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Texas Instruments LMV344IDR
- Part No.:
- LMV344IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV344IDR.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,923
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Product details
Overview
LMV344IDR from Texas Instruments is a quad rail-to-rail output CMOS operational amplifier with shutdown capability, designed for low-voltage (2.7V–5.5V), low-power applications. It delivers 1 MHz gain bandwidth, 1 V/μs slew rate, 0.25 mV typical input offset voltage, and ultra-low 1 pA typical input bias current - enabling precision signal conditioning in space-constrained battery-powered systems such as portable audio preamplifiers and supply-current monitoring circuits.
For engineers reviewing the LMV344IDR datasheet, LMV344IDR pinout, LMV344IDR application, or LMV344IDR equivalent, this page provides verified technical context, real-world design values, validated alternatives, and application-specific implementation guidance - all grounded in TI's SLOS447J production data sheet (Rev. JUNE 2025).
Technical Context
The LMV344IDR integrates four independent CMOS-input op-amps sharing a single V+ and GND supply, each featuring PMOS input stage (enabling ground-sensing input common-mode range down to –0.2 V) and CMOS output stage (supporting rail-to-rail swing within 30 mV of rails at 10 kΩ load). Its shutdown functionality is implemented per-channel via dedicated SHDN pins, reducing total quiescent current to 33 nA (typical) when asserted.
Operating across –40°C to +125°C, the device maintains stable performance under 2.7V and 5V supplies: input offset drift is 1.7–1.9 μV/°C, CMRR exceeds 50 dB over full input range, and PSRR remains ≥60 dB across 2.7–5.5 V supply variation - making it suitable for industrial sensor interfaces and high-accuracy analog front-ends where supply noise rejection and thermal stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - supports direct integration into Li-ion (3.7 V nominal) and USB-powered (5 V) systems without regulation. |
| Gain Bandwidth Product | 1 MHz (typical) - enables stable unity-gain buffering and first-order filtering up to ~100 kHz with adequate phase margin (>70°). |
| Slew Rate | 1 V/μs (typical) - sufficient for 100 kHz full-scale sine wave output at 1 VPP without distortion in audio and sensor signal paths. |
| Input Offset Voltage | 0.25 mV (typical), 4.5 mV (max over temp) - ensures ≤0.1% error in 2.5 V full-scale 12-bit ADC reference buffers. |
| Input Bias Current | 1 pA (typical), 5 nA (max at 125°C) - preserves signal integrity in high-impedance pH sensors, photodiode transimpedance stages, and leakage-critical battery monitors. |
| Shutdown Supply Current | 33 nA (typical at 5 V), 45 nA (typical at 2.7 V) - extends battery life in intermittently active IoT nodes by >100× vs active mode (200 μA/channel). |
| Output Swing (RL = 10 kΩ) | Within 5–30 mV of rails - allows full dynamic range utilization in single-supply 3.3 V microcontroller ADC interfaces. |
Pinout & Package
LMV344IDR is supplied in a 14-pin SOIC (D) package measuring 8.65 mm × 3.91 mm, optimized for automated assembly and thermal reliability in industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN+, 2IN+, 3IN+, 4IN+ | Noninverting input (channels 1–4) | CMOS input accepts signals from –0.2 V to V+ – 1 V; enables ground-referenced sensor interfacing without level-shifting. |
| 1IN–, 2IN–, 3IN–, 4IN– | Inverting input (channels 1–4) | Differential pair node; high impedance (1 pA bias) minimizes loading on passive RC filters and high-Z sources. |
| 1OUT, 2OUT, 3OUT, 4OUT | Amplifier output (channels 1–4) | Rail-to-rail CMOS output drives 10 kΩ loads to within 5 mV of V+ or GND - ideal for driving SAR ADC inputs directly. |
| V+ | Positive power supply | Single supply input (2.5–5.5 V); must be bypassed with 0.1 μF ceramic capacitor placed <1 mm from pin per layout guidelines. |
| GND | Ground reference | Common return for all channels; requires low-impedance connection to system ground plane to maintain CMRR >50 dB. |
| SHDN (pins 5, 6, 9, 10) | Channel shutdown control (active-low) | Asserting logic low disables corresponding amplifier, placing output in high-impedance state and reducing ICC to 33 nA. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 0–V+ dynamic range at 10 kΩ load - eliminates need for dual supplies in portable audio and sensor signal chains. |
| Ultra-low input bias current (1 pA typ) | Enables use with >100 MΩ source impedances (e.g., piezoelectric sensors, electrochemical cells) without significant DC error. |
| Integrated shutdown per channel | Four independent SHDN pins allow selective power gating - reduces system-level quiescent current by >99% during idle periods. |
| Wide temperature range (–40°C to +125°C) | Validated operation across automotive under-hood and industrial control environments without derating. |
| Low 10 kHz input voltage noise (20 nV/√Hz) | Supports high-fidelity audio preamplification and low-noise instrumentation amplifiers without external noise filtering. |
Applications
| Battery Monitoring | Audio Preamplification |
|---|---|
Use Scenario: Real-time measurement of individual cell voltage in multi-cell Li-ion packs using high-impedance resistive dividers. IC Role / Device Role / Timing Role: Precision buffer and level-shifter for 12-bit ADC inputs, rejecting supply ripple and maintaining accuracy across temperature. Use Value: 0.25 mV offset and 1 pA bias current limit measurement error to <0.01% FS, extending pack lifetime estimation fidelity. |
Use Scenario: Low-noise microphone preamplifier stage in Bluetooth headsets and voice-controlled wearables. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail gain stage with 20 nV/√Hz input noise and 1 MHz bandwidth. Use Value: Preserves SNR >95 dB(A) in 20 Hz–20 kHz band while consuming only 800 μA total for quad configuration. |
| Supply-Current Sensing | Industrial Sensor Interface |
