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Texas Instruments LMV321IDBVT
- Part No.:
- LMV321IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321IDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
LMV321IDBVT from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5.5 V) operation, featuring 1 MHz unity-gain bandwidth, 1 V/μs slew rate, and 130 μA typical supply current. It delivers rail-to-rail output swing, ground-sensing input capability, and operates across –40°C to +125°C - enabling use in battery-powered sensor signal conditioning and portable audio front-ends.
For engineers reviewing the LMV321IDBVT datasheet, LMV321IDBVT pinout, LMV321IDBVT application, or LMV321IDBVT equivalent, key selection criteria include its SOT-23-5 package footprint, low quiescent current at 2.7 V, input offset voltage ≤7 mV, rail-to-rail output drive into 10 kΩ, and compatibility with single-supply systems requiring wide common-mode input range down to GND.
Technical Context
The LMV321IDBVT employs a CMOS input stage enabling nanoscale input bias current (11–250 nA), paired with a Class AB output stage delivering true rail-to-rail swing without crossover distortion. Its internal compensation ensures stable unity-gain operation with capacitive loads up to 1000 pF when driving 2 kΩ.
Designed for single-supply operation, it supports common-mode input voltages from –0.2 V to (VCC – 0.2 V), allowing direct interfacing with microcontroller ADC references and analog sensors operating near ground. No external shutdown control is present - unlike the LMV324S - confirming its fixed-enable architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - enables direct integration into Li-ion (3.0–3.7 V) and USB-powered (5 V) systems without LDO overhead. |
| Unity-Gain Bandwidth | 1 MHz - supports stable amplification of audio-band signals (≤20 kHz) with ≥60° phase margin at 10 kΩ load. |
| Slew Rate | 1 V/μs - allows clean 100-kHz, 1-VPP sine wave reproduction without slewing-induced distortion. |
| Input Offset Voltage | 7 mV max (typ 1.7 mV) - ensures ≤0.7% gain error in 1-V full-scale precision sensor buffers. |
| Supply Current | 130 μA typ at 2.7 V - extends battery life in always-on IoT node front-ends (e.g., >1-year runtime on CR2032). |
| Output Swing | Within 60 mV of rails (RL = 10 kΩ) - maximizes dynamic range for 10-bit ADCs referenced to same VCC. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive cabin sensors and industrial motor control feedback paths. |
Pinout & Package
LMV321IDBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm × 1.15 mm, optimized for high-density PCB layouts and thermal performance (RθJA = 206°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires local 100-nF bypass capacitor to VCC for stability. |
| 2 (IN–) | Inverting input | High-impedance node (250 nA max bias); sensitive to PCB leakage - keep trace short and guard-ring isolated. |
| 3 (IN+) | Noninverting input | Accepts common-mode voltages from –0.2 V to VCC – 0.2 V; compatible with 0 V-referenced sensors. |
| 4 (GND) | Negative supply reference | Must connect directly to low-impedance system ground plane; avoid sharing with digital return paths. |
| 5 (VCC+) | Positive supply | Accepts 2.7–5.5 V; decoupling capacitor required within 5 mm to minimize supply-induced noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range in single-supply data acquisition systems without level-shifting circuitry. |
| Ground-sensing input | Allows direct connection of thermistors, bridge sensors, or current-sense resistors referenced to system GND. |
| Low 130-μA supply current | Reduces self-heating in sealed enclosures and extends shelf life of battery-backed instrumentation. |
| No crossover distortion | Preserves signal fidelity in audio preamplifiers and active filters where harmonic content must remain below –60 dBc. |
| ESD robustness (2000-V HBM) | Survives handling in standard assembly lines without special ESD protocols, lowering manufacturing cost. |
Applications
| Portable Media Players | Motor Control: AC Induction |
|---|---|
Use Scenario: Amplifying line-level audio signals from DACs before headphone drivers in compact MP3 players. IC Role / Device Role / Timing Role: Single-supply op-amp configured as noninverting buffer with gain = 1, preserving DC-coupled signal integrity. Use Value: Rail-to-rail output swing maximizes SNR into 16-Ω headphones; 130 μA quiescent current extends playback time per charge. | Use Scenario: Conditioning analog feedback signals from current-sense shunts in inverter gate driver circuits. IC Role / Device Role / Timing Role: Low-offset, ground-referenced amplifier converting mV-level shunt voltage to 0–3.3 V for MCU ADC sampling. Use Value: Input common-mode range including GND eliminates need for level-shifting; –40°C to +125°C rating matches inverter ambient. |
| Desktop PCs | Pro Audio Mixers |
Use Scenario: Monitoring 12 V/5 V/3.3 V rail voltages via resistor dividers for system health reporting in ATX power supplies. IC Role / Device Role / Timing Role: Precision comparator alternative - used in slow-slew, high-accuracy voltage monitoring with hysteresis. Use Value: 7 mV max input offset ensures <±1% measurement error on 3.3 V rail; 2.7 V min supply supports brown-out detection logic. | Use Scenario: Implementing channel fader buffers and summing nodes in analog mixing consoles with ±15 V rails. IC Role / Device Role / Timing Role: Unity-gain stable follower isolating potentiometer wipers from downstream filter networks. Use Value: 1 MHz bandwidth preserves transient response of percussive transients; no crossover distortion maintains harmonic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Lower input offset (0.75 mV typ), higher 1-MHz GBW, but 150 μA supply current and only rated to 125°C. | Preferred for precision sensor interfaces needing sub-mV offset; less suitable for extended-temperature industrial control. | Select TLV9001IDBVR when offset drift or THD matters more than quiescent power or temperature range. |
| LM321AMX/NOPB | Wider supply range (3–32 V), higher 700-μA ICC, no rail-to-rail output - swings within 1.5 V of rails. | Used in legacy 5 V/12 V systems where rail-to-rail isn't required and higher supply headroom exists. | Choose LM321AMX/NOPB only when retrofitting into existing designs using LM321 footprints and 5 V+ supplies. |
Compared with TLV9001IDBVR and LM321AMX/NOPB, LMV321IDBVT offers the optimal balance of ultra-low power (130 μA), full rail-to-rail output, and extended temperature support - making it ideal for new energy-conscious designs where supply voltage is constrained to 2.7–5.5 V.
Availability
LMV321IDBVT is available at Aetrix Electronics and suitable for portable media players, motor control feedback loops, desktop PC power monitoring, and pro audio signal buffering requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.
Supply support for LMV321IDBVT 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, power management, and signal chain solutions.
The LMV3xx family was designed specifically for cost-sensitive, space-constrained applications operating from 2.7 V to 5.5 V - targeting portable electronics, industrial sensors, and automotive cabin modules where rail-to-rail output and low quiescent current are critical.
FAQ
What is the maximum operating temperature for LMV321IDBVT?
The LMV321IDBVT is specified for continuous operation from –40°C to +125°C, meeting industrial and extended-temperature automotive requirements. This rating applies across the full 2.7–5.5 V supply range and is validated per JEDEC JESD22-A108. Derating is not required up to 125°C ambient when mounted on a standard FR-4 PCB with recommended copper pour.
Does LMV321IDBVT support dual-supply operation?
Yes, LMV321IDBVT supports dual-supply operation (e.g., ±2.5 V), though it is optimized for single-supply use. With symmetric rails, the input common-mode range extends from –0.2 V to (VCC+ – 0.2 V), and output swings rail-to-rail. However, no internal shutdown or enable pin exists - functionality remains always-on regardless of supply configuration.
What is the input bias current specification for LMV321IDBVT?
The LMV321IDBVT features a CMOS input stage with input bias current of 11 nA typical and 250 nA maximum at 25°C (VCC = 2.7 V). This low bias current minimizes voltage errors in high-impedance sensor interfaces (e.g., pH electrodes or photodiode transimpedance stages), especially when combined with its ground-sensing input capability.
Can LMV321IDBVT drive capacitive loads reliably?
Yes, LMV321IDBVT is unity-gain stable with capacitive loads up to 1000 pF when driving a 2 kΩ load, as confirmed by TI's characterization data (Figure 7). For loads >100 pF, adding a 10-Ω series resistor between the output and capacitance improves phase margin. Stability is maintained across –40°C to +125°C without external compensation.
Is LMV321IDBVT pin-compatible with other SOT-23 op-amps?
LMV321IDBVT uses the standard 5-pin SOT-23 (DBV) pinout: Pin 1 = OUT, Pin 2 = IN–, Pin 3 = IN+, Pin 4 = GND, Pin 5 = VCC+. It is pin-compatible with TLV2461, MCP6001, and TS912 - but functional equivalence requires verification of bandwidth, offset, and supply current. Always confirm layout compatibility using TI's official DBV mechanical drawing.
LMV321IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 1.7 mV
- Current - Supply:
- 130µA
- Current - Output / Channel:
- -
- 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:
- SOT-23-5
LMV321IDBVT FAQ
1.How can I place an order for LMV321IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321IDBVT 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 LMV321IDBVT reliable?
The price and inventory of LMV321IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321IDBVT is usually 5 days.
3.What payment methods are accepted for LMV321IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321IDBVT?
LMV321IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321IDBVT 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 LMV321IDBVT?
For technical support, including LMV321IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321IDBVT requirements.
6.How does Aetrix verify that LMV321IDBVT is sourced from the original manufacturer or authorized distributors?
All LMV321IDBVT 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 LMV321IDBVT meets industry standards.
7.What is the process for return or replacement of LMV321IDBVT?
All LMV321IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with LMV321IDBVT, 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 LMV321IDBVT part is unused and in its original packaging.
Return procedure for LMV321IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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