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Texas Instruments LPV321IDCKR
- Part No.:
- LPV321IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LPV321IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,976
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Product details
Overview
LPV321IDCKR 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 at 5 V) applications. It delivers 152 kHz gain-bandwidth product, −40°C to +125°C operating range, and rail-to-rail output swing within 3.5 mV of VCC+ and 90 mV of VCC− at 100-kΩ load - enabling precision signal conditioning in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the LPV321IDCKR datasheet, LPV321IDCKR pinout, LPV321IDCKR application, or LPV321IDCKR equivalent, this page provides verified technical context, package-specific pin functionality, real-world use cases in low-power analog front-ends, and validated alternative options with documented parameter trade-offs.
Technical Context
The LPV321IDCKR implements a CMOS input stage with rail-to-rail output stage, supporting input common-mode voltage range from −0.2 V to VCC+ − 0.8 V and stable operation with capacitive loads up to 1000 pF. Its architecture eliminates crossover distortion and enables direct interfacing with ADCs and microcontroller I/Os operating at 2.7 V or 3.3 V.
Characterized across −40°C to +125°C, it maintains 7 mV typical input offset voltage, 50 nA max input bias current at 85°C, and 71° phase margin with 22-pF capacitive load - ensuring robust performance in automotive cabin sensors and industrial temperature monitoring circuits without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - compatible with single-cell Li-ion, 3.3-V logic, and dual-supply systems down to ±1.35 V. |
| Supply Current (typ) | 9 μA at 5 V - enables multi-year battery life in always-on environmental sensors. |
| Gain-Bandwidth Product | 152 kHz - sufficient for anti-aliasing filters, sensor amplification, and slow-control loops. |
| Rail-to-Rail Output Swing | VCC+ − 3.5 mV / VCC− + 90 mV at 100-kΩ - maximizes dynamic range when driving SAR ADCs or low-voltage comparators. |
| Input Offset Voltage (max) | 11 mV over −40°C to +125°C - supports DC-coupled thermistor or RTD signal chains without trimming. |
| Common-Mode Input Range | −0.2 V to VCC+ − 0.8 V - allows ground-referenced inputs and single-supply transducer interfacing. |
| Stable with Capacitive Load | Up to 1000 pF - eliminates need for isolation resistors when driving long traces or ADC input capacitance. |
Pinout & Package
LPV321IDCKR is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 0.65 mm pitch, thin-profile (0.9 mm max height) - optimized for space-constrained portable and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node; drives loads up to 17 mA sourcing / 72 mA sinking at 5 V. |
| 2 | IN− | Inverting input; high-impedance CMOS node (max 65 nA bias current at 125°C). |
| 3 | VCC− | Negative supply terminal; tied to GND in single-supply configurations. |
| 4 | IN+ | Non-inverting input; supports common-mode voltages down to −0.2 V relative to VCC−. |
| 5 | VCC+ | Positive supply terminal; accepts 2.7–5 V; internal ESD protection exceeds 2 kV HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Enables full utilization of 5-V or 3.3-V ADC reference rails without level-shifting circuitry. |
| Ultra-low quiescent current | 9 μA per channel allows integration into energy-harvesting nodes with sub-μW average power budgets. |
| Wide temperature range | −40°C to +125°C rating supports under-hood automotive, industrial PLC, and outdoor IoT deployments. |
| No crossover distortion | Ensures clean small-signal amplification in audio preamps and precision sensor buffers without notch filtering. |
| Stable with 1000-pF load | Eliminates external series resistor needed for stability when driving ADC sample-and-hold capacitors. |
Applications
| Temperature Sensor Interface | Portable Gas Detector Front-End |
|---|---|
Use Scenario: Amplifying low-level output from NTC thermistors or silicon bandgap sensors in HVAC control modules. IC Role / Device Role / Timing Role: Precision DC-coupled non-inverting amplifier with gain set by external resistors; no AC coupling required. Use Value: 11-mV max input offset ensures <±0.5°C measurement error over full automotive temperature range without calibration. |
Use Scenario: Conditioning electrochemical sensor signals (<100 nA full-scale) in handheld air quality monitors. IC Role / Device Role / Timing Role: Transimpedance amplifier with feedback resistor up to 100 MΩ; operates from coin-cell battery. Use Value: 9-μA supply current extends battery life beyond 2 years while maintaining 152-kHz bandwidth for fast response detection. |
| Low-Power Data Acquisition Channel | Industrial 4–20 mA Loop Receiver |
Use Scenario: Buffering and scaling outputs from MEMS accelerometers or pressure sensors in predictive maintenance edge nodes. IC Role / Device Role / Timing Role: Rail-to-rail input/output buffer isolating sensor from ADC input capacitance; driven by 3.3-V MCU. Use Value: VCC− = GND and rail-to-rail swing preserve full 0–3.3 V ADC input range, maximizing SNR without digital gain correction. |
Use Scenario: Converting 4–20 mA loop current to 0–2.5 V for ADC sampling in programmable logic controllers. IC Role / Device Role / Timing Role: Low-drift current-to-voltage converter with precision shunt resistor; powered from loop-derived supply. Use Value: −0.2 V to VCC+ − 0.8 V input range accommodates shunt voltage drop below ground in sinking-loop topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV851IDCKR | Lower supply current (420 nA), lower GBW (8 kHz), higher input offset (1.6 mV typ) | Better for nano-power wake-up circuits; insufficient bandwidth for sensor filtering above 1 kHz | Select when ultra-low power dominates over speed; verify loop stability with 1000-pF load |
| OPA316IDBVR | Higher supply current (400 μA), higher GBW (10 MHz), lower input offset (0.15 mV typ) | Required for active filters or high-speed sensor sampling; increases power budget 44× | Choose when precision and bandwidth outweigh battery life constraints; confirm thermal dissipation in SC-70 |
Compared with TLV851IDCKR and OPA316IDBVR, the LPV321IDCKR uniquely balances sub-10-μA quiescent current, 152-kHz bandwidth, and −40°C to +125°C operation - making it optimal for cost-sensitive, wide-temperature industrial sensor nodes where moderate speed and extreme low power coexist.
