Datasheet

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LM614

www.ti.com

SNOSC21C –MAY 1998–REVISED MARCH 2013

LM614 Quad Operational Amplifier and Adjustable Reference

Check for Samples: LM614

FEATURES

DESCRIPTION

The LM614 consists of four op-amps and a

Op Amp

programmable voltage reference in a 16-pin package.

• Low Operating Current: 450μA

The op-amp out-performs most single-supply op-

• Wide Supply Voltage Range: 4V to 36V

amps by providing higher speed and bandwidth along

with low supply current. This device was specifically

• Wide Common-Mode Range: V

−

to (V

− 1.8V)

designed to lower cost and board space requirements

• Wide Differential Input Voltage: ±36V

in transducer, test, measurement and data acquisition

Reference

systems.

• Adjustable Output Voltage: 1.2V to 5.0V

Combining a stable voltage reference with four wide

• Initial Tolerance: ±2.0%

output swing op-amps makes the LM614 ideal for

single supply transducers, signal conditioning and

• Wide Operating Current Range: 17μA to

bridge driving where large common-mode-signals are

20mA

common. The voltage reference consists of a reliable

• Tolerant of Load Capacitance

band-gap design that maintains low dynamic output

impedance (1Ω typical), initial tolerance (2.0%), and

APPLICATIONS

the ability to be programmed from 1.2V to 5.0V via

two external resistors. The voltage reference is very

• Transducer Bridge Driver and Signal

stable even when driving large capacitive loads, as

Processing

are commonly encountered in CMOS data acquisition

• Process and Mass Flow Control Systems

systems.

• Power Supply Voltage Monitor

As a member of TI's new Super-Block™ family, the

• Buffered Voltage References for A/D's

LM614 is a space-saving monolithic alternative to a

multichip solution, offering a high level of integration

without sacrificing performance.

Connection Diagram

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.

2Super-Block is a trademark of dcl_owner.

3All other 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 (28 pages)

