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Texas Instruments LPV321DCKR
- Part No.:
- LPV321DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LPV321DCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,686
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Product details
Overview
LPV321DCKR from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5 V), ultra-low-power (9 μA typical supply current) applications. It delivers 152 kHz gain-bandwidth product, −40°C to 85°C operation, and rail-to-rail output swing within 3.5 mV of VCC+ and 90 mV of VCC− at 100-kΩ load-ideal for battery-powered sensor signal conditioning and portable medical devices.
For engineers reviewing the LPV321DCKR datasheet, LPV321DCKR pinout, LPV321DCKR application, or LPV321DCKR equivalent, key selection criteria include its SC-70-5 package footprint, input common-mode range extending to −0.2 V, stable operation with 1000-pF capacitive loads, and JESD 22-compliant ESD protection (2000-V HBM).
Technical Context
The LPV321DCKR implements a CMOS input stage with rail-to-rail output stage, enabling full-swing operation in single-supply systems down to 2.7 V. Its input common-mode voltage range spans −0.2 V to VCC+ − 0.8 V, supporting ground-referenced inputs without level-shifting circuitry.
It achieves stability with capacitive loads up to 1000 pF and exhibits no crossover distortion across its operating temperature range. The device's 152 kHz GBW and 0.1 V/μs slew rate are specified at both 2.7 V and 5 V supplies, with consistent performance over −40°C to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - enables direct integration into 3.3-V and 5-V logic-compatible systems without level shifters. |
| Supply Current (Typ) | 9 μA - supports multi-year battery life in always-on IoT sensor nodes and wearable health monitors. |
| Gain Bandwidth Product | 152 kHz - sufficient for DC–100 kHz signal amplification in precision thermistor, strain gauge, and pH sensor interfaces. |
| Rail-to-Rail Output Swing | VCC+ − 3.5 mV / VCC− + 90 mV at 100-kΩ - maximizes dynamic range in low-voltage ADC front-ends. |
| Input Common-Mode Range | −0.2 V to VCC+ − 0.8 V - allows direct sensing of signals referenced to ground or negative bias rails. |
| ESD Protection | 2000-V HBM - reduces need for external transient suppression in handheld and industrial field equipment. |
| Operating Temperature | −40°C to +85°C - qualified for automotive cabin electronics, industrial control I/O modules, and outdoor environmental sensors. |
Pinout & Package
LPV321DCKR is housed in a 5-pin SC-70 (DCK) package, measuring 2.0 mm × 1.25 mm × 0.9 mm, with moisture sensitivity level (MSL) 1 and lead finish Cu-NiPdAu.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN− | Inverting input terminal - accepts feedback network or differential reference for precision gain configuration. |
| 2 | IN+ | Non-inverting input terminal - connects directly to high-impedance sensors (e.g., thermocouples, photodiodes) without loading error. |
| 3 | VCC− | Negative supply rail (GND in single-supply use) - must be decoupled with 0.1-μF ceramic capacitor near pin for noise immunity. |
| 4 | VCC+ | Positive supply rail - supports 2.7–5 V operation; internal biasing ensures rail-to-rail output functionality. |
| 5 | OUTPUT | Amplified output node - drives 100-kΩ loads to within 3.5 mV of VCC+ and 90 mV of VCC−, enabling full ADC utilization. |
Key Features
| Feature | Design Value |
|---|---|
| No Crossover Distortion | Eliminates switching artifacts in audio and precision analog paths, preserving signal integrity in zero-crossing detection circuits. |
| Stable with 1000-pF Load | Enables direct driving of long PCB traces, LCD bias networks, or sampling capacitors without external isolation resistors. |
| Latch-Up Immunity | Exceeds 100 mA per JESD 78 Class II - prevents destructive failure during power sequencing or hot-plug events. |
| Low Input Bias Current | 1.7 nA typical - minimizes voltage error in high-impedance transducer interfaces (e.g., piezoelectric sensors, pH electrodes). |
| Rail-to-Rail Input Range | Includes ground (−0.2 V) - permits single-supply operation with AC-coupled or DC-biased sensor inputs without external biasing. |
Applications
| Portable Gas Sensor Interface | Wearable Heart Rate Monitor Front-End |
|---|---|
Use Scenario: Amplifying microamp-level current from electrochemical gas cells operating on coin-cell batteries. IC Role / Device Role / Timing Role: Transimpedance amplifier converting sensor current to voltage with minimal power overhead. Use Value: 9 μA supply current extends battery life beyond 2 years; rail-to-rail output ensures full 0–3.3 V ADC range utilization. |
Use Scenario: Conditioning weak photoplethysmography (PPG) signals from green LEDs in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Low-noise, DC-coupled preamplifier rejecting ambient light interference while preserving pulse morphology. Use Value: 146 nV/√Hz input voltage noise at 5 V and −40°C to 85°C rating ensure reliable operation across environmental conditions. |
| Industrial Temperature Transmitter | Smart Home Motion Detector Signal Chain |
Use Scenario: Linearizing and amplifying RTD or thermistor outputs in 4–20 mA loop-powered field transmitters. IC Role / Device Role / Timing Role: Precision buffer and gain stage interfacing with 16-bit ΣΔ ADCs in isolated analog front-ends. Use Value: 1.5 mV max input offset voltage (25°C) and 4 μV/°C tempco minimize calibration drift over temperature. |
