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Texas Instruments LMV844MT/NOPB
- Part No.:
- LMV844MT/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMV844MT/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:251
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Product details
Overview
LMV844MT/NOPB from Texas Instruments is a quad CMOS-input, rail-to-rail input/output (RRIO), low-power 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, 133 dB open-loop gain, and 0.3 pA input bias current - enabling precision signal conditioning in space-constrained PCBs.
For engineers reviewing the LMV844MT/NOPB datasheet, LMV844MT/NOPB pinout, LMV844MT/NOPB application, or LMV844MT/NOPB equivalent, key selection criteria include its 14-pin SOIC package, −40°C to +125°C operating range, rail-to-rail swing within 33 mV of rails (at 10 kΩ load), low 1 mA per channel supply current, and CMOS input stage supporting high-impedance source coupling without loading error.
Technical Context
The LMV844MT/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and features internal compensation for stable unity-gain operation. Its RRIO architecture supports full dynamic range utilization across single-supply and split-supply configurations (e.g., 3.3 V, 5 V, ±5 V).
Designed for precision DC-coupled amplification, it achieves 500 µV max input offset voltage, 0.25 µV/°C max offset drift (±5 V), and 112 dB CMRR at DC - making it suitable for high-gain transducer interfaces where common-mode rejection and thermal stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports direct integration into 3.3 V microcontroller systems and 5 V industrial rails without level-shifting. |
| Unity-Gain Bandwidth | 4.5 MHz - enables stable amplification of audio-band and fast-sensor signals (e.g., piezoelectric, strain gauge) up to ~200 kHz closed-loop. |
| Input Bias Current | 0.3 pA typical - preserves signal integrity from ultra-high-impedance sources (>1 GΩ), such as pH electrodes or capacitive sensors. |
| Input Offset Voltage | ±500 µV maximum - ensures <0.1% gain error in 100× instrumentation amplifier stages with 5 V output span. |
| Output Swing (RL = 10 kΩ) | Within 28–50 mV of V+ and 33–65 mV of V− - delivers >98% usable output range in single-supply 3.3 V or 5 V systems. |
| Supply Current per Channel | 0.93–1.03 mA (3.3–±5 V) - allows four independent channels to operate below 4.2 mA total, extending battery life in portable diagnostics. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive sensor front-ends and industrial process monitoring environments. |
Pinout & Package
LMV844MT/NOPB is housed in a 14-pin SOIC package (8.65 mm × 3.91 mm), optimized for automated assembly and thermal reliability on standard FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8, 12 | Inverting Input (−IN) | Four independent negative inputs - each accepts differential feedback for inverting gain configurations or reference-setting in active filters. |
| 2, 6, 9, 13 | Noninverting Input (+IN) | Four independent positive inputs - directly interfaces high-Z sensors (e.g., thermopiles, photodiodes) with minimal loading. |
| 3, 7, 10, 14 | Output (OUT) | Four buffered outputs - each drives ≥2 kΩ loads while maintaining rail-to-rail swing and <0.006% THD+N at 1 kHz. |
| 4 | Negative Supply (V−) | Common ground or negative rail - supports single-supply (0 V) or dual-supply (e.g., −5 V) operation; tied to PCB ground plane for noise immunity. |
| 11 | Positive Supply (V+) | Primary power rail - decoupling capacitor (0.1 µF ceramic) required within 5 mm to suppress supply-induced oscillation at 4.5 MHz GBW. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS Input Stage | 0.3 pA input bias current enables direct connection to >1 GΩ impedance sources without calibration drift or signal attenuation. |
| Rail-to-Rail Input/Output | Full input common-mode range (−0.2 V to 5.2 V at 5 V supply) and output swing within 28 mV of rails preserve dynamic range in low-voltage systems. |
| Low Input Voltage Noise | 20 nV/√Hz at 1 kHz - maintains SNR >86 dB in 100× gain sensor amplifiers with 10 kHz bandwidth. |
| High DC Precision | 133 dB open-loop gain and 112 dB CMRR ensure <1 µV error contribution from power supply ripple or common-mode interference. |
| Wide Temperature Stability | 0.25 µV/°C max offset drift (±5 V) limits total offset shift to <30 µV over −40°C to +125°C - suitable for uncalibrated field deployments. |
Applications
| Medical Patient Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying low-level biopotential signals (ECG, EEG) from dry electrodes with high series impedance (>10 MΩ). IC Role / Device Role / Timing Role: First-stage instrumentation amplifier buffer with CMOS input preventing electrode polarization and preserving DC accuracy. Use Value: 0.3 pA bias current avoids baseline drift; rail-to-rail output maximizes ADC utilization in 3.3 V portable monitors. |
Use Scenario: Conditioning output from MEMS pressure sensors in HVAC control units operating across −25°C to 70°C ambient. IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage converting mV-level sensor output to 0–3.3 V ratiometric signal for MCU ADC. Use Value: 500 µV max VOS and 0.35 µV/°C drift ensure <0.05% FS error over temperature without recalibration. |
| Battery-Powered Test Equipment | Automotive Cabin Air Quality Sensors |
|
Use Scenario: Portable multimeter front-end amplifying nanoamp leakage currents and microvolt thermocouple outputs. IC Role / Device Role / Timing Role: Dual-role amplifier: low-noise transimpedance stage for current measurement and precision buffer for thermocouple cold-junction compensation. Use Value: 4.5 MHz GBW supports fast settling (<1 µs) during auto-ranging; 1 mA/channel supply current extends 200-hour battery life. |
