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Texas Instruments LMV344MT/NOPB
- Part No.:
- LMV344MT/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMV344MT/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,238
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Product details
Overview
LMV344MT/NOPB from Texas Instruments is a quad rail-to-rail output CMOS operational amplifier optimized for low-voltage, low-power portable applications. It delivers 1 MHz gain bandwidth, 1 V/µs slew rate, 100 µA per amplifier supply current, and 20 fA input bias current, operating from 2.7 V to 5.5 V. It is used in battery monitoring, audio buffering, and sensor signal conditioning circuits where space, power, and precision are critical.
For engineers reviewing the LMV344MT/NOPB datasheet, LMV344MT/NOPB pinout, LMV344MT/NOPB application, or LMV344MT/NOPB equivalent, key selection considerations include its quad-channel TSSOP-14 package, rail-to-rail output swing (within 24 mV of rails at 2 kΩ load), −40°C to +125°C industrial-plus temperature range, and shutdown capability (available only on LMV341-N, not LMV344MT/NOPB).
Technical Context
The LMV344MT/NOPB implements a PMOS input stage enabling ultra-low input bias current (20 fA typical) and high input impedance, paired with a patented Class AB turnaround stage that reduces offset voltage, noise, and quiescent current without compromising slew rate or open-loop gain. Its rail-to-rail output stage supports full dynamic range utilization in single-supply systems.
It operates across 2.7 V–5.5 V supply, features 56 dB minimum CMRR and 65 dB minimum PSRR at 25°C, and maintains stable unity-gain operation with capacitive loads up to 100 pF - verified by phase margin ≥70° and gain margin ≥20 dB under standard test conditions (RL = 100 kΩ, CL = 200 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct integration into Li-ion and dual-cell alkaline-powered systems without level-shifting. |
| Gain Bandwidth Product | 1 MHz - supports stable closed-loop operation up to ~100 kHz with moderate gain (e.g., AV = 10) in sensor amplification stages. |
| Slew Rate | 1 V/µs - sufficient for audio-band signals (≤20 kHz) and fast-settling DC-coupled instrumentation paths. |
| Input Bias Current | 20 fA typical - minimizes voltage error in high-impedance source interfaces (e.g., photodiode transimpedance, pH electrodes). |
| Input Offset Voltage | 0.55 mV typical (25°C), 5.5 mV max (−40°C to +125°C) - suitable for precision DC-coupled gain stages requiring <1% error at 1 V output. |
| Output Swing (2 kΩ) | Within 24–95 mV of rails - delivers >98% usable output range in 3.3 V systems, preserving SNR in ADC driver applications. |
| Supply Current per Channel | 100 µA typical - enables four independent amplifiers consuming only 400 µA total, ideal for always-on battery sensing nodes. |
Pinout & Package
TSSOP-14 (PW package), body size 5.00 mm × 4.40 mm - surface-mount, thermally enhanced package compatible with automated assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail output capable of sourcing/sinking ≥18 mA; tri-stated only in LMV341-N shutdown mode (not applicable to LMV344MT/NOPB). |
| 2 (IN A−) | Inverting input, channel A | High-impedance PMOS node; requires matched trace routing to minimize common-mode error in differential configurations. |
| 3 (IN A+) | Noninverting input, channel A | Same high-Z input as IN A−; used for unity-gain buffers or noninverting gain stages with feedback to IN A−. |
| 4 (V+) | Positive supply | Primary power rail; must be decoupled with ≥100 nF ceramic capacitor placed ≤2 mm from pin. |
| 5–6, 10–13 | Input pairs B–D | Identical electrical behavior to channel A inputs; supports independent 4-channel signal conditioning without cross-talk degradation (crosstalk rejection >100 dB at 1 kHz). |
| 7 (OUT B), 8 (OUT C), 14 (OUT D) | Amplifier outputs B/C/D | Electrically identical to OUT A; each drives its own load independently with no shared internal nodes. |
| 9 (IN C−), 10 (IN C+), 12 (IN D+), 13 (IN D−) | Channel C & D inputs | Full functional replication of channels A/B; all four channels operate simultaneously with guaranteed AC/DC specs over temperature. |
