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Texas Instruments LMV844QMAX/NOPB
- Part No.:
- LMV844QMAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV844QMAX/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,217
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Product details
Overview
LMV844QMAX/NOPB from Texas Instruments is a quad-channel, CMOS-input, rail-to-rail input/output (RRIO) operational amplifier optimized for high-impedance sensor interface and battery-powered instrumentation. It operates from 2.7 V to 12 V, delivers 4.5 MHz unity-gain bandwidth, draws only 1 mA per channel, and features 500 µV max input offset voltage and 0.3 pA input bias current - enabling precision signal conditioning in space-constrained industrial and portable systems.
For engineers reviewing the LMV844QMAX/NOPB datasheet, LMV844QMAX/NOPB pinout, LMV844QMAX/NOPB application, or LMV844QMAX/NOPB equivalent, key selection criteria include its guaranteed RRIO performance at 3.3 V/5 V/±5 V, −40°C to +125°C temperature range, low 20 nV/√Hz input voltage noise, and compatibility with high-gain active filters and DAC buffers requiring minimal loading of high-Z sources.
Technical Context
The LMV844QMAX/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and supports single-supply (2.7–12 V) or split-supply (±5 V) operation. Its fully differential input architecture achieves 112 dB CMRR and 108 dB PSRR, while rail-to-rail output swing enables full dynamic range utilization down to 33 mV from rails (at 10 kΩ load, 5 V supply).
Designed for stability with capacitive loads up to 100 pF, it maintains 67° phase margin and exhibits predictable slew rate (2.5 V/µs) and gain-bandwidth product (4.5 MHz) across supply voltages and temperatures - critical for active filter design, instrumentation amplifiers, and precision buffering where gain accuracy and settling behavior must be preserved over wide operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports direct interfacing with Li-ion, 3.3 V logic, and 5 V microcontrollers without level-shifting. |
| Unity-Gain Bandwidth | 4.5 MHz - enables stable closed-loop operation up to ~300 kHz in gain-of-10 configurations for sensor signal conditioning. |
| Input Offset Voltage (max) | 500 µV - ensures ≤0.01% gain error in 5 V full-scale instrumentation amplifier front-ends. |
| Input Bias Current (typ) | 0.3 pA - prevents measurable voltage drop across >1 GΩ sensor sources (e.g., piezoelectric, pH electrodes). |
| Output Swing (RL = 10 kΩ) | Within 32 mV of rails (high) and 33 mV (low) at 5 V - preserves >98% of available dynamic range for ADC input drivers. |
| Input Voltage Noise | 20 nV/√Hz at 1 kHz - dominates total noise in <100 kHz bandwidth applications, limiting resolution in µV-level sensor signals. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial PLC, and outdoor IoT sensor nodes. |
Pinout & Package
LMV844QMAX/NOPB is housed in a 14-pin SOIC package (8.65 mm × 3.91 mm), optimized for automated assembly and thermal reliability in high-density PCB layouts. The package supports JEDEC-standard reflow profiles and provides adequate thermal dissipation (RθJA = 121.4°C/W) for four independent amplifiers operating at 1 mA each.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 11 | Inverting Input (−IN) | Four independent negative inputs; accept feedback networks for inverting configurations or sensor bridge legs. |
| 2, 4, 6, 12 | Noninverting Input (+IN) | Four independent positive inputs; directly interface high-impedance sensors without loading error. |
| 7, 8, 9, 10 | Output (OUT) | Four buffered outputs; rail-to-rail swing allows full utilization of 12-bit+ ADC reference ranges. |
| 13 | Positive Supply (V+) | Common power rail for all four amplifiers; decoupling required within 1 cm for stability. |
| 4 | Negative Supply (V−) | Ground or negative rail; shared across all channels; requires low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input and Output (RRIO) | Enables operation with input common-mode range extending 100 mV beyond rails and output swing within 32 mV of rails - critical for single-supply data acquisition systems. |
| CMOS Input Stage | Delivers 0.3 pA typical input bias current, eliminating offset drift from leakage in high-Z transducer interfaces (e.g., thermopiles, photodiodes). |
| Low Power Consumption | 1 mA per channel at 5 V allows four amplifiers to operate continuously on a 200 mAh coin cell for >20 days - ideal for wireless sensor nodes. |
| Wide Supply Range | 2.7 V to 12 V operation eliminates need for dedicated op-amp supplies in mixed-voltage systems (e.g., 3.3 V MCU + 12 V actuator control). |
| High Precision DC Performance | 500 µV max VOS, 0.25 µV/°C max TCVOS, and 133 dB open-loop gain ensure stable gain accuracy in closed-loop configurations over temperature. |
Applications
| High-Impedance Sensor Interface | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying output of a 10 GΩ pH electrode in a handheld water quality meter powered by two AA cells. IC Role / Device Role / Timing Role: Quad amplifier configured as three-stage instrumentation amplifier (INA) with guard drive, plus reference buffer. Use Value: 0.3 pA input bias current prevents >30 mV offset error; RRIO output drives 12-bit SAR ADC directly without level-shifting. |
Use Scenario: Signal conditioning for a portable gas detector using electrochemical sensors with µA-level output currents. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) + filter + ADC driver in ultra-low-power duty-cycled measurement cycle. Use Value: 1 mA/channel supply current extends battery life; 4.5 MHz GBW supports fast settling after wake-up from sleep mode. |
| High-Gain Instrumentation Amplifiers | DAC Buffers and Active Filters |
