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Texas Instruments LMV951MKX/NOPB
- Part No.:
- LMV951MKX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMV951MKX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:2,113
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Product details
Overview
LMV951MKX/NOPB from Texas Instruments is a 1-V rail-to-rail input/output operational amplifier with integrated charge pump, enabling full signal swing at ultra-low supply voltages (0.9 V to 3 V). It delivers 2.7-MHz gain bandwidth, 35 mA sink / 45 mA source output drive, and shutdown current <50 nA - ideal for single-cell alkaline or NiMH battery monitoring circuits.
For engineers reviewing the LMV951MKX/NOPB datasheet, LMV951MKX/NOPB pinout, LMV951MKX/NOPB application, or LMV951MKX/NOPB equivalent, key selection criteria include guaranteed 1-V operation, zero-crossover rail-to-rail input without IB reversal, buffered output stability with ≥1000-pF capacitive load, and −40°C to 125°C temperature range compliance.
Technical Context
The LMV951MKX/NOPB employs an internal 10–15 MHz charge pump to bias its bipolar input stage and CMOS output stage, enabling true rail-to-rail operation down to 0.9 V while maintaining constant input offset voltage and no bias current reversal across the full common-mode range (0 V to V+). Its buffered output architecture decouples open-loop gain from resistive loading.
Shutdown mode places the output in high-impedance state within 3 µs of enable, with input pins tolerant of applied voltages within V− to V+ rails. The device avoids input clamping diodes in comparator use and supports unity-gain stable operation with up to 10,000 pF capacitive loads - verified via phase margin testing across 600 Ω, 2 kΩ, and 10 kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.9 V to 3 V - enables direct interface with single alkaline (1.5 V) or one/two NiMH/NiCd cells (1.2 V/cell) without regulation. |
| Gain Bandwidth Product | 2.7 MHz at 1 V - supports audio-band signal conditioning and fast sensor response in low-power systems. |
| Input Offset Voltage | 1.5–2.8 mV (typ) at 25°C, 1 V supply - ensures accurate DC-coupled amplification in battery voltage sensing. |
| Output Drive Capability | ±35 mA (sink/source) at 1 V - drives 600 Ω loads to within 32 mV of rails, enabling direct interface with analog front-ends. |
| Shutdown Current | <50 nA - reduces system standby power by >4 orders of magnitude versus active mode (380 µA). |
| Input Common-Mode Range | 0 V to V+ (rail-to-rail) - eliminates external level-shifting for ground-referenced sensors and ADC inputs. |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin, industrial battery packs, and medical wearable environments. |
Pinout & Package
LMV951MKX/NOPB is housed in a 6-pin SOT-23 (DDC) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained portable electronics and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUTPUT | Amplifier output node | Buffered CMOS stage provides rail-to-rail swing and stable drive into 1000-pF+ capacitive loads. |
| 2 - V− | Negative supply terminal | Ground reference (0 V typical); supports single-supply operation with V− = GND. |
| 3 - +IN | Noninverting input | Rail-to-rail input stage with no bias current reversal - maintains accuracy across full VCM range. |
| 4 - −IN | Inverting input | Matches +IN characteristics; differential input protection diodes limit VIN(DIFF) to ±0.3 V. |
| 5 - SHUTDOWN | Digital enable control | Active-low logic: <0.4 V = active, >0.65 V = shutdown; output goes high-Z with <50 nA quiescent draw. |
| 6 - V+ | Positive supply terminal | Accepts 0.9–3 V; internal charge pump generates internal bias rails independent of V+. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with zero crossover | Constant input offset and no IB reversal over 0 V to V+ - eliminates distortion in precision DC-coupled paths. |
| Buffered rail-to-rail output | Open-loop gain stable under resistive loading; outputs swing to within 10–32 mV of rails at 1 V supply. |
| Integrated charge pump | 10–15 MHz internal switching enables full functionality at 0.9 V - no external boost circuitry required. |
| Capacitive load drive | Stable in unity gain with ≥1000 pF; phase margin >45° up to 10,000 pF - simplifies sensor cable interfacing. |
| Fast shutdown recovery | Full operation restored in ≤3 µs after SHUTDOWN pin release - suitable for burst-mode sensing applications. |
Applications
| Battery Voltage Monitoring | Low-Power Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Real-time measurement of single-cell alkaline or LiFePO₄ battery voltage during discharge cycles in wearables or IoT edge nodes. IC Role / Device Role / Timing Role: Precision DC amplifier with rail-to-rail input captures full 0–1.5 V range without level shifters; shutdown mode extends battery life between readings. Use Value: Enables accurate state-of-charge estimation at 0.9 V cutoff, reducing BOM cost by eliminating external regulators or op-amp bias networks. |
Use Scenario: Amplifying microvolt-level outputs from thermistors, RTDs, or MEMS pressure sensors in portable medical devices. IC Role / Device Role / Timing Role: Low-noise (25 nV/√Hz), low-drift (0.15 µV/°C) amplifier with rail-to-rail output drives 12-bit SAR ADC inputs directly. Use Value: Maintains signal integrity across −40°C to 125°C ambient without calibration drift, supporting FDA-cleared device requirements. |
| Two-Wire Cable Driver | Supply Current Sensing |
|
Use Scenario: Driving analog sensor signals over long cables (≥10 m) using two-wire twisted pair in building automation or industrial field devices. IC Role / Device Role / Timing Role: Unity-gain stable buffer with 10,000-pF drive capability and robust ESD tolerance (±2 kV HBM) minimizes signal degradation and noise pickup. Use Value: Eliminates need for external snubbers or isolation components, reducing layout area and component count in DIN-rail mounted controllers. |
