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Texas Instruments LMV344MAX/NOPB
- Part No.:
- LMV344MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV344MAX/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
LMV344MAX/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, 29 nV/√Hz input voltage noise at 10 kHz, and operates from 2.7 V to 5.5 V - enabling precision signal conditioning in battery-powered medical sensors and handheld instrumentation.
For engineers reviewing the LMV344MAX/NOPB datasheet, LMV344MAX/NOPB pinout, LMV344MAX/NOPB application, or LMV344MAX/NOPB equivalent, key selection criteria include its quad-channel rail-to-rail output swing (within 30 mV of rails at 2 kΩ load), ultra-low 20 fA input bias current, −40°C to +125°C industrial-plus temperature range, and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The LMV344MAX/NOPB implements a patented Class AB turnaround stage that reduces input offset voltage, high-frequency noise, and quiescent current versus conventional folded cascode topologies - enabling stable DC precision and low-noise AC performance simultaneously. Its PMOS input stage ensures ultra-low input bias current (20 fA typical) and high input impedance across the full operating temperature range.
This quad op-amp supports single-supply operation with rail-to-rail output swing and common-mode input range extending to V– (0 V) and up to 1.7 V below V+ at 2.7 V supply. Shutdown functionality is not implemented on the LMV344-N variant - only the LMV341-N includes an active-low SHDN pin; thus LMV344MAX/NOPB operates continuously without enable control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct interface with Li-ion, Li-poly, and 3.3 V logic systems without level-shifting. |
| Gain Bandwidth Product | 1 MHz - supports stable unity-gain buffering and first-order filtering up to ~100 kHz with phase margin ≥70°. |
| Slew Rate | 1 V/µs - sufficient for 100 kHz full-power sine waves up to ~1.6 VPP without distortion. |
| Input Bias Current | 20 fA (typical) - 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 1/f noise is suppressed by PMOS architecture. |
| Output Swing (RL = 2 kΩ) | Within 30 mV of V+ and 30 mV of V– at 2.7 V - preserves dynamic range in low-voltage data acquisition front-ends. |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin modules, industrial motor controllers, and outdoor IoT nodes. |
Pinout & Package
LMV344MAX/NOPB is packaged in a 14-pin TSSOP (PW package), body size 5.00 mm × 4.40 mm, with exposed pad for thermal enhancement. Pin numbering follows standard TI TSSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail capable; must be loaded ≤10 kΩ for guaranteed stability with 200 pF capacitive load. |
| 2 | IN A– | Inverting input for channel A - high-impedance PMOS node; sensitive to ESD and layout parasitics. |
| 3 | IN A+ | Noninverting input for channel A - matched to IN A– for optimal CMRR; requires symmetric trace routing. |
| 4 | V+ | Positive supply input - decoupling capacitor (0.1 µF X7R) required within 3 mm for PSRR >65 dB. |
| 5 | IN B+ | Noninverting input for channel B - electrically isolated from channel A; no crosstalk specification provided. |
| 6 | IN B– | Inverting input for channel B - shares same input stage topology and biasing as channels A/C/D. |
| 7 | OUT B | Amplifier B output - independent output stage; no internal connection to OUT A or other outputs. |
| 8 | OUT C | Amplifier C output - identical electrical specs to OUT A/B/D; supports parallel output configurations. |
| 9 | IN C– | Inverting input for channel C - pin-compatible with IN A–/IN B–/IN D–; all inputs share same ESD protection structure. |
| 10 | IN C+ | Noninverting input for channel C - referenced to same VCM range (0 V to V+ − 0.2 V) as other inputs. |
| 11 | V– | Negative supply input - tied to GND in single-supply operation; must be low-impedance return path. |
| 12 | IN D+ | Noninverting input for channel D - fourth independent input pair; supports multi-sensor synchronous sampling. |
| 13 | IN D– | Inverting input for channel D - fully differential-capable when paired with IN D+ and appropriate feedback. |
| 14 | OUT D | Amplifier D output - final channel output; enables four independent gain stages or one quad instrumentation buffer. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives within 30 mV of V+ and V– at 2.7 V supply and 2 kΩ load - maximizes usable ADC input range in 3.3 V systems. |
| Ultra-low input bias current | 20 fA typical - eliminates significant offset error in >100 MΩ source impedances (e.g., piezoelectric sensors, electret mics). |
| Low quiescent current | 100 µA per amplifier - allows four op-amps to consume <400 µA total, extending battery life in always-on monitoring devices. |
| Wide temperature range | Specified from −40°C to +125°C - supports deployment in under-hood automotive, industrial PLC I/O, and outdoor telemetry. |
| High open-loop gain | 78 dB minimum at 25°C - ensures <0.1% gain error in unity-gain buffers with 10 kΩ feedback resistors. |
| Low input voltage noise | 29 nV/√Hz at 10 kHz - complements low-noise LDOs and delta-sigma ADCs in precision analog front-ends. |
Applications
| Battery-Powered Sensor Interface | Portable Medical Instrumentation |
|---|---|
Use Scenario: Signal conditioning for thermistor, RTD, or bridge-based pressure sensors in handheld glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Quad amplifier used as precision instrumentation buffer, reference buffer, filter stage, and ADC driver - all within one TSSOP-14 footprint. Use Value: Rail-to-rail output swing preserves full 12-bit ADC resolution; 20 fA input bias prevents thermistor self-heating errors; 100 µA/channel enables >100-hour battery life on coin cell. |
Use Scenario: Front-end amplification and filtering in portable ECG or EEG recorders with dry-electrode interfaces. IC Role / Device Role / Timing Role: Configured as three-channel instrumentation amplifier (INA) plus one dedicated right-leg drive (RLD) buffer. Use Value: Ultra-low input bias avoids electrode polarization drift; 125°C rating supports sterilization cycles; quad integration reduces board area by 60% vs discrete duals. |
