Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
LM4030 Datasheet(PDF) 9 Page - Texas Instruments |
|
LM4030 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 20 page VREF VIN COUT RZ IBIAS ISHUNT ILOAD 4 5 LM4030 www.ti.com SNVS552B – MARCH 2008 – REVISED APRIL 2013 APPLICATION INFORMATION THEORY OF OPERATION The LM4030 is an ultra-high precision shunt voltage reference, having exceptionally high initial accuracy (0.05%) and temperature stability (10ppm/°C). The LM4030 is available with fixed voltage options of 2.5V and 4.096V. Despite the tiny SOT-23 package, the LM4030 exhibits excellent thermal hysteresis (75ppm) and long-term stability (25ppm). The LM4030 is designed to operate without an external capacitor, but any capacitor up to 10 µF may be used. The LM4030 can be powered off as little as 120 µA (max) but is capable of shunting up to 30 mA continuously. The typical application circuit for the LM4030 is shown in Figure 21. Figure 21. Typical Application Circuit COMPONENT SELECTION A resistor must be chosen to set the maximum operating current for the LM4030 (RZ in Figure 21). The value of the resistor can be calculated using the following equation: RZ = (VIN - VREF)/(IMIN_OPERATING + ILOAD_MAX) (1) RZ is chosen such that the total current flowing through RZ is greater than the maximum load current plus the minimum operating current of the reference itself. This ensures that the reference is never starved for current. Running the LM4030 at higher currents is advantageous for reducing noise. The reverse dynamic impedance of the VREF node scales inversely with the shunted current (see Figure 22) leading to higher rejection of noise emanating from the input supply and from EMI (electro-magnetic interferrence). Figure 22. Reverse Dynamic Impedance vs IOUT The LM4030 is designed to operate with or without a bypass capacitor (COUT in Figure 21) and is stable with capacitors of up to 10 μF. The use of a bypass capacitor can improve transient response and reduce broadband noise. Additionally, a bypass capacitor will counter the rising reverse dynamic impedance at higher frequencies improving noise immunity (see Figure 23). Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM4030 |
Número de pieza similar - LM4030_15 |
|
Descripción similar - LM4030_15 |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |