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LMV321AIDCKR

LMV321AIDCKR

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    SC70-5

  • 描述:

    LMV321AIDCKR

  • 数据手册
  • 价格&库存
LMV321AIDCKR 数据手册
Product Folder Order Now Technical Documents Support & Community Tools & Software LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 LMV3xxA Low-Voltage Rail-to-Rail Output Operational Amplifiers 1 Features • • • • • • • • • • 1 • Low input offset voltage: ±1 mV Rail-to-rail output Unity-gain bandwidth: 1 MHz Low broadband noise: 30 nV/√Hz Low input bias current: 10 pA Low quiescent current: 70 µA/Ch Unity-gain stable Internal RFI and EMI filter Operational at supply voltages as low as 2.5 V Easier to stabilize with higher capacitive load due to resistive open-loop output impedance Extended temperature range: –40°C to 125°C The robust design of the LMV3xxA family simplifies circuit design. The op amps feature unity-gain stability, an integrated RFI and EMI rejection filter, and no-phase reversal in overdrive conditions. The LMV3xxA family is available in industry-standard packages such as SOIC, MSOP, SOT-23, and TSSOP packages. Device Information(1) PART NUMBER PACKAGE LMV321A LMV358A 2 Applications • • • • • • • • • • • • • Smoke detectors Motion detectors Wearable devices Large and small appliances EPOS Barcode scanners Sensor signal conditioning Power modules Personal electronics Active filters HVAC: heating, ventilating, and air conditioning Motor control: AC induction Low-side current sensing LMV324A BODY SIZE (NOM) SOT-23 (5) 1.60 mm × 2.90 mm SC70 (5) 1.25 mm × 2.00 mm SOIC (8) 3.91 mm × 4.90 mm TSSOP (8) 3.00 mm × 4.40 mm SOT-23 (8) 1.60 mm × 2.90 mm VSSOP (8) 3.00 mm × 3.00 mm SOIC (14) 8.65 mm × 3.91 mm TSSOP (14) 4.40 mm × 5.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Single-Pole, Low-Pass Filter RG RF R1 VOUT VIN C1 f-3 dB = ( RF VOUT = 1+ RG VIN (( 1 1 + sR1C1 1 2pR1C1 ( 3 Description The LMV3xxA family includes single - (LMV321A), dual - (LMV358A), and quad-channel (LMV324A) lowvoltage (2.5 V to 5.5 V) operational amplifiers (op amps) with rail-to-rail output swing capabilities. These op amps provide a cost-effective solution for spaceconstrained applications such as large appliances, smoke detectors, and personal electronics where lowvoltage operation and high capacitive-load drive are required. The capacitive-load drive of the LMV3xxA family is 500 pF, and the resistive open-loop output impedance makes stabilization easier with much higher capacitive loads. These op amps are designed specifically for low-voltage operation (2.5 V to 5.5 V) with performance specifications similar to the LMV3xx devices. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 4 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6 6 6 7 7 7 8 9 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information: LMV321A ................................ Thermal Information: LMV358A ................................ Thermal Information: LMV324A ................................ Electrical Characteristics........................................... Typical Characteristics .............................................. Detailed Description ............................................ 15 7.1 Overview ................................................................. 15 7.2 Functional Block Diagram ....................................... 15 7.3 Feature Description................................................. 16 7.4 Device Functional Modes........................................ 16 8 Application and Implementation ........................ 17 8.1 Application Information............................................ 17 8.2 Typical Application .................................................. 17 9 Power Supply Recommendations...................... 22 9.1 Input and ESD Protection ....................................... 22 10 Layout................................................................... 23 10.1 Layout Guidelines ................................................. 23 10.2 Layout Example .................................................... 23 11 Device and Documentation Support ................. 24 11.1 11.2 11.3 11.4 11.5 11.6 11.7 Documentation Support ........................................ Related Links ........................................................ Receiving Notification of Documentation Updates Support Resources ............................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 24 24 24 24 24 24 24 12 Mechanical, Packaging, and Orderable Information ........................................................... 24 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision E (September 2019) to Revision F • Page Added SOT-23 (U) package information to Pin Configuration and Functions section ........................................................... 4 Changes from Revision D (November 2018) to Revision E Page • Added SOT-23 (8) package to Device Information ................................................................................................................ 1 • Added SOT-23 (8) (DDF) package to the Pin Configuration and Functions section.............................................................. 4 • Added DDF (SOT-23) package to Thermal Information: LMV358A ....................................................................................... 7 Changes from Revision C (August 2018) to Revision D Page • Changed the document status From: Production Data/Mixed To: Production Data .............................................................. 1 • Changed LMV321A SOT-23 and SC70 packages From: Preview To: Production ................................................................ 1 • Changed LMV324A SOIC and TSSOP packages From: Preview To: Production................................................................. 1 • Deleted DBV (SOT-23) and DCK (SC70) package preview note from the LM321A Thermal Information table .................. 7 • Deleted D (SOIC) and PW (TSSOP) package preview note from the LM324A Thermal Information table .......................... 7 Changes from Revision B (June 2018) to Revision C Page • Changed Typical Iq feature from 80 µA/Ch to 70 µA/Ch........................................................................................................ 1 • Changed typical Iq from 80 µA to 70 µA ............................................................................................................................... 8 2 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 Changes from Revision A (May 2018) to Revision B Page • Added SOT-23 package to Device Information table ............................................................................................................ 1 • Added SC70 package to Device Information table ............................................................................................................... 1 • Added TSSOP-8 package to Device Information table ......................................................................................................... 1 • Added SOIC-14 package to Device Information table .......................................................................................................... 1 • Added TSSOP-14 package to Device Information table ....................................................................................................... 1 • Added Thermal Information: LMV321A .................................................................................................................................. 7 • Added Thermal Information: LMV324A ................................................................................................................................. 7 Changes from Original (December 2017) to Revision A Page • Changed device status from Advance Information to Production Data/Mixed Status............................................................ 1 • Added DGK and PW package to the LMV358A Thermal Information table .......................................................................... 7 Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 3 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com 5 Pin Configuration and Functions LMV321A DBV Package 5-Pin SOT-23 Top View OUT 1 V- 2 +IN 3 5 4 LMV321A DCK, LMV321AU DBV Package 5-Pin SC70, SOT-23 Top View V+ +IN 1 V- 2 -IN 3 -IN 5 V+ 4 OUT Pin Functions: LMV321A PIN NAME I/O DESCRIPTION DBV DCK, DBV (U) –IN 4 3 I Inverting input +IN 3 1 I Noninverting input OUT 1 4 O Output V– 2 2 — Negative (lowest) supply or ground (for single-supply operation) V+ 5 5 — Positive (highest) supply LMV358A D, DDF, DGK, PW Packages 8-Pin SOIC, VSSOP, TSSOP Top View OUT A 1 8 V+ -IN A 2 7 OUT B +IN A 3 6 -IN B V- 4 5 +IN B Pin Functions: LMV358A PIN I/O DESCRIPTION NAME NO. –IN A 2 I Inverting input, channel A +IN A 3 I Noninverting input, channel A –IN B 6 I Inverting input, channel B +IN B 5 I Noninverting input, channel B OUT A 1 O Output, channel A OUT B 7 O Output, channel B V– 4 — Negative (lowest) supply or ground (for single-supply operation) V+ 8 — Positive (highest) supply 4 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 LMV324A D, PW Packages 14-Pin SOIC, TSSOP Top View 14 OUT D 13 -IN D 3 12 +IN D V+ 4 11 V- +IN B 5 10 +IN C -IN B 6 9 -IN C OUT B 7 8 OUT C OUT A 1 -IN A 2 +IN A A B D C Pin Functions: LMV324A PIN I/O DESCRIPTION NAME NO. –IN A 2 I Inverting input, channel A +IN A 3 I Noninverting input, channel A –IN B 6 I Inverting input, channel B +IN B 5 I Noninverting input, channel B –IN C 9 I Inverting input, channel C +IN C 10 I Noninverting input, channel C –IN D 13 I Inverting input, channel D +IN D 12 I Noninverting input, channel D OUT A 1 O Output, channel A OUT B 7 O Output, channel B OUT C 8 O Output, channel C OUT D 14 O Output, channel D V– 11 — Negative (lowest) supply or ground (for single-supply operation) V+ 4 — Positive (highest) supply Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 5 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating temperature range (unless otherwise noted) (1) Supply voltage, ([V+] – [V–]) Common-mode Voltage (2) Signal input pins MIN MAX UNIT 0 6 V (V+) + 0.5 V (V–) – 0.5 Differential Current (2) (V+) – (V–) + 0.2 V 10 mA –10 Output short-circuit (3) Continuous Operating, TA –55 Operating junction temperature, TJ Storage temperature, Tstg (1) (2) (3) –65 150 °C 150 °C 150 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Input pins are diode-clamped to the power-supply rails. Input signals that may swing more than 0.5 V beyond the supply rails must be current limited to 10 mA or less. Short-circuit to ground, one amplifier per package. 6.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±2000 Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) ±1000 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating temperature range (unless otherwise noted) MIN MAX VS Supply voltage 2.5 5.5 V TA Specified temperature –40 125 °C 6 Submit Documentation Feedback UNIT Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 6.4 Thermal Information: LMV321A LMV321A THERMAL METRIC (1) DBV (SOT-23) DCK (SC70) 5 PINS 5 PINS UNIT RθJA Junction-to-ambient thermal resistance 232.8 239.6 °C/W RθJC(top) Junction-to-case (top) thermal resistance 153.8 148.5 °C/W RθJB Junction-to-board thermal resistance 100.9 82.3 °C/W ψJT Junction-to-top characterization parameter 77.2 54.5 °C/W ψJB Junction-to-board characterization parameter 100.4 81.8 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance N/A N/A °C/W (1) For more information about traditional and new thermal metrics, see Semiconductor and IC Package Thermal Metrics. 6.5 Thermal Information: LMV358A LMV358A THERMAL METRIC (1) D (SOIC) DGK (VSSOP) PW (TSSOP) DDF (SOT-23) 8 PINS 8 PINS 8 PINS 8 PINS 147.4 201.2 205.8 183.7 °C/W RθJC(top) Junction-to-case (top) thermal resistance 94.3 85.7 106.7 112.5 °C/W RθJB Junction-to-board thermal resistance 89.5 122.9 133.9 98.2 °C/W ψJT Junction-to-top characterization parameter 47.3 21.2 34.4 18.8 °C/W ψJB Junction-to-board characterization parameter 89 121.4 132.6 97.6 °C/W RθJA (1) Junction-to-ambient thermal resistance UNIT For more information about traditional and new thermal metrics, see Semiconductor and IC Package Thermal Metrics. 6.6 Thermal Information: LMV324A LMV324A THERMAL METRIC (1) D (SOIC) PW (TSSOP) 14 PINS 8 PINS UNIT RθJA Junction-to-ambient thermal resistance 102.1 148.3 °C/W RθJC(top) Junction-to-case (top) thermal resistance 56.8 68.1 °C/W RθJB Junction-to-board thermal resistance 58.5 92.7 °C/W ψJT Junction-to-top characterization parameter 20.5 16.9 °C/W ψJB Junction-to-board characterization parameter 58.1 91.8 °C/W (1) For more information about traditional and new thermal metrics, see Semiconductor and IC Package Thermal Metrics. Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 7 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com 6.7 Electrical Characteristics For VS = (V+) – (V–) = 2.5 V to 5.5 V (±0.9 V to ±2.75 V), TA = 25°C, RL = 10 kΩ connected to VS / 2, and VCM = VOUT = VS / 2 (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX ±1 ±4 UNIT OFFSET VOLTAGE Vs = 5 V VOS Input offset voltage mV dVOS/dT VOS vs temperature TA = –40°C to 125°C PSRR Power-supply rejection ratio VS = 2.5 to 5.5 V, VCM = (V–) Vs = 5 V, TA = –40°C to 125°C ±5 78 ±1 µV/°C 100 dB INPUT VOLTAGE RANGE VCM CMRR Common-mode voltage range Common-mode rejection ratio No phase reversal, rail-to-rail input (V–) – 0.1 (V+) – 1 VS = 2.5 V, (V–) – 0.1 V < VCM < (V+) – 1.4 V TA = –40°C to 125°C 86 VS = 5.5 V, (V–) – 0.1 V < VCM < (V+) – 1.4 V TA = –40°C to 125°C 95 V dB VS = 5.5 V, (V–) – 0.1 V < VCM < (V+) + 0.1 V TA = –40°C to 125°C 63 VS = 2.5 V, (V–) – 0.1 V < VCM < (V+) + 0.1 V TA = –40°C to 125°C 77 68 INPUT BIAS CURRENT IB Input bias current IOS Input offset current Vs = 5 V ±10 pA ±3 pA ƒ = 0.1 Hz to 10 Hz, Vs = 5 V 5.1 µVPP ƒ = 1 kHz, Vs = 5 V 33 ƒ = 10 kHz, Vs = 5 V 30 ƒ = 1 kHz, Vs = 5 V 25 fA/√Hz 1.5 pF 5 pF NOISE En Input voltage noise (peak-to-peak) en Input voltage noise density in Input current noise density nV/√Hz INPUT CAPACITANCE CID Differential CIC Common-mode OPEN-LOOP GAIN VS = 5.5 V, (V–) + 0.05 V < VO < (V+) – 0.05 V, RL = 10 kΩ AOL Open-loop voltage gain 100 VS = 2.5 V, (V–) + 0.04 V < VO < (V+) – 0.04 V, RL = 10 kΩ 115 98 dB VS = 2.5 V, (V–) + 0.1 V < VO < (V+) – 0.1 V, RL = 2 kΩ 112 VS = 5.5 V, (V–) + 0.15 V < VO < (V+) – 0.15 V, RL = 2 kΩ 128 FREQUENCY RESPONSE GBW Gain-bandwidth product Vs = 5 V φm Phase margin VS = 5.5 V, G = 1 76 1 ° SR Slew rate Vs = 5 V 1.7 V/µs tS Settling time tOR Overload recovery time VS = 5 V, VIN × gain > VS THD+N Total harmonic distortion + noise VS = 5.5 V, VCM = 2.5 V, VO = 1 VRMS, G = +1, f = 1 kHz, 80-kHz measurement BW Voltage output swing from supply rails VS = 5.5 V, RL = 10 kΩ 20 50 VO VS = 5.5 V, RL = 2 kΩ 40 75 ISC Short-circuit current Vs = 5.5 V ZO Open-loop output impedance Vs = 5 V, f = 1 MHz To 0.1%, VS = 5 V, 2-V step , G = +1, CL = 100 pF 3 To 0.01%, VS = 5 V, 2-V step , G = +1, CL = 100 pF 4 MHz µs 0.9 µs 0.005% OUTPUT mV ±40 mA 1200 Ω POWER SUPPLY VS IQ Specified voltage range Quiescent current per amplifier 5.5 (±2.75) 70 150 VS = 0 V to 5 V, to 90% IQ level Submit Documentation Feedback V 125 µA IO = 0 mA, VS = 5.5 V, TA = –40°C to 125°C Power-on time 8 2.5 (±1.25) IO = 0 mA, VS = 5.5 V 50 µs Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 6.8 Typical Characteristics at TA = 25°C, V+ = 2.75 V, V– = –2.75 V, RL = 10 kΩ connected to VS / 2, VCM = VS / 2, and VOUT = VS / 2 (unless otherwise noted) 6 3.5 IB I B+ IOS 4 IB+ IOS 2 IB and IOS (pA) IB and IOS (pA) 2 0 -2 -4 1.5 1 0.5 0 -0.5 -6 -1 -1.5 -8 -10 -40 IB 3 2.5 -2 -2.5 -20 0 20 40 60 80 Temperature (qC) 100 120 140 -3 -2 -1 0 1 Common-Mode Voltage (V) D006 Figure 1. IB and IOS vs Temperature 2 3 D007 Figure 2. IB and IOS vs Common-Mode Voltage 160 140 100 120 80 100 60 80 40 60 20 40 80 60 Phase (q) 100 Gain (dB) Gain (dB) 120 40 20 0 -40 0 VS = 5.5 V VS = 2.5 V -20 0 20 40 60 80 Temperature (qC) 100 120 140 20 Gain Phase -20 1k 0 10k D008 100k Frequency (Hz) 1M D009 CL = 10 pF Figure 3. Open-Loop Gain vs Temperature Figure 4. Open-Loop Gain and Phase vs Frequency 80 160 Gain = 1 Gain = 1 Gain = 10 Gain = 100 Gain = 1000 140 60 120 50 100 40 Gain (dB) Open-Loop Voltage Gain (dB) 70 80 60 30 20 10 40 0 20 0 -3 -10 -2 -1 0 1 Output Voltage (V) 2 3 -20 100 1k D010 10k 100k Frequency (Hz) 1M D011 CL = 10 pF Figure 5. Open-Loop Gain vs Output Voltage Figure 6. Closed-Loop Gain vs Frequency Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 9 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com Typical Characteristics (continued) at TA = 25°C, V+ = 2.75 V, V– = –2.75 V, RL = 10 kΩ connected to VS / 2, VCM = VS / 2, and VOUT = VS / 2 (unless otherwise noted) 3 120 Power Supply Rejection Ratio (dB) 2.5 2 Output Voltage (V) 1.5 125°C 85°C 1 25°C -40°C 0.5 0 -0.5 -1 85°C -1.5 25°C -40°C 125°C -2 -2.5 5 10 15 20 25 30 35 Output Current (mA) 40 45 80 60 40 20 0 100 -3 0 PSRR+ PSRR 100 50 Figure 7. Output Voltage vs Output Current (Claw) 100k 1M D013 120 Common-Mode Rejection Ratio (dB) Power Supply Rejection Ratio (dB) 10k Frequency (Hz) Figure 8. PSRR vs Frequency 120 100 80 60 40 20 0 -40 1k D012 -20 0 20 40 60 80 Temperature (qC) 100 120 100 80 60 40 20 0 100 140 1k D014 10k Frequency (Hz) 100k 1M D015 VS = 1.8 V to 5.5 V Figure 9. DC PSRR vs Temperature Amplitude (1 PV/div) Figure 10. CMRR vs Frequency 2.5 V Time (1 s/div) D017 VCM = (V–) – 0.1 V to (V+) – 1.4 V Figure 11. DC CMRR vs Temperature 10 Submit Documentation Feedback Figure 12. 0.1 Hz to 10 Hz Integrated Voltage Noise Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 Typical Characteristics (continued) 120 -50 100 -60 80 THD + N (dB) Input Voltage Noise Spectral Density (nV/—Hz) at TA = 25°C, V+ = 2.75 V, V– = –2.75 V, RL = 10 kΩ connected to VS / 2, VCM = VS / 2, and VOUT = VS / 2 (unless otherwise noted) 60 40 -70 -80 -90 20 RL = 2K RL = 10K 0 10 100 1k Frequency (Hz) 10k -100 100 100k 1k Frequency (Hz) D018 10k D019 VS = 5.5 V, VCM = 2.5 V, G = 1, BW = 80 kHz, VOUT = 0.5 VRMS Figure 13. Input Voltage Noise Spectral Density Figure 14. THD + N vs Frequency 0 70 G = +1, RL = 2 k: G = +1, RL = 10 k: G = 1, RL = 2 k: G = 1, RL = 10 k: 60 Quiescent Current (PA) THD + N (dB) -20 -40 -60 50 40 30 20 -80 10 -100 0.001 0.01 0.1 Amplitude (V RMS) 1 0 1.5 2 2 2.5 D020 3 3.5 4 Voltage Supply (V) 4.5 5 5.5 D021 VS = 5.5 V, VCM = 2.5 V, f = 1 kHz, G = 1, BW = 80 kHz Figure 15. THD + N vs Amplitude Figure 16. Quiescent Current vs Supply Voltage 2000 Open-Loop Output Impedance (:) 70 Quiescent Current (PA) 60 50 40 30 20 10 0 -40 -20 0 20 40 60 80 Temperature (qC) 100 120 140 Figure 17. Quiescent Current vs Temperature 1800 1600 1400 1200 1000 800 600 400 200 0 1k 10k D022 100k Frequency (Hz) 1M 10M D023 Figure 18. Open-Loop Output Impedance vs Frequency Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 11 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com Typical Characteristics (continued) 50 50 45 45 40 40 35 35 Overshoot (%) Overshoot (%) at TA = 25°C, V+ = 2.75 V, V– = –2.75 V, RL = 10 kΩ connected to VS / 2, VCM = VS / 2, and VOUT = VS / 2 (unless otherwise noted) 