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参数资料
| 型号： | REF3120AIDBZRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.048 V, PDSO3 |
| 封装： | GREEN, PLASTIC, SOT-23, 3 PIN |
| 文件页数： | 14/15页 |
| 文件大小： | 453K |
| 代理商： | REF3120AIDBZRG4 |
REF3112, 3120, 3125, 3130, 3133, 3140
8
SBVS046C
www.ti.com
NOISE PERFORMANCE
Typical 0.1Hz to 10Hz voltage noise can be seen in the
Typical Characteristic Curve,
0.1 to 10Hz Voltage Noise. The
noise voltage of the REF31xx increases with output voltage
and operating temperature. Additional filtering may be used
to improve output noise levels, although care should be
taken to ensure the output impedance does not degrade the
AC performance.
LONG-TERM STABILITY
Long-term stability refers to the change of the output voltage
of a reference over a period of months or years. This effect
lessens as time progresses, as is shown by the long-term
stability curves. The typical drift value for the REF31xx is
70ppm from 0-1000 hours. This parameter is characterized
by measuring 30 units at regular intervals for a period of 1000
hours.
LOAD REGULATION
Load regulation is defined as the change in output voltage
due to changes in load current. The load regulation of the
REF31xx is measured using force and sense contacts as
pictured in Figure 4. The force and sense lines reduce the
impact of contact and trace resistance, resulting in accurate
measurement of the load regulation contributed solely by the
REF31xx. For applications requiring improved load regula-
tion, force and sense lines should be used.
Output Pin
Meter
V
OUT
+
–
Sense Line
Force Line
Load
I
L
Contact and
Trace Resistance
FIGURE 4. Accurate Load Regulation of REF31xx.
APPLICATION CIRCUITS
Negative Reference Voltage
For applications requiring a negative and positive reference
voltage, the REF31xx and OPA703 can be used to provide
a dual supply reference from a
±5V supply. Figure 5 shows
the REF3125 used to provide a
±2.5V supply reference
voltage. The low drift performance of the REF31xx
complement the low offset voltage and low drift of the
OPA703 to provide an accurate solution for split-supply
applications.
OPA703
REF3125
+5V
–5V
+5V
10k
10k
+2.5V
–2.5V
FIGURE 5. REF3125 Combined with OPA703 to Create
Positive and Negative Reference Voltages.
DATA ACQUISITION
Data acquisition systems often require stable voltage
references to maintain accuracy. The REF31xx family features
stability and a wide range of voltages suitable for most micro-
controllers and data converters. Figure 6, Figure 7, and
Figure 8 show basic data acquisition systems.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| REF3120AIDBZT | 功能描述:基准电压& 基准电流 20ppm/DegC 100uA SOT23-3 Series RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF3120AIDBZTG4 | 功能描述:基准电压& 基准电流 20ppm/DegC 100uA SOT23-3 Series RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF3120AQDBZRQ1 | 功能描述:SERIES VOLTAGE REFERENCE 制造商:texas instruments 系列:* 包装:剪切带（CT） 零件状态:在售 安装类型:表面贴装 封装/外壳:TO-236-3，SC-59，SOT-23-3 供应商器件封装:SOT-23-3 标准包装:1 |
| REF3125 | 制造商:BB 制造商全称:BB 功能描述:15ppm/C Max, 100UA, SOT23-3 SERIES VOLTAGE REFERENCE |
| REF3125AIDBZR | 功能描述:基准电压& 基准电流 20ppm/DegC 100uA SOT23-3 Series RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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