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Texas Instruments LMV641MAX/NOPB
- Part No.:
- LMV641MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV641MAX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
LMV641MAX/NOPB from Texas Instruments is a low-power, rail-to-rail output operational amplifier optimized for battery-powered and portable systems. It delivers 10 MHz unity-gain bandwidth, 138 µA supply current, 500 µV max input offset voltage, 120 dB CMRR, and operates from 2.7 V to 12 V single or ±5 V dual supplies - enabling precision signal conditioning in space-constrained sensor front-ends.
For engineers reviewing the LMV641MAX/NOPB datasheet, LMV641MAX/NOPB pinout, LMV641MAX/NOPB application, or LMV641MAX/NOPB equivalent, key selection criteria include its ultra-low quiescent current at wide supply range, rail-to-rail output swing within 40 mV of rails (at 2 kΩ), 14 nV/√Hz input voltage noise, and guaranteed −40°C to +125°C operation - critical for portable instrumentation and industrial sensing designs.
Technical Context
The LMV641MAX/NOPB employs a unity-gain-stable transconductance architecture with internal compensation optimized for 10 MHz GBW at 138 µA. Its input stage supports common-mode voltage down to the negative rail, enabling ground-sensing in single-supply configurations. The rail-to-rail output uses complementary push-pull circuitry delivering 22 mA sourcing and 25 mA sinking capability into 2 kΩ loads.
Stability is maintained up to 100 pF capacitive load without external compensation; beyond that, in-loop RC compensation (e.g., series RISO or feedback CF) is required to preserve phase margin. Thermal performance is characterized across SOIC-8 (RθJA = 166°C/W), SOT-23-5 (325°C/W), and SC70-5 (456°C/W) packages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V single supply or ±5 V dual supply - supports direct interface with Li-ion, 3.3 V, and 5 V systems without level-shifting. |
| Unity-Gain Bandwidth | 10 MHz - enables stable amplification of audio-band and low-MHz sensor signals (e.g., piezoelectric, strain gauge) with minimal phase lag. |
| Supply Current | 138 µA typical at 2.7 V - extends battery life in always-on monitoring nodes; increases to 190 µA at 10 V but remains sub-200 µA across full range. |
| Input Offset Voltage | Max 500 µV at 25°C - ensures ≤0.5 mV DC error in 10× gain sensor amplifiers without trimming. |
| CMRR / PSRR | 120 dB CMRR, 105 dB PSRR - rejects power rail noise and common-mode interference in noisy embedded environments. |
| Output Swing | 40 mV from rail (high/low) at 2 kΩ load - maximizes dynamic range in 3.3 V ADC interfaces, preserving >97% of full-scale resolution. |
| Voltage Noise Density | 14 nV/√Hz at 1 kHz - outperforms typical micropower op amps by 3–5×, critical for low-level thermocouple or bridge sensor amplification. |
Pinout & Package
LMV641MAX/NOPB is supplied in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with standard industry pinout and JEDEC-compliant thermal characteristics (RθJA = 166°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (VIN−) | Differential input node; high-impedance (90 nA bias current) for feedback network connection in inverting configurations. |
| 2 | Negative Supply (V−) | Ground reference for single-supply operation or −5 V rail in dual-supply systems; supports rail-to-rail input common-mode down to this pin. |
| 3 | Noninverting Input (VIN+) | High-impedance input for sensor reference or signal source; accepts voltages from V− to V+ − 0.7 V. |
| 4 | Positive Supply (V+) | Primary power rail; must be decoupled with ≥0.1 µF ceramic capacitor placed ≤2 mm from pin to minimize supply-induced noise. |
| 5 | Output (VOUT) | Rail-to-rail output capable of sourcing 22 mA/sinking 25 mA into 2 kΩ; requires external isolation resistor for >100 pF capacitive loads. |
| 6 | No Connect (N/C) | Internally unused; must be left floating or tied to GND per layout best practice to reduce parasitic coupling. |