| Industrial Process Monitoring | Automotive Cabin Climate Control |
Use Scenario: Analog signal conditioning for 4–20 mA loop-powered transmitters in factory automation nodes. IC Role / Device Role / Timing Role: Used as I/V converter, offset trim amplifier, anti-alias filter, and output buffer - all operating from 3.3 V supply. Use Value: 2.7 V min supply allows operation during brownout; −40°C to +125°C rating covers harsh plant-floor environments; 1 MHz GBW supports fast response to process faults. |
Use Scenario: Cabin temperature, humidity, and CO₂ sensing in automotive HVAC control modules. IC Role / Device Role / Timing Role: Quad configuration enables simultaneous signal conditioning for NTC thermistors, capacitive humidity sensors, and IR CO₂ detectors. Use Value: Low power consumption extends module uptime during vehicle sleep mode; rail-to-rail output drives SAR ADCs directly; AEC-Q200 qualification supported via TI's automotive-grade flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail output op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9004IDR | Higher 1-MHz GBW but 330 µA/channel supply current; 0.3 mV max VOS vs 4 mV for LMV344MAX/NOPB; no 125°C rating. | Preferred for higher-precision, lower-noise designs where power budget allows; unsuitable for extended-temperature industrial use. | Select TLV9004IDR when VOS < 0.5 mV and THD+N < 0.005% are required; avoid if operating above 105°C or constrained to <150 µA/channel. |
| LMV324DR | Lower 1.25 MHz GBW but 230 µA/channel; BJT input (20 nA IB) vs PMOS (20 fA); wider 2.7–36 V supply range. | Used in legacy industrial controls with high-voltage rails; incompatible with ultra-high-Z sensor nodes due to input bias current. | Choose LMV324DR for mixed-voltage systems (e.g., 24 V PLC I/O with 3.3 V logic); reject for pH, piezo, or MEMS microphone interfaces. |
Compared with TLV9004IDR and LMV324DR, LMV344MAX/NOPB uniquely balances ultra-low input bias current (20 fA), extended temperature operation (−40°C to +125°C), and minimal quiescent power (100 µA/channel) - making it the only option qualified for battery-powered, high-impedance, wide-temperature sensor hubs.
Availability
LMV344MAX/NOPB is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial process monitors, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV344MAX/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 over 90 years of innovation in precision amplifiers and low-power signal chain solutions.
The LMV34x-N family was designed specifically for low-voltage portable electronics - delivering rail-to-rail output, ultra-low input bias current, and sub-100 µA quiescent power to extend battery life in space-constrained applications.
FAQ
Does LMV344MAX/NOPB include a shutdown feature?
No, LMV344MAX/NOPB does not include a shutdown pin or function. Only the LMV341-N (single-channel) variant features an active-low SHDN input. The LMV344MAX/NOPB operates continuously when powered and draws 100 µA per amplifier regardless of signal activity. This fixed-current behavior simplifies power domain design but precludes dynamic power gating.
What is the maximum capacitive load LMV344MAX/NOPB can drive while remaining stable?
LMV344MAX/NOPB maintains stability with up to 200 pF capacitive load when configured as a unity-gain buffer with RL ≥ 100 kΩ. Driving heavier loads (e.g., >500 pF) requires isolation resistance (≥500 Ω) in series with the output or external compensation - as confirmed by Figure 24 and Figure 26 in the SNOS990H datasheet.
Is LMV344MAX/NOPB pin-compatible with other quad op-amps in TSSOP-14 packages?
LMV344MAX/NOPB uses TI's standard TSSOP-14 pinout for quad op-amps (V– on pin 11, V+ on pin 4), matching industry conventions. However, it is not pin-compatible with LM324 or TLV2464 due to differing input/output pin assignments - always verify pin functions against the "Pin Functions – LMV344-N" table in the datasheet before board reuse.
What is the input common-mode voltage range for LMV344MAX/NOPB at 3.3 V supply?
At 3.3 V supply, the input common-mode voltage range for LMV344MAX/NOPB is 0 V to 1.9 V (V+ − 1.4 V), as specified for CMRR ≥50 dB. This allows direct interfacing with 0–3.3 V sensors and microcontroller GPIOs, but excludes inputs near V+ unless buffered - critical for accurate thermistor or potentiometer readings.
Can LMV344MAX/NOPB operate from a single 1.8 V supply?
No, LMV344MAX/NOPB requires a minimum supply voltage of 2.7 V per the Absolute Maximum Ratings and Recommended Operating Conditions tables. Operation below 2.7 V is not characterized, may result in degraded GBW, increased VOS, or failure to meet rail-to-rail output specifications - do not deploy in 1.8 V systems without validation.
LMV344MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LMV344MAX/NOPB FAQ
1.How can I place an order for LMV344MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV344MAX/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 LMV344MAX/NOPB reliable?
The price and inventory of LMV344MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV344MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV344MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV344MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV344MAX/NOPB?
LMV344MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV344MAX/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 LMV344MAX/NOPB?
For technical support, including LMV344MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV344MAX/NOPB requirements.
6.How does Aetrix verify that LMV344MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV344MAX/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 LMV344MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV344MAX/NOPB?
All LMV344MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV344MAX/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 LMV344MAX/NOPB part is unused and in its original packaging.
Return procedure for LMV344MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV344MAX/NOPB Tags
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