30 25 20 30 25 20 15 15 10 10 Overshoot (+) Overshoot (–) 5 Overshoot (+) Overshoot (–) 5 0 0 0 200 400 600 Capacitance Load (pF) 800 1000 0 200 400 600 Capacitance Load (pF) D024 G = 1, VIN = 100 mVpp 800 1000 D025 G = –1, VIN = 100 mVpp Figure 19. Small Signal Overshoot vs Capacitive Load Figure 20. Small Signal Overshoot vs Capacitive Load 90 VOUT VIN 80 Amplitude (1 V/div) Phase Margin (q) 70 60 50 40 30 20 10 0 0 200 400 600 Capacitance Load (pF) 800 Time (100 Ps/div) 1000 D027 D026 G = 1, VIN = 6.5 VPP Figure 22. No Phase Reversal Figure 21. Phase Margin vs Capacitive Load VOUT VIN Amplitude (1 V/div) Voltage (20 mV/div) VOUT VIN Time (20 Ps/div) Time (10 Ps/div) D028 G = –10, VIN = 600 mVPP Figure 23. Overload Recovery 12 Submit Documentation Feedback D029 G = 1, VIN = 100 mVPP, CL = 10 pF Figure 24. Small-Signal Step Response Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 Typical Characteristics (continued) at TA = 25°C, V+ = 2.75 V, V– = –2.75 V, RL = 10 kΩ connected to VS / 2, VCM = VS / 2, and VOUT = VS / 2 (unless otherwise noted) Voltage (1 V/div) Output Voltage (1 mV/div) VOUT VIN Time (10 Ps/div) Time (1 μs/div) D030 D031 G = 1, VIN = 4 VPP, CL = 10 pF G = 1, CL = 100 pF, 2-V step Figure 25. Large-Signal Step Response Figure 26. Large-Signal Settling Time (Negative) 80 Short Circuit Current (mA) Output Voltage (1 mV/div) 60 40 20 0 -20 -40 -60 Sinking Sourcing -80 -40 Time (1 Ps/div) -20 0 20 40 60 Temperature (qC) D032 80 100 120 D033 G = 1, CL = 100 pF, 2-V step Figure 27. Large-Signal Settling Time (Positive) Figure 28. Short-Circuit Current vs Temperature 6 140 120 100 4 EMIRR (dB) Maximum Output Voltage (V) VS = 5.5 V 5 3 2 80 60 40 1 20 0 1 10 100 1k 10k 100k Frequency (Hz) 1M 10M 100M D034 Figure 29. Maximum Output Voltage vs Frequency 0 10M 100M 1G Frequency (Hz) 10G D035 Figure 30. Electromagnetic Interference Rejection Ratio Referred to Noninverting Input (EMIRR+) vs Frequency Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 13 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com Typical Characteristics (continued) at TA = 25°C, V+ = 2.75 V, V– = –2.75 V, RL = 10 kΩ connected to VS / 2, VCM = VS / 2, and VOUT = VS / 2 (unless otherwise noted) 0 Channel Separation (dB) -20 -40 -60 -80 -100 -120 -140 1k 10k 100k Frequency (Hz) 1M 10M D036 Figure 31. Channel Separation 14 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 7 Detailed Description 7.1 Overview The LMV3xxA is a family of low-power, rail-to-rail output op amps. These devices operate from 2.5 V to 5.5 V, are unity-gain stable, and are designed for a wide range of general-purpose applications. The input commonmode voltage range includes the negative rail and allows the LMV3xxA family to be used in many single-supply applications. Rail-to-rail output swing significantly increases dynamic range, especially in low-supply applications, and makes them suitable for driving sampling analog-to-digital converters (ADCs). 7.2 Functional Block Diagram V+ Reference Current VIN+ VINVBIAS1 Class AB Control Circuitry VO VBIAS2 V(Ground) Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 15 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com 7.3 Feature Description 7.3.1 Operating Voltage The LMV3xxA family of op amps are for operation from 2.5 V to 5.5 V. In addition, many specifications such as input offset voltage, quiescent current, offset current, and short circuit current apply from –40°C to 125°C. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics section. 7.3.2 Input Common Mode Range The input common-mode voltage range of the LMV3xxA family extends 100 mV beyond the negative supply rail and within 1 V below the positive rail for the full supply voltage range of 2.5 V to 5.5 V. This performance is achieved with a P-channel differential pair, as shown in the Functional Block Diagram. Additionally, a complementary N-channel differential pair has been included in parallel to eliminate issues with phase reversal that are common with previous generations of op amps. However, the N-channel pair is not optimized for operation. TI recommends limiting any voltages applied at the inputs to less than VCC – 1 V to ensure that the op amp conforms to the specifications detailed in the Electrical Characteristics table. 7.3.3 Rail-to-Rail Output Designed as a low-power, low-voltage operational amplifier, the LMV3xxA family delivers a robust output drive capability. A class-AB output stage with common-source transistors achieves full rail-to-rail output swing capability. For resistive loads of 10 kΩ, the output swings to within 20 mV of either supply rail, regardless of the applied power-supply voltage. Different load conditions change the ability of the amplifier to swing close to the rails. 