LM4041 PRECISION MICROPOWER SHUNT VOLTAGE · PDF filewww .ti.com LM4041 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE SLCS146E– FEBRUARY 2005– REVISED FEBRUARY 2006 Packaged in
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NC − No internal connection* Pin 2 must be connected toANODE or left open.
* Pin 3 must be connected toANODE or left open. NC − No internal connection
FB
ANODE
CATHODE
NCCATHODE
*
DESCRIPTION/ORDERING INFORMATION
LM4041PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLCS146E–FEBRUARY 2005–REVISED FEBRUARY 2006
• Applications• 1.225-V Fixed and Adjustable Outputs – Data-Acquisition Systems
(1.225 V to 10 V) – Power Supplies and Power-Supply Monitors• Tight Output Tolerances and Low – Instrumentation and Test Equipment
Temperature Coefficient – Process Control– Max 0.1%, 100 ppm/°C – A Grade – Precision Audio– Max 0.2%, 100 ppm/°C – B Grade – Automotive Electronics– Max 0.5%, 100 ppm/°C – C Grade – Energy Management/Metering– Max 1.0%, 150 ppm/°C – D Grade – Battery-Powered Equipment
• Low Output Noise . . . 20 µVRMS (Typ)• Wide Operating Current Range . . .
45 µA (Typ) to 12 mA• Stable With All Capacitive Loads; No Output
Capacitor Required• Available in
– Industrial Temperature: –40°C to 85°C– Extended Temperature: –40°C to 125°C
The LM4041 series of shunt voltage references are versatile, easy-to-use references suitable for a wide array ofapplications. They require no external capacitors for operation and are stable with all capacitive loads.Additionally, the reference offers low dynamic impedance, low noise, and a low temperature coefficient to ensurea stable output voltage over a wide range of operating currents and temperatures. The LM4041 uses fuse andZener-zap reverse breakdown voltage trim during wafer sort to offer four output voltage tolerances, ranging from0.1% (max) for the A grade to 1% (max) for the D grade. Thus, a great deal of flexibility is offered to designers inchoosing the best cost-to-performance ratio for their applications. The LM4041 is available in a fixed (1.225 Vnominal) or an adjustable version (which requires an external resistor divider to set the output to a value between1.225 V and 10 V).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
LM4041PRECISION MICROPOWER SHUNT VOLTAGE REFERENCESLCS146E–FEBRUARY 2005–REVISED FEBRUARY 2006
Packaged in space-saving SC-70 and SOT-23-3 and requiring a minimum current of 45 µA (typ), the LM4041also is ideal for portable applications. The TO-92 package also is available for through-hole packaging needs.The LM4041xI is characterized for operation over an ambient temperature range of –40°C to 85°C. TheLM4041xQ is characterized for operation over an ambient temperature range of –40°C to 125°C.
ORDERING INFORMATION
ORDERABLE TOP-SIDETA DEVICE GRADE VZ PACKAGE (1)PART NUMBER MARKING (2)
A grade: SC-70 (DCK) Reel of 3000 LM4041A12IDCKR MK_0.1% initial Reel of 3000 LM4041A12IDBZRaccuracy SOT-23-3 (DBZ) 4MK_
Reel of 250 LM4041A12IDBZTand 1.2 V100 ppm/°C Bulk of 1000 LM4041A12ILPtemperature TO-92/TO-226 (LP) PREVIEW
Reel of 2000 LM4041A12ILPRcoefficient
Reel of 3000 LM4041BIDCKRSC-70 (DCK) MG_
Reel of 250 LM4041BIDCKT
Reel of 3000 LM4041BIDBZRADJ SOT-23-3 (DBZ) 4MG_
B grade: Reel of 250 LM4041BIDBZT0.2% initial
Bulk of 1000 LM4041BILPaccuracy TO-92/TO-226 (LP) PREVIEWand Reel of 2000 LM4041BILPR
100 ppm/°C SC-70 (DCK) Reel of 3000 LM4041B12IDCKR ML_temperature
Reel of 3000 LM4041B12IDBZRcoefficientSOT-23-3 (DBZ) 4ML_
1.2 V Reel of 250 LM4041B12IDBZT
Bulk of 1000 LM4041B12ILPTO-92/TO-226 (LP) PREVIEW
Reel of 2000 LM4041B12ILPR
Reel of 3000 LM4041CIDCKRSC-70 (DCK) MH_
Reel of 250 LM4041CIDCKT
Reel of 3000 LM4041CIDBZR–40°C to 85°C ADJ SOT-23-3 (DBZ) 4MH_
C grade: Reel of 250 LM4041CIDBZT0.5% initial
Bulk of 1000 LM4041CILPaccuracy TO-92/TO-226 (LP) PREVIEWand Reel of 2000 LM4041CILPR
100 ppm/°C SC-70 (DCK) Reel of 3000 LM4041C12IDCKR MM_temperature
Reel of 3000 LM4041C12IDBZRcoefficientSOT-23-3 (DBZ) 4MM_
1.2 V Reel of 250 LM4041C12IDBZT
Bulk of 1000 LM4041C12ILPTO-92/TO-226 (LP) PREVIEW
Reel of 2000 LM4041C12ILPR
Reel of 3000 LM4041DIDCKRSC-70 (DCK) MJ_
Reel of 250 LM4041DIDCKT
Reel of 3000 LM4041DIDBZRADJ SOT-23-3 (DBZ) 4MJ_
D grade: Reel of 250 LM4041DIDBZT1.0% initial
Bulk of 1000 LM4041DILPaccuracy TO-92/TO-226 (LP) PREVIEWand Reel of 2000 LM4041DILPR
150 ppm/°C SC-70 (DCK) Reel of 3000 LM4041D12IDCKR MN_temperature
Reel of 3000 LM4041D12IDBZRcoefficientSOT-23-3 (DBZ) 4MN_
1.2 V Reel of 250 LM4041D12IDBZT
Bulk of 1000 LM4041D12ILPTO-92/TO-226 (LP) PREVIEW
Reel of 2000 LM4041D12ILPR
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available atwww.ti.com/sc/package.
