LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 LM611 Operational Amplifier and Adjustable Reference Check for Samples: LM611 FEATURES 1 OP AMP 2 • • • • • • • • • • • Low Operating Current: 300 μA (op amp) Wide Supply Voltage Range: 4V to 36V Wide Common-Mode Range: V− to (V+−1.8V) Wide Differential Input Voltage: ±36V Available in Low Cost 8-pin DIP Available in Plastic Package Rated for Military Temperature Range Operation REFERENCE Adjustable Output Voltage: 1.2V to 6.3V Tight Initial Tolerance Available: ±0.6% Wide Operating Current Range: 17 μA to 20 mA Reference Floats Above Ground Tolerant of Load Capacitance APPLICATIONS • • • • Transducer Bridge Driver Process and Mass Flow Control Systems Power Supply Voltage Monitor Buffered Voltage References for A/D's DESCRIPTION The LM611 consists of a single-supply op-amp and a programmable voltage reference in one space saving 8-pin package. The op-amp out-performs most singlesupply op-amps by providing higher speed and bandwidth along with low supply current. This device was specifically designed to lower cost and board space requirements in transducer, test, measurement and data acquisition systems. Combining a stable voltage reference with a wide output swing op-amp makes the LM611 ideal for single supply transducers, signal conditioning and bridge driving where large common-mode signals are common. The voltage reference consists of a reliable band-gap design that maintains low dynamic output impedance (1Ω typical), excellent initial tolerance (0.6%), and the ability to be programmed from 1.2V to 6.3V via two external resistors. The voltage reference is very stable even when driving large capacitive loads, as are commonly encountered in CMOS data acquisition systems. As a member of TI's Super-Block family, the LM611 is a space-saving monolithic alternative to a multichip solution, offering a high level of integration without sacrificing performance. Connection Diagrams Figure 1. Hermetic Dual-In-Line Package Figure 2. Plastic Surface Mount Narrow Package 1 2 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. All 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. Copyright © 1998–2013, Texas Instruments Incorporated LM611 SNOSC08C – 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) Voltage on Any Pins Except VR (referred to V− pin) 36V (Max) See (3) −0.3V (Min) Current through Any Input Pin and VR Pin ±20 mA Differential Input Voltage Military and Industrial ±36V Commercial ±32V −65°C≤TJ≤+150°C Storage Temperature Range Maximum Junction Temperature 150°C Thermal Resistance, Junction-to-Ambient (4) N Package 100°C/W D Package 150°C/W Soldering Information Soldering (10 seconds) N Package 260°C D Package 220°C ESD Tolerance (5) ±1 kV (1) (2) (3) (4) (5) Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device beyond its rated operating conditions. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. More accurately, it is excessive current flow, with resulting excess heating, that limits the voltages on all pins. When any pin is pulled a diode drop below V−, a parasitic NPN transistor turns ON. No latch-up will occur as long as the current through that pin remains below the Maximum Rating. Operation is undefined and unpredictable when any parasitic diode or transistor is conducting. Junction temperature may be calculated using TJ = TA + PD θJA. The given thermal resistance is worst-case for packages in sockets in still air. For packages soldered to copper-clad board with dissipation from one op amp or reference output transistor, nominal θJA is 90°C/W for the N package and 135°C/W for the D package. Human body model, 100 pF discharged through a 1.5 kΩ resistor. Operating Temperature Range −40°C≤TJ≤+85°C LM611AI, LM611I, LM611BI −55°C≤TJ≤+125°C LM611AM, LM611M 0°C≤TJ≤70°C LM611C 2 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Electrical Characteristics (1) These specifications apply for V− = GND = 0V, V+ = 5V, VCM = VOUT = 2.5V, IR = 100 μA, 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 Parameter IS Total Supply Current VS Supply Voltage