Use Scenario: High-side current sensing in battery management systems (BMS) for portable power tools or e-bikes operating at 1–3 V. IC Role / Device Role / Timing Role: Differential amplifier with 76 dB CMRR rejects common-mode noise from motor commutation or switching regulators. Use Value: Accurately resolves sub-10-mA load currents at 1 V supply, enabling precise charge/discharge cycle counting and thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-voltage operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Lower GBW (1 MHz), higher supply current (60 µA), no shutdown, 1.8–5.5 V min supply | Lacks ultra-low-voltage operation and shutdown - unsuitable for sub-1.2 V battery monitoring | Select only if system operates ≥1.8 V and shutdown is unnecessary; lower cost but reduced flexibility |
| OPA316IDBVR | Higher GBW (10 MHz), higher supply current (400 µA), no shutdown, 1.8–5.5 V supply | Requires ≥1.8 V - cannot support single alkaline cell (1.5 V nominal, 0.9 V end-of-life) | Choose for higher-speed signal chains where 1-V operation is not required; superior AC performance but incompatible with 0.9 V cutoff |
Compared with TLV9001IDBVR and OPA316IDBVR, LMV951MKX/NOPB uniquely supports guaranteed operation down to 0.9 V with shutdown, making it the only option for true single-cell alkaline or deep-discharge NiMH systems requiring <50 nA standby current and rail-to-rail DC accuracy.
Availability
LMV951MKX/NOPB is available at Aetrix Electronics and suitable for battery-operated systems, battery monitoring, and supply current monitoring requiring stable component supply across automotive, industrial, and medical portable equipment programs.
Supply support for LMV951MKX/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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision amplifiers and low-power signal chain products.
The LMV951MKX/NOPB belongs to TI's ultra-low-voltage operational amplifier product line, engineered specifically for energy-constrained applications where supply voltage may fall below 1 V - such as disposable medical sensors, coin-cell IoT nodes, and multi-cell battery fuel gauging.
FAQ
What is the minimum supply voltage at which LMV951MKX/NOPB guarantees full specification compliance?
The LMV951MKX/NOPB guarantees full electrical specifications at 1 V supply, with functional operation confirmed down to 0.9 V. At 0.9 V, parameters such as gain bandwidth (2.7 MHz), input offset voltage (≤3 mV), and output drive remain valid per TI characterization data - enabling reliable use in deeply discharged single-cell alkaline or NiMH systems where voltage drops below 1 V.
Does LMV951MKX/NOPB require external components to operate at 1-V supply?
No, LMV951MKX/NOPB requires no external components to operate at 1-V supply. Its internal 10–15 MHz charge pump generates necessary bias voltages on-chip, eliminating the need for external boost converters, level shifters, or charge-pump ICs - simplifying design and reducing bill-of-materials for ultra-low-voltage applications.
How does the shutdown feature of LMV951MKX/NOPB affect output state and input tolerance?
During shutdown, the LMV951MKX/NOPB output enters a high-impedance state, and supply current drops below 50 nA. Input pins remain tolerant of voltages within the V− to V+ range - allowing sensor signals to remain connected without damage or leakage path concerns, even when the amplifier is disabled.
Can LMV951MKX/NOPB drive a 1000-pF capacitive load in unity-gain configuration without oscillation?
Yes, LMV951MKX/NOPB is unity-gain stable with ≥1000-pF capacitive loads, as validated by TI's phase margin testing showing >45° margin at 1000 pF across 600 Ω, 2 kΩ, and 10 kΩ loads. This eliminates need for external compensation in sensor cable buffering or ADC driver applications.
What is the input bias current behavior of LMV951MKX/NOPB across its common-mode voltage range?
The LMV951MKX/NOPB features a bipolar input stage that maintains constant input bias current across the full 0 V to V+ common-mode range - with no reversal or discontinuity. Typical IB is 32–80 nA at 25°C and remains stable across −40°C to 125°C, ensuring predictable gain error in precision resistor-based configurations.
LMV951MKX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.4V/µs
- Gain Bandwidth Product:
- 2.8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 36 nA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 570µA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 0.9 V
- Voltage - Supply Span (Max):
- 3 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMV951MKX/NOPB FAQ
1.How can I place an order for LMV951MKX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV951MKX/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 LMV951MKX/NOPB reliable?
The price and inventory of LMV951MKX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV951MKX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV951MKX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV951MKX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV951MKX/NOPB?
LMV951MKX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV951MKX/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 LMV951MKX/NOPB?
For technical support, including LMV951MKX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV951MKX/NOPB requirements.
6.How does Aetrix verify that LMV951MKX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV951MKX/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 LMV951MKX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV951MKX/NOPB?
All LMV951MKX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV951MKX/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 LMV951MKX/NOPB part is unused and in its original packaging.
Return procedure for LMV951MKX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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