Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SC 70 5

SENSOR

ADC

PRESSURE

EMI HARDENED

INTERFERING

RF SOURCES

NO RF RELATED

DISTURBANCES

LMV861, LMV862

www.ti.com

SNOSAZ5C –FEBRUARY 2008–REVISED MARCH 2013

LMV861/LMV862 30 MHz Low Power CMOS, EMI Hardened Operational Amplifiers

Check for Samples: LMV861, LMV862

FEATURES

DESCRIPTION

TI’s LMV861 and LMV862 are CMOS input, low

Unless Otherwise Noted, Typical Values at T

power op amp IC's, providing a low input bias current,

= 25°C, V

= 3.3V

a wide temperature range of −40°C to +125°C and

• Supply Voltage 2.7V to 5.5V

exceptional performance making them robust general

• Supply Current (per Channel) 2.25 mA

purpose parts. Additionally, the LMV861 and LMV862

are EMI hardened to minimize any interference so

• Input Offset Voltage 1 mV Max

they are ideal for EMI sensitive applications.

• Input Bias Current 0.1 pA

The unity gain stable LMV861 and LMV862 feature

• GBW 30 MHz

30 MHz of bandwidth while consuming only 2.25 mA

• EMIRR at 1.8 GHz 105 dB

of current per channel. These parts also maintain

• Input Noise Voltage at 1 kHz 8 nV/√Hz

stability for capacitive loads as large as 200 pF. The

LMV861 and LMV862 provide superior performance

• Slew Rate 18 V/µs

and economy in terms of power and space usage.

• Output Voltage Swing Rail-to-Rail

This family of parts has a maximum input offset

• Output Current Drive 67 mA

voltage of 1 mV, a rail-to-rail output stage and an

• Operating Ambient Temperature Range −40°C

input common-mode voltage range that includes

to 125°C

ground. Over an operating range from 2.7V to 5.5V

the LMV861 and LMV862 provide a PSRR of 93 dB,

APPLICATIONS

and a CMRR of 93 dB. The LMV861 is offered in the

space saving 5-Pin SC70 package, and the LMV862

• Photodiode Preamp

in the 8-Pin VSSOP.

• Weight Scale Systems

• Filters/Buffers

• Medical Diagnosis Equipment

Typical Application

Figure 1. EMI Hardened Sensor Application

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 (28 pages)

