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Texas Instruments LPV321IDCKRE4
- Part No.:
- LPV321IDCKRE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LPV321IDCKRE4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,917
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Product details
Overview
LPV321IDCKRE4 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, input common-mode range extending to −0.2 V below VCC−, 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 LPV321IDCKRE4 datasheet, LPV321IDCKRE4 pinout, LPV321IDCKRE4 application, or LPV321IDCKRE4 equivalent, this page provides verified technical context, package-specific pin functionality, real-world application mappings, and validated alternative options for low-power analog front-end design under −40°C to +125°C operating conditions.
Technical Context
The LPV321IDCKRE4 employs a CMOS input stage with rail-to-rail output architecture, supporting operation down to 2.7 V while maintaining stable performance across −40°C to +125°C. Its input common-mode voltage range (−0.2 V to VCC+ − 0.8 V) includes ground, and it achieves 70 dB CMRR and 65 dB PSRR at 25°C with 5-V supply.
This device is internally compensated for unity-gain stability and remains stable driving capacitive loads up to 1000 pF - eliminating need for external compensation in most sensor buffering and active filter configurations. It exhibits no crossover distortion and supports rail-to-rail output swing into 100-kΩ loads, making it suitable for direct interfacing with SAR ADCs and low-voltage microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - enables direct operation from single-cell Li-ion or two-cell alkaline supplies without regulation. |
| Supply Current (Typ) | 9 μA at 5 V - reduces quiescent power to <45 μW, critical for multi-year battery life in IoT endpoints. |
| Gain-Bandwidth Product | 152 kHz - sufficient for DC–10 kHz signal conditioning in temperature, pressure, and biomedical sensors. |
| Rail-to-Rail Output Swing | VCC+ − 3.5 mV / VCC− + 90 mV at 100-kΩ - maximizes dynamic range when interfacing with 12-bit ADCs referenced to same supply. |
| Input Offset Voltage (Max) | 11 mV over −40°C to +125°C - ensures baseline accuracy in uncalibrated industrial sensor amplifiers. |
| 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, 200-V MM, 1000-V CDM - meets IEC 61000-4-2 Level 2 requirements for robustness in field-deployed equipment. |
Pinout & Package
LPV321IDCKRE4 is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 0.65 mm pitch, 0.9 mm max height - optimized for space-constrained portable and wearable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; drives 100-kΩ loads with <100 mV headroom to either rail. |
| 2 (IN−) | Inverting input | High-impedance CMOS node; supports precision feedback networks without loading error. |
| 3 (VCC−) | Negative supply | Ground reference terminal; must be connected to system GND or negative rail. |
| 4 (IN+) | Non-inverting input | Accepts input signals from −0.2 V to VCC+ − 0.8 V; enables single-supply sensor biasing. |
| 5 (VCC+) | Positive supply | Accepts 2.7 V–5 V; internal regulation not required; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 9 μA typical at 5 V - extends battery life in always-on sensor nodes beyond 10 years (e.g., coin-cell powered environmental monitors). |
| Rail-to-rail output | Swings to within 3.5 mV of VCC+ and 90 mV of VCC− - preserves full ADC input range without level-shifting circuitry. |
| Extended temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor infrastructure. |
| Stable with capacitive loads | Drives up to 1000 pF directly - eliminates need for isolation resistors in RC-filtered sensor inputs or DAC output buffers. |
| No crossover distortion | CMOS output stage ensures clean zero-crossing in AC-coupled audio and signal reconstruction paths. |
Applications
| Temperature Sensor Interface | Portable ECG Front-End |
|---|---|
|
Use Scenario: Amplifying low-level output (10–100 mV/°C) from thermistors or silicon bandgap sensors in HVAC controllers. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with gain = 10–100, configured for DC-coupled operation and offset trimming. Use Value: Input common-mode range including ground enables direct thermistor bridge connection; 9 μA supply current minimizes self-heating error. |
Use Scenario: Buffering and filtering biopotential signals (<5 mVpp) from dry electrodes in wearable heart-rate monitors. IC Role / Device Role / Timing Role: First-stage instrumentation buffer with high input impedance (>10¹² Ω) and rail-to-rail output driving 12-bit SAR ADC. Use Value: Rail-to-rail swing maximizes SNR into 3.3-V ADC; 152 kHz GBW supports >100 Hz bandwidth with noise shaping. |
| Low-Power Smoke Detector | Industrial 4–20 mA Loop Receiver |
|
Use Scenario: Amplifying photoelectric chamber current (nA-level) in battery-operated smoke alarms with 10-year shelf life. IC Role / Device Role / Timing Role: Transimpedance amplifier with feedback resistor ≥10 MΩ, operating from 3-V coin cell. Use Value: 1.7 nA input bias current (typ) prevents significant offset drift; 9 μA ICC enables >5-year runtime on CR2032. |
Use Scenario: Converting 4–20 mA loop current to 0.5–2.5 V for microcontroller ADC input in programmable logic controllers. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with 250-Ω shunt, referenced to system ground. Use Value: Input offset voltage ≤11 mV ensures <0.5% full-scale error across temperature; rail-to-rail output matches 3.3-V ADC range. |
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 VIO (2.5 mV typ) | Better for nano-power wake-up circuits; insufficient for >10 kHz sensor bandwidth | Select when ultra-low ICC dominates over speed and offset requirements |
| OPA316IDBVR | Higher supply current (400 μA), higher GBW (10 MHz), lower VIO (0.75 mV typ) | Supports high-speed data acquisition but increases power by 44× | Select when precision and bandwidth outweigh battery-life constraints |
Compared with TLV851IDCKR, LPV321IDCKRE4 offers 21× higher bandwidth for sensor signal conditioning without sacrificing rail-to-rail output; compared with OPA316IDBVR, it reduces supply current by 98% - enabling multi-year operation on primary cells where continuous sensing is required.
