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Texas Instruments LMV344MA/NOPB
- Part No.:
- LMV344MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV344MA/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:222
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Product details
Overview
LMV344MA/NOPB from Texas Instruments is a quad rail-to-rail output CMOS operational amplifier optimized for low-voltage portable applications. It delivers 1 MHz gain bandwidth, 1 V/µs slew rate, 100 µA per amplifier supply current, and 29 nV/√Hz input voltage noise at 10 kHz - enabling precision signal conditioning in battery-powered systems such as PDAs and audio interfaces.
For engineers reviewing the LMV344MA/NOPB datasheet, LMV344MA/NOPB pinout, LMV344MA/NOPB application, or LMV344MA/NOPB equivalent, key selection criteria include its −40°C to +125°C operating range, 2.7 V to 5.5 V supply compatibility, ultra-low 20 fA input bias current, and quad-channel TSSOP-14 footprint for space-constrained PCB layouts.
Technical Context
The LMV344MA/NOPB implements a patented Class AB turnaround stage that reduces input-referred offset voltage, high-frequency noise, and quiescent power while preserving slew rate and open-loop gain. Its PMOS input stage enables 20 fA typical input bias current and high input impedance across the full industrial-plus temperature range.
It operates with single-supply rails from 2.7 V to 5.5 V and features rail-to-rail output swing (within 24 mV of V+ and 30 mV of V− at 2 kΩ load), 56 dB minimum CMRR, and 65 dB minimum PSRR - supporting stable DC-coupled and AC-coupled signal paths in mixed-signal portable electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct connection to Li-ion, Li-poly, or dual-cell alkaline battery rails without regulation. |
| Gain Bandwidth Product | 1 MHz - enables stable unity-gain buffer or gain-of-10 amplification up to ~100 kHz with adequate phase margin. |
| Slew Rate | 1 V/µs - sufficient for 100 kHz full-scale sine wave output at 1 VPP without distortion in audio and sensor front-ends. |
| Input Bias Current | 20 fA (typ) - minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes, photodiode transimpedance). |
| Input Voltage Noise | 29 nV/√Hz at 10 kHz - optimized for mid-frequency signal chains where thermal noise dominates over 1/f noise. |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin, industrial control, and extended-environment portable equipment. |
| Output Swing (RL = 2 kΩ) | Within 24 mV of V+ and 30 mV of V− - ensures >98% dynamic range utilization in 3.3 V or 5 V single-supply systems. |
Pinout & Package
LMV344MA/NOPB is packaged in a 14-pin TSSOP (PW package), body size 5.00 mm × 4.40 mm, with exposed pad for thermal enhancement and standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail output capable of sourcing/sinking ≥18 mA; tri-stated in shutdown mode (not applicable to LMV344-N). |
| 2 (IN A−) | Inverting input, channel A | High-impedance PMOS node; accepts common-mode voltages from V− to V+ − 0.2 V. |
| 3 (IN A+) | Noninverting input, channel A | High-impedance PMOS node; matched to IN A− for <4.5 mV max input offset over temperature. |
| 4 (V+) | Positive supply | Main power rail; must be decoupled with ≥100 nF ceramic capacitor near pin for stability. |
| 5–6, 10–13 | Input pairs B/C/D | Identical electrical behavior to channel A; independent inputs enable multi-channel signal conditioning without crosstalk degradation. |
| 7–8 (OUT B/C) | Amplifier B/C outputs | Individually buffered outputs; no internal inter-channel coupling - suitable for simultaneous analog processing paths. |
| 9 (IN C−) | Inverting input, channel C | Electrically identical to IN A−; layout symmetry recommended to minimize matching errors. |
| 11 (V−) | Negative supply | Ground reference for single-supply operation; connects directly to PCB ground plane. |
| 12–13 (IN D+/IN D−) | Noninverting/inverting inputs, channel D | Final differential pair; supports independent gain configuration per channel in multi-stage filters or instrumentation topologies. |
| 14 (OUT D) | Amplifier D output | Full rail-to-rail swing; specified output short-circuit current: 18 mA sourcing, 15 mA sinking. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers >99% of supply rail voltage swing at 2 kΩ load - maximizes ADC input range and dynamic headroom in 3.3 V systems. |
| PMOS input architecture | Enables 20 fA input bias current - critical for maintaining accuracy in high-Z sensor interfaces and long-time-constant integrators. |
| Class AB turnaround stage | Reduces input offset drift to 1.7 µV/°C and lowers 10 kHz noise to 29 nV/√Hz without sacrificing bandwidth or slew rate. |
| Wide supply range (2.7–5.5 V) | Eliminates need for LDO pre-regulation when interfacing with modern battery chemistries or USB-powered subsystems. |
| Industrial-plus temperature rating | Guarantees parametric performance from −40°C to +125°C - validated for under-hood automotive, factory automation, and outdoor IoT nodes. |
Applications
| Battery Monitoring | Audio Line Driver |
|---|---|
|
Use Scenario: Real-time monitoring of individual cell voltage in 2–4 series Li-ion packs for portable medical devices. IC Role / Device Role / Timing Role: Quad op-amp configured as four independent precision buffers driving 12-bit SAR ADC inputs. Use Value: 20 fA input bias prevents loading of high-resistance voltage divider networks; rail-to-rail output ensures full-scale digitization across 0–4.2 V cell range. |
Use Scenario: Low-noise line-level driver for stereo headphone output in Bluetooth-enabled speakers. IC Role / Device Role / Timing Role: Dual-channel noninverting amplifier (channels A/B) with gain = 2, driving 32 Ω loads via AC-coupled outputs. Use Value: 29 nV/√Hz noise floor preserves SNR >95 dB(A); 1 V/µs slew rate supports 20 kHz full-scale audio without slewing distortion. |
| Portable Sensor Interface | Multi-Channel Data Acquisition |
|
Use Scenario: Signal conditioning for four parallel MEMS accelerometers in handheld test equipment. IC Role / Device Role / Timing Role: Quad op-amp used as anti-aliasing filter (Sallen-Key LPF), DC offset adjust, and drive stage per sensor channel. Use Value: Matched input characteristics across all four channels ensure consistent gain/phase response; 1 MHz GBW supports ≤100 kHz cutoff filters. |