7.3.4 Overload Recovery Overload recovery is defined as the time required for the operational amplifier output to recover from a saturated state to a linear state. The output devices of the operational amplifier enter a saturation region when the output voltage exceeds the rated operating voltage, because of the high input voltage or the high gain. After the device enters the saturation region, the charge carriers in the output devices require time to return to the linear state. After the charge carriers return to the linear state, the device begins to slew at the specified slew rate. Therefore, the propagation delay (in case of an overload condition) is the sum of the overload recovery time and the slew time. The overload recovery time for the LMV3xxA family is approximately 850 ns. 7.4 Device Functional Modes The LMV3xxA family has a single functional mode. The devices are powered on as long as the power-supply voltage is between 2.5 V (±1.25 V) and 5.5 V (±2.75 V). 16 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The LMV3xxA family of low-power, rail-to-rail output operational amplifiers is specifically designed for portable applications. The devices operate from 2.5 V to 5.5 V, are unity-gain stable, and are suitable for a wide range of general-purpose applications. The class AB output stage is capable of driving less than or equal to 10‑kΩ loads connected to any point between V+ and V–. The input common-mode voltage range includes the negative rail, and allows the LMV3xxA devices to be used in many single-supply applications. 8.2 Typical Application 8.2.1 LMV3xxA Low-Side, Current Sensing Application Figure 32 shows the LMV3xxA configured in a low-side current sensing application. VBUS ILOAD ZLOAD 5V + LMV358A RSHUNT 0.1 Ÿ VSHUNT í VOUT í + RF 57.6 NŸ RG 1.2 NŸ Figure 32. LMV3xxA in a Low-Side, Current-Sensing Application Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 17 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com Typical Application (continued) 8.2.1.1 Design Requirements The design requirements for this design are: • Load current: 0 A to 1 A • Output voltage: 4.9 V • Maximum shunt voltage: 100 mV 8.2.1.2 Detailed Design Procedure The transfer function of the circuit in is given in Equation 1. VOUT ILOAD u RSHUNT u Gain (1) The load current (ILOAD) produces a voltage drop across the shunt resistor (RSHUNT). The load current is set from 0 A to 1 A. To keep the shunt voltage below 100 mV at maximum load current, the largest shunt resistor is shown using Equation 2. VSHUNT _ MAX 100mV RSHUNT 100m: ILOAD _ MAX 1A (2) Using Equation 2, RSHUNT is calculated to be 100 mΩ. The voltage drop produced by ILOAD and RSHUNT is amplified by the LMV3xxA to produce an output voltage of approximately 0 V to 4.9 V. The gain needed by the LMV3xxA to produce the necessary output voltage is calculated using Equation 3. Gain VOUT _ MAX VIN _ MAX VOUT _ MIN VIN _ MIN (3) Using Equation 3, the required gain is calculated to be 49 V/V, which is set with resistors RF and RG. Equation 4 sizes the resistors RF and RG, to set the gain of the LMV3xxA to 49 V/V. RF Gain 1 RG (4) Selecting RF as 57.6 kΩ and RG as 1.2 kΩ provides a combination that equals 49 V/V. Figure 33 shows the measured transfer function of the circuit shown in Figure 32. Notice that the gain is only a function of the feedback and gain resistors. This gain is adjusted by varying the ratio of the resistors and the actual resistors values are determined by the impedance levels that the designer wants to establish. The impedance level determines the current drain, the effect that stray capacitance has, and a few other behaviors. There is no optimal impedance selection that works for every system, you must choose an impedance that is ideal for your system parameters. 8.2.1.3 Application Curve 5 Output (V) 4 3 2 1 0 0 0.2 0.4 0.6 0.8 ILOAD (A) 1 C219 Figure 33. Low-Side, Current-Sense Transfer Function 18 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 Typical Application (continued) 8.2.2 Single-Supply Photodiode Amplifier Photodiodes are used in many applications to convert light signals to electrical signals. The current through the photodiode is proportional to the photon energy absorbed, and is commonly in the range of a few hundred picoamps to a few tens of microamps. An amplifier in a transimpedance configuration is typically used to convert the low-level photodiode current to a voltage signal for processing in an MCU. The circuit shown in Figure 34 is an example of a single-supply photodiode amplifier circuit using the LMV358A. +3.3 V R1 11.5 NŸ CF 10 pF R2 357 Ÿ RF 309 NŸ VREF +3.3 V ± VOUT LMV358A VREF CPD 47 pF IIN 0-10 µA + RL 10 k Figure 34. Single-Supply Photodiode Amplifier Circuit Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 19 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com Typical