Use Scenario: Amplifying pyroelectric (PIR) sensor outputs in battery-operated occupancy sensors with multi-year lifetime requirements. IC Role / Device Role / Timing Role: High-input-impedance amplifier with adjustable gain for adaptive sensitivity tuning. Use Value: 1.7 nA input bias current prevents signal attenuation in high-Z PIR elements; SC-70 package saves board space in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Higher supply current (110 μA vs. 9 μA), wider GBW (1 MHz), same SC-70-5 package. | Better suited for higher-speed signal chains where power budget allows; not viable for multi-year battery operation. | Select LMV321IDBVR only when >10× bandwidth is required and system can accommodate 12× higher quiescent current. |
| TLV851DBVR | Lower supply current (420 nA), lower GBW (5.5 kHz), same SC-70-5 package and rail-to-rail I/O. | Optimized for ultra-low-power wake-up circuits and sub-Hz sensor monitoring; insufficient for active filter or PPG applications. | Choose TLV851DBVR for duty-cycled, event-triggered sensing where average current <1 μA is mandatory. |
Compared with LMV321IDBVR and TLV851DBVR, LPV321DCKR uniquely balances sub-10-μA quiescent current with 152-kHz bandwidth and robust rail-to-rail performance-making it the optimal choice for always-on, medium-bandwidth analog signal conditioning in space-constrained, battery-limited designs.
Availability
LPV321DCKR is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and smart home occupancy detectors requiring stable component supply across extended production lifecycles.
Supply support for LPV321DCKR 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 op-amps and low-power signal chain solutions.
The LPV321DCKR belongs to TI's LPV3xx family of low-voltage, low-power op-amps designed specifically for cost-sensitive, space-constrained applications where rail-to-rail operation and nanoamp-level quiescent current are critical.
FAQ
What is the maximum capacitive load the LPV321DCKR can drive without instability?
The LPV321DCKR is characterized as stable with capacitive loads up to 1000 pF, as confirmed in the datasheet Figure 14 and 15 frequency response plots. This eliminates the need for series isolation resistors when driving sampling capacitors, long traces, or LCD bias networks-reducing component count and board area in compact designs. For loads exceeding 1000 pF, external compensation may be required.
Does the LPV321DCKR support true rail-to-rail input operation?
The LPV321DCKR features rail-to-rail output but not rail-to-rail input: its input common-mode voltage range extends from −0.2 V to VCC+ − 0.8 V. This allows ground-referenced inputs (e.g., thermocouples, current-sense shunts) but excludes direct connection to VCC+ without attenuation. The −0.2 V lower limit enables operation with small negative bias voltages in single-supply configurations.
What is the typical input offset voltage of the LPV321DCKR at room temperature and 5 V supply?
At TA = 25°C and VCC = 5 V, the LPV321DCKR has a typical input offset voltage of 1.5 mV, with a maximum of 7 mV across the full −40°C to 85°C operating range. This specification is critical for precision DC-coupled applications such as RTD linearization and strain gauge bridges, where offset directly impacts measurement accuracy before calibration.
Can the LPV321DCKR operate from a 2.7-V supply while maintaining full rail-to-rail output swing?
Yes-the LPV321DCKR is fully specified at 2.7 V, delivering rail-to-rail output swing within 100 mV of each rail at 100-kΩ load (VCC+ − 0.100 V / VCC− + 0.080 V). This capability enables seamless integration into 3.3-V and 2.7-V battery-powered systems without sacrificing dynamic range, making it ideal for energy-harvesting and coin-cell applications.
Is the LPV321DCKR pin-compatible with other members of the LPV3xx family?
No-LPV321DCKR (single-channel, SC-70-5) is not pin-compatible with LPV358 (dual, SOIC/VSSOP-8) or LPV324 (quad, SOIC/TSSOP-14). Each variant uses distinct pinouts and package footprints. However, all share identical electrical specifications and functional behavior per channel, enabling scalable design reuse across channel-count requirements.
LPV321DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.1V/µs
- Gain Bandwidth Product:
- 237 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 9µA
- Current - Output / Channel:
- 72 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LPV321DCKR FAQ
1.How can I place an order for LPV321DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321DCKR 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 LPV321DCKR reliable?
The price and inventory of LPV321DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321DCKR is usually 5 days.
3.What payment methods are accepted for LPV321DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321DCKR?
LPV321DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321DCKR 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 LPV321DCKR?
For technical support, including LPV321DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321DCKR requirements.
6.How does Aetrix verify that LPV321DCKR is sourced from the original manufacturer or authorized distributors?
All LPV321DCKR 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 LPV321DCKR meets industry standards.
7.What is the process for return or replacement of LPV321DCKR?
All LPV321DCKR units undergo pre-shipment inspection (PSI). If there is an issue with LPV321DCKR, 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 LPV321DCKR part is unused and in its original packaging.
Return procedure for LPV321DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPV321DCKR Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM324PWR
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LM2902DR
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LM358P
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