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Texas Instruments LMV344IDG4
- Part No.:
- LMV344IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV344IDG4.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
LMV344IDG4 from Texas Instruments is a quad rail-to-rail output CMOS operational amplifier with shutdown capability, designed for low-voltage (2.7V–5.5V) single-supply operation. 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 battery-powered audio preamplifiers and supply-current monitoring circuits.
For engineers reviewing the LMV344IDG4 datasheet, LMV344IDG4 pinout, LMV344IDG4 application, or LMV344IDG4 equivalent, key selection criteria include shutdown current (33 nA typ. at 5V), rail-to-rail output swing (≤30 mV from rails at 10 kΩ load), input common-mode range extending to ground, and guaranteed operation across –40°C to +125°C industrial temperature range.
Technical Context
The LMV344IDG4 integrates four independent CMOS op-amp channels sharing a single V+ and GND, each featuring a PMOS input stage enabling rail-to-rail input down to ground and up to V+ – 1 V, plus a CMOS output stage delivering rail-to-rail output swing. Shutdown control is implemented per-channel via dedicated SHDN pins (pins 5, 10, 9, and 13), allowing selective channel disablement while maintaining high-impedance outputs and sub-100 nA total supply current in full shutdown.
Its unity-gain stable architecture supports capacitive loads up to 1000 pF (per channel), with phase margin ≥70° at 5 V and RL = 100 kΩ. Input-referred voltage noise is 39–40 nV/√Hz at 1 kHz, and THD+N is 0.012% at 1 kHz (5 V, AV = 1, RL = 600 Ω), confirming suitability for low-distortion analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without level-shifting |
| Gain Bandwidth Product | 1 MHz (typ.) - enables stable unity-gain buffering and low-frequency filtering up to ~100 kHz |
| Slew Rate | 1 V/μs (typ.) - sufficient for 100 kHz full-power sine wave output at 6.3 VPP |
| Input Offset Voltage | 0.25 mV (typ.), 4.5 mV (max) - ensures ≤0.1% gain error in 100× amplification of mV-level sensor signals |
| Input Bias Current | 1 pA (typ.), 5 nA (max, –40°C to 125°C) - minimizes voltage drop across high-impedance source networks (e.g., pH electrodes) |
| Shutdown Supply Current | 33 nA (typ. at 5 V), 1.5 μA (max) - enables multi-week battery life in intermittent-sensing applications |
| Output Swing (10 kΩ) | ≤30 mV from rails (typ.) - preserves dynamic range in low-voltage ADC interfaces (e.g., 3.3 V SAR converters) |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor IoT nodes |
Pinout & Package
LMV344IDG4 is packaged in a 14-pin TSSOP (PW) with body size 5.00 mm × 4.40 mm and 0.65 mm lead pitch. The package is RoHS-compliant and rated for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | Output (OUT1–OUT4) | CMOS push-pull outputs capable of rail-to-rail swing; high-impedance during shutdown |
| 2, 6, 9, 13 | Inverting Input (IN–1–IN–4) | PMOS inputs with common-mode range from GND to V+ – 1 V; 1 pA bias current enables high-Z sensor interfacing |
| 3, 5, 10, 12 | Noninverting Input (IN+1–IN+4) | Identical input specs as IN–; supports unity-gain buffer, differential amplification, and active filtering topologies |
| 4 | V+ | Positive supply for all four channels; must be bypassed with 0.1 μF ceramic capacitor near pin |
| 11 | GND | Analog ground reference shared by all channels; requires low-impedance connection to system ground plane |
| 5, 10, 9, 13 | SHDN (1–4) | Active-low shutdown control per channel; <0.2 V = shutdown (ICC ≈ 33 nA), >4.5 V = active (ICC ≈ 200 μA/channel) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range in 3.3 V systems - e.g., 0–3.3 V output drives ADS7953 directly without level shift |
| 1 pA typical input bias current | Permits use with >100 MΩ source impedances (e.g., piezoelectric sensors, photodiode transimpedance stages) without significant offset drift |
| 33 nA shutdown current (5 V) | Supports micro-power wake-on-event architectures - e.g., one channel monitors battery voltage continuously while others remain shut down |
| 125°C maximum operating temperature | Validates use in engine control units, power supply monitoring, and industrial PLC I/O modules without derating |
| ESD robustness (2000 V HBM) | Reduces need for external protection on PCB - suitable for handheld test equipment and field-deployable sensor nodes |
| Unity-gain stable with 1000 pF load | Eliminates need for isolation resistors in capacitive sensor interfaces (e.g., touch panels, humidity sensors) |
Applications
| Battery Monitoring | Audio Preamplifier |
|---|---|
Use Scenario: Real-time monitoring of Li-ion cell voltage during charging/discharging cycles in portable medical devices. IC Role / Device Role / Timing Role: Quad configuration allows simultaneous measurement of 4-cell stack voltage with matched gain/offset across channels. Use Value: 0.25 mV offset and 1 pA bias current ensure ≤1 mV absolute error over full temperature range, meeting IEC 62304 Class C accuracy requirements. | Use Scenario: Low-noise microphone preamplification in voice-controlled smart speakers with always-on listening. IC Role / Device Role / Timing Role: One channel buffers electret mic output; others condition auxiliary sensors (e.g., ambient light, motion). Use Value: 39 nV/√Hz input noise and 0.012% THD+N preserve speech intelligibility at SNR >75 dB, even at 3.3 V supply. |
| Supply-Current Monitoring | Industrial Sensor Interface |
Use Scenario: High-side current sensing in 24 V industrial PLC outputs using shunt-based measurement. IC Role / Device Role / Timing Role: Configured as difference amplifier to reject common-mode voltage while amplifying mV-level shunt drops. Use Value: 80 dB CMRR (typ.) and rail-to-rail output enable accurate 0–20 mA loop current readback with 12-bit resolution. | Use Scenario: Signal conditioning for RTD and thermistor bridges in HVAC control panels operating at 125°C ambient. IC Role / Device Role / Timing Role: Instrumentation-grade front-end with programmable gain and cold-junction compensation support. Use Value: Guaranteed performance from –40°C to +125°C and 1.9 μV/°C max offset drift ensure ±0.1°C temperature accuracy without calibration. |
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, 2.3 V/μs slew rate | Better for higher-speed signal chains (e.g., active filters >100 kHz); unsuitable for battery-critical designs | Select when speed outweighs power; avoid where shutdown or <200 μA/channel is required |
| LPV821QDGKR | Single-channel, 65 fA bias current, 350 kHz GBW, 0.16 V/μs slew rate, 650 nA supply current | Optimized for ultra-high-Z pH/ISE sensors; too slow for audio or fast monitoring loops | Choose only for femtoampere-input applications; not a functional replacement for quad-channel needs |
Compared with TLV2464IDR and LPV821QDGKR, LMV344IDG4 uniquely balances quad-channel integration, 1 MHz bandwidth, rail-to-rail output, and nanowatt shutdown - making it the only option among the three that supports multi-sensor monitoring with autonomous power gating in space-constrained industrial nodes.