Application (continued) 8.2.2.1 Design Requirements The design requirements for this design are: • Supply voltage: 3.3 V • Input: 0 µA to 10 µA • Output: 0.1 V to 3.2 V • Bandwidth: 50 kHz 8.2.2.2 Detailed Design Procedure The transfer function between the output voltage (VOUT), the input current, (IIN) and the reference voltage (VREF) is defined in Equation 5. VOUT IIN u RF VREF (5) Where: VREF § R u R2 · V u¨ 1 ¸ © R1 R2 ¹ (6) Set VREF to 100 mV to meet the minimum output voltage level by setting R1 and R2 to meet the required ratio calculated in Equation 7. VREF 0.1 V 0.0303 V 3.3 V (7) The closest resistor ratio to meet this ratio sets R1 to 11.5 kΩ and R2 to 357 Ω. The required feedback resistance can be calculated based on the input current and desired output voltage. VOUT VREF 3.2 V 0.1 V kV | 309 k: RF 310 IIN 10 PA A (8) Calculate the value for the feedback capacitor based on RF and the desired –3-dB bandwidth, (f–3dB) using Equation 9. 1 1 CF 10.3 pF | 10 pF 2 u S u RF u f 3dB 2 u S u 309 k: u 50 kHz (9) The minimum op amp bandwidth required for this application is based on the value of RF, CF, and the capacitance on the INx– pin of the LMV358A which is equal to the sum of the photodiode shunt capacitance, (CPD) the common-mode input capacitance, (CCM) and the differential input capacitance (CD) as Equation 10 shows. CIN CPD CCM CD 47 pF 5 pF 1 pF 53 pF (10) The minimum op amp bandwidth is calculated in Equation 11. CIN CF t 324 kHz f BGW t 2 u S u RF u CF2 (11) The 1-MHz bandwidth of the LMV3xxA meets the minimum bandwidth requirement and remains stable in this application configuration. 20 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 Typical Application (continued) 8.2.2.3 Application Curves The measured current-to-voltage transfer function for the photodiode amplifier circuit is shown in Figure 35. The measured performance of the photodiode amplifier circuit is shown in Figure 36. 3 120 2.5 Output Voltage (V) Gain (dB) 100 80 2 1.5 1 60 0.5 40 10 0 100 1k 10k Frequency (Hz) 100k 1M 0 2E-6 D001 Figure 35. Photodiode Amplifier Circuit AC Gain Results 4E-6 6E-6 Input Current (A) 8E-6 1E-5 D002 Figure 36. Photodiode Amplifier Circuit DC Results Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 21 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com 9 Power Supply Recommendations The LMV3xxA family is specified for operation from 2.5 V to 5.5 V (±1.25 V to ±2.75 V); many specifications apply from –40°C to 125°C. The Typical Characteristics section presents parameters that may exhibit significant variance with regard to operating voltage or temperature. CAUTION Supply voltages larger than 6 V may permanently damage the device; see the Absolute Maximum Ratings table. Place 0.1-µF bypass capacitors close to the power-supply pins to reduce coupling errors from noisy or highimpedance power supplies. For more detailed information on bypass capacitor placement, see the Layout Guidelines section. 9.1 Input and ESD Protection The LMV3xxA family incorporates internal ESD protection circuits on all pins. For input and output pins, this protection primarily consists of current-steering diodes connected between the input and power-supply pins. These ESD protection diodes provide in-circuit, input overdrive protection, as long as the current is limited to 10 mA. Figure 37 shows how a series input resistor can be added to the driven input to limit the input current. The added resistor contributes thermal noise at the amplifier input and the value must be kept to a minimum in noise-sensitive applications. V+ IOVERLOAD 10-mA maximum Device VOUT VIN 5 kW Figure 37. Input Current Protection 22 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A LMV321A, LMV324A, LMV358A www.ti.com SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 10 Layout 10.1 Layout Guidelines For best operational performance of the device, use good printed circuit board (PCB) layout practices, including: • Noise can propagate into analog circuitry through the power connections of the board and propagate to the power pins of the op amp itself. Bypass capacitors are used to reduce the coupled noise by providing a low-impedance path to ground. – Connect low-ESR, 0.1-µF ceramic bypass capacitors between each supply pin and ground, placed as close to the device as possible. A single bypass capacitor from V+ to ground is adequate for singlesupply applications. • Separate grounding for analog and digital portions of circuitry is one of the simplest and most effective methods of noise suppression. One or more layers on multilayer PCBs are usually devoted to ground planes. A ground plane helps distribute heat and reduces electromagnetic interference (EMI) noise pickup. Take care to physically separate digital and analog grounds, paying attention to the flow