Availability
LPV321IDCKRE4 is available at Aetrix Electronics and suitable for temperature sensing, portable medical devices, and industrial loop receivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LPV321IDCKRE4 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 ICs and industrial-grade reliability.
The LPV321IDCKRE4 belongs to TI's LPV3xx low-voltage op-amp family - designed specifically for cost-sensitive, space-constrained, battery-powered systems where rail-to-rail performance and sub-10-μA quiescent current are mandatory.
FAQ
What is the maximum operating temperature for LPV321IDCKRE4?
The LPV321IDCKRE4 is rated for continuous operation from −40°C to +125°C, as confirmed in the "recommended operating conditions" table of the SLOS433I datasheet. This extended temperature grade (denoted by the 'I' suffix) qualifies it for under-hood automotive, industrial motor drives, and outdoor infrastructure applications where ambient temperatures exceed standard commercial ranges.
Does LPV321IDCKRE4 support rail-to-rail input?
No, LPV321IDCKRE4 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 down to 0.2 V below ground but only up to 0.8 V below the positive supply. This allows ground-referenced inputs but excludes direct connection to VCC+ without attenuation or level shifting.
What is the typical input bias current of LPV321IDCKRE4 at 25°C and 5 V supply?
The typical input bias current of LPV321IDCKRE4 is 2 nA at 25°C and 5 V supply, with a maximum of 65 nA over the full −40°C to +125°C range. This low bias current minimizes voltage errors in high-impedance sensor interfaces such as thermistor bridges or photodiode transimpedance amplifiers.
Can LPV321IDCKRE4 drive a 1000-pF capacitive load stably?
Yes, LPV321IDCKRE4 is explicitly characterized for stability with capacitive loads up to 1000 pF, as stated in the "Features" section and verified in Figure 14 and Figure 15 of the SLOS433I datasheet. No external isolation resistor or compensation network is required, simplifying layout in RC-filtered sensor or DAC output stages.
What package type and RoHS status does LPV321IDCKRE4 use?
LPV321IDCKRE4 uses the SC-70 (DCK) 5-pin package - measuring 2.0 mm × 1.25 mm with 0.65 mm pitch - and is RoHS-compliant with Green (Pb-Free, no Sb/Br) eco plan, per TI's packaging addendum. The 'E4' suffix denotes TI's standard green packaging with CU NIPDAU lead finish and MSL Level-1 rating.
LPV321IDCKRE4 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LPV321IDCKRE4 FAQ
1.How can I place an order for LPV321IDCKRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321IDCKRE4 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 LPV321IDCKRE4 reliable?
The price and inventory of LPV321IDCKRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321IDCKRE4 is usually 5 days.
3.What payment methods are accepted for LPV321IDCKRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321IDCKRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321IDCKRE4?
LPV321IDCKRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321IDCKRE4 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 LPV321IDCKRE4?
For technical support, including LPV321IDCKRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321IDCKRE4 requirements.
6.How does Aetrix verify that LPV321IDCKRE4 is sourced from the original manufacturer or authorized distributors?
All LPV321IDCKRE4 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 LPV321IDCKRE4 meets industry standards.
7.What is the process for return or replacement of LPV321IDCKRE4?
All LPV321IDCKRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LPV321IDCKRE4, 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 LPV321IDCKRE4 part is unused and in its original packaging.
Return procedure for LPV321IDCKRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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