Use Scenario: Front-end gain stage for a medical ECG monitor requiring 1000× differential gain and <1 µV input-referred noise. IC Role / Device Role / Timing Role: First-stage preamplifier in 3-op-amp INA topology, leveraging low VOS and high CMRR. Use Value: 112 dB CMRR rejects 50/60 Hz mains interference; 20 nV/√Hz noise contributes minimally to system noise floor. |
Use Scenario: Buffering 16-bit DAC output driving a 4-pole Sallen-Key band-pass filter for audio tone generation. IC Role / Device Role / Timing Role: Unity-gain buffer isolating DAC from filter input capacitance and providing low-Z drive. Use Value: RRIO output ensures full DAC code utilization; 4.5 MHz GBW supports filter cutoff frequencies up to 200 kHz with <0.1 dB passband ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV844IDR | Same electrical specs and pinout; SOIC-14 package without lead-free/NOPB marking; RoHS-compliant but not Pb-free exempt. | Identical functional use; selected when exemption from Pb-free requirements is not needed. | Preferred for cost-sensitive industrial designs where Pb-free exemption is unnecessary. |
| MCP6004-E/SL | Lower GBW (1 MHz), higher VOS (1.5 mV max), wider supply range (1.8–6.0 V); no specified 125°C operation. | Suitable for lower-speed, lower-precision consumer applications; not recommended for automotive or extended-temp industrial use. | Consider only for 3.3 V battery-powered devices where bandwidth and precision demands are relaxed. |
Compared with LMV844QMAX/NOPB, LMV844IDR offers identical performance with standard RoHS compliance, while MCP6004-E/SL trades bandwidth, offset, and temperature range for lower cost and supply voltage flexibility - making LMV844QMAX/NOPB the sole choice for high-precision, high-temp, RRIO quad op-amp requirements.
Availability
LMV844QMAX/NOPB is available at Aetrix Electronics and suitable for high-impedance sensor interface, battery-powered instrumentation, and high-gain instrumentation amplifier designs requiring stable component supply across automotive, industrial, and medical end equipment.
Supply support for LMV844QMAX/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 signal chain solutions.
The LMV84x family was designed specifically for low-power, high-precision signal conditioning in portable and harsh-environment applications - combining CMOS input integrity, rail-to-rail operation, and extended temperature capability in compact packages.
FAQ
What is the maximum supply voltage for LMV844QMAX/NOPB?
The absolute maximum supply voltage (V+ – V−) for LMV844QMAX/NOPB is 13.2 V, but the recommended operating range is 2.7 V to 12 V. Operation above 12 V risks exceeding internal junction temperature limits and may degrade long-term reliability - always refer to the Thermal Information section (RθJA = 121.4°C/W) and derate accordingly for ambient temperatures above 85°C.
Does LMV844QMAX/NOPB support true rail-to-rail input at 12 V supply?
Yes, LMV844QMAX/NOPB supports rail-to-rail input with common-mode voltage range extending to V− – 0.1 V and V+ + 0.2 V at 12 V supply (per Electrical Characteristics table), enabling direct connection to sensors operating at supply rails - critical for single-supply systems where sensor outputs swing near ground or VCC.
Can LMV844QMAX/NOPB drive a 100 pF capacitive load stably?
Yes, LMV844QMAX/NOPB is characterized for stable operation with capacitive loads up to 100 pF (see Figure 20, Phase Margin vs CL), maintaining ≥45° phase margin at 5 V supply. For loads >100 pF, external isolation resistance (e.g., 10 Ω in series with output) is recommended to prevent peaking or oscillation in closed-loop configurations.
What is the input bias current specification of LMV844QMAX/NOPB at 85°C?
At 85°C, LMV844QMAX/NOPB exhibits ≤300 pA input bias current (per Electrical Characteristics tables), remaining three orders of magnitude lower than bipolar-input op-amps - ensuring negligible voltage error across high-value feedback resistors (e.g., 10 MΩ) used in transimpedance amplifiers for photodiode sensing.
Is LMV844QMAX/NOPB pin-compatible with other LMV84x variants?
No - LMV844QMAX/NOPB (14-pin SOIC) is not pin-compatible with LMV841 (5-pin SC70) or LMV842 (8-pin VSSOP/SOIC). However, its pinout matches LMV844IDR and LMV844IPW (TSSOP-14) for channel assignment and power terminals, enabling drop-in replacement within the quad variant family when package constraints allow.
LMV844QMAX/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:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- 4.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 1.03mA (x4 Channels)
- Current - Output / Channel:
- 37 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMV844QMAX/NOPB FAQ
1.How can I place an order for LMV844QMAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV844QMAX/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 LMV844QMAX/NOPB reliable?
The price and inventory of LMV844QMAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV844QMAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV844QMAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV844QMAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV844QMAX/NOPB?
LMV844QMAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV844QMAX/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 LMV844QMAX/NOPB?
For technical support, including LMV844QMAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV844QMAX/NOPB requirements.
6.How does Aetrix verify that LMV844QMAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV844QMAX/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 LMV844QMAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV844QMAX/NOPB?
All LMV844QMAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV844QMAX/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 LMV844QMAX/NOPB part is unused and in its original packaging.
Return procedure for LMV844QMAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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