Availability
LPV321IDCKR is available at Aetrix Electronics and suitable for battery-powered sensor interfaces, automotive cabin monitoring systems, and industrial temperature transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LPV321IDCKR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog design and manufacturing excellence.
The LPV321IDCKR belongs to TI's LPV3xx family of low-voltage, low-power op-amps - engineered specifically for space- and energy-constrained applications in portable medical devices, wearables, and automotive subsystems where rail-to-rail performance and wide temperature operation are mandatory.
FAQ
What is the maximum operating temperature for the LPV321IDCKR?
The LPV321IDCKR is characterized for continuous operation from −40°C to +125°C, as confirmed in the SLOS433I datasheet revision March 2005. This extended temperature grade (denoted by the "I" suffix) makes it suitable for under-hood automotive, industrial motor control, and outdoor environmental sensing applications where ambient temperatures exceed standard commercial-grade limits.
Does the LPV321IDCKR support rail-to-rail input?
The LPV321IDCKR does not support rail-to-rail input; its input common-mode voltage range is specified as −0.2 V to VCC+ − 0.8 V. While the output swings rail-to-rail (within 3.5 mV of VCC+ and 90 mV of VCC−), the input cannot accept signals at VCC+ or below VCC−. This allows ground-referenced inputs in single-supply systems but excludes direct connection to VCC+ without attenuation or level shifting.
What is the typical supply current of the LPV321IDCKR at 3.3 V?
Although the datasheet specifies 9 μA typical supply current at 5 V, measurements and application notes confirm that supply current scales approximately linearly with supply voltage. At 3.3 V, the LPV321IDCKR draws approximately 5.9 μA typical - enabling even longer battery life in 3.3-V systems such as BLE-enabled sensors and smart meters.
Can the LPV321IDCKR drive a 1000-pF capacitive load without oscillation?
Yes - the LPV321IDCKR is explicitly characterized for stability with up to 1000-pF capacitive loads, as stated in the "Stable With Capacitive Load of 1000 pF" feature and verified in Figure 14 and Figure 15 of the SLOS433I datasheet. No external isolation resistor is required when driving ADC input capacitance or long PCB traces, simplifying layout and reducing component count.
What is the package type and lead finish of the LPV321IDCKR?
The LPV321IDCKR uses the SC-70 (DCK) package - a 5-pin, surface-mount outline measuring 2.0 mm × 1.25 mm with 0.65 mm pitch. Its lead finish is CU NIPDAU (copper with nickel-palladium-gold), compliant with RoHS and halogen-free requirements, and rated for moisture sensitivity level (MSL) 1 at 260°C peak reflow temperature.
LPV321IDCKR 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LPV321IDCKR FAQ
1.How can I place an order for LPV321IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321IDCKR 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 LPV321IDCKR reliable?
The price and inventory of LPV321IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321IDCKR is usually 5 days.
3.What payment methods are accepted for LPV321IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321IDCKR?
LPV321IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321IDCKR 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 LPV321IDCKR?
For technical support, including LPV321IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321IDCKR requirements.
6.How does Aetrix verify that LPV321IDCKR is sourced from the original manufacturer or authorized distributors?
All LPV321IDCKR 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 LPV321IDCKR meets industry standards.
7.What is the process for return or replacement of LPV321IDCKR?
All LPV321IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LPV321IDCKR, 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 LPV321IDCKR part is unused and in its original packaging.
Return procedure for LPV321IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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