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Texas Instruments LPV812DGKR
- Part No.:
- LPV812DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LPV812DGKR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,683
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Product details
Overview
LPV812DGKR from Texas Instruments is a dual-channel nanopower precision operational amplifier designed for ultra-low-power sensor signal conditioning in battery-critical systems. It delivers 425 nA per channel supply current, 300 µV maximum offset voltage, 1 µV/°C drift, 8 kHz gain-bandwidth, and rail-to-rail output swing within 3.5 mV of rails - enabling high-accuracy amplification in CO gas detectors and IoT remote sensors.
For engineers reviewing the LPV812DGKR datasheet, LPV812DGKR pinout, LPV812DGKR application, or LPV812DGKR equivalent, key selection criteria include its femtoampere input bias current (100 fA), –40°C to 125°C operation, EMI-hardened architecture, and VSSOP-8 packaging optimized for space-constrained, always-on sensing nodes.
Technical Context
The LPV812DGKR employs a CMOS input stage with negative-rail sensing capability, supporting common-mode input down to V–, and a rail-to-rail output stage delivering millivolt-level headroom at 1.6 V to 5.5 V supply. Its internal unity-gain compensation ensures stability without external components across its 8 kHz bandwidth.
EMI protection is integrated at the die level to suppress interference from mobile radios and RFID readers, while trimmed offset and low drift enable direct DC-coupled use in precision electrochemical sensor front-ends - such as potentiostat circuits for three-terminal CO sensors - without calibration overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 425 nA per channel - enables multi-year battery life in coin-cell-powered gas detectors and wearable medical sensors. |
| Input Offset Voltage | 300 µV max - supports accurate DC amplification of microvolt-level sensor outputs without trimming circuitry. |
| Offset Drift | 1 µV/°C - ensures stable baseline over industrial temperature range (–40°C to 125°C) in thermostats and environmental monitors. |
| Gain-Bandwidth Product | 8 kHz - sufficient for low-frequency sensor signals (e.g., PIR motion detection, O₂ electrochemical response) while minimizing power. |
| Input Bias Current | 100 fA - preserves signal integrity when interfacing high-impedance sources like pH electrodes or photodiode arrays. |
| Output Swing | Within 3.5 mV of rails at 1.8 V - maximizes dynamic range in single-supply, low-voltage systems such as portable medical equipment. |
| Common-Mode Range | Extends to V– - allows direct connection to ground-referenced sensors without level-shifting circuitry. |
Pinout & Package
LPV812DGKR is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for compact PCB layouts in space-constrained IoT sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives feedback network or next-stage ADC input; rail-to-rail swing preserves full-scale resolution. |
| –IN A (Pin 2) | Channel A inverting input | Accepts inverted signal path in transimpedance or differential configurations; 100 fA bias minimizes error in high-Z nodes. |
| +IN A (Pin 3) | Channel A non-inverting input | Connects to reference electrode or sensor node; supports common-mode down to V– for single-supply biasing. |
| V– (Pin 4) | Negative supply rail | Ground reference for single-supply operation; also serves as common-mode lower bound for input stage. |
| +IN B (Pin 5) | Channel B non-inverting input | Enables dual-sensor monitoring (e.g., CO + temperature) or chopper-stabilized architectures using external switching. |
| –IN B (Pin 6) | Channel B inverting input | Supports independent signal path for second sensor; identical electrical specs to Channel A ensure matched performance. |
| OUT B (Pin 7) | Channel B output | Provides isolated amplification path; no crosstalk between channels confirmed in datasheet AC performance curves. |
| V+ (Pin 8) | Positive supply rail | Accepts 1.6 V–5.5 V input; internal regulation ensures consistent quiescent current across voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower operation | 425 nA/channel enables >10-year battery life in CR2032-powered IoT sensors with 10-second wake-up intervals. |
| Rail-to-rail output | Swings within 3.5 mV of V+ and V– at 1.8 V supply, preserving >99% of available dynamic range for 12-bit ADCs. |
| Negative-rail sensing input | Common-mode range includes V–, eliminating need for level-shifting in grounded sensor interfaces like thermistors or strain gauges. |
| Femtoampere input bias | 100 fA bias current prevents loading errors in >1 GΩ source impedances typical of electrochemical gas cells and piezoresistive elements. |
| Integrated EMI protection | Hardens against 0 dBm RF fields up to 1 GHz, reducing susceptibility in wireless gateways and smart metering applications. |
Applications
| CO Gas Detection | PIR Motion Sensing |
|---|---|
|
Use Scenario: Amplifying nanoampere-level current from unbiased three-electrode CO sensor in battery-operated air quality monitor. IC Role / Device Role / Timing Role: Transimpedance amplifier in potentiostat loop; maintains zero potential between working and reference electrodes. Use Value: 300 µV max offset and 1 µV/°C drift eliminate calibration drift over temperature, enabling ±2 ppm CO accuracy without firmware compensation. |
Use Scenario: Conditioning low-amplitude, low-frequency (<10 Hz) pyroelectric signal in occupancy sensor with 10-year coin-cell life. IC Role / Device Role / Timing Role: DC-coupled amplifier with high-pass filtering; provides gain before microcontroller ADC sampling. Use Value: 425 nA quiescent current extends battery life beyond 10 years at 1-second wake-up interval; rail-to-rail output maximizes ADC utilization. |
| IoT Remote Temperature Monitoring | Portable Medical Electrode Interface |
|
Use Scenario: Signal conditioning for NTC thermistor in wireless thermostat node powered by AA batteries. IC Role / Device Role / Timing Role: Precision voltage follower and buffer; isolates high-resistance thermistor from ADC input capacitance. Use Value: 100 fA input bias prevents self-heating error in 100 kΩ–1 MΩ thermistor networks; –40°C to 125°C rating covers outdoor deployment. |
Use Scenario: Front-end amplification for dry-contact ECG electrodes in handheld vital signs monitor. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier input stage; rejects common-mode interference from body coupling. Use Value: EMI-hardened design suppresses RF pickup from nearby cellular/WiFi devices; rail-to-rail output drives low-voltage SAR ADC directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPV821DRX | Single-channel, 320 nA IQ, 3.5 mV max VOS - higher offset, lower power than LPV812DGKR. | Best suited for single-sensor nodes where board area is constrained and offset tolerance >3 mV is acceptable. | Select LPV821DRX only when dual-channel functionality is unnecessary and ultra-low IQ outweighs precision requirements. |
| TLV8812IDGKR | Dual-channel, 350 nA IQ, 500 µV max VOS, 10 kHz GBW - slightly higher power, wider bandwidth, looser offset spec. | Preferred for higher-speed sensor interfaces (e.g., ultrasonic time-of-flight) where 8 kHz is insufficient. | Choose TLV8812IDGKR when system requires >8 kHz bandwidth and can tolerate higher offset; not drop-in compatible due to different pinout. |
Compared with LPV812DGKR, LPV821DRX trades precision for lower power in single-channel use cases, while TLV8812IDGKR offers higher bandwidth at the cost of offset accuracy and pin compatibility - making LPV812DGKR optimal for dual-channel, precision, ultra-low-power DC sensing.
Availability
LPV812DGKR is available at Aetrix Electronics and suitable for CO gas detectors, PIR motion sensors, and IoT remote temperature monitors requiring stable component supply across extended production lifecycles.
Supply support for LPV812DGKR 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 LPV812DGKR belongs to TI's LPV8xx family of nanopower op-amps, engineered specifically for "always ON" battery-powered sensing - targeting gas detection, portable medical devices, and energy-harvested IoT endpoints where microampere-level power budgets are mandatory.
FAQ
What is the maximum operating temperature range for LPV812DGKR?
The LPV812DGKR is rated for continuous operation from –40°C to +125°C ambient temperature, validated per JEDEC JESD22-A108. This extended range supports deployment in automotive cabin sensors, industrial thermostats, and outdoor environmental monitors without derating. All key parameters - including offset voltage, supply current, and CMRR - are specified across this full range in the official datasheet SNOSD33B.
Does LPV812DGKR support rail-to-rail input operation?
No, LPV812DGKR does not support rail-to-rail input. Its common-mode input voltage range extends from V– to (V+) – 0.9 V, meaning it cannot accept signals within 0.9 V of the positive rail. However, it does support negative-rail sensing - inputs can go down to V– - making it ideal for single-supply grounded sensor interfaces. This specification is explicitly defined in Section 6.5 of the LPV812DGKR datasheet.
Can LPV812DGKR drive capacitive loads directly?
LPV812DGKR is unity-gain stable but becomes unstable with capacitive loads >50 pF directly on the output. For reliable operation, TI recommends adding a 30–50 kΩ isolation resistor (RISO) between the output and capacitive load, as shown in Figure 45 of the datasheet. This configuration decouples the load capacitance from the amplifier's feedback loop, preventing peaking or oscillation while maintaining DC accuracy.
Is LPV812DGKR pin-compatible with other VSSOP-8 op-amps?
LPV812DGKR uses a non-standard pinout optimized for dual-channel operation and EMI robustness - it is not pin-compatible with generic VSSOP-8 op-amps like the LMV358 or TLV2372. Pin mapping (e.g., V– on Pin 4, +IN B on Pin 5) is unique to the LPV8xx family. Board redesign is required when substituting; always verify pin functions against the LPV812DGKR-specific pin diagram in Section 5 of SNOSD33B.
What is the typical input voltage noise of LPV812DGKR at 1 kHz?
The LPV812DGKR exhibits 420 nV/√Hz input voltage noise density at 1 kHz, as measured and published in Section 6.5 of the datasheet. This value is critical for low-frequency sensor applications - such as thermistor or strain gauge amplification - where noise integration over bandwidth determines effective resolution. At 0.1–10 Hz, its peak-to-peak noise is 6.5 µV, confirming suitability for DC-coupled precision measurement.
LPV812DGKR 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
LPV812DGKR FAQ
1.How can I place an order for LPV812DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV812DGKR 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 LPV812DGKR reliable?
The price and inventory of LPV812DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV812DGKR is usually 5 days.
3.What payment methods are accepted for LPV812DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV812DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV812DGKR?
LPV812DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV812DGKR 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 LPV812DGKR?
For technical support, including LPV812DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV812DGKR requirements.
6.How does Aetrix verify that LPV812DGKR is sourced from the original manufacturer or authorized distributors?
All LPV812DGKR 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 LPV812DGKR meets industry standards.
7.What is the process for return or replacement of LPV812DGKR?
All LPV812DGKR units undergo pre-shipment inspection (PSI). If there is an issue with LPV812DGKR, 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 LPV812DGKR part is unused and in its original packaging.
Return procedure for LPV812DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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