of the ground current. • To reduce parasitic coupling, run the input traces as far away from the supply or output traces as possible. If these traces cannot be kept separate, crossing the sensitive trace at a 90 degree angle is much better as opposed to running the traces in parallel with the noisy trace. • Place the external components as close to the device as possible, as shown in Figure 39. Keeping RF and RG close to the inverting input minimizes parasitic capacitance. • Keep the length of input traces as short as possible. Remember that the input traces are the most sensitive part of the circuit. • Consider a driven, low-impedance guard ring around the critical traces. A guard ring may significantly reduce leakage currents from nearby traces that are at different potentials. • Cleaning the PCB following board assembly is recommended for best performance. • Any precision integrated circuit can experience performance shifts resulting from moisture ingress into the plastic package. Following any aqueous PCB cleaning process, baking the PCB assembly is recommended to remove moisture introduced into the device packaging during the cleaning process. A low-temperature, post-cleaning bake at 85°C for 30 minutes is sufficient for most circumstances. 10.2 Layout Example + VIN 1 + VIN 2 VOUT 1 RG VOUT 2 RG RF RF Figure 38. Schematic Representation for Figure 39 Place components close to device and to each other to reduce parasitic errors . OUT 1 VS+ OUT1 Use low-ESR, ceramic bypass capacitor . Place as close to the device as possible . GND V+ RF OUT 2 GND IN1 ± OUT2 IN1 + IN2 ± RF RG VIN 1 GND RG V± Use low-ESR, ceramic bypass capacitor . Place as close to the device as possible . GND VS± IN2 + Ground (GND) plane on another layer VIN 2 Keep input traces short and run the input traces as far away from the supply lines as possible . Figure 39. Layout Example Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A Submit Documentation Feedback 23 LMV321A, LMV324A, LMV358A SBOS923F – DECEMBER 2017 – REVISED JANUARY 2020 www.ti.com 11 Device and Documentation Support 11.1 Documentation Support 11.1.1 Related Documentation For related documentation, see the following: • Texas Instruments, EMI Rejection Ratio of Operational Amplifiers 11.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to order now. Table 1. Related Links PARTS PRODUCT FOLDER ORDER NOW TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY LMV321A Click here Click here Click here Click here Click here LMV358A Click here Click here Click here Click here Click here LMV324A Click here Click here Click here Click here Click here 11.3 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document. 11.4 Support Resources TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight from the experts. Search existing answers or ask your own question to get the quick design help you need. Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. 11.5 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 11.6 Electrostatic Discharge Caution This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. 11.7 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 12 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the mostcurrent data available for the designated devices. This data is subject to change without notice and without revision of this document. For browser-based versions of this data sheet, see the left-hand navigation pane. 24 Submit Documentation Feedback Copyright © 2017–2020, Texas Instruments Incorporated Product Folder Links: LMV321A LMV324A LMV358A PACKAGE OPTION ADDENDUM www.ti.com 7-Jan-2020 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) LMV321AIDBVR ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 1OIF LMV321AIDCKR ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR -40 to 125 1C2 LMV321AUIDBVR PREVIEW SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 1WOF LMV324AIDR ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 125 LMV324 LMV324AIPWR ACTIVE TSSOP PW 14 2000 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR -40 to 125 LMV324A LMV358AIDDFR ACTIVE SOT-23-THIN DDF 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 358A LMV358AIDGKR ACTIVE VSSOP DGK 8 2500 Green (RoHS & no Sb/Br) CU NIPDAUAG Level-2-260C-1 YEAR -40 to 125 1MAX LMV358AIDGKT ACTIVE VSSOP DGK 8 250 Green (RoHS & no Sb/Br) CU NIPDAUAG Level-2-260C-1 YEAR -40 to 125 1MAX LMV358AIDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR -40 to 125 MV358A LMV358AIPWR ACTIVE TSSOP PW 8 2000 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR -40 to 125 LMV358 (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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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LMV321AIDCKR
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