Range Conditions Typical (2) LM611AM LM611AI Limits (3) LM611M LM611BI LM611I LM611C Limits (3) Units 210 221 300 320 350 370 μA max μA max 2.2 2.9 2.8 3 2.8 3 V min V min 46 43 36 36 32 32 V max V max RLOAD = ∞, 4V ≤ V+ ≤ 36V (32V for LM611C) OPERATIONAL AMPLIFIER VOS1 VOS Over Supply 4V ≤ V+ ≤ 36V (4V ≤ V+ ≤ 32V for LM611C) 1.5 2.0 3.5 6.0 5.0 7.0 mV max mV max VOS2 VOS Over VCM VCM = 0V through VCM = (V+ − 1.8V), V+ = 30V, V− = 0V 1.0 1.5 3.5 6.0 5.0 7.0 mV max mV max VOS3 ΔT Average VOS Drift See (3) IB Input Bias Current 10 11 25 30 35 40 nA max nA max IOS Input Offset Current 0.2 0.3 4 5 4 5 nA max nA max IOS1 ΔT Average Offset Drift Current RIN Input Resistance CIN Input Capacitance en μV/°C max 15 4 pA/°C Differential 1800 MΩ Common-Mode 3800 MΩ Common-Mode 5.7 pF Voltage Noise f = 100 Hz, Input Referred 74 nV/ √Hz In Current Noise f = 100 Hz, Input Referred 58 fA/√Hz CMRR Common-Mode Rejection-Ratio V+ = 30V, 0V ≤ VCM ≤ (V+ − 1.8V) CMRR = 20 log (ΔVCM/ΔVOS) 95 90 80 75 75 70 dB min dB min PSRR Power Supply Rejection-Ratio 4V ≤ V+ ≤ 30V, VCM = V+/2, PSRR = 20 log (ΔV+/ΔVOS) 110 100 80 75 75 70 dB min dB min AV Open Loop Voltage Gain RL = 10 kΩ to GND, V+ = 30V, 5V ≤ VOUT ≤ 25V 500 50 100 40 94 40 V/mV min SR Slew Rate V+ = 30V (4) 0.70 0.65 0.55 0.45 0.50 0.45 V/μs GBW Gain Bandwidth CL = 50 pF 0.80 0.50 MHz VO1 Output Voltage Swing High RL = 10 kΩ to GND V+ = 36V (32V for LM611C) V+ + − 1.4 V − 1.6 V+ + − 1.7 V − 1.9 V+ + − 1.8 V − 1.9 V min V min VO2 Output Voltage Swing Low RL = 10 kΩ to V+ V+ = 36V (32V for LM611C) V− + 0.8 V− + 0.9 V− + 0.9 V− + 1.0 V− + 0.95 V− + 1.0 V max V max IOUT Output Source Current VOUT = 2.5V, V+IN = 0V, V−IN = −0.3V 25 15 20 13 16 13 mA min mA min (1) (2) (3) (4) Military RETS 611AMX electrical test specification is available on request. The LM611AMJ/883 can also be procured as a Standard Military Drawing. Typical values in standard typeface are for TJ = 25°C; values in boldface type apply for the full operating temperature range. These values represent the most likely parametric norm. All limits are specified at room temperature (standard type face) or at operating temperature extremes (bold face type). Slew rate is measured with op amp in a voltage follower configuration. For rising slew rate, the input voltage is driven from 5V to 25V, and the output voltage transition is sampled at 10V and 20V. For falling slew rate, the input voltage is driven from 25V to 5V, and output voltage transition is sampled at 20V and 10V. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 3 LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Electrical Characteristics(1) (continued) These specifications apply for V− = GND = 0V, V+ = 5V, VCM = VOUT = 2.5V, IR = 100 μA, 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 Parameter Conditions Typical (2) LM611AM LM611AI Limits (3) LM611M LM611BI LM611I LM611C Limits (3) Units ISINK Output Sink Current VOUT = 1.6V, V+IN = 0V, V−IN = 0.3V 17 9 14 8 13 8 mA min mA min ISHORT Short Circuit Current VOUT = 0V, V+IN = 3V, V−IN = 2V, Source 30 40 50 60 50 60 mA max mA max VOUT = 5V, V+IN = 2V, V−IN = 3V, Sink 30 32 60 80 70 90 mA max mA max 1.244 1.2365 1.2515 (±0.6%) 1.2191 1.2689 (±2.0%) V min V max 10 80 150 VOLTAGE REFERENCE VR Reference Voltage See (5) ΔVR ΔTJ Average Temperature Drift See (6) ΔVR ΔTJ Hysteresis Hyst = (Vro′ − Vro)/ΔTJ (7) ΔVR ΔIR VR Change with Current VR(100 μA) − VR(17 μA) 0.05 0.1 1 1.1 1 1.1 mV max mV max VR(10 mA) − VR(100 μA) (8) 1.5 2.0 5 5.5 5 5.5 mV max mV max PPM/°C max μV/°C 3.2 R Resistance ΔVR(10→0.1 mA)/9.9 mA ΔVR(100→17 μA)/83 μA 0.2 0.6 0.56 13 0.56 13 Ω max Ω max ΔVR VRO VR Change with High VRO VR(Vro = Vr) − VR(Vro = 6.3V) (5.06V between Anode and FEEDBACK) 2.5 2.8 7 10 7 10 mV max mV max ΔVR ΔV+ VR Change with V+ Change VR(V+ = 5V) − VR(V+ = 36V) (V+ = 32V for LM611C) 0.1 0.1 1.2 1.3 1.2 1.3 mV max mV max VR(V+ = 5V) − VR(V+ = 3V) 0.01 0.01 1 1.5 1 1.5 mV max mV max ΔVR ΔVANODE VR Change with VANODE Change V+ = V+ max, ΔVR = VR (@ VANODE = V− = GND) − VR (@ VANODE = V+ − 1.0V) 0.7 3.3 1.5 3.0 1.6 3.0 mV max mV