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Texas Instruments LPV321DCKRE4
- Part No.:
- LPV321DCKRE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LPV321DCKRE4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,476
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Product details
Overview
LPV321DCKRE4 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, 7 mV input offset voltage, 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 medical devices.
For engineers reviewing the LPV321DCKRE4 datasheet, LPV321DCKRE4 pinout, LPV321DCKRE4 application, or LPV321DCKRE4 equivalent, key selection criteria include its SC-70-5 package footprint, −40°C to 85°C operating range, stable operation with 1000-pF capacitive loads, and compatibility with ground-referenced input signals across the full common-mode range (−0.2 V to VCC+ − 0.8 V).
Technical Context
The LPV321DCKRE4 employs a CMOS input stage enabling nanoampere-level input bias current (1.7–50 nA) and wide input common-mode range extending below ground. Its internal compensation ensures unity-gain stability without external components while maintaining phase margin ≥71° at 5 V with 22-pF load.
This device belongs to TI's LPV3xx family-a low-power derivative of the LMV3xx series-designed specifically for cost-sensitive, space-constrained systems where quiescent current, rail-to-rail output drive, and robust ESD protection (2-kV HBM, 200-V MM) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5 V - supports direct connection to single-cell Li-ion or two-cell alkaline supplies without regulation. |
| Supply Current | 9 μA typical at 5 V - enables multi-year battery life in always-on sensor nodes. |
| Gain Bandwidth | 152 kHz - sufficient for DC-coupled instrumentation, active filters up to ~10 kHz, and low-frequency transducer signal conditioning. |
| Rail-to-Rail Output | VOH = VCC+ − 3.5 mV, VOL = VCC− + 90 mV at 100-kΩ - maximizes dynamic range in low-voltage ADC driver stages. |
| Input Offset Voltage | 7 mV typical - suitable for non-critical amplification where trimming is not required. |
| Common-Mode Range | −0.2 V to VCC+ − 0.8 V - allows direct sensing of signals referenced to ground in single-supply configurations. |
| Capacitive Load Drive | Stable with up to 1000 pF - eliminates need for isolation resistors when driving ADC inputs or long PCB traces. |
Pinout & Package
LPV321DCKRE4 is housed in a 5-pin SC-70 (DCK) package measuring 2.0 mm × 1.25 mm × 0.9 mm, optimized for high-density PCB layouts. The package is RoHS-compliant, green (no Sb/Br), and moisture sensitivity level (MSL) 1 rated for unlimited floor life at ≤30°C/60% RH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN− | Inverting input - accepts feedback network for closed-loop gain configuration. |
| 2 | IN+ | Non-inverting input - connects to reference or sensor signal source. |
| 3 | VCC− | Negative supply rail - typically connected to GND in single-supply operation. |
| 4 | VCC+ | Positive supply rail - powers internal circuitry; must be decoupled with 0.1-μF ceramic capacitor. |
| 5 | OUTPUT | Amplified output - drives loads ≥100 kΩ directly; requires series resistor for heavier capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| No Crossover Distortion | Ensures clean Class-AB output stage performance in audio and precision analog paths without notch distortion. |
| Latch-Up Immunity | Exceeds 100 mA per JESD 78 Class II - prevents destructive latch-up during transient overvoltage events. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - reduces need for external protection in handheld and wearable designs. |
| Low Input Bias Current | 1.7–50 nA - minimizes voltage error across high-impedance sensor bridges and photodiode interfaces. |
| Stable with Capacitive Loads | Operates reliably up to 1000 pF - simplifies layout by eliminating output isolation resistors in ADC buffer applications. |
Applications
| Portable Gas Sensor Interface | Wearable Heart Rate Monitor Front-End |
|---|---|
Use Scenario: Amplifying low-level mV-range signals from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier and DC-coupled gain stage with rail-to-rail output driving 12-bit SAR ADC. Use Value: 9 μA quiescent current extends battery life beyond 3 years; rail-to-rail swing preserves full ADC input range despite 2.7-V supply. | Use Scenario: Conditioning photoplethysmography (PPG) signals from optical heart rate sensors in fitness bands. IC Role / Device Role / Timing Role: Low-noise, low-power signal amplifier preceding AC-coupled bandpass filtering and digitization. Use Value: 146 nV/√Hz input voltage noise at 1 kHz and 1.7 nA input bias current minimize signal degradation from high-impedance photodiode sources. |
| Industrial Temperature Transmitter | Smart Home Motion Detector Signal Chain |
Use Scenario: Buffering and scaling output of RTD or thermistor-based temperature sensing circuits in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Precision voltage follower and level-shifter interfacing between sensor bridge and current-output DAC. Use Value: 7 mV input offset and −0.2 V to VCC+ − 0.8 V common-mode range enable accurate zero-point calibration and ground-referenced bridge excitation. | Use Scenario: Amplifying microvolt-level signals from passive infrared (PIR) motion sensors in battery-operated smart lighting controls. IC Role / Device Role / Timing Role: High-input-impedance, low-power preamplifier stage before window comparator and wake-up logic. Use Value: Nanoampere input bias current prevents loading of high-Z PIR element; 152 kHz GBW supports fast transient response to motion events. |
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 (18 μA vs. 9 μA), same SC-70-5 package and rail-to-rail output. | Better offset voltage (2.5 mV typ) but higher power consumption limits use in multi-year battery applications. | Select LMV321IDBVR only when lower offset is prioritized over quiescent current. |
| TLV2461CDBVR | Higher GBW (6.4 MHz), higher supply current (550 μA), same SC-70-5 footprint. | Designed for higher-speed signal chains (e.g., active filters >100 kHz); unsuitable for ultra-low-power systems. | Choose TLV2461CDBVR when bandwidth requirements exceed 152 kHz and power budget permits. |
Compared with LMV321IDBVR and TLV2461CDBVR, LPV321DCKRE4 uniquely balances sub-10-μA quiescent current, rail-to-rail output, and adequate bandwidth for DC–10 kHz sensor signal conditioning-making it optimal for energy-constrained, space-limited embedded analog front-ends.
