My Inquiry
My Account
Texas Instruments LM321LVIDCKR
- Part No.:
- LM321LVIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM321LVIDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:28,801
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM321LVIDCKR from Texas Instruments is a single-channel, low-voltage operational amplifier designed for cost-sensitive, battery-powered systems. It operates from 2.7 V to 5.5 V, delivers ±1 mV input offset voltage, 1 MHz unity-gain bandwidth, 40 nV/√Hz input voltage noise density, and consumes only 90 µA per channel. It serves as a precision signal conditioner in low-side current sensing and sensor front-ends.
For engineers reviewing the LM321LVIDCKR datasheet, LM321LVIDCKR pinout, LM321LVIDCKR application, or LM321LVIDCKR equivalent, this page provides verified electrical specifications, SC70-5 package details, real-world use cases in power management and environmental sensing, and validated alternative options for design flexibility and supply continuity.
Technical Context
The LM321LVIDCKR uses a P-channel input differential pair enabling rail-to-rail common-mode input range down to the negative supply (including ground), with an auxiliary N-channel pair preventing phase reversal during overdrive. Its internal architecture ensures unity-gain stability without external compensation.
It features EMI rejection ratio (EMIRR+) up to 120 dB at 100 MHz, robust 2-kV HBM ESD protection, and guaranteed operation across –40°C to +125°C. Electrical characteristics-including open-loop gain (110–125 dB), PSRR (80–100 dB), and CMRR (63–92 dB)-are specified over full supply (2.7–5.5 V) and temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, 3.3 V logic, and dual-supply ±2.75 V operation without level-shifting. |
| Input Offset Voltage | ±1 mV (typ) - enables accurate DC-coupled amplification in sensor signal chains with ≤0.1% initial error at room temperature. |
| Unity-Gain Bandwidth | 1 MHz - sufficient for anti-aliasing filtering, active low-pass stages up to ~100 kHz, and stable closed-loop gain ≥1 configurations. |
| Quiescent Current | 90 µA per channel - allows continuous operation in always-on battery monitors and IoT endpoint nodes with multi-year runtime. |
| Input Voltage Noise | 40 nV/√Hz at 1 kHz - suitable for conditioning low-level signals from thermistors, RTDs, and bridge sensors without dominating system noise floor. |
| Common-Mode Input Range | Extends to V− (ground) and within 1 V of V+ - permits direct interface with grounded shunt resistors and single-supply transducer outputs. |
| Output Voltage Swing | Within 40–75 mV of V− and 1 V of V+ - delivers usable dynamic range in 3.3 V systems with rail-referenced loads. |
Pinout & Package
LM321LVIDCKR is housed in a 5-pin SC70 (DCK) package measuring 1.25 mm × 2.00 mm, optimized for space-constrained portable and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN+ | Noninverting input | Accepts reference or sensor signal; high impedance (>1012 Ω) minimizes loading on high-Z sources like thermocouples. |
| 2: V− | Negative supply / ground | Reference node for single-supply operation; must be connected directly to PCB ground plane for noise immunity. |
| 3: IN− | Inverting input | Feedback node for closed-loop configurations; matched input bias current (±15 pA) reduces offset drift in precision integrators. |
| 4: OUT | Amplifier output | Drives 2 kΩ minimum load; slew rate of 1.5 V/µs supports 10-bit settling in <5 µs for ADC front-end buffering. |
| 5: V+ | Positive supply | Accepts 2.7–5.5 V; internal ESD diodes clamp transients to rails-external series resistors recommended for >10 mA surge events. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal under overdrive | Eliminates output latch-up during input overvoltage events-critical for fault-tolerant current-sense and motor-control feedback loops. |
| Extended temperature range | –40°C to +125°C operation validated - enables deployment in automotive cabin modules, industrial HVAC controllers, and outdoor sensor nodes. |
| Low broadband noise | 40 nV/√Hz spectral density - preserves SNR in 20-bit ADC interfaces where amplifier noise dominates quantization error. |
| EMI rejection ratio | ≥100 dB from 100 MHz to 1 GHz - suppresses RF interference from Bluetooth/Wi-Fi coexistence in compact consumer electronics layouts. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in gain-of-1 buffers and active filters. |
Applications
| Low-Side Current Sensing | Environmental Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Monitoring battery discharge current in cordless power tools using a 100 mΩ shunt resistor referenced to ground. IC Role / Device Role / Timing Role: Amplifies millivolt-level shunt voltage with 35× gain, delivering 0–3.5 V output to an MCU's ADC. Use Value: Enables accurate state-of-charge estimation with <1% gain error and no phase reversal during motor startup surges. |
Use Scenario: Amplifying output of a 10 kΩ NTC thermistor in HVAC temperature feedback circuits. IC Role / Device Role / Timing Role: Configured as noninverting amplifier with 10× gain and 0.1 Hz–10 Hz low-pass filtering. Use Value: Delivers stable, low-drift output with 40 nV/√Hz noise-maintaining ±0.5°C accuracy over –20°C to +85°C ambient. |
| Uninterruptible Power Supply (UPS) Monitoring | Rack-Mount Server Voltage Supervision |
|