PAGE 1
LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 LMV861/LMV862 30 MHz Low Power CMOS, EMI Hardened Operational Amplifiers Check for Samples: LMV861, LMV862 FEATURES DESCRIPTION 1 Unless Otherwise Noted, Typical Values at TA = 25°C, V+ = 3.3V 2 • • • • • • • • • • • Supply Voltage 2.7V to 5.5V Supply Current (per Channel) 2.25 mA Input Offset Voltage 1 mV Max Input Bias Current 0.1 pA GBW 30 MHz EMIRR at 1.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – 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) Human Body Model ESD Tolerance (3) 2 kV Charge-Device Model 1 kV Machine Model 200V VIN Differential ± Supply Voltage Supply Voltage (VS = V+ – V−) 6V Voltage at Input/Output Pins V+ +0.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 3.3V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = 3.3V, V− = 0V, VCM = V+/2, and RL =10 kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Min (2) Typ (3) 0.2V ≤ VCM ≤ V - 1.2V 77 75 93 77 76 93 Parameter Conditions (4) + CMRR Common-Mode Rejection Ratio PSRR Power Supply Rejection Ratio (4) 2.7V ≤ V+ ≤ 5.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com 3.3V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = 3.3V, V− = 0V, VCM = V+/2, and RL =10 kΩ to V+/2. Boldface limits apply at the temperature extremes.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 5V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are ensured for T = 25°C, V+ = 5V, V− = 0V, VCM = V+/2, and RL =10 kΩ to V+/2. Boldface limits apply at the temperature extremes.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics At TA = 25°C. RL = 10 kΩ, V+ = 3.3V, V− = 0V, unless otherwise specified. VOS vs. VCM at V+ = 3.3V VOS vs. VCM at V+ = 5.0V 0.3 0.3 -40°C 0.2 0.1 25°C 0 -0.1 -0.2 25°C 0 -0.1 -0.2 85°C 125°C -40°C 0.1 VOS (mV) VOS (mV) 0.2 -0.3 85°C 125°C -0.3 + + V = 5.0V V = 3.3V -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 -0.5 0.5 1.5 Figure 4. 3.5 VOS vs. Supply Voltage VOS vs.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) At TA = 25°C. RL = 10 kΩ, V = 3.3V, V− = 0V, unless otherwise specified. + Input Bias Current vs. VCM at 85°C Input Bias Current vs. VCM at 125°C TA = 125°C 50 40 30 20 10 0 -10 -20 -30 -40 -50 IBIAS (pA) IBIAS (pA) TA = 85°C 5.0V 3.3V 500 400 300 200 100 0 -100 -200 -300 -400 -500 5.0V 3.3V -1 0 1 2 3 VCM (V) 4 5 6 -1 1 2 3 4 5 6 VCM (V) Figure 10. Figure 11.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) At TA = 25°C. RL = 10 kΩ, V = 3.3V, V− = 0V, unless otherwise specified. + Sinking Current vs. Supply Voltage Sourcing Current vs. Supply Voltage 250 250 200 200 ISOURCE (mA) ISINK (mA) -40°C 25°C 150 100 85°C 125°C 25°C 100 85°C 50 50 0 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 -40°C 150 6.0 2.5 3.0 4.0 4.5 6.0 Figure 17. Output Swing High vs.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) At TA = 25°C. RL = 10 kΩ, V = 3.3V, V− = 0V, unless otherwise specified. + Output Voltage Swing vs. Load Current at V+ = 3.3V Output Voltage Swing vs. Load Current at V+ = 5.0V SINK 125°C 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 VOUT FROM RAIL (V) + -40°C V = 3.3V 125°C 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) At TA = 25°C. RL = 10 kΩ, V = 3.3V, V− = 0V, unless otherwise specified. + CMRR vs. Frequency 80 DC CMRR 60 40 20 CHANNEL SEPARATION (dB) AC CMRR 100 CMRR (dB) Channel Separation vs. Frequency 160 140 120 100 80 60 + + V = 3.3V, 5.0V V = 3.3V, 5.0V 100 1k 10k 100k FREQUENCY (Hz) 1M 10M 1k 100k 1M 10M FREQUENCY (Hz) Figure 29.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) At TA = 25°C. RL = 10 kΩ, V = 3.3V, V− = 0V, unless otherwise specified. + Slew Rate vs. Supply Voltage Input Voltage Noise vs. Frequency 30 100 28 FALLING EDGE 24 NOISE (nV/ Hz) SLEWRATE (V/µs) 26 22 20 18 16 10 RISING EDGE 14 12 AV = +1 CL = 5 pF 10 2.5 3.0 3.5 1 V+ = 3.3V, 5.0V 4.0 4.5 5.0 5.5 6.0 10 100 100k Figure 34. Figure 35. THD+N vs.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) At TA = 25°C. RL = 10 kΩ, V = 3.3V, V− = 0V, unless otherwise specified. + EMIRR IN+ vs. Power at 1800 MHz 120 110 110 100 100 90 EMIRR V_PEAK (dB) EMIRR V_PEAK (dB) EMIRR IN+ vs.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 APPLICATION INFORMATION INTRODUCTION The LMV861 and LMV862 are operational amplifiers with excellent specifications, such as low offset, low noise and a rail-to-rail output. These specifications make the LMV861 and LMV862 great choices for medical and instrumentation applications such as diagnosis equipment and power line monitors. The low supply current is perfect for battery powered equipment.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com One artifact from this test circuit is that the low frequency CMRR results appear higher than expected. This is because in the AC CMRR test circuit the potentiometer is used to compensate for the DC mismatches. So, mainly AC mismatch is all that remains. Therefore, the obtained DC CMRR from this AC CMRR test circuit tends to be higher than the actual DC CMRR based on DC measurements.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 When increasing the closed-loop gain the capacitive load can be increased even further. With a closed loop gain of 2 and a 27Ω isolation resistor, the load can be 1 nF EMIRR With the increase of RF transmitting devices in the world, the electromagnetic interference (EMI) between those devices and other equipment becomes a bigger challenge.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com Coupling an RF Signal to the IN+ Pin Each of the op amp pins can be tested separately on EMIRR. In this section the measurements on the IN+ pin (which, based on symmetry considerations, also apply to the IN- pin) are discussed. In Application Note AN-1698 the other pins of the op amp are treated as well. For testing the IN+ pin the op amp is connected in the unity gain configuration.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 VOUT (0.5V/DIV) www.ti.com Typical Opamp LMV862 TIME (0.5s/DIV) Figure 49. Comparing EMI Robustness The difference between the two types of op amps is clearly visible. The typical standard dual op amp has an output shift (disturbed signal) larger than 1V as a result of the RF signal transmitted by the cell phone. The LMV862, EMI hardened op amp does not show any significant disturbances.
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LMV861, LMV862 SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 www.ti.com Load Cell Characteristics The load cell used in this example is a Wheatstone bridge. The value of the resistors in the bridge changes when pressure is applied to the sensor. This change of the resistor values will result in a differential output voltage depending on the sensitivity of the sensor, the used supply voltage and the applied pressure.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 VDD R5 5 k: VDD A1 - LOAD CELL + R3 5 k: R1 100: VDD LMV861 - + A4 ADC LMV861 VSENSE A2 - + R2 100: VOUT LMV861 + R4 5 k: VDD R6 80 k: P1 20 k: A3 - VREF LMV861 + R6 80 k: Figure 51. Load Cell Application IR PHOTODIODE APPLICATION The LMV861 and LMV862 are also very good choices to be used in photodiode applications, such as IR communication, monitoring, etc.
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LMV861, LMV862 www.ti.com 1 V/DIV SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 20 µs/DIV Figure 52. IR Photodiode Signal R1 100 k: R2 330: R5 1 M: VDD C1 1 nF - + LMV861 + IR Photodiode VDD VOUT LMV861 ADC VEE VEE R4 100: VEE R3 100 k: Figure 53.
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LMV861, LMV862 www.ti.com SNOSAZ5C – FEBRUARY 2008 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 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 11-Apr-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMV861MG/NOPB SC70 DCK 5 LMV861MGE/NOPB SC70 DCK LMV861MGX/NOPB SC70 DCK LMV862MM/NOPB VSSOP LMV862MMX/NOPB VSSOP SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 5 250 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 5 3000 178.0 8.4 2.25 2.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMV861MG/NOPB SC70 DCK 5 1000 210.0 185.0 35.0 LMV861MGE/NOPB SC70 DCK 5 250 210.0 185.0 35.0 LMV861MGX/NOPB SC70 DCK 5 3000 210.0 185.0 35.0 LMV862MM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LMV862MMX/NOPB VSSOP DGK 8 3500 367.0 367.0 35.
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