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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 LM614 Quad Operational Amplifier and Adjustable Reference Check for Samples: LM614 FEATURES 1 Op Amp 23 • • • • • • • • Low Operating Current: 450μA Wide Supply Voltage Range: 4V to 36V Wide Common-Mode Range: V − to (V+− 1.8V) Wide Differential Input Voltage: ±36V Reference Adjustable Output Voltage: 1.2V to 5.0V Initial Tolerance: ±2.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com 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) 36V (Max) (3) −0.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Electrical Characteristics (continued) These specifications apply for V− = GND = 0V, V+ = 5V, VCM = VOUT = 2.5V, IR = 100μA, FEEDBACK pin shorted to GND, unless otherwise specified. Limits in standard typeface are for TJ = 25°C; limits in Boldface type apply over the Operating Temperature Range.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) These specifications apply for V− = GND = 0V, V+ = 5V, VCM = VOUT = 2.5V, IR = 100μA, FEEDBACK pin shorted to GND, unless otherwise specified. Limits in standard typeface are for TJ = 25°C; limits in Boldface type apply over the Operating Temperature Range. Symbol R Parameter Resistance Conditions ΔV R(10→0.1 mA)/9.9 mA ΔV R(100→17 μA)/83 μA ΔVR AVRO ΔVR ΔV+ Typ (1) LM614I LM614C Limits (2) Units 0.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Reference) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted Reference Voltage vs Temperature on 5 Representative Units Reference Voltage Drift Figure 1. Figure 2. Accelerated Reference Voltage Drift vs. Time Reference Voltage vs. Current and Temperature Figure 3. Figure 4. Reference Voltage vs. Current and Temperature Reference Voltage vs. Reference Current Figure 5. Figure 6.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Reference) (continued) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted 6 Reference Voltage vs. Reference Current Reference AC Stability Range Figure 7. Figure 8. FEEDBACK Current vs. FEEDBACK-to-Anode Voltage FEEDBACK Current vs. FEEDBACK-to-Anode Voltage Figure 9. Figure 10. Reference Noise Voltage vs. Frequency Reference Small-Signal Resistance vs. Frequency Figure 11.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Reference) (continued) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted Reference Power-Up Time Reference Voltage with FEEDBACK Voltage Step Figure 13. Figure 14. Reference Voltage with 100∼ ∼12 μA Current Step Reference Step Response for 100 μA ∼ 10 mA Current Step Figure 15. Figure 16. Reference Voltage Change with Supply Voltage Step Figure 17.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Op Amps) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted 8 Input Common-Mode Voltage Range vs. Temperature VOS vs. Junction Temperature on 9 Representative Units Figure 18. Figure 19. Input Bias Current vs. Common-Mode Voltage Slew Rate vs. Temperature and Output Sink Current Figure 20. Figure 21. Large-Signal Step Response Output Voltage Swing vs. Temp.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Op Amps) (continued) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted Output Source Current vs. Output Voltage and Temp. Output Sink Current vs. Output Voltage and Temp. Figure 24. Figure 25. Output Swing, Large Signal Output Impedance vs. Frequency and Gain Figure 26. Figure 27. Small-Signal Pulse Response vs. Temp. Small-Signal Pulse Response vs. Load Figure 28.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Op Amps) (continued) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted 10 Op Amp Voltage Noise vs. Frequency Op Amp Current Noise vs. Frequency Figure 30. Figure 31. Small-Signal Voltage Gain vs. Frequency and Temperature Small-Signal Voltage Gain vs. Frequency and Load Figure 32. Figure 33.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Op Amps) (continued) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted Power Supply Current vs. Power Supply Voltage Positive Power Supply Voltage Rejection Ratio Figure 36. Figure 37. Negative Power Supply Voltage Rejection Ratio Input Offset Current vs. Junction Temperature Figure 38. Figure 39. Input Bias Current vs. Junction Temperature Figure 40.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Distributions 12 Average VOS Drift Industrial Temperature Range Average VOS Drift Commercial Temperature Range Figure 41. Figure 42. Average IOS Drift Industrial Temperature Range Average IOS Drift Commercial Temperature Range Figure 43. Figure 44. Voltage Reference Broad-BandNoise Distribution Op Amp Voltage Noise Distribution Figure 45. Figure 46.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Typical Performance Distributions (continued) Op Amp Current Noise Distribution Figure 47.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com APPLICATION INFORMATION VOLTAGE REFERENCE Reference Biasing The voltage reference is of a shunt regulator topology that models as a simple zener diode. With current Ir flowing in the “forward” direction there is the familiar diode transfer function. Ir flowing in the reverse direction forces the reference voltage to be developed from cathode to anode.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Capacitors in parallel with the reference are allowed. See Reference AC Stability Range typical curve for capacitance values—from 20 μA to 3 mA any capacitor value is stable. With the reference's wide stability range with resistive and capacitive loads, a wide range of RC filter values will perform noise filtering. Adjustable Reference The FEEDBACK pin allows the reference output voltage, Vro, to vary from 1.24V to 5.0V.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com Figure 53. Output Voltage has Negative Temperature Coefficient (TC) if R2 has Negative TC Figure 54. Output Voltage has Positive TC if R1 has Negative TC Figure 55. Diode in Series with R1 Causes Voltage across R1 and R2 to be Proportional to Absolute Temperature (PTAT) Connecting a resistor across Cathode-to-FEEDBACK creates a 0 TC current source, but a range of TCs may be synthesized.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 I = Vr/R1 = 1.24/R1 Figure 56. Current Source is Programmed by R1 Figure 57. Proportional-to-Absolute-Temperature Current Source Figure 58. Negative-TC Current Source Hysteresis The reference voltage depends, slightly, on the thermal history of the die. Competitive micro-power products vary—always check the data sheet for any given device. Do not assume that no specification means no hysteresis.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com OPERATIONAL AMPLIFIERS Any amp or the reference may be biased in any way with no effect on the other amps or reference, except when a substrate diode conducts (see Electrical Characteristics). One amp input may be outside the common-mode range, another amp may be operated as a comparator, another with all terminals floating with no effect on the others (tying inverting input to output and non-inverting input to V− on unused amps is preferred).
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 *10k must be low t.c. trimpot. Figure 60. Ultra Low Noise 10.00V Reference. Total output noise is typically 14μVRMS. VOUT = (R1 /Pe + 1) V REF R1, R2 should be 1% metal film Pβ should be low T.C. trim pot Figure 61. Slow Rise Time Upon Power-Up, Adjustable Transducer Bridge Driver. Rise time is approximately 1ms.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 (1) www.ti.com Set zero code voltage, then adjust 10Ω gain adjust pot for full scale. Figure 62. Transducer Data Acquisition System.
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LM614 www.ti.com SNOSC21C – MAY 1998 – REVISED MARCH 2013 Simplified Schematic Diagrams Figure 63. Op Amp Figure 64.
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LM614 SNOSC21C – MAY 1998 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 22 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device LM614IWMX/NOPB Package Package Pins Type Drawing SOIC DW 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 1000 330.0 16.4 Pack Materials-Page 1 10.9 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.7 3.2 12.0 16.
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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) LM614IWMX/NOPB SOIC DW 16 1000 367.0 367.0 38.
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