Use Scenario: Detecting AC mains failure by conditioning rectified line voltage and triggering backup battery switchover. IC Role / Device Role / Timing Role: Comparator input buffer with rail-to-rail input range, rejecting common-mode ripple on 12 V DC bus. Use Value: Reliable detection at 2.7 V supply enables operation during brownout conditions before system reset. |
Use Scenario: Scaling 12 V, 5 V, and 3.3 V rail voltages to 0–3.3 V for ADC monitoring in enterprise server motherboards. IC Role / Device Role / Timing Role: Precision attenuator with matched resistor network and low offset to minimize scaling error. Use Value: ±1 mV offset contributes <0.03% error in 3.3 V full-scale measurement-meeting IPC-9592 Class 2 tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDCKR | Lower input offset (0.75 mV typ), higher GBW (1 MHz), but 150 µA IQ - 67% higher quiescent current than LM321LVIDCKR. | Better DC precision for high-resolution data acquisition; less suitable for ultra-low-power always-on monitoring. | Choose TLV9001IDCKR when offset drift and long-term stability outweigh battery life requirements. |
| LM321MFX/NOPB | Same core architecture but in SOT-23-5 package; wider offset range (±3 mV max vs ±1 mV typ); identical 90 µA IQ and 1 MHz GBW. | Compatible for footprint-limited designs where ±3 mV offset is acceptable; not drop-in due to different thermal pad and pinout. | Choose LM321MFX/NOPB when legacy SOT-23 compatibility is prioritized over SC70 size reduction and tighter offset spec. |
Compared with TLV9001IDCKR and LM321MFX/NOPB, LM321LVIDCKR offers the lowest quiescent current among SC70-packaged alternatives while maintaining industry-standard offset and bandwidth-making it optimal for space- and energy-constrained industrial sensor nodes where long-term reliability is critical.
Availability
LM321LVIDCKR is available at Aetrix Electronics and suitable for low-power sensor interfaces, battery management systems, and industrial control signal conditioning requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM321LVIDCKR 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 op amp innovation and broad industrial qualification.
The LM3xxLV family-including LM321LVIDCKR-is engineered for cost-optimized, low-voltage general-purpose amplification in battery-powered and single-supply systems, emphasizing robustness, ESD immunity, and wide-temperature operation.
FAQ
What is the maximum operating temperature for LM321LVIDCKR?
The LM321LVIDCKR is fully specified from –40°C to +125°C junction temperature. Its electrical characteristics-including input offset voltage, gain, and PSRR-are guaranteed across this range, making it suitable for under-hood automotive modules and industrial motor drives where ambient temperatures exceed 85°C.
Does LM321LVIDCKR support rail-to-rail input or output?
LM321LVIDCKR supports rail-to-rail input common-mode range (down to V− and within 1 V of V+), but its output swing is limited to within 40–75 mV of V− and 1 V of V+. It does not provide rail-to-rail output-designers must ensure headroom for the intended load and supply voltage.
Can LM321LVIDCKR replace LM321 in existing designs?
LM321LVIDCKR is not a direct replacement for legacy LM321 due to lower supply voltage range (2.7–5.5 V vs 3–32 V), different input stage architecture, and SC70 packaging. It replaces LM321 only in new low-voltage, space-constrained designs where its 90 µA IQ and ±1 mV offset provide measurable benefit.
What is the overload recovery time of LM321LVIDCKR?
The LM321LVIDCKR has a typical overload recovery time of 1 µs, defined as the time required for the output to return from saturation to linear operation after an overdrive event. This enables fast response in comparator-like applications and transient-heavy current-sense circuits.
Is LM321LVIDCKR qualified for automotive applications?
LM321LVIDCKR is not AEC-Q200 qualified. While it operates across –40°C to +125°C and includes 2-kV HBM ESD protection, it lacks automotive-specific stress testing, failure analysis reporting, and PPAP documentation required for Tier-1 automotive subsystems.
LM321LVIDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- -
- Current - Supply:
- 90µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM321LVIDCKR FAQ
1.How can I place an order for LM321LVIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM321LVIDCKR 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 LM321LVIDCKR reliable?
The price and inventory of LM321LVIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM321LVIDCKR is usually 5 days.
3.What payment methods are accepted for LM321LVIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM321LVIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM321LVIDCKR?
LM321LVIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM321LVIDCKR 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 LM321LVIDCKR?
For technical support, including LM321LVIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM321LVIDCKR requirements.
6.How does Aetrix verify that LM321LVIDCKR is sourced from the original manufacturer or authorized distributors?
All LM321LVIDCKR 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 LM321LVIDCKR meets industry standards.
7.What is the process for return or replacement of LM321LVIDCKR?
All LM321LVIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM321LVIDCKR, 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 LM321LVIDCKR part is unused and in its original packaging.
Return procedure for LM321LVIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM321LVIDCKR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