| 11 (V−) | Negative supply | Ground reference for single-supply operation; connects directly to PCB ground plane for lowest noise and thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS input stage | Delivers 20 fA input bias current - eliminates leakage-induced errors in nanoamp-level sensor interfaces (e.g., gas sensors, medical electrodes). |
| Rail-to-rail output | Swings within 24 mV of V+ and V− at 2 kΩ load - maximizes dynamic range in 3.3 V ADC front-ends without external level-shifting. |
| Class AB turnaround architecture | Reduces input-referred voltage noise to 29 nV/√Hz at 10 kHz while maintaining 1 MHz GBW - improves SNR in audio and precision analog signal chains. |
| Wide temperature range | Specified from −40°C to +125°C - ensures reliable operation in automotive cabin modules, industrial motor controllers, and outdoor IoT edge nodes. |
| Low supply current | 100 µA per amplifier at 25°C - enables four-channel active signal conditioning in energy-harvesting or coin-cell-powered devices. |
Applications
| Battery Monitoring System | Portable Audio Interface |
|---|---|
Use Scenario: Real-time voltage and temperature sampling across 4-series Li-ion cells in handheld power tools or medical defibrillators. IC Role / Device Role / Timing Role: Quad op-amp configured as four independent buffer-amplifiers, each conditioning cell voltage before multiplexed ADC conversion. Use Value: 20 fA input bias prevents loading of high-impedance cell voltage dividers; rail-to-rail output ensures full 0–3.6 V range maps linearly to 12-bit ADC reference. | Use Scenario: Line-level signal buffering and filtering in USB-C audio dongles or Bluetooth headset control boards. IC Role / Device Role / Timing Role: One channel as anti-aliasing filter driver, one as headphone amplifier buffer, two as microphone preamp gain stages. Use Value: 1 V/µs slew rate supports 20 kHz audio bandwidth without distortion; 100 µA/channel enables always-on audio presence detection with <500 µA total system quiescent current. |
| Sensor Signal Conditioning | Industrial Process Controller I/O |
Use Scenario: Amplifying low-level outputs from four RTD, thermocouple, or strain gauge bridges in compact PLC modules. IC Role / Device Role / Timing Role: Quad instrumentation-grade buffer driving 24-bit sigma-delta ADC inputs with matched gain and offset calibration. Use Value: 0.55 mV typical VOS and 1.7 µV/°C drift enable ±0.1°C temperature accuracy over −25°C to +85°C without per-channel trimming. | Use Scenario: Isolated analog input conditioning for 4-channel 4–20 mA current loop receivers in factory automation gateways. IC Role / Device Role / Timing Role: Four independent transimpedance amplifiers converting loop current to voltage, followed by level-shifting and filtering. Use Value: 2.7 V min supply allows direct operation from isolated 3.3 V rails; 125°C rating supports placement near hot I/O ASICs without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9054IDR | Higher 5 MHz GBW, 15 V/µs slew rate, but 240 µA/channel supply current; same TSSOP-14 package. | Better for wideband active filters or fast-settling data acquisition; less suitable for ultra-low-power battery monitoring. | Select TLV9054IDR when bandwidth >1 MHz or settling time <1 µs is required; LMV344MT/NOPB preferred for sub-500 µA total system budget. |
| LMV324DR | Lower 1.2 MHz GBW, 0.5 V/µs slew rate, 210 µA/channel, wider −40°C to +105°C range; SOIC-14 package only. | Cost-optimized for consumer electronics; lacks guaranteed 125°C operation and ultra-low input bias current. | Choose LMV324DR for cost-sensitive, non-extended-temp applications; LMV344MT/NOPB required for industrial-grade reliability and fA-level input leakage control. |
Compared with TLV9054IDR and LMV324DR, LMV344MT/NOPB uniquely balances ultra-low power (100 µA/channel), precision (20 fA IB, 0.55 mV VOS), and extended temperature operation (−40°C to +125°C) in a space-efficient TSSOP-14 package - making it optimal for battery-constrained, high-reliability embedded sensing.
