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Texas Instruments LMV551MGX/NOPB
- Part No.:
- LMV551MGX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV551MGX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,517
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Product details
Overview
LMV551MGX/NOPB from Texas Instruments is a single-channel, rail-to-rail output, micropower operational amplifier optimized for ultra-low-power signal conditioning in space-constrained systems. It delivers 3 MHz unity-gain bandwidth, 37 µA supply current per amplifier, and 93 dB CMRR at 5 V, enabling precision sensor interfacing and active filtering in battery-powered automotive and portable instrumentation.
For engineers reviewing the LMV551MGX/NOPB datasheet, LMV551MGX/NOPB pinout, LMV551MGX/NOPB application, or LMV551MGX/NOPB equivalent, key selection criteria include its −40°C to +125°C operating range, 2.7–5.5 V supply flexibility, 70 mV rail-to-rail output swing (100 kΩ load), and SC70-5/SOT-23-5 package compatibility with high-density PCB layouts.
Technical Context
The LMV551MGX/NOPB employs TI's VIP50 process to achieve exceptional bandwidth-to-power efficiency: 3 MHz gain-bandwidth product with only 37 µA quiescent current. Its input stage extends below ground, supporting true single-supply operation down to 2.7 V, while the rail-to-rail output delivers >95% of full-scale swing under light loads.
Stability is ensured at unity gain across the full temperature range, but capacitive loading >100 pF requires external compensation-either via isolation resistor (RISO = 5–50 Ω) or in-loop RC feedback-to maintain ≥40° phase margin. Input-referred voltage noise is flat at 70 nV/√Hz (1 kHz to 100 kHz), with a low 4 Hz 1/f corner.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without level-shifting. |
| Unity-Gain Bandwidth | 3 MHz - enables stable amplification of audio-band and low-speed sensor signals up to ~300 kHz closed-loop. |
| Quiescent Current | 37 µA per amplifier - allows continuous operation for years on coin-cell batteries in always-on monitoring nodes. |
| Input Offset Voltage | 1–3 mV (typ) - ensures <0.1% error in 12-bit ADC front-ends with gain ≤100. |
| CMRR / PSRR | 93 dB / 90 dB - rejects common-mode noise from shared power rails and suppresses supply ripple in noisy environments. |
| Rail-to-Rail Output Swing | 70 mV from rail (100 kΩ load, 5 V) - maximizes dynamic range for ADCs with 0–5 V or 0–3.3 V input spans. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial control, and extended-range portable equipment. |
Pinout & Package
LMV551MGX/NOPB is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm) or SOT-23 (2.90 mm × 1.60 mm) footprint - both compatible with standard pick-and-place and reflow processes. The SC70 variant offers superior thermal resistance (RθJA = 303.5°C/W) for compact, low-power designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +IN | Noninverting Input | Accepts reference or sensor signal; common-mode range includes V− (ground in single-supply). |
| 2: V− | Negative Supply | Ground reference for single-supply operation; must be connected directly to system GND plane. |
| 3: −IN | Inverting Input | Feedback node for closed-loop configurations; high impedance (>100 GΩ) minimizes loading on source. |
| 4: OUT | Output | Rail-to-rail voltage source capable of sourcing/sinking ±10 mA; requires external RISO for >100 pF loads. |
| 5: V+ | Positive Supply | Primary power input (2.7–5.5 V); decoupling capacitor (0.1 µF ceramic) required within 2 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 37 µA per amplifier enables multi-year battery life in wireless sensor nodes and wearables. |
| Rail-to-rail output stage | Delivers 4.93 V swing on 5 V supply (70 mV from rail), preserving full ADC resolution without gain compression. |
| Ground-sensing input | Input common-mode range extends to V−, allowing direct interface with 0 V-referenced sensors (e.g., thermistors, bridge outputs). |
| Low 1/f noise corner | 4 Hz corner frequency ensures minimal drift in DC-coupled applications like precision weigh scales and medical ECG front-ends. |
| Unity-gain stable | No external compensation required for gains ≥1, simplifying design of buffers, followers, and active filters. |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: Signal conditioning for MEMS-based cabin pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Single-supply buffer and gain stage driving 12-bit SAR ADC inputs. Use Value: 37 µA quiescent current extends module standby time; rail-to-rail output matches 0–3.3 V ADC input range without level shifters. |
Use Scenario: Amplifying low-amplitude bio-potential signals (ECG, pulse oximetry) in handheld patient monitors. IC Role / Device Role / Timing Role: Low-noise, DC-coupled instrumentation amplifier front-end stage. Use Value: 70 nV/√Hz input noise and 4 Hz 1/f corner preserve microvolt-level signal integrity; −40°C to +125°C rating covers clinical and field use. |
| Smart Industrial Transmitters | Energy-Harvesting IoT Nodes |
|
Use Scenario: Conditioning 4–20 mA loop sensor outputs in IIoT field transmitters powered by loop energy. IC Role / Device Role / Timing Role: Precision current-to-voltage converter and filter driver for microcontroller ADC. Use Value: 93 dB CMRR rejects loop-induced common-mode noise; 2.7 V minimum supply enables operation during brownout conditions. |
Use Scenario: Signal amplification in solar- or vibration-powered environmental sensors with intermittent MCU wake cycles. IC Role / Device Role / Timing Role: Always-on analog front-end that remains active during MCU sleep to trigger wake-up on threshold events. Use Value: Sub-40 µA supply current draws negligible power from harvested sources; SC70 package minimizes board area in coin-sized nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV851DBVR | Lower IQ (320 nA), lower GBW (10 kHz), higher VOS (3.5 mV max) | Better for nano-power, low-frequency (<1 kHz) sensing; unsuitable for audio or fast step response. | Select TLV851DBVR only when sub-µA current dominates over bandwidth and precision requirements. |
| OPA316IDBVR | Higher IQ (400 µA), higher GBW (10 MHz), lower VOS (0.15 mV typ), same package | Supports higher-speed active filters and faster settling; trades 10× current for 3× bandwidth and 20× offset improvement. | Choose OPA316IDBVR when signal bandwidth exceeds 300 kHz or offset-critical 16-bit+ systems demand <0.5 mV VOS. |
Compared with TLV851DBVR and OPA316IDBVR, LMV551MGX/NOPB uniquely balances 3 MHz bandwidth, 37 µA current, and 93 dB CMRR in a 5-pin SC70 - making it optimal for mid-speed, battery-sensitive applications where neither nano-power nor high-speed performance is the sole priority.