max IFB FEEDBACK Bias Current IFB; VANODE ≤ VFB ≤ 5.06V 22 29 35 40 50 55 nA max nA max en VR Noise 10 Hz to 10,000 Hz, VRO = VR 30 (5) (6) (7) (8) 4 μVRMS VR is the cathode-feedback voltage, nominally 1.244V. Average reference drift is calculated from the measurement of the reference voltage at 25°C and at the temperature extremes. The drift, in ppm/°C, is 106•ΔVR/(VR[25°C]•ΔTJ), where ΔVR is the lowest value subtracted from the highest, VR[25°C] is the value at 25°C, and ΔTJ is the temperature range. This parameter is ensured by design and sample testing. Hysteresis is the change in VR caused by a change in TJ, after the reference has been “dehysterized”. To dehysterize the reference; that is minimize the hysteresis to the typical value, its junction temperature should be cycled in the following pattern, spiraling in toward 25°C: 25°C, 85°C, −40°C, 70°C, 0°C, 25°C. Low contact resistance is required for accurate measurement. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Reference) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted Reference Voltage vs Temp on 5 Representative Units Reference Voltage Drift Figure 3. Figure 4. Accelerated Reference Voltage Drift vs Time Reference Voltage vs Current and Temperature Figure 5. Figure 6. Reference Voltage vs Current and Temperature Reference Voltage vs Reference Current Figure 7. Figure 8. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 5 LM611 SNOSC08C – 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 9. Figure 10. Feedback Current vs Feedback-to-Anode Voltage Feedback Current vs Feedback-to-Anode Voltage Figure 11. Figure 12. Reference Noise Voltage vs Frequency Reference Small-Signal Resistance vs Frequency Figure 13. Figure 14. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – 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 15. Figure 16. Reference Voltage with 100∼ ∼12 μA Current Step Reference Step Response for 100 μA ∼ 10 mA Current Step Figure 17. Figure 18. Reference Voltage Change with Supply Voltage Step Figure 19. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 7 LM611 SNOSC08C – 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 vsTemperature VOS vs Junction Temperature Figure 20. Figure 21. Input Bias Current vs Common-Mode Voltage Reference Change vs Common-Mode Voltage Figure 22. Figure 23. Large-Signal Step Response Output Voltage Swing vs Temp. and Current Figure 24. Figure 25. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – 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 Figure 26. Figure 27. Output Swing, Large Signal Output Impedance vs Frequency and Gain Figure 28. Figure 29. Small Signal Pulse Response vs Temp. Small-Signal Pulse Response vs Load Figure 30. Figure 31. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 9 LM611 SNOSC08C – 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 32. Figure 33. Small-Signal Voltage Gain vs Frequency and Temperature Small-Signal Voltage Gain vs Frequency and Load Figure 34. Figure 35. Follower Small-Signal Frequency Response Common-Mode Input Voltage Rejection Ratio Figure 36. Figure 37. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – 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 38. Figure 39. Negative Power Supply Voltage Rejection Ratio Slew Rate vs Temperature Figure 40. Figure 41. Input Offset Current vs Junction Temperature Input Bias Current vs Junction Temperature Figure 42. Figure 43. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 11 LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Distributions 12 Average VOS Drift Military Temperature Range Average VOS Drift Industrial Temperature Range Figure 44. Figure 45. Average VOS Drift Commercial Temperature Range Average IOS Drift Military Temperature Range Figure 46. Figure 47. Average IOS Drift Industrial Temperature Range Average IOS Drift Commercial Temperature Range Figure 48. Figure 49. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Distributions (continued) Voltage Reference Broad-Band Noise Distribution Op Amp Voltage Noise Distribution Figure 50. Figure 51. Op Amp Current Noise Distribution Figure 52. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 13 LM611 SNOSC08C – 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. The applied voltage to the cathode may range from a diode drop below V− to the reference voltage or to the avalanche voltage of the parallel protection diode, nominally 7V. A 6.3V reference with V+ = 3V is allowed. Figure 53. Voltages Associated with Reference (Current Source Ir is External) The reference equivalent circuit reveals how Vr is held at the constant 1.2V by feedback, and how the FEEDBACK pin passes little current. To generate the required reverse current, typically a resistor is connected from a supply voltage higher than the reference voltage. Varying that voltage, and so varying Ir, has small effect with the equivalent series resistance of less than an ohm at the higher currents. Alternatively, an active current source, such as the LM134 series, may generate Ir. Figure 54. Reference Equivalent Circuit Figure 55. 1.2V Reference 14 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Capacitors in parallel with the reference are allowed. See the Reference AC Stability Range 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 6.3V. The reference attempts to hold Vr at 1.24V. If Vr is above 1.24V, the reference will conduct current from Cathode to Anode; FEEDBACK current always remains low. If FEEDBACK is connected to Anode, then Vro = Vr = 1.24V. For higher voltages FEEDBACK is held at a constant voltage above Anode—say 3.76V for Vro = 5V. Connecting a resistor across the constant Vr generates a current I=R1/Vr flowing from Cathode into FEEDBACK node. A Thevenin equivalent 3.76V is generated from FEEDBACK to Anode with R2=3.76/I. Keep I greater than one thousand times larger than FEEDBACK bias current for <0.1% error—I≥32 μA for the military grade over the military temperature range (I≥5.5 μA for a 1% untrimmed error for a commercial part.) Figure 56. Thevenin Equivalent of Reference with 5V Output R1 = Vr/I = 1.24/32μ = 39k R2 = R1 {(Vro/Vr) − 1} = 39k {(5/1.24) − 1)} = 118k Figure 57. Resistors R1 and R2 Program Reference Output Voltage to be 5V Understanding that Vr is fixed and that voltage sources, resistors, and capacitors may be tied to the FEEDBACK pin, a range of Vr temperature coefficients may be synthesized. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 15 LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Figure 58. Output Voltage has Negative Temperature Coefficient (TC) if R2 has Negative TC Figure 59. Output Voltage has Positive TC if R1 has Negative TC Figure 60. 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. 16 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 I = Vr/R1 = 1.24/R1 Figure 61. Current Source is Programmed by R1 Figure 62. Proportional-to-AbsoluteTemperature Current Source Figure 63. 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. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 17 LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com OPERATIONAL AMPLIFIER The amp or the reference may be biased in any way with no effect on the other, except when a substrate diode conducts (see (1) under Electrical Characteristics). The amp may have inputs outside the common-mode range, may be operated as a comparator, or have all terminals floating with no effect on the reference (tying inverting input to output and non-inverting input to V− on unused amp is preferred). Choosing operating points that cause oscillation, such as driving too large a capacitive load, is best avoided. Op Amp Output Stage The op amp, like the LM124 series, has a flexible and relatively wide-swing output stage. There are simple rules to optimize output swing, reduce cross-over distortion, and optimize capacitive drive capability: 1. Output Swing: Unloaded, the 42 μA pull-down will bring the output within 300 mV of V− over the military temperature range. If more than 42 μA is required, a resistor from output to V− will help. Swing across any load may be improved slightly if the load can be tied to V+, at the cost of poorer sinking open-loop voltage gain. 2. Cross-over Distortion: The LM611 has lower cross-over distortion (a 1 VBE deadband versus 3 VBE for the LM124), and increased slew rate as shown in the Typical Performance Charactersitics curves. A resistor pullup or pull-down will force class-A operation with only the PNP or NPN output transistor conducting, eliminating cross-over distortion. 