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LM4140

www.ti.com

SNVS053E –JUNE 2000–REVISED APRIL 2013

LM4140 High Precision Low Noise Low Dropout Voltage Reference

Check for Samples: LM4140

FEATURES

DESCRIPTION

• High Initial Accuracy: 0.1%

The LM4140 series of precision references are

• Ultra Low Noise

designed to combine high accuracy, low drift and

• Low Temperature Coefficient: 3 ppm/°C (A

noise with low power dissipation in a small package.

grade)

The LM4140 is the industry's first reference with

• Low Voltage Operation: 1.8V

output voltage options lower than the bandgap

• Low Dropout Voltage: 20 mV (typ) @ 1mA

voltage.

• Supply Current: 230 μA (typ), ≤ 1 μA Disable

The key to the advance performance of the LM4140

Mode

is the use of EEPROM registers and CMOS DACs for

temperature coefficient curvature correction and

• Enable Pin

trimming of the output voltage accuracy of the device

• Output Voltage Options: 1.024V, 1.250V,

during the final production testing.

2.048V, 2.500V, and 4.096V

The major advantage of this method is the much

• Custom Voltages from 0.5V to 4.5V

higher resolution available with DACs than is

• Temperature Range (0°C to 70°C)

available economically with most methods utilized by

other bandgap references.

APPLICATIONS SUMMARY

The low input and dropout voltage, low supply current

• Portable, Battery Powered Equipment

and output drive capability of the LM4140 makes this

• Instrumentation and Test Equipment product an ideal choice for battery powered and

portable applications.

• Automotive

The LM4140 is available in three grades (A, B, C)

• Industrial Process Control

with 0.1% initial accuracy and 3, 6 and 10 ppm/°C

• Data Acquisition Systems

temperature coefficients. For even lower Tempco,

• Medical Equipment

contact Texas Instruments.

• Precision Scales

The device performance is specified over the

• Servo Systems

temperature range (0°C to +70°C) and is available in

compact 8-pin package.

• Battery Charging

For other output voltage options from 0.5V to

4.5V, contact Texas Instruments.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (23 pages)

