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PDF LM4041Q Data sheet ( Hoja de datos )
| Número de pieza | LM4041Q | |
| Descripción | AUTOMOTIVE GRADE 1.225V AND ADJUSTABLE PRECISION REFERENCE | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
LM4041Q
AUTOMOTIVE GRADE 1.225V AND ADJUSTABLE PRECISION REFERENCE
Description
The LM4041 is a bandgap circuit designed to achieve a precision
micro-power voltage reference of 1.225 V; it is also available in an
adjustable version. The device is available in the small outline SOT23
surface mount package which is ideal for applications where space
saving is important.
The fixed output version is available in 0.5% C grade and 1% D grade
while the adjustable is only available in D grade. Excellent
performance is maintained over the 60µA to 12mA operating current
range with a typical temperature coefficient of only 20ppm/°C. The
device has been designed to be highly tolerant of capacitive loads so
maintaining excellent stability.
This device offers a pin for pin compatible alternative to the LM4041
voltage reference in both adjustable and 1.225V output variants for
automotive applications.
The LM4041Q has been qualified to AEC-Q100 Grade 1 and is
Automotive Grade supporting PPAPs.
Pin Assignments
LM4041_QF (SOT23)
CATHODE 1
3 N/C
ANODE 2
Pin 3 must left floating or connected to pin 2.
LM4041_ADJQF….(SOT23)
REF 1
3 ANODE
CATHODE 2
Features
No output capacitor required
Output voltage tolerance
LM4041CQ:
±0.5% at +25°C
LM4041DQ:
±1.0% at +25°C
Low output noise:
10Hz to 10kHz 20µVrms
Wide operating current range: 60µA to 12mA
Extended temperature range: -40°C to +125°C
Low temperature coefficient: 100ppm/°C (max)
Green Molding in small package SOT23
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Grade
Qualified to AEC-Q100 Standards for High Reliability
PPAP Capable (Note 4)
Applications
Battery powered equipment
Precision power supplies
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally
the same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.
LM4041Q
Document number: DS37001 Rev. 1 - 2
1 of 7
www.diodes.com
March 2014
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
LM4041Q
Application Information
The LM4041Q comes in two variants:
LM4041_Q with fixed 1.225V output
LM4041DADJQ with variable output voltage.
In a conventional shunt reference (2-terminal, fixed output device) application (Figure 1), an external
series resistor (RS) is connected between the supply voltage, VS, and the LM4041Q.
RS determines the current that flows through the load (IL) and the LM4041Q (IR). Since load current and
supply voltage may vary, RS should be small enough to supply at least the minimum acceptable IR to the
LM4041Q even when the supply voltage is at its minimum and the load current is at its maximum value.
When the supply voltage is at its maximum and IL is at its minimum, RS should be large enough so that
the current flowing through the LM4041Q is less than 12 mA.
RS is determined by the supply voltage, (VS), the load and operating current, (IL and IQ), and the
LM4041Q’s reverse breakdown voltage, VR.
RS
VS
IL
VR
IR
VS
IR + IL
RS IL
IR R1
VR
R2
VO
For the adjustable device 3-terminals are used
The LM4041Q-ADJ’s output voltage can be adjusted to any value in the range of 1.24V through 10V. The
output voltage is set by the ratio of two external feedback resistors as shown in Figure 2 and the internal
reference voltage (VR).
The output voltage is found using the equation:
VO
VR
1
R2
R1
Figure 2
Printed Circuit Board Layout Considerations
LM4041Q with fixed output voltage in the SOT23 package has the die attached to pin 3, which results in an electrical contact between pin 2 and
pin 3.
Therefore, pin 3 of the SOT23 package must be left floating or connected to pin 2.
LM4041Q
Document number: DS37001 Rev. 1 - 2
5 of 7
www.diodes.com
March 2014
© Diodes Incorporated
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LM4041Q.PDF ] | |
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