Availability
LPV321DCKRE4 is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and smart home motion detectors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for LPV321DCKRE4 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 deep expertise in low-power design, precision signal chain, and industrial-grade reliability.
The LPV321DCKRE4 belongs to TI's LPV3xx low-voltage op-amp family, engineered specifically for cost-effective, ultra-low-power signal conditioning in battery-operated and space-constrained systems.
FAQ
What is the operating temperature range for LPV321DCKRE4?
The LPV321DCKRE4 is specified for operation from −40°C to +85°C. This commercial-grade temperature range is validated per TI's SLOS433I datasheet and applies to all electrical characteristics unless otherwise noted. It does not support the extended −40°C to +125°C range offered by the LPV321I variant (e.g., LPV321IDCKRE4). For automotive or industrial ambient environments exceeding 85°C, the LPV321I series must be selected.
Does LPV321DCKRE4 support rail-to-rail input operation?
No, LPV321DCKRE4 does not support rail-to-rail input. Its input common-mode voltage range is specified as −0.2 V to VCC+ − 0.8 V, meaning the inputs can operate 0.2 V below ground and up to 0.8 V below the positive rail. While this includes ground-referenced signals in single-supply use, it does not extend fully to VCC+. True rail-to-rail input capability requires alternative devices such as the TLV9001 or OPA316.
Can LPV321DCKRE4 drive a 1000-pF capacitive load without oscillation?
Yes, LPV321DCKRE4 is explicitly characterized for stability with capacitive loads up to 1000 pF, as confirmed in the SLOS433I datasheet (Section "Stable With Capacitive Load of 1000 pF"). This eliminates the need for an output isolation resistor in applications such as ADC input buffering or long-trace routing-provided the load remains purely capacitive and no additional inductive elements are introduced in the path.
What is the maximum supply voltage for LPV321DCKRE4?
The absolute maximum supply voltage for LPV321DCKRE4 is 5.5 V (VCC+ − VCC−), per the Absolute Maximum Ratings table in the SLOS433I datasheet. However, recommended operation is limited to 2.7 V to 5 V. Operation above 5 V risks permanent damage and invalidates all parametric guarantees-including input offset, bandwidth, and output swing-making 5 V the practical upper limit for reliable system design.
How does the ESD rating of LPV321DCKRE4 compare to standard industry requirements?
LPV321DCKRE4 exceeds JEDEC-standard ESD thresholds: 2000-V Human-Body Model (HBM), 200-V Machine Model (MM), and 1000-V Charged-Device Model (CDM). These ratings meet or exceed typical IEC 61000-4-2 Level 2 (4-kV contact) system-level requirements when combined with proper board-level protection, making it suitable for consumer and industrial end-equipment without additional input-stage ESD clamps in most cases.
LPV321DCKRE4 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:
- -
- 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
LPV321DCKRE4 FAQ
1.How can I place an order for LPV321DCKRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321DCKRE4 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 LPV321DCKRE4 reliable?
The price and inventory of LPV321DCKRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321DCKRE4 is usually 5 days.
3.What payment methods are accepted for LPV321DCKRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321DCKRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321DCKRE4?
LPV321DCKRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321DCKRE4 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 LPV321DCKRE4?
For technical support, including LPV321DCKRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321DCKRE4 requirements.
6.How does Aetrix verify that LPV321DCKRE4 is sourced from the original manufacturer or authorized distributors?
All LPV321DCKRE4 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 LPV321DCKRE4 meets industry standards.
7.What is the process for return or replacement of LPV321DCKRE4?
All LPV321DCKRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LPV321DCKRE4, 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 LPV321DCKRE4 part is unused and in its original packaging.
Return procedure for LPV321DCKRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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