Datasheet

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LMV841, LMV842, LMV844

www.ti.com

SNOSAT1G –OCTOBER 2006–REVISED FEBRUARY 2013

LMV841/LMV841Q/LMV842/LMV842Q/LMV844/LMV844Q CMOS Input, RRIO, Wide Supply

Range Operational Amplifiers

Check for Samples: LMV841, LMV842, LMV844

FEATURES

APPLICATIONS

• Unless otherwise noted, typical values at T

• High impedance sensor interface

25°C, V

= 5V.

• Battery powered instrumentation

• Space saving 5-Pin SC70 package

• High gain amplifiers

• Supply voltage range 2.7V to 12V

• DAC buffer

• Guaranteed at 3.3V, 5V and ±5V

• Instrumentation amplifiers

• Low supply current 1mA per channel

• Active filters

• Unity gain bandwidth 4.5MHz

DESCRIPTION

• Open loop gain 133dB

The LMV841/LMV842/LMV844 are low-voltage and

• Input offset voltage 500μV max

low-power operational amplifiers that operate with

• Input bias current 0.3pA

supply voltages ranging from 2.7V to 12V and have

• CMRR 112dB

rail-to-rail input and output capability. Their low offset

voltage, low supply current, and MOS inputs make

• Input voltage noise 20nV/√Hz

them ideal for sensor interface and battery-powered

• Temperature range −40°C to 125°C

applications.

• Rail-to-Rail input

The single LMV841 is offered in the space-saving 5-

• Rail-to-Rail output

Pin SC70 package, the dual LMV842 in the 8-Pin

• The LMV841Q, LMV842Q, and LMV844Q are

VSSOP and 8-Pin SOIC packages, and the quad

LMV844 in the 14-Pin TSSOP and 14-Pin SOIC

AEC-Q100 grade 1 qualified and are

packages. These small packages are ideal solutions

manufactured on automotive grade flow.

for area-constrained PC boards and portable

electronics.

The LMV841Q, LMV842Q, and LMV844Q incorporate

enhanced manufacturing and support processes for

the automotive market , including defect detection

methodologies.

Reliability qualification is compliant with the

requirements and temperature grades defined in the

AEC-Q100 standard.

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 (37 pages)