Availability
LMV551MGX/NOPB is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, smart industrial transmitters, and energy-harvesting IoT nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV551MGX/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 low-power design.
The LMV55x family was engineered for ultra-low-power, wide-bandwidth signal conditioning in space-constrained, battery-operated systems - targeting automotive, portable instrumentation, and sensor interface applications demanding rail-to-rail performance and extended temperature operation.
FAQ
What is the maximum capacitive load the LMV551MGX/NOPB can drive without external compensation?
The LMV551MGX/NOPB maintains stable operation with capacitive loads ≤100 pF. For loads exceeding 100 pF - such as long PCB traces or ADC input capacitance - external compensation is required. Recommended methods include adding a 5–50 Ω isolation resistor (RISO) in series with the output or using in-loop RC feedback. Uncompensated operation beyond 100 pF risks oscillation due to phase margin degradation below 40°, as confirmed in Figure 26 and Table 1 of the LMV551MGX/NOPB datasheet.
Does the LMV551MGX/NOPB support true single-supply operation with input signals at ground potential?
Yes, the LMV551MGX/NOPB supports true single-supply operation with input common-mode voltage extending to V− (i.e., ground). Its input stage is designed to accept signals from 0 V up to V+ − 0.8 V at 5 V supply, enabling direct connection to ground-referenced sensors like thermistors, strain gauges, and bridge circuits without level-shifting circuitry. This capability is explicitly verified across the −40°C to +125°C range per Section 6.5 CMVR specifications in the LMV551MGX/NOPB datasheet.
What is the typical total harmonic distortion (THD) performance of the LMV551MGX/NOPB at 1 kHz?
The LMV551MGX/NOPB achieves 0.003% THD at 1 kHz with 2 kΩ load and AV = +2, as specified in both Sections 6.5 and 6.6 of its datasheet. This performance holds across 3 V and 5 V supplies and is validated under standard test conditions (VCM = V+/2, TA = 25°C). The low distortion stems from its advanced VIP50 process and rail-to-rail output architecture, making it suitable for audio preamplifier stages and precision waveform generation where spectral purity matters.
How does the supply current of the LMV551MGX/NOPB vary with temperature and supply voltage?
The LMV551MGX/NOPB draws 37 µA typical supply current at 25°C and 5 V, rising to 54 µA maximum across −40°C to +125°C. At 3 V, typical current is 34 µA (25°C), increasing to 52 µA max over temperature. Supply current increases linearly with V+, as shown in Figure 15 - ranging from ~30 µA at 2.7 V to ~50 µA at 5.5 V. These values are production-tested and guaranteed per Section 6.5/6.6 electrical characteristics tables in the LMV551MGX/NOPB datasheet.
Is the LMV551MGX/NOPB pin-compatible with other members of the LMV55x family?
No, the LMV551MGX/NOPB is not pin-compatible with LMV552 or LMV554. It uses a 5-pin SC70 or SOT-23 package with pinout {+IN, V−, −IN, OUT, V+}, whereas LMV552 (8-pin VSSOP) and LMV554 (14-pin TSSOP) have different pin counts, spacing, and channel arrangements. Pin compatibility exists only between LMV551 variants (e.g., LMV551MGX/NOPB and LMV551IDBVR), both sharing identical 5-pin SC70 footprints and functions per Table "Pin Functions: LMV551" in the datasheet.
LMV551MGX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 37µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMV551MGX/NOPB FAQ
1.How can I place an order for LMV551MGX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV551MGX/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 LMV551MGX/NOPB reliable?
The price and inventory of LMV551MGX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV551MGX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV551MGX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV551MGX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV551MGX/NOPB?
LMV551MGX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV551MGX/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 LMV551MGX/NOPB?
For technical support, including LMV551MGX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV551MGX/NOPB requirements.
6.How does Aetrix verify that LMV551MGX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV551MGX/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 LMV551MGX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV551MGX/NOPB?
All LMV551MGX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV551MGX/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 LMV551MGX/NOPB part is unused and in its original packaging.
Return procedure for LMV551MGX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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