Availability
LMV344MT/NOPB is available at Aetrix Electronics and suitable for battery monitoring, portable audio interfaces, sensor signal conditioning, and industrial process controller I/O requiring stable component supply and long-term manufacturability.
Supply support for LMV344MT/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMV34x-N product line was designed specifically for low-voltage portable applications demanding rail-to-rail output, ultra-low power, and high-precision performance in minimal PCB area - targeting space- and energy-constrained designs like wearables, handheld medical devices, and smart sensors.
FAQ
Does LMV344MT/NOPB have a shutdown pin?
No, LMV344MT/NOPB does not include a shutdown pin. Shutdown functionality is exclusive to the LMV341-N (single-channel) variant. The LMV344MT/NOPB is a quad amplifier with fixed-enable operation - all four channels remain active whenever V+ and V− are powered within specification. Power gating must be implemented externally if needed.
What is the maximum capacitive load LMV344MT/NOPB can drive stably?
LMV344MT/NOPB maintains stability with capacitive loads up to 100 pF when configured as a unity-gain buffer (AV = +1) with RL = 100 kΩ, as confirmed by ≥70° phase margin in the datasheet. For loads >100 pF, external isolation resistance (e.g., 10–50 Ω in series with the output) is recommended to preserve phase margin and prevent peaking or oscillation.
Can LMV344MT/NOPB operate from a single 3.3 V supply?
Yes, LMV344MT/NOPB is fully specified for single-supply operation from 2.7 V to 5.5 V. At 3.3 V, it delivers rail-to-rail output swing (within 30 mV of V+ and V− at 10 kΩ load), 1 MHz GBW, and 100 µA per amplifier supply current - making it ideal for direct interface with 3.3 V microcontrollers and ADCs without level-shifting circuitry.
Is LMV344MT/NOPB pin-compatible with LMV324?
No, LMV344MT/NOPB is not pin-compatible with LMV324. While both are quad op-amps in 14-pin packages, LMV344MT/NOPB uses TSSOP-14 (PW) with pin 4 = V+, pin 11 = V−, and dedicated input/output assignments per channel. LMV324 uses SOIC-14 (D) with pin 4 = V− and pin 14 = V+, requiring PCB layout revision for substitution.
What is the input common-mode voltage range for LMV344MT/NOPB?
The input common-mode voltage range for LMV344MT/NOPB extends from V− to (V+ − 1.2 V) at 25°C - e.g., 0 V to 2.1 V on a 3.3 V supply. This allows operation with inputs near ground but not rail-to-rail input; for true rail-to-rail input capability, consider TI's TLV9064 or OPA391 families instead.
LMV344MT/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
LMV344MT/NOPB FAQ
1.How can I place an order for LMV344MT/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV344MT/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 LMV344MT/NOPB reliable?
The price and inventory of LMV344MT/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV344MT/NOPB is usually 5 days.
3.What payment methods are accepted for LMV344MT/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV344MT/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV344MT/NOPB?
LMV344MT/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV344MT/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 LMV344MT/NOPB?
For technical support, including LMV344MT/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV344MT/NOPB requirements.
6.How does Aetrix verify that LMV344MT/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV344MT/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 LMV344MT/NOPB meets industry standards.
7.What is the process for return or replacement of LMV344MT/NOPB?
All LMV344MT/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV344MT/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 LMV344MT/NOPB part is unused and in its original packaging.
Return procedure for LMV344MT/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV344MT/NOPB Tags
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