参数资料
型号: LM4040D82IDBZR
厂商: TEXAS INSTRUMENTS INC
元件分类: 基准电压源/电流源
英文描述: 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 8.192 V, PDSO3
封装: GREEN, PLASTIC, SOT-23, 3 PIN
文件页数: 21/56页
文件大小: 773K
代理商: LM4040D82IDBZR
Cathode and Load Currents
R
S
+
V
S
* VZ
(I
L
) IZ)
(1)
LM4040
IZ + IL
IL
IZ
VS
VZ
RS
LM4040
SLOS456K – JANUARY 2005 – REVISED MARCH 2008 .................................................................................................................................................. www.ti.com
In a typical shunt-regulator configuration (see Figure 9), an external resistor, RS, is connected between the
supply and the cathode of the LM4040. RS must be set properly, as it sets the total current available to supply
the load (IL) and bias the LM4040 (IZ). In all cases, IZ must stay within a specified range for proper operation of
the reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum IL
and minimum VS), RS must be small enough to supply the minimum IZ required for operation of the regulator, as
given by data-sheet parameters. At the other extreme, maximum VS and minimum IL, RS must be large enough
to limit IZ to less than its maximum-rated value of 15 mA.
RS is calculated according to Equation 1:
Figure 9. Shunt Regulator
28
Copyright 2005–2008, Texas Instruments Incorporated
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LM4040D82IDCKR 功能描述:基准电压& 基准电流 8.192-V Prec M-P Shunt 1% accuracy 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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