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Texas Instruments LPV821DBVR
- Part No.:
- LPV821DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LPV821DBVR.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,807
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Product details
Overview
LPV821DBVR from Texas Instruments is a single-channel, nanopower, zero-drift operational amplifier designed for ultra-low-power, high-precision signal conditioning in battery-powered sensing systems. It delivers ±10 μV max offset voltage, ±0.096 μV/°C max drift, 650 nA quiescent current, 8 kHz gain bandwidth, and rail-to-rail input/output operation across 1.7 V to 3.6 V supply - enabling accurate low-side current sensing with shunt resistors in gas detectors and portable instrumentation.
For engineers reviewing the LPV821DBVR datasheet, LPV821DBVR pinout, LPV821DBVR application, or LPV821DBVR equivalent, key selection criteria include its sub-1-μV/°C drift stability over –40°C to 125°C, picoampere-level input bias current (±7 pA), EMI-hardened architecture, and validated performance in high-impedance sensor interfaces such as thermistors, RTDs, and strain gauges.
Technical Context
The LPV821DBVR implements a proprietary auto-calibration technique that continuously corrects input offset every 1 ms, eliminating 1/f noise and enabling true zero-drift behavior without aliasing. Its time-continuous 8-kHz signal-path amplifier operates alongside a chopper-stabilized correction loop, preserving bandwidth while achieving <10 μV initial offset and near-zero long-term drift.
This architecture supports rail-to-rail input common-mode range (V– to V+) and output swing within 12 mV of both rails, ensuring maximum dynamic range in single-supply 1.8 V or 3.3 V systems. The device integrates internal EMI filtering on both differential and common-mode paths, reducing sensitivity to RF interference from mobile devices and wireless transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 650 nA - enables multi-year battery life in always-on IoT sensors and portable gas analyzers. |
| Input Offset Voltage | ±10 μV (max) - ensures ≤0.1% gain error in 100-mΩ shunt-based current sensing at 1 A. |
| Offset Drift | ±0.096 μV/°C (max) - limits total offset shift to <16.8 μV across –40°C to 125°C operating range. |
| Gain Bandwidth | 8 kHz - supports stable DC-coupled amplification of slow-varying sensor signals (e.g., temperature, strain). |
| Input Bias Current | ±7 pA (25°C) - minimizes voltage error in megaohm-feedback configurations and high-Z thermistor bridges. |
| Supply Voltage Range | 1.7 V to 3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, and alkaline battery systems without regulation. |
| 0.1–10 Hz Noise | 3.9 μVPP - preserves resolution in precision DC measurements like RTD or pressure transducer outputs. |
Pinout & Package
LPV821DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in portable instrumentation and wearable sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail output swing (within 12 mV of V+ or V–); drives ADC reference inputs or high-impedance loads directly. |
| 2 - V– | Negative supply terminal | Connects to system ground in single-supply configurations; establishes lowest reference potential for input common-mode range. |
| 3 - +IN | Non-inverting input | Accepts signals up to V– or V+ rail; used for bias voltage buffering or high-side sensing in difference amplifier topologies. |
| 4 - –IN | Inverting input | Receives feedback or shunt voltage in current-sense applications; matched impedance critical for CMRR >100 dB. |
| 5 - V+ | Positive supply terminal | Accepts 1.7–3.6 V input; requires local 0.1-μF ceramic decoupling to maintain PSRR >100 dB and suppress supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Continuous 1-ms offset correction eliminates thermal drift and 1/f noise - no external calibration required over lifetime. |
| Rail-to-rail I/O | Full input common-mode range (V– to V+) and output swing to within 12 mV of rails - maximizes usable ADC input range in 3.3 V systems. |
| EMI-hardened input stage | Integrated low-pass filtering rejects RF interference from WiFi, Bluetooth, and cellular bands - prevents DC offset shifts in noisy environments. |
| Picoampere input bias | ±7 pA at 25°C - avoids loading errors in high-impedance sensor nodes (e.g., 10 MΩ thermistor networks or piezoresistive bridges). |
| Unity-gain stability | Stable operation at G = 1 with ≥50 pF capacitive load when isolated by RISO - simplifies design of buffer stages driving ADC inputs or cables. |
Applications
| Low-Side Current Sensing | High-Impedance Temperature Sensing |
|---|---|
|
Use Scenario: Monitoring battery discharge current in portable gas detectors using a 100-mΩ shunt resistor. IC Role / Device Role / Timing Role: LPV821DBVR serves as a precision difference amplifier with buffered bias voltage, converting mV-level shunt voltage into a ratiometric 0–3.3 V output for 12-bit ADC digitization. Use Value: ±10 μV offset and ±0.096 μV/°C drift ensure <0.5% full-scale error across industrial temperature range without recalibration. |
Use Scenario: Reading resistance of a 100-kΩ NTC thermistor in handheld environmental monitors. IC Role / Device Role / Timing Role: LPV821DBVR configures as a unity-gain buffer between thermistor divider and ADC, isolating high-impedance node from switching noise. Use Value: ±7 pA input bias prevents >1-Ω measurement error in 100-kΩ network; 650 nA IQ extends battery life beyond 5 years. |
| Strain Gauge Signal Conditioning | RTD-Based Process Analytics |
|
Use Scenario: Amplifying Wheatstone bridge output from micro-strain sensors in electronic scales. IC Role / Device Role / Timing Role: LPV821DBVR operates as an instrumentation-grade front-end amplifier with matched gain-setting resistors, rejecting common-mode noise. Use Value: 100 dB CMRR and 3.9 μVPP 0.1–10 Hz noise preserve sub-100-με resolution in static load measurements. |
Use Scenario: Linearizing Pt100 RTD output in industrial process controllers with 4–20 mA loop interface. IC Role / Device Role / Timing Role: LPV821DBVR provides excitation-current buffering and low-drift voltage amplification in constant-current RTD bias circuits. Use Value: 1.7–3.6 V operation allows direct use of 3.3 V MCU supply; ±0.096 μV/°C drift contributes <0.02 °C error in 0–100 °C span. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision nanopower amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPV811DBVR | Higher offset (370 μV max), lower IQ (450 nA), wider supply (1.6–5.5 V) | Better suited for cost-sensitive, less-precise battery monitoring where sub-μV drift is unnecessary | Select LPV811DBVR only if offset drift tolerance exceeds ±5 μV/°C and supply may dip below 1.7 V. |
| OPA369AIDBVR | Higher IQ (800 nA), higher offset (750 μV max), same SOT-23-5 package | Offers better drive strength (25 mA) but lacks zero-drift architecture - unsuitable for DC-critical RTD/thermistor apps | Choose OPA369AIDBVR only when sourcing >10 mA output current is required and offset stability is secondary. |
Compared with LPV821DBVR, LPV811DBVR trades precision for lower power and broader supply range, while OPA369AIDBVR sacrifices zero-drift performance for higher output drive - making LPV821DBVR uniquely optimal for ultra-stable, battery-constrained DC sensor interfaces.
Availability
LPV821DBVR is available at Aetrix Electronics and suitable for battery-powered instruments, gas detection modules, and process analytics equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LPV821DBVR 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 signal chains.
The LPV821DBVR belongs to TI's Precision Nano-Power Amplifier family, engineered specifically for "always-on" sensing applications demanding sub-μV offset stability, picoampere bias, and multi-year operation from primary batteries.
FAQ
What is the maximum operating temperature range for the LPV821DBVR?
The LPV821DBVR is fully specified from –40°C to +125°C ambient temperature. Its ±0.096 μV/°C maximum offset drift ensures predictable performance across this full industrial range, validated per JEDEC JESD22-A108. This makes LPV821DBVR suitable for under-hood automotive sensors and outdoor environmental monitors where thermal extremes occur.
Can the LPV821DBVR drive a 100-pF capacitive load directly?
No - the LPV821DBVR requires isolation for capacitive loads exceeding 20 pF. For a 100-pF load, a 140-kΩ series resistor (RISO) must be placed between the OUT pin and the load, as specified in TI's SNOSD36A datasheet Table 1. Direct connection risks phase-margin loss and potential oscillation due to output impedance interaction.
Does the LPV821DBVR support dual-supply operation?
Yes - the LPV821DBVR operates with split supplies as low as ±0.85 V (i.e., V+ = +0.85 V, V– = –0.85 V), though its absolute maximum ratings limit total supply voltage to 4 V. However, its primary design focus is single-supply use (1.7–3.6 V), where rail-to-rail input and output deliver maximum dynamic range without negative rails.
How does the LPV821DBVR achieve EMI hardening?
The LPV821DBVR integrates dedicated on-die low-pass filters on both differential and common-mode input paths, attenuating RF energy from 10 MHz to 1 GHz before it reaches the core amplifier. This reduces EMI-induced DC offset shifts by >20 dB compared to standard op amps - critical in medical wearables and industrial gateways near wireless transceivers.
Is the LPV821DBVR pin-compatible with other SOT-23-5 op amps?
The LPV821DBVR uses standard SOT-23-5 pinout (OUT, V–, +IN, –IN, V+), matching industry conventions. However, functional compatibility depends on electrical specs: its 650 nA IQ and zero-drift architecture differ significantly from non-zero-drift SOT-23-5 op amps like TLV2461 or OPA348 - substitution requires validation of offset, drift, and noise requirements in the target circuit.
LPV821DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0033V/µs
- Gain Bandwidth Product:
- 8 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 pA
- Voltage - Input Offset:
- 1.5 µV
- Current - Supply:
- 650nA
- Current - Output / Channel:
- 21 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LPV821DBVR FAQ
1.How can I place an order for LPV821DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV821DBVR 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 LPV821DBVR reliable?
The price and inventory of LPV821DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV821DBVR is usually 5 days.
3.What payment methods are accepted for LPV821DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV821DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV821DBVR?
LPV821DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV821DBVR 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 LPV821DBVR?
For technical support, including LPV821DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV821DBVR requirements.
6.How does Aetrix verify that LPV821DBVR is sourced from the original manufacturer or authorized distributors?
All LPV821DBVR 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 LPV821DBVR meets industry standards.
7.What is the process for return or replacement of LPV821DBVR?
All LPV821DBVR units undergo pre-shipment inspection (PSI). If there is an issue with LPV821DBVR, 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 LPV821DBVR part is unused and in its original packaging.
Return procedure for LPV821DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPV821DBVR Tags
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