V DD
Figure 51. Negative Reference
1
NC NC 6
ADR12x
GENERAL-PURPOSE CURRENT SOURCE
2
GND
NC 5
In low power applications, the need can arise for a precision
0.1μF
3
V IN
U1
V OUT 4
V OUT1
0.1μF
current source that can operate on low supply voltages. The
ADR12x can be configured as a precision current source (see
Figure 52). The circuit configuration shown is a floating current
source with a grounded load. The reference’s output voltage is
bootstrapped across R SET , which sets the output current into the
load. With this configuration, circuit precision is maintained for
Figure 50. Stacking References with the ADR12x
Two reference ICs are used and fed from an unregulated input,
V IN . The outputs of the individual ICs are connected in series,
load currents ranging from the reference’s supply current, typi-
cally 85 μA, to approximately 5 mA.
which provides two output voltages, V OUT1 and V OUT2 . V OUT1 is
the terminal voltage of U1, whereas V OUT2 is the sum of this
voltage and the terminal of U2. U1 and U2 are chosen for the
1
2
NC NC 6
ADR12x
GND NC 5
two voltages that supply the required outputs (see Table 6). For
example, if U1 and U2 are ADR127s and V IN ≥ 3.95 V, V OUT1 is
1.25 V and V OUT2 is 2.5 V.
+V DD
3
V IN
I SY
V OUT 4
R SET
I SET
P1
R L
Figure 52. ADR12x Trim Configuration
Rev. B | Page 17 of 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADR121AUJZ-REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision, Micropower LDO Voltage References in TSOT |
| ADR121BUJZ | 制造商:Analog Device 功能描述:Factory Reel Voltage Ref IC |
| ADR121BUJZ-REEL7 | 功能描述:IC VREF SERIES PREC 2.5V TSOT-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:1 系列:- 基准类型:串联，精度 输出电压:4.5V 容差:±800µV 温度系数:1ppm/°C 输入电压:13.5 V ~ 22 V 通道数:1 电流 - 阴极:- 电流 - 静态:7mA 电流 - 输出:10mA 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:20-LCC 供应商设备封装:20-CLCC 包装:管件 |
| ADR121BUJZ-REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision, Micropower LDO Voltage References in TSOT |
| ADR125 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision, Micropower LDO Voltage References in TSOT |
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