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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 LM4140 High Precision Low Noise Low Dropout Voltage Reference Check for Samples: LM4140 FEATURES 1 • • • 2 • • • • • • • High Initial Accuracy: 0.1% Ultra Low Noise Low Temperature Coefficient: 3 ppm/°C (A grade) Low Voltage Operation: 1.8V Low Dropout Voltage: 20 mV (typ) @ 1mA Supply Current: 230 μA (typ), ≤ 1 μA Disable Mode Enable Pin Output Voltage Options: 1.024V, 1.250V, 2.048V, 2.500V, and 4.096V Custom Voltages from 0.5V to 4.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com Typical Application COUT, Output bypass capacitor. See text for selection detail. Figure 1. Figure 2. Typical Temperature Coefficient (Sample of 5 Parts) Connection Diagram Figure 3. 8-Lead Surface Mount Package Number D0008A Top View PIN DESCRIPTIONS Vref (Pin 6): Reference Output. Capable of sourcing up to 8mA. Input (Pin 2): Positive Supply. Ground (Pins 1, 4, 7, 8): Negative Supply or Ground Connection.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) −0.3V to 5.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com LM4140 Electrical Charateristics (continued) Unless otherwise specified, VIN = 3.0V for the LM4140-1.024 and LM4140-1.250, VIN = 5.0V for all other voltage options, VEN = VIN. COUT = 1μF (1), ILOAD = 1mA, TA = TJ = 25°C. Limits with standard typeface are for TA = 25°C, and limits in boldface type apply over 0°C to 70°C temperature range.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 LM4140 Typical Performance Characteristics Unless otherwise specified, TA = 25°C, No Load, COUT = 1μF, VIN = 3.0V for LM4140-1.024 and LM4140-1.250, and 5V for all other voltage options. VIN = VEN. Power Up/Down Ground Current Enable Response Figure 4. Figure 5. * The 1μF output capacitor is actively discharged to ground. See ON/OFF OPERATION section for more details. Line Transient Response Load Transient Response Figure 6. Figure 7.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com LM4140 Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, No Load, COUT = 1μF, VIN = 3.0V for LM4140-1.024 and LM4140-1.250, and 5V for all other voltage options. VIN = VEN. Dropout Voltage vs Load Current Output Voltage Change vs Sink Current (ISINK) Note: 1.024V and 1.250V options require 1.8V supply. Figure 10. 6 Figure 11.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 LM4140 Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, No Load, COUT = 1μF, VIN = 3.0V for LM4140-1.024 and LM4140-1.250, and 5V for all other voltage options. VIN = VEN. Ground Current vs Load Current Long Term Drift Figure 16. Figure 17. Load Regulation vs Temperature Output Voltage vs Load Current Figure 18. Figure 19. Line Regulation vs Temperature IQ vs Temperature Figure 20. Figure 21.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com LM4140 Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, No Load, COUT = 1μF, VIN = 3.0V for LM4140-1.024 and LM4140-1.250, and 5V for all other voltage options. VIN = VEN. 8 Short Circuit Current vs Temperature Dropout Voltage vs Load Current (VOUT) = 2.0V Figure 22. Figure 23.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 APPLICATION HINTS INPUT CAPACITORS Although not always required, an input capacitor is recommended. A supply bypass capacitor on the input assures that the reference is working from a source with low impedance, which improves stability. A bypass capacitor can also improve transient response by providing a reservoir of stored energy that the reference can utilize in case where the load current demand suddenly increases.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com Figure 26. 10 μF ESR Range TANTALUM CAPACITORS Surface-mountable solid tantalum capacitors offer a good combination of small physical size for the capacitance value, and ESR in the range needed for by the LM4140. The results of testing the LM4140 stability with surface mount solid tantalum capacitors show good stability with values in the range of 0.1μF. However, optimum performance is achieved with a 1μF capacitor.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 However, they sometimes have an ESR values lower than the minimum required by the LM4140, and relatively large capacitance change with temperature. The manufacturer's datasheet for the capacitor should be consulted before selecting a value. Test results of LM4140 stability using multilayer ceramic capacitors show that a minimum of 0.2μF is usually needed.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com Figure 27. Typical Thermal Hysteresis The mechanical stress due to the PCB's mechanical and thermal stress can cause an output voltage shift more than the true thermal coefficient of the device. References in surface mount packages are more susceptible to these stresses because of the small amount of plastic molding which support the leads.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 Figure 28.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com Typical Application Circuits Figure 29. Boosted Output Current Figure 30. Boosted Ouput Current with Current Limiter * Low Noise Op Amp such as OP-27 Figure 31. Complimentary Outputs Figure 32. Voltage Reference with Force and Sense Output Figure 33. Precision Programmable Current Source Figure 34.
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LM4140 www.ti.com SNVS053E – JUNE 2000 – REVISED APRIL 2013 Figure 35. Strain Gauge Conditioner for 350Ω Bridge Figure 36. Figure 37.
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LM4140 SNVS053E – JUNE 2000 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision D (April 2013) to Revision E • 16 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM4140ACM-1.0 NRND SOIC D 8 95 TBD Call TI Call TI 0 to 70 4140A CM1.0 LM4140ACM-1.0/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 4140A CM1.0 LM4140ACM-1.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 1-Nov-2013 Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM4140BCMX-1.0/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 4140B CM1.0 LM4140BCMX-2.5/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 4140B CM2.5 LM4140BCMX-4.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 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 that lead 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.
PAGE 20
PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM4140ACMX-2.5/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM4140ACMX-4.1/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM4140BCMX-1.0/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM4140ACMX-2.5/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM4140ACMX-4.1/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM4140BCMX-1.0/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM4140BCMX-2.5/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM4140BCMX-4.1/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM4140CCMX-1.0/NOPB SOIC D 8 2500 367.
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