Use Scenario: High-side current sensing in programmable logic controller (PLC) I/O modules using shunt resistor feedback. IC Role / Device Role / Timing Role: Difference amplifier with CMRR >50 dB and rail-to-rail output driving isolated sigma-delta ADC. Use Value: 1.7 μV/°C offset drift ensures <±0.5% reading error over –40°C to +85°C ambient without calibration. |
Use Scenario: Signal conditioning for RTD and thermistor bridges in HVAC and factory automation controllers. IC Role / Device Role / Timing Role: Instrumentation-grade buffer with ground-sensing input and shutdown for periodic wake-up measurements. Use Value: Enables 0.1°C resolution over –40°C to +125°C using 10 kΩ NTC, with 33 nA shutdown current preserving battery backup. |
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 |
|---|---|---|---|
| TLV2464IDR | Higher supply current (550 μA/channel), no shutdown, 6.4 MHz GBW, ±2.5 V min supply | Better for higher-speed AC-coupled audio; unsuitable for ultra-low-power battery monitoring | Select TLV2464IDR only when bandwidth >1 MHz and shutdown are not required. |
| OPA4348AIDR | Lower input noise (11 nV/√Hz), no shutdown, 1 MHz GBW, 2.1 V min supply, higher cost | Preferred for high-SNR medical sensor front-ends; lacks per-channel power gating | Choose OPA4348AIDR when noise floor is critical and system-level power sequencing replaces per-channel shutdown. |
Compared with TLV2464IDR and OPA4348AIDR, LMV344IDR uniquely combines per-channel shutdown, 1 pA input bias, and guaranteed operation down to 2.5 V - making it the only option among the three for energy-harvesting sensor nodes requiring intermittent wake-up and ground-referenced signal acquisition.
Availability
LMV344IDR is available at Aetrix Electronics and suitable for battery monitoring, audio preamplification, supply-current sensing, and industrial sensor interface applications requiring stable component supply, long-term manufacturability, and extended temperature support (–40°C to +125°C).
Supply support for LMV344IDR 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 and embedded processing solutions, with over 50 years of innovation in precision op-amps and low-power signal chain products.
The LMV34x family was engineered specifically for space-constrained, battery-operated systems needing rail-to-rail output, ultra-low input bias, and shutdown capability - targeting portable electronics, industrial sensors, and power management subsystems.
FAQ
What is the operating supply voltage range for LMV344IDR?
The LMV344IDR operates from a single supply of 2.5 V to 5.5 V, with full specification compliance at 2.7 V and 5 V. This range supports direct connection to common battery chemistries (e.g., 3.7 V Li-ion) and regulated 3.3 V or 5 V rails without additional voltage translation - confirmed in Section 5.3 of the TI SLOS447J datasheet.
Does LMV344IDR support true rail-to-rail input?
No, LMV344IDR features rail-to-rail *output* but has a CMOS input stage with common-mode range from –0.2 V to V+ – 1 V. It does *not* support input voltages within 1 V of V+, limiting its use in high-side sensing without external level-shifting - as specified in Table 5-5 and Section 6.3.1 of the LMV344IDR datasheet.
How many independent shutdown controls does LMV344IDR provide?
LMV344IDR provides four independent active-low shutdown pins (pins 5, 6, 9, and 10), one per amplifier channel. Asserting any SHDN pin places only its associated amplifier into high-impedance output and 33 nA quiescent current mode - a feature explicitly documented in Figure 4-3 and Section 6.3.3 of the LMV344IDR datasheet.
What is the typical input offset voltage and its temperature drift for LMV344IDR?
LMV344IDR has a typical input offset voltage of 0.25 mV at 25°C, with a maximum of 4.5 mV over the full –40°C to +125°C range. Its average temperature coefficient is 1.7 μV/°C (at 2.7 V) or 1.9 μV/°C (at 5 V), ensuring predictable, low-drift performance in thermally varying environments - per Sections 5.5 and 5.6 of the official datasheet.
Can LMV344IDR drive a 600 Ω load in audio applications?
LMV344IDR is not optimized for 600 Ω loads: its output short-circuit current is rated at 18–24 mA (sourcing) and 15–24 mA (sinking), and THD+N rises to 0.017% at 1 kHz with 600 Ω load per Section 5.5. For line-driver applications, a dedicated audio op-amp like OPA1611 is recommended - LMV344IDR targets high-impedance sensor buffering and ADC driving instead.
LMV344IDR 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:
- 1 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 107µA (x4 Channels)
- Current - Output / Channel:
- 113 mA
- Voltage - Supply Span (Min):
- 2.5 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
LMV344IDR FAQ
1.How can I place an order for LMV344IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV344IDR 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 LMV344IDR reliable?
The price and inventory of LMV344IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV344IDR is usually 5 days.
3.What payment methods are accepted for LMV344IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV344IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV344IDR?
LMV344IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV344IDR 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 LMV344IDR?
For technical support, including LMV344IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV344IDR requirements.
6.How does Aetrix verify that LMV344IDR is sourced from the original manufacturer or authorized distributors?
All LMV344IDR 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 LMV344IDR meets industry standards.
7.What is the process for return or replacement of LMV344IDR?
All LMV344IDR units undergo pre-shipment inspection (PSI). If there is an issue with LMV344IDR, 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 LMV344IDR part is unused and in its original packaging.
Return procedure for LMV344IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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