Availability
LMV344IDG4 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 lifecycle assurance, and extended temperature qualification.
Supply support for LMV344IDG4 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The LMV34x family was designed for low-voltage, low-power, precision signal conditioning in portable and industrial systems - emphasizing rail-to-rail operation, ultra-low input bias current, and robust shutdown functionality.
FAQ
What is the maximum operating temperature for LMV344IDG4?
The LMV344IDG4 is specified to operate from –40°C to +125°C ambient temperature. This extended industrial temperature range is validated per TI's characterization and testing protocols, ensuring reliable performance in under-hood automotive modules, motor drive feedback circuits, and outdoor environmental sensors. The device maintains its key parameters-including input offset voltage, gain bandwidth, and shutdown current-within datasheet limits across this full range.
Does LMV344IDG4 support true rail-to-rail input?
LMV344IDG4 supports rail-to-rail *output* swing but has a limited rail-to-rail *input* range: the common-mode input voltage extends from GND to V+ – 1 V. This means it accepts signals down to ground (enabling single-supply sensor interfaces) but does not accept inputs at the positive rail. For example, at V+ = 3.3 V, the maximum valid input is 2.3 V. This is due to its PMOS input stage architecture, as confirmed in Section 6.3.1 of the datasheet.
How many independent shutdown controls does LMV344IDG4 have?
LMV344IDG4 provides four independent active-low shutdown inputs - SHDN1 (pin 5), SHDN2 (pin 10), SHDN3 (pin 9), and SHDN4 (pin 13) - one per amplifier channel. Each can be driven separately to disable its respective channel while others remain active. When a SHDN pin is pulled below 0.2 V, its associated amplifier enters shutdown mode with supply current dropping to 33 nA (typ. at 5 V) and output going high-impedance. This per-channel control is explicitly defined in Table 4-3 and Section 6.3.3.
What is the typical input-referred voltage noise of LMV344IDG4 at 1 kHz?
The LMV344IDG4 exhibits 39 nV/√Hz typical input-referred voltage noise at 1 kHz (measured at V+ = 5 V), as specified in Section 5.5 and 5.6 Electrical Characteristics tables. This value is confirmed across both 2.7 V and 5 V supply conditions and remains stable over temperature. At 10 kHz, the noise increases slightly to 20 nV/√Hz - a figure also documented in the Features section and validated in Figure 5-18 of the datasheet.
Can LMV344IDG4 drive a 600 Ω load at full output swing?
LMV344IDG4 is not characterized to drive 600 Ω loads at full rail-to-rail swing. Its output short-circuit current is specified as 85–113 mA (sourcing) and 50–75 mA (sinking) at 5 V, implying a minimum safe load resistance of ~30 Ω for full swing. Driving 600 Ω is feasible for small-signal applications (e.g., line-level audio), but output swing will compress - e.g., at RL = 600 Ω, VO swing degrades to ~2.5 VPP (vs. 3.3 VPP at 10 kΩ). THD+N rises to 0.017% at 1 kHz under those conditions, as shown in Section 5.5.
LMV344IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
LMV344IDG4 FAQ
1.How can I place an order for LMV344IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV344IDG4 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 LMV344IDG4 reliable?
The price and inventory of LMV344IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV344IDG4 is usually 5 days.
3.What payment methods are accepted for LMV344IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV344IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV344IDG4?
LMV344IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV344IDG4 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 LMV344IDG4?
For technical support, including LMV344IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV344IDG4 requirements.
6.How does Aetrix verify that LMV344IDG4 is sourced from the original manufacturer or authorized distributors?
All LMV344IDG4 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 LMV344IDG4 meets industry standards.
7.What is the process for return or replacement of LMV344IDG4?
All LMV344IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with LMV344IDG4, 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 LMV344IDG4 part is unused and in its original packaging.
Return procedure for LMV344IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV344IDG4 Tags
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