|
|
PDF LM4125 Data sheet ( Hoja de datos )
| Número de pieza | LM4125 | |
| Descripción | Precision Micropower Low Dropout Voltage Reference | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM4125 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
November 2003
LM4125
Precision Micropower Low Dropout Voltage Reference
General Description
The LM4125 is a precision low power low dropout bandgap
voltage reference with up to 5 mA output current source and
sink capability.
This series reference operates with input voltages as low as
2V and up to 6V consuming 160 µA (Typ.) supply current. In
power down mode, device current drops to less than 2 µA.
The LM4125 comes in two grades (A and Standard) and
three voltage options for greater flexibility. The best grade
devices (A) have an initial accuracy of 0.2%, while the stan-
dard have an initial accuracy of 0.5%, both with a tempco of
50ppm/˚C guaranteed from −40˚C to +125˚C.
The very low dropout voltage, low supply current and power-
down capability of the LM4125 makes this product an ideal
choice for battery powered and portable applications.
The device performance is guaranteed over the industrial
temperature range (−40˚C to +85˚C), while certain specs are
guaranteed over the extended temperature range (−40˚C to
+125˚C). Please contact National for full specifications over
the extended temperature range. The LM4125 is available in
a standard 5-pin SOT-23 package.
Features
n Small SOT23-5 package
n Low dropout voltage:
120 mV Typ @ 1 mA
n High output voltage accuracy:
0.2%
n Source and Sink current output:
±5 mA
n Supply current:
160 µA Typ.
n Low Temperature Coefficient:
50 ppm/˚C
n Fixed output voltages:
2.048, 2.5,and 4.096
n Industrial temperature Range:
−40˚C to +85˚C
n (For extended temperature range, −40˚C to 125˚C,
contact National Semiconductor)
Applications
n Portable, battery powered equipment
n Instrumentation and process control
n Automotive & Industrial
n Test equipment
n Data acquisition systems
n Precision regulators
n Battery chargers
n Base stations
n Communications
n Medical equipment
Connection Diagram
20069802
Refer to the Ordering Information Table in this Data Sheet for Specific Part Number
SOT23-5 Surface Mount Package
© 2003 National Semiconductor Corporation DS200698
www.national.com
1 page  
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed
test conditions.
Note 2: Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by TJMAX (maximum
junction temperature), θJ-A (junction to ambient thermal resistance) and TA (ambient temperature). The maximum power dissipation at any temperature is: PDissMAX
= (TJMAX − TA)/θJ-A up to the value listed in the Absolute Maximum Ratings.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 4: Typical numbers are at 25˚C and represent the most likely parametric norm.
Note 5: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Averaging Outgoing Quality Level (AOQL).
Note 6: Dropout voltage is the differential voltage between VOUT and VIN at which VOUT changes ≤ 1% from VOUT at VIN = 3.3V for 2.0V, 2.5V and 5V for 4.1V. A
parasitic diode exists between input and output pins; it will conduct if VOUT is pulled to a higher voltage than VIN.
Note 7: Thermal hysteresis is defined as the change in +25˚C output voltage before and after exposing the device to temperature extremes.
Note 8: Output noise voltage is proportional to VOUT. VN for other voltage option is calculated using (VN(1.8V)/1.8) * VOUT. VN (2.5V) = (36µVPP/1.8) * 2.5 = 46µVPP.
Note 9: Long term stability is change in VREF at 25˚C measured continuously during 1000 hrs.
5 www.national.com
5 Page 
Typical Application Circuits
(Continued)
Precision Regulator with Current Limiting Circuit
20069811
Power Supply Splitter
20069820
11 www.national.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM4125.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM4120 | Precision Micropower Low Dropout Voltage Reference | National Semiconductor |
| LM4120 | Precision Micropower Low Dropout Voltage Reference (Rev. F) |  Texas Instruments |
| LM4121 | Precision Micropower Low Dropout Voltage Reference | National Semiconductor |
| LM4121 | LM4121 Precision Micropower Low Dropout Voltage Reference (Rev. C) | Texas Instruments |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |