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Texas Instruments LPV812DGKT
- Part No.:
- LPV812DGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LPV812DGKT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,354
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Product details
Overview
LPV812DGKT from Texas Instruments is a dual-channel nanopower precision operational amplifier designed for ultra-low-power sensing front-ends in battery-powered IoT and portable medical systems. It delivers 425 nA per channel supply current, 300 µV maximum offset voltage, 1 µV/°C offset drift, 8 kHz gain-bandwidth, and rail-to-rail output swing within 3.5 mV of the rails at 1.8 V - enabling multi-year operation in CO gas detectors and PIR motion sensors.
For engineers reviewing the LPV812DGKT datasheet, LPV812DGKT pinout, LPV812DGKT application, or LPV812DGKT equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions for VSSOP-8 layout, confirmed application use cases in electrochemical sensing and low-voltage thermostats, and two functionally comparable alternatives with documented parameter differences.
Technical Context
The LPV812DGKT integrates two independent CMOS-input op-amps with femtoampere input bias current (±100 fA), negative-rail-sensing input stage (VCM = V− to V+ − 0.9 V), and rail-to-rail output capable of 3.5 mV swing from rails at 1.8 V. Its 120 dB open-loop gain and 77–98 dB CMRR support high-precision transimpedance amplification in single-supply configurations.
EMI-hardened architecture suppresses interference from mobile/WiFi sources, while internal unity-gain compensation ensures stability with capacitive loads up to 20 pF - requiring only a 30–50 kΩ isolation resistor for >50 pF loads. Operating from 1.6 V to 5.5 V across −40°C to +125°C enables deployment in harsh industrial and automotive cabin environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 425 nA per channel at 3.3 V - enables >10-year battery life in coin-cell-powered remote sensors. |
| Offset Voltage | ≤300 µV max - eliminates need for system-level trimming in microvolt-level gas sensor signal chains. |
| Offset Drift | ±1 µV/°C - maintains <1 µV error over full −40°C to +125°C range, critical for uncalibrated field deployments. |
| Gain-Bandwidth | 8 kHz - supports DC-coupled amplification of slow electrochemical signals (e.g., CO sensor currents) without instability. |
| Input Bias Current | ±100 fA - preserves signal integrity when interfacing high-impedance sources like pH electrodes or photodiodes. |
| Output Swing | Within 3.5 mV of rails at 1.8 V - maximizes dynamic range in energy-harvesting systems with sub-2 V supply rails. |
| Common-Mode Range | Extends to V− - allows direct connection to ground-referenced sensors without level-shifting circuitry. |
Pinout & Package
LPV812DGKT is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for space-constrained PCB layouts in wearable and sensor-node designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives feedback network of first amplifier stage; rail-to-rail swing enables full utilization of ADC input range. |
| −IN A (Pin 2) | Channel A inverting input | Connects to transimpedance feedback node; femtoampere bias minimizes current-error contribution in I-to-V conversion. |
| +IN A (Pin 3) | Channel A non-inverting input | Accepts reference or sensor bias voltage; common-mode range to V− allows ground-referenced potentiostat control. |
| V− (Pin 4) | Negative supply rail | Reference for both channels; serves as analog ground in single-supply systems with no separate GND pin. |
| +IN B (Pin 5) | Channel B non-inverting input | Used for secondary sensing path (e.g., temperature compensation); independent input enables dual-sensor correlation. |
| −IN B (Pin 6) | Channel B inverting input | Configurable as summing node or second transimpedance input; identical bias performance to Channel A. |
| OUT B (Pin 7) | Channel B output | Provides isolated signal path for diagnostics or redundancy; avoids crosstalk via separate output drivers. |
| V+ (Pin 8) | Positive supply rail | Supplies both amplifiers; 1.6–5.5 V range supports direct connection to Li-SOCl₂, coin cells, or energy harvesters. |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower operation | 425 nA/channel quiescent current enables >10-year operation on CR2032 batteries in always-on gas detection nodes. |
| EMI-hardened architecture | Integrated RF filtering reduces susceptibility to 0–1 GHz interference from Bluetooth/WiFi, eliminating external ferrites. |
| Rail-to-rail output | Swings within 3.5 mV of V+ and V− at 1.8 V - preserves >99% of available signal range for 12-bit+ ADCs. |
| Negative-rail input stage | Common-mode range includes V−, allowing direct interface to grounded electrochemical cells without level shifters. |
| Femtoampere input bias | ±100 fA bias current prevents loading errors in >1 GΩ sensor impedance applications like pH or ion-selective electrodes. |
Applications
| CO Gas Detection | PIR Motion Sensing |
|---|---|
Use Scenario: Amplifying nanoampere-level current from unbiased three-electrode CO sensors in smart building air quality monitors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) for I-to-V conversion and potentiostat bias control in electrochemical cell interface. Use Value: 300 µV max offset and 1 µV/°C drift ensure stable baseline over temperature, eliminating false alarms caused by thermal drift. |
Use Scenario: Conditioning weak pyroelectric sensor outputs in battery-powered occupancy sensors with 10-year lifetime targets. IC Role / Device Role / Timing Role: Low-noise DC-coupled amplifier for high-impedance PIR element, followed by comparator threshold setting. Use Value: 425 nA supply current extends CR2032 battery life beyond 10 years, while rail-to-rail output maximizes ADC resolution. |
| IoT Remote Sensors | Portable Medical Devices |
Use Scenario: Signal conditioning for soil moisture, O₂, or environmental sensors deployed in agricultural or industrial wireless nodes. IC Role / Device Role / Timing Role: Precision buffer and gain stage for analog sensor outputs prior to SAR ADC sampling. Use Value: 8 kHz bandwidth supports DC–100 Hz sensor dynamics; EMI protection ensures reliable operation near RF gateways. |
Use Scenario: Front-end amplification in handheld glucose meters, pulse oximeters, and wearable ECG patches. IC Role / Device Role / Timing Role: Low-power instrumentation amplifier core for biopotential signal acquisition. Use Value: −40°C to +125°C rating covers sterilization cycles and body-worn thermal extremes; 1.6 V minimum supply enables direct Li-ion cell interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower precision amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPV821DRXT | Single-channel, 450 nA IQ, 370 µV VOS max, SOT-23-5 package | Lacks dual-channel integration; requires two devices for stereo or differential sensing | Select when board space permits discrete channel routing and single-channel functionality suffices. |
| TLV8812IDGKR | Dual-channel, 320 nA IQ, 1.6 mV VOS max, same VSSOP-8 footprint | Higher offset limits DC accuracy in microvolt-level electrochemical applications | Choose for ultra-low-power applications where offset tolerance >1 mV is acceptable and cost optimization is critical. |
Compared with LPV812DGKT, LPV821DRXT trades dual-channel integration for marginally higher offset but identical nanopower operation, while TLV8812IDGKR offers lower quiescent current at the expense of 5.3× higher max offset - making LPV812DGKT optimal for precision electrochemical sensing where offset stability dominates power savings.
Availability
LPV812DGKT is available at Aetrix Electronics and suitable for CO gas detectors, PIR motion sensors, and IoT remote sensors requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for LPV812DGKT 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 chain solutions.
The LPV812DGKT belongs to TI's LPV81x family of nanopower precision op-amps, engineered specifically for "always ON" battery-powered sensing applications where multi-year operation and microvolt-level accuracy are mandatory.
FAQ
What is the maximum operating temperature range for the LPV812DGKT?
The LPV812DGKT is specified to operate across −40°C to +125°C. This extended range supports deployment in automotive cabin modules, industrial process sensors, and sterilizable medical devices - all while maintaining its 425 nA/channel supply current and ≤300 µV offset voltage performance.
Does the LPV812DGKT support rail-to-rail input operation?
No, the LPV812DGKT features a negative-rail-sensing input stage with common-mode range from V− to V+ − 0.9 V - not full rail-to-rail input. However, its ability to accept inputs down to V− makes it ideal for single-supply ground-referenced sensors, unlike many competing op-amps that require ≥100 mV headroom below V−.
Can the LPV812DGKT drive capacitive loads directly?
The LPV812DGKT is unity-gain stable with ≤20 pF capacitive loads. For loads exceeding 50 pF, TI recommends adding a 30–50 kΩ isolation resistor (RISO) between the output and load capacitance - a proven method used in TIDA-0756 CO sensor reference designs to prevent peaking and oscillation.
What is the typical input voltage noise of the LPV812DGKT at 1 kHz?
The LPV812DGKT exhibits 420 nV/√Hz input voltage noise density at 1 kHz. Combined with its 8 kHz bandwidth and 300 µV max offset, this noise floor supports accurate amplification of low-frequency electrochemical signals without significant SNR degradation in battery-operated gas sensors.
Is the LPV812DGKT pin-compatible with other dual op-amps in VSSOP-8 packages?
The LPV812DGKT uses a non-standard VSSOP-8 pinout optimized for dual-channel independence (e.g., separate +IN/−IN pairs per channel). It is not pin-compatible with generic dual op-amps like LMV358 or TLV2372. Layout must follow the exact pin mapping shown in the official datasheet Figure 5 for LPV812 DGK package.
LPV812DGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0021V/µs
- Gain Bandwidth Product:
- 8 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 55 µV
- Current - Supply:
- 425nA (x2 Channels)
- Current - Output / Channel:
- 4.7 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LPV812DGKT FAQ
1.How can I place an order for LPV812DGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV812DGKT 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 LPV812DGKT reliable?
The price and inventory of LPV812DGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV812DGKT is usually 5 days.
3.What payment methods are accepted for LPV812DGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV812DGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV812DGKT?
LPV812DGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV812DGKT 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 LPV812DGKT?
For technical support, including LPV812DGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV812DGKT requirements.
6.How does Aetrix verify that LPV812DGKT is sourced from the original manufacturer or authorized distributors?
All LPV812DGKT 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 LPV812DGKT meets industry standards.
7.What is the process for return or replacement of LPV812DGKT?
All LPV812DGKT units undergo pre-shipment inspection (PSI). If there is an issue with LPV812DGKT, 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 LPV812DGKT part is unused and in its original packaging.
Return procedure for LPV812DGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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