| 7 | No Connect (N/C) | Internally unused; same handling as Pin 6 - no routing or soldering required. |
| 8 | No Connect (N/C) | Internally unused; electrically isolated; PCB pad may be omitted or grounded for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers 40 mV from supply rails at 2 kΩ load - enables full utilization of 3.3 V ADCs without level-shifting circuitry. |
| Ground-sensing input | Common-mode input range includes V− - allows direct connection of 0 V-referenced sensors (e.g., thermistors, current shunts) in single-supply systems. |
| 1/f noise corner at 4 Hz | Enables stable DC-coupled amplification of slow-varying signals (e.g., temperature, pressure) with minimal low-frequency drift. |
| 10 MHz bandwidth at 138 µA | Best-in-class bandwidth-to-power ratio - supports 100 kHz closed-loop filters while consuming <0.7 mW at 5 V. |
| −40°C to +125°C operation | Qualified for automotive under-hood, industrial PLC, and outdoor IoT sensor nodes without derating. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or pulse oximetry signals in handheld diagnostic devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-noise, DC-coupled front-end amplifier with rail-to-rail output driving 12-bit SAR ADCs. Use Value: 14 nV/√Hz noise and 4 Hz 1/f corner preserve signal integrity below 10 Hz; 138 µA current extends battery life to >1 year in intermittent-read mode. | Use Scenario: Conditioning analog outputs from environmental sensors (temperature, humidity, CO₂) in solar-charged remote monitoring units. IC Role / Device Role / Timing Role: Precision buffer and gain stage interfacing resistive/capacitive sensors to low-power microcontrollers with integrated ADCs. Use Value: 500 µV max VOS and 120 dB CMRR ensure <±0.1% measurement accuracy despite varying supply and ambient noise. |
| Industrial Process Transmitters | Automotive Cabin Sensors |
Use Scenario: Signal conditioning for 4–20 mA loop-powered pressure and flow transmitters operating in factory-floor environments. IC Role / Device Role / Timing Role: High-PSRR (105 dB) amplifier rejecting supply ripple and EMI in 2-wire loop interfaces. Use Value: Stable operation from 2.7 V to 12 V accommodates wide loop voltage drop; 125°C rating supports uncooled enclosures near motors or valves. | Use Scenario: Occupancy detection via infrared PIR sensors and cabin air quality monitoring using electrochemical gas sensors. IC Role / Device Role / Timing Role: Low-quiescent-current amplifier for analog front-end signal chain in always-on vehicle subsystems. Use Value: Sub-200 µA supply current minimizes parasitic drain on 12 V battery during vehicle sleep mode; −40°C to +125°C qualification meets AEC-Q100 Grade 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | Lower bandwidth (1 MHz), higher VOS (1.5 mV max), same 138 µA IQ, SC70-5 only | Not suitable for >100 kHz signal paths or precision DC measurements requiring <1 mV error | Select when cost sensitivity outweighs bandwidth/noise needs and SOIC-8 footprint is not required. |
| TLV9001IDBVR | Higher bandwidth (1 MHz → 1 MHz), lower VOS (0.25 mV max), 150 µA IQ, rail-to-rail I/O, SOT-23-5 | Superior DC precision but 3× lower bandwidth limits AC-coupled sensor use above 100 kHz | Prefer for ultra-low-offset, low-frequency applications (e.g., pH meters); avoid where 10 MHz GBW is essential. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV641MAX/NOPB uniquely balances 10 MHz bandwidth, 138 µA quiescent current, and rail-to-rail output in an SOIC-8 package - making it optimal for portable instrumentation requiring both speed and battery efficiency without sacrificing output drive or thermal robustness.
Availability
LMV641MAX/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV641MAX/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, embedded processing, and connectivity technologies with over 50 years of innovation in precision amplifiers and low-power signal chains.