(2) DBZ/DCK: The actual top-side marking has one additional character that designates the assembly/test site.
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operatingconditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambienttemperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
MIN MAX UNIT
IZ Cathode current (1) 12 mA
VZ Reverse breakdown voltage (adjustable version) 10 V
LM4041 (I temperature) –40 85TA Free-air temperature °C
LM4041PRECISION MICROPOWER SHUNT VOLTAGE REFERENCESLCS146E–FEBRUARY 2005–REVISED FEBRUARY 2006
Figure 5. Reference Voltage vs Temperature Figure 6. Feedback Current vs Reverse (Output) Voltage(for Different Reverse Voltages) (for Different Temperatures)
Figure 7. Output Impedance vs Frequency Figure 8. Output Impedance vs Frequency
LM4041PRECISION MICROPOWER SHUNT VOLTAGE REFERENCESLCS146E–FEBRUARY 2005–REVISED FEBRUARY 2006
Figure 12. Startup Characteristics Test Circuit
Figure 13. Reverse Characteristics Test Circuit
The LM4041 does not require an output capacitor across CATHODE and ANODE for stability. However, if anoutput bypass capacitor is desired, the LM4041 is designed to be stable with all capacitive loads.
There is a parasitic Schottky diode connected between pins 2 and 3 of the SOT-23 packaged device. Thus, pin 3of the SOT-23 package must be left floating or connected to pin 2. Similarly, pin 2 of the SC-70 package alsomust be left floating or connected to pin 1.
LM4041PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLCS146E–FEBRUARY 2005–REVISED FEBRUARY 2006
The adjustable version allows VZ to be set by a user-defined resistor divider. The output voltage, VZ, is setaccording to the equation shown in Figure 14.
Figure 14. Adjustable Shunt Regulator
In a typical shunt regulator configuration (see Figure 15), an external resistor, RS, is connected between thesupply and the cathode of the LM4041. RS must be set properly, as it sets the total current available to supplythe load (IL) and bias the LM4041 (IZ). In all cases, IZ must stay within a specified range for proper operation ofthe reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum ILand minimum VS), RS must be small enough to supply the minimum IZ required for operation of the regulator, asgiven by data sheet parameters. At the other extreme, maximum VS and minimum IL, RS must be large enough tolimit IZ to less than its maximum recommended rating of 12 mA.
LM4041DIDCKR ACTIVE SC70 DCK 5 3000 Green (RoHS& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 85 MJU
LM4041DIDCKT ACTIVE SC70 DCK 5 250 Green (RoHS& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 85 MJU
LM4041DILP ACTIVE TO-92 LP 3 1000 Pb-Free(RoHS)
CU SN N / A for Pkg Type -40 to 85 NPDI
LM4041DILPR ACTIVE TO-92 LP 3 2000 Pb-Free(RoHS)
CU SN N / A for Pkg Type -40 to 85 NPDI
LM4041DILPRE3 ACTIVE TO-92 LP 3 2000 Pb-Free(RoHS)
CU SN N / A for Pkg Type -40 to 85 NPDI
LM4041DQDBZR ACTIVE SOT-23 DBZ 3 3000 Green (RoHS& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 125 (4MR3 ~ 4MRU)
LM4041DQDBZRG4 ACTIVE SOT-23 DBZ 3 3000 Green (RoHS& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 125 (4MR3 ~ 4MRU)
LM4041DQDBZT ACTIVE SOT-23 DBZ 3 250 Green (RoHS& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 125 (4MR3 ~ 4MRU)
LM4041DQDBZTG4 ACTIVE SOT-23 DBZ 3 250 Green (RoHS& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 125 (4MR3 ~ 4MRU)
(1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availabilityinformation and additional product content details.TBD: The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement thatlead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used betweenthe die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weightin homogeneous material)
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuationof the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finishvalue exceeds the maximum column width.
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