Use Scenario: CO₂ and VOC sensor analog front-end in automotive cabin air recirculation modules requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: High-reliability signal conditioner interfacing NDIR detector outputs with vehicle CAN controller ADC inputs. Use Value: −40°C to +125°C rating meets under-dash thermal requirements; 121.4 °C/W θJA (SOIC) enables passive cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9064IDR | Higher 10 MHz GBW, 0.55 pA IB, but 2.5 mA/channel supply current - 2.5× higher quiescent power than LMV844MT/NOPB. | Better for wideband active filters; less suitable for multi-channel, battery-limited systems requiring sub-4 mA total draw. | Select TLV9064IDR when bandwidth >5 MHz is mandatory and power budget allows ≥2.5 mA/channel. |
| OPA2333P | Zero-drift architecture, 0.02 µV/°C drift, but 17 µV max VOS and 1.2 mA/channel - higher initial offset, lower drift than LMV844MT/NOPB. | Preferred for DC-critical applications like precision weigh scales; LMV844MT/NOPB better for cost-sensitive, moderate-precision sensor interfaces. | Choose OPA2333P only if sub-1 µV/°C drift is required and system calibration overhead is acceptable. |
Compared with TLV9064IDR and OPA2333P, LMV844MT/NOPB offers the optimal balance of ultra-low input bias current (0.3 pA), 4.5 MHz bandwidth, and 1 mA/channel power - making it uniquely suited for multi-channel, high-impedance, battery-operated sensor nodes where precision, size, and efficiency are jointly constrained.
Availability
LMV844MT/NOPB is available at Aetrix Electronics and suitable for medical patient monitoring, industrial sensor signal conditioning, battery-powered test equipment, and automotive cabin air quality sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV844MT/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 op amps and sensor interface solutions.
The LMV84x family was designed specifically for high-impedance, low-power, wide-supply sensor front-ends - targeting portable instrumentation, automotive subsystems, and industrial IoT edge nodes where rail-to-rail performance and thermal robustness are essential.
FAQ
What is the maximum supply voltage for LMV844MT/NOPB?
The absolute maximum supply voltage (V+ – V−) for LMV844MT/NOPB is 13.2 V, but the recommended operating range is 2.7 V to 12 V. Operation at 12 V is fully specified across −40°C to +125°C, delivering 4.5 MHz bandwidth and rail-to-rail output swing within 75 mV of rails (RL = 2 kΩ). Exceeding 13.2 V risks permanent damage.
Does LMV844MT/NOPB support single-supply operation?
Yes, LMV844MT/NOPB supports true single-supply operation down to 2.7 V with rail-to-rail input and output. At 3.3 V supply, its input common-mode range extends from −0.1 V to 3.4 V, and output swings within 28 mV of V+ and 33 mV of V− (RL = 10 kΩ), enabling direct interfacing with 3.3 V ADCs without level-shifting circuitry.
What is the input bias current specification for LMV844MT/NOPB?
LMV844MT/NOPB has a typical input bias current of 0.3 pA at 25°C, with a maximum of 10 pA across −40°C to +125°C. This ultra-low value is enabled by its CMOS input stage and makes LMV844MT/NOPB ideal for interfacing with high-impedance sources such as pH probes, photodiodes, and piezoelectric sensors where leakage current would otherwise dominate signal error.
Can LMV844MT/NOPB drive capacitive loads?
LMV844MT/NOPB is unity-gain stable but exhibits increasing overshoot with capacitive loads >100 pF. The datasheet specifies phase margin degradation above 50 pF and recommends limiting CL to ≤20 pF for optimal step response. For larger loads, external isolation resistors (e.g., 10–50 Ω in series with output) restore stability without compromising DC accuracy.
Is LMV844MT/NOPB RoHS-compliant and lead-free?
Yes, LMV844MT/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix in its part number. Texas Instruments certifies this device to meet EU Directive 2011/65/EU and JEDEC J-STD-609 Category 3 moisture sensitivity level (MSL-3), with peak reflow temperature tolerance up to 260°C for 10 seconds.
LMV844MT/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:
- 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:
- 4 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LMV844MT/NOPB FAQ
1.How can I place an order for LMV844MT/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV844MT/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 LMV844MT/NOPB reliable?
The price and inventory of LMV844MT/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV844MT/NOPB is usually 5 days.
3.What payment methods are accepted for LMV844MT/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV844MT/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV844MT/NOPB?
LMV844MT/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV844MT/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 LMV844MT/NOPB?
For technical support, including LMV844MT/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV844MT/NOPB requirements.
6.How does Aetrix verify that LMV844MT/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV844MT/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 LMV844MT/NOPB meets industry standards.
7.What is the process for return or replacement of LMV844MT/NOPB?
All LMV844MT/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV844MT/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 LMV844MT/NOPB part is unused and in its original packaging.
Return procedure for LMV844MT/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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