3. Capacitive Drive: Limited by the output pole caused by the output resistance driving capacitive loads, a pulldown resistor conducting 1 mA or more reduces the output stage NPN re until the output resistance is that of the current limit 25Ω. 200 pF may then be driven without oscillation. Op Amp Input Stage The lateral PNP input transistors, unlike those of most op amps, have BVEBO equal to the absolute maximum supply voltage. Also, they have no diode clamps to the positive supply nor across the inputs. These features make the inputs look like high impedances to input sources producing large differential and common-mode voltages. Typical Applications *10k must be low t.c. trim pot. Figure 64. Ultra Low Noise 10.00V Reference. Total Output Noise is Typically 14 μVRMS. Adjust the 10k pot for 10.000V. (1) 18 Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device beyond its rated operating conditions. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Figure 65. Simple Low Quiescent Drain Voltage Regulator. Total Supply Current is approximately 320 μA when VIN = 5V, and output has no load. VOUT = (R1/R2 + 1) VREF. R1, R2 should be 1% metal film. R3 should be low t.c. trim pot. Figure 66. Slow Rise-Time Upon Power-Up, Adjustable Transducer Bridge Driver. Rise-time is approximately 0.5 ms. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 19 LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Figure 67. Low Drop-Out Voltage Regulator Circuit. Drop out voltage is typically 0.2V. Figure 68. Nulling Bridge Detection System. Adjust sensitivity via 400 kΩ pot. Null offset with R1, and bridge drive with the 10k pot. 20 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Simplified Schematic Diagrams Figure 69. Op Amp Figure 70. Reference Figure 71. Bias Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 21 LM611 SNOSC08C – 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 .......................................................................................................... 21 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM611 PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-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) LM611CM/NOPB ACTIVE SOIC D 14 55 Green (RoHS & no Sb/Br) SN | CU SN Level-1-260C-UNLIM 0 to 70 LM611CM LM611CMX/NOPB ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) SN | CU SN Level-1-260C-UNLIM 0 to 70 LM611CM LM611IM/NOPB ACTIVE SOIC D 14 55 Green (RoHS & no Sb/Br) SN | CU SN Level-1-260C-UNLIM -40 to 85 LM611IM LM611IMX/NOPB ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LM611IM (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 availability information 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 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. 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 between the 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 weight in 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 continuation of 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 finish value exceeds the maximum column width. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-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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Addendum-Page 2 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 LM611CMX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.0 Q1 LM611IMX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.0 Q1 Pack Materials-Page 1 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) LM611CMX/NOPB SOIC D 14 2500 367.0 367.0 35.0 LM611IMX/NOPB SOIC D 14 2500 367.0 367.0 35.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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