Use Scenario: Analog front-end for 4-channel industrial data logger sampling thermocouples and RTDs. IC Role / Device Role / Timing Role: Four independent programmable-gain amplifier stages (PGA) using external resistor networks per channel. Use Value: −40°C to +125°C operation guarantees calibration stability across environmental chambers; 56 dB CMRR rejects common-mode noise from shared ground returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher supply current (550 µA/ch), higher input bias (1 pA), 6.4 MHz GBW, no guaranteed 125°C operation | Better for higher-speed, lower-precision applications; not suitable for ultra-low-power or extended-temperature designs | Select TLV2464IDR only if bandwidth >3 MHz is required and 125°C operation is unnecessary. |
| LMV944MAX/NOPB | Lower supply current (125 µA/ch), same 1 MHz GBW, 2.7 V min supply, but only rated to 85°C ambient | Acceptable for commercial-grade portable gear; lacks industrial-plus qualification for harsh environments | Choose LMV944MAX/NOPB for cost-sensitive consumer products where extended temperature range is not required. |
Compared with TLV2464IDR and LMV944MAX/NOPB, LMV344MA/NOPB uniquely combines 100 µA/ch quiescent current, 20 fA input bias, and guaranteed −40°C to +125°C operation - making it the only option among the three qualified for battery-powered industrial sensors and automotive cabin electronics.
Availability
LMV344MA/NOPB is available at Aetrix Electronics and suitable for battery monitoring, portable sensor interface, audio line driving, and multi-channel data acquisition requiring stable component supply across automotive, industrial, and medical portable equipment programs.
Supply support for LMV344MA/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and low-power signal chain solutions.
The LMV34x-N product line was designed specifically for low-voltage portable applications demanding rail-to-rail output, ultra-low input bias current, and extended temperature operation - targeting cordless phones, PDAs, PCMCIA cards, and battery-powered instrumentation.
FAQ
What is the maximum operating temperature for LMV344MA/NOPB?
The LMV344MA/NOPB is fully specified and tested from −40°C to +125°C ambient temperature. This industrial-plus rating is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 6.4 (Thermal Information) of the official TI datasheet SNOS990H. The device maintains all key parameters - including input offset voltage, CMRR, and output swing - across this full range, making LMV344MA/NOPB suitable for under-hood automotive and factory-floor applications where thermal stress is significant.
Does LMV344MA/NOPB include a shutdown feature like the LMV341-N?
No, LMV344MA/NOPB does not include a shutdown pin or function. The shutdown capability is exclusive to the LMV341-N (single-channel) variant, as documented in Sections 5 and 7.4.1 of the datasheet. LMV344MA/NOPB is a quad amplifier with fixed operation - all four channels remain active whenever V+ and V− are powered. Power savings must be achieved externally via supply switching or system-level sleep modes.
What is the input common-mode voltage range for LMV344MA/NOPB?
The input common-mode voltage range for LMV344MA/NOPB extends from V− to V+ − 0.2 V under standard operating conditions (Section 6.5, VCM specification). At 2.7 V supply, this yields 0 V to 2.5 V; at 5 V supply, it is 0 V to 4.8 V. This range is validated for CMRR ≥50 dB and applies to all four amplifier channels. Exceeding V+ − 0.2 V may degrade common-mode rejection and increase input offset error.
Can LMV344MA/NOPB drive a 600 Ω load at 1 kHz with low THD?
Yes, LMV344MA/NOPB achieves 0.012% THD+N at 1 kHz with 1 VPP output into 600 Ω (Section 6.8, THD specification). This performance is enabled by its 1 V/µs slew rate and stable unity-gain configuration. For sustained 1 VPP into 600 Ω, ensure proper PCB layout with local 100 nF V+ decoupling and avoid exceeding 25°C ambient to maintain thermal headroom - output current capability remains >15 mA sinking and >18 mA sourcing across temperature.
Is LMV344MA/NOPB pin-compatible with other quad op-amps in TSSOP-14 packages?
LMV344MA/NOPB uses the industry-standard TSSOP-14 pinout defined in TI's PW package drawing, matching mechanical and pad-layout dimensions of generic TSSOP-14 footprints. However, electrical pin functions - especially V− on pin 11 and input/output assignments - differ from legacy quad op-amps (e.g., LM324, TL074). Direct replacement requires schematic and layout verification; LMV344MA/NOPB is not a drop-in substitute for non-rail-to-rail or non-PMOS-input devices.
LMV344MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.02 pA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 107µA (x4 Channels)
- Current - Output / Channel:
- 113 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMV344MA/NOPB FAQ
1.How can I place an order for LMV344MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV344MA/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMV344MA/NOPB reliable?
The price and inventory of LMV344MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV344MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMV344MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV344MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV344MA/NOPB?
LMV344MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV344MA/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMV344MA/NOPB?
For technical support, including LMV344MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV344MA/NOPB requirements.
6.How does Aetrix verify that LMV344MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV344MA/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMV344MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMV344MA/NOPB?
All LMV344MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV344MA/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMV344MA/NOPB part is unused and in its original packaging.
Return procedure for LMV344MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV344MA/NOPB Tags
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