The LMV641MAX/NOPB belongs to TI's precision, low-power op amp portfolio designed specifically for energy-constrained, high-accuracy sensing applications in portable, industrial, and automotive systems - emphasizing bandwidth-efficiency trade-off optimization.
FAQ
What is the maximum capacitive load the LMV641MAX/NOPB can drive without external compensation?
The LMV641MAX/NOPB remains stable with capacitive loads up to 100 pF when configured in unity-gain or non-inverting configurations. Beyond 100 pF, external compensation (e.g., series output resistor or feedback capacitor) is required to maintain phase margin. Datasheet Figure 13–14 confirms stability degradation above this threshold, and Table 1 provides recommended RS/CF values for 0.5–1.5 nF loads. For LMV641MAX/NOPB, exceeding 100 pF un-compensated risks oscillation or excessive ringing in time-domain response.
Does the LMV641MAX/NOPB support true single-supply operation with input signals at ground potential?
Yes. The LMV641MAX/NOPB features a common-mode input voltage range extending to the negative supply rail (V−), enabling direct connection of 0 V-referenced sensors such as current shunts, thermistors, or bridge circuits in single-supply configurations. This ground-sensing capability is explicitly verified across −40°C to +125°C and at all supply voltages from 2.7 V to 12 V. For LMV641MAX/NOPB, no level-shifting or biasing network is needed to interface with ground-referenced sources.
What is the output voltage swing specification for LMV641MAX/NOPB at 3.3 V supply?
At V+ = 3.3 V and V− = 0 V, the LMV641MAX/NOPB delivers a minimum output swing of 42 mV from the positive rail and 38 mV from the negative rail into a 2 kΩ load (per Section 6.5, VO parameters). This yields >3.2 V of usable output range - sufficient to fully drive 3.3 V ADCs with minimal headroom loss. These values are production-tested at 25°C and derated to 68 mV/58 mV at temperature extremes, ensuring reliable performance across the full −40°C to +125°C range for LMV641MAX/NOPB.
How does the input voltage noise of LMV641MAX/NOPB compare to other micropower op amps?
The LMV641MAX/NOPB specifies 14 nV/√Hz input voltage noise density at 1 kHz - significantly lower than typical micropower op amps (e.g., MCP6001: 29 nV/√Hz; TLV2461: 28 nV/√Hz). Its 4 Hz 1/f corner further reduces low-frequency noise, making it suitable for DC-coupled, sub-10 Hz sensor applications. This noise performance is achieved without increasing supply current beyond 138 µA - a key differentiator confirmed in TI's SNOSAW3D datasheet for LMV641MAX/NOPB.
Is LMV641MAX/NOPB pin-compatible with other op amps in the LMV64x family?
No. The LMV641MAX/NOPB is a single-channel SOIC-8 device. The LMV642 (dual) and LMV644 (quad) variants use MSOP-8 and TSSOP-14 packages respectively - differing in pin count, pinout, and thermal characteristics. While electrical specifications are closely matched across the LMV64x family, LMV641MAX/NOPB has no pin-compatible drop-in replacements. Board layout must be designed specifically for its SOIC-8 footprint and 8-pin configuration, as defined in the LMV641MAX/NOPB datasheet Pin Functions table.
LMV641MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.6V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 158µA
- Current - Output / Channel:
- 112 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:
- 8-SOIC
LMV641MAX/NOPB FAQ
1.How can I place an order for LMV641MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV641MAX/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 LMV641MAX/NOPB reliable?
The price and inventory of LMV641MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV641MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV641MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV641MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV641MAX/NOPB?
LMV641MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV641MAX/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 LMV641MAX/NOPB?
For technical support, including LMV641MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV641MAX/NOPB requirements.
6.How does Aetrix verify that LMV641MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV641MAX/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 LMV641MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV641MAX/NOPB?
All LMV641MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV641MAX/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 LMV641MAX/NOPB part is unused and in its original packaging.
Return procedure for LMV641MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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