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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 LMV841/LMV841Q/LMV842/LMV842Q/LMV844/LMV844Q CMOS Input, RRIO, Wide Supply Range Operational Amplifiers Check for Samples: LMV841, LMV842, LMV844 FEATURES APPLICATIONS • • • • • • • 1 2 • • • • • • • • • • • • • • Unless otherwise noted, typical values at TA = 25°C, V+ = 5V. Space saving 5-Pin SC70 package Supply voltage range 2.7V to 12V Guaranteed at 3.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com Typical Applications - VIN + + Active Band-Pass Filter SENSOR RS + + - VS RS + - LOAD High Impedance Sensor Interface CMOS Input Feature High Side Current Sensing Rail-to-Rail Input and Output Feature 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.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 Operating Ratings Temperature Range (1) (2) −40°C to +125°C Supply Voltage (V – V−) + 2.7V to 12V Package Thermal Resistance [θJA (2)] 5-Pin SC70 334 °C/W 8-Pin VSSOP 205 °C/W 8-Pin SOIC 126 °C/W 14-Pin TSSOP 110 °C/W 14-Pin SOIC (1) (2) 93 °C/W Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 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 > 10MΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Typ 20 15 32 20 15 27 (2) Sourcing VO = V+/2 VIN = 100 mV Output Short Circuit Current IO Min (6) (7) + Sinking VO = V /2 VIN = −100 mV (3) 0.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = 5V, V− = 0V, VCM = V+/2, and RL > 10MΩ to V+/2. Boldface limits apply at the temperature extremes.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com ±5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = 5V, V− = –5V, VCM = 0V, and RL > 10MΩ to VCM. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min Typ 86 82 108 (2) (3) PSRR Power Supply Rejection Ratio 2.7V ≤ V+ ≤ 12V, VO = 0V CMVR Input Common-Mode Voltage Range CMRR ≥ 50 dB −5.2 RL = 2kΩ VO = −4.7V to 4.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 CONNECTION DIAGRAMS Figure 1. 5-Pin SC70 Top View Figure 2. 8-Pin SOIC and VSSOP Top View Figure 3.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. VOS vs. VCM Over Temperature at 3.3V VOS vs. VCM Over Temperature at 5.0V 200 200 VS = 3.3V 150 100 100 85°C VOS (PV) 50 VOS (PV) VS = 5.0V 150 125°C 0 -50 -100 50 125°C 0 85°C -50 25°C -100 25°C -150 -150 -40°C -200 -1 0 1 2 3 -200 -1 4 -40°C 0 1 2 3 4 VCM (V) VCM (V) Figure 4. Figure 5.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. VOS vs. Temperature DC Gain vs. VOUT 140 200 RL = 10 k: OPEN LOOP GAIN (dB) 150 VOS (PV) 100 50 0 3.3V -50 ±5V -100 5V 130 RL = 2 k: 120 110 RL = 600Ö 100 -150 -200 -50 -25 0 25 50 75 100 100 200 300 400 500 TEMPERATURE (°C) OUTPUT SWING FROM RAIL (mV) Figure 8. Figure 9.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. Input Bias Current vs. VCM Supply Current per Channel vs. Supply Voltage 200 1.4 TA = 125°C 125°C 150 SUPPLY CURRENT (mA) 1.3 IBIAS (pA) 100 50 0 5.0V -50 -100 ±5V 85°C 1.1 25°C 1.0 0.9 3.3V -150 1.2 -40°C -200 -5 -4 -3 -2 -1 0 1 2 3 4 0.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. Output Swing High vs. Supply Voltage RL = 2kΩ 135 Output Swing High vs.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. Output Voltage Swing vs. Load Current SINK Open Loop Frequency Response Over Temperature 60 85°C 125°C 130 GAIN PHASE 90 40 -40°C VS = 3.3V, 5.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. PSRR vs. Frequency CMRR vs. Frequency 120 3.3V 110 5.0V 100 3.3V ±5V PSRR (dB) +PSRR 3.3V 5.0V ±5V 60 40 20 3.3V: VCM = 1V CMRR (dB) 5.0V 80 90 ±5V 70 50 5.0V: VCM = 2.5V -PSRR ±5V: VCM = 0V 0 100 1k 3.3V : VCM = 1V 5.0V : VCM = 2.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. Small Signal Step Response with Gain = 1 50 mV/DIV 200 mV/DIV Large Signal Step Response with Gain = 10 f = 250 kHz AV = +1 f = 250 kHz AV = +10 VIN = 100 mVPP CL = 20 pF VIN = 200 mVPP CL = 20 pF 400 ns/DIV 400 ns/DIV Figure 28. Figure 29.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. Overshoot vs. CL Input Voltage Noise vs. Frequency 50 100 f = 250 kHz AV = +1 VIN = 200 mVPP NOISE (nV/íHz) OVERSHOOT (%) 40 30 ±5V 20 5.0V 50 3.3V 5.0V 20 10 3.3V ±5V 10 0 100 10 10 1000 100 1k CLOAD (pF) Figure 32. Figure 33. THD+N vs. Frequency THD+N vs.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TA = 25°C, RL = 10kΩ, VS = 5V. Unless otherwise specified. Closed Loop Output Impedance vs. Frequency 100 10 ROUT (:) 100x 1 10x 0.1 1x 0.01 0.001 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 36.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 APPLICATION INFORMATION INTRODUCTION The LMV841/LMV842/LMV844 are operational amplifiers with near-precision specifications: low noise, low temperature drift, low offset, and rail-to-rail input and output. Possible application areas include instrumentation, medical, test equipment, audio, and automotive applications.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com CAPACITIVE LOAD The LMV841/LMV842/LMV844 can be connected as non-inverting unity gain amplifiers. This configuration is the most sensitive to capacitive loading. The combination of a capacitive load placed on the output of an amplifier along with the amplifier’s output impedance creates a phase lag, which reduces the phase margin of the amplifier.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 The input referred voltage noise of the op amp is already located at the input, we can use the input referred voltage noise without further transferring. The input referred current noise needs to be converted to an input referred voltage noise. The current noise is negligibly small, as long as the equivalent resistance is not unrealistically large, so we can leave the current noise out for these examples.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com The equivalent resistance for the first example with a resistor RF of 10MΩ and a resistor RG of 100kΩ at 25°C (298 K) equals: Req = R F × RG RF + R G = 10 M: × 100 k: = 99 k: 10 M: + 100 k: (5) Now the noise of the resistors can be calculated, yielding: enr = 4kTReq = 4 × 1.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 ACTIVE FILTER The rail-to-rail input and output of the LMV841/LMV842/LMV844 and the wide supply voltage range make these amplifiers ideal to use in numerous applications. One of the typical applications is an active filter as shown in Figure 40. This example is a band-pass filter, for which the pass band is widened. This is achieved by cascading two band-pass filters, with slightly different center frequencies.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com 10 FILTER A FILTER B GAIN (dB) 0 -10 -20 -30 COMBINED FILTER -40 1k 10k 100k FREQUENCY (Hz) Figure 41. Active Filter Curve The responses of filter A and filter B are shown as the thin lines in Figure 41; the response of the combined filter is shown as the thick line.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 HIGH IMPEDANCE SENSOR INTERFACE With CMOS inputs, the LMV841/LMV842/LMV844 are particularly suited to be used as high impedance sensor interfaces. Many sensors have high source impedances that may range up to 10MΩ. The input bias current of an amplifier will load the output of the sensor, and thus cause a voltage drop across the source resistance, as shown in Figure 43.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com The K-type thermocouple has good sensitivity when compared to many other types; the sensitivity is 41 uV/°C. Lower sensitivity requires more gain and makes the application more sensitive to noise. In addition, a K-type thermocouple is not expensive, many other thermocouples consist of more expensive materials or are more difficult to produce.
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LMV841, LMV842, LMV844 www.ti.com SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 The ADC in this example also coverts the signal from the LM35 to a digital signal. Now the microprocessor can compensate the amplified thermocouple signal, for the unwanted thermocouple effect. Cold junction Temperature LM35 RF RG T Metal A Copper - RG LMV841 + Metal B Thermocouple Copper Amplified Thermocouple Output RF Cold junction Reference Figure 45.
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LMV841, LMV842, LMV844 SNOSAT1G – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com REVISION HISTORY Changes from Revision F (February 2013) to Revision G • 26 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 Orderable Device 11-Apr-2013 Status (1) LMV844QMAX/NOPB ACTIVE Package Type Package Pins Package Drawing Qty SOIC D 14 2500 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) CU SN Level-1-260C-UNLIM (4) -40 to 125 LMV844 QMA (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-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 LMV841MG/NOPB SC70 DCK 5 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LMV841MGX/NOPB SC70 DCK 5 3000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LMV841QMG/NOPB SC70 DCK 5 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMV841MG/NOPB SC70 DCK 5 1000 210.0 185.0 35.0 LMV841MGX/NOPB SC70 DCK 5 3000 210.0 185.0 35.0 LMV841QMG/NOPB SC70 DCK 5 1000 210.0 185.0 35.0 LMV841QMGX/NOPB SC70 DCK 5 3000 210.0 185.0 35.0 LMV842MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMV842MM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.
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