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LMX321ICT
STMicroelectronics
IC OPAMP GP 1 CIRCUIT SC70-5
38368 Pcs New Original In Stock
General Purpose Amplifier 1 Circuit Rail-to-Rail SC-70-5
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Minimum 1
5.0 / 5.0
- (325 Ratings)
LMX321ICT
Product Overview
12876792
DiGi Electronics Part Number
LMX321ICT-DGManufacturer
STMicroelectronics
LMX321ICT
Description
IC OPAMP GP 1 CIRCUIT SC70-5Inventory
38368 Pcs New Original In Stock
General Purpose Amplifier 1 Circuit Rail-to-Rail SC-70-5
Quantity
Minimum 1
Minimum 1
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LMX321ICT Technical Specifications
Category
Linear, Amplifiers, Instrumentation, Op Amps, Buffer Amps
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Amplifier Type
General Purpose
Number of Circuits
1
Output Type
Rail-to-Rail
Slew Rate
0.7V/µs
Gain Bandwidth Product
1.3 MHz
Current - Input Bias
27 nA
Voltage - Input Offset
4 mV
Current - Supply
130µA
Current - Output / Channel
70 mA
Voltage - Supply Span (Min)
2.3 V
Voltage - Supply Span (Max)
5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
5-TSSOP, SC-70-5, SOT-353
Supplier Device Package
SC-70-5
Base Product Number
LMX321
Datasheet & Documents
HTML Datasheet
LMX321ICT-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.33.0001
Additional Information
Other Names
497-13036-6
-497-13036-6
497-13036-1
497-13036-2
-497-13036-2
-497-13036-1
Standard Package
3,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
J'apprécie énormément l'utilisation d'emballages respectueux de l'environnement, cela reflète une vraie responsabilité sociale.
December 02, 2025
Grâce à leur livraison ultra rapide, j’ai pu profiter de mes achats dès le lendemain.
December 02, 2025
Their delivery times are consistently quick, making procurement hassle-free.
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Frequently Asked Questions (FAQ)
Can the LMX321ICT be used in low-voltage battery-powered sensor applications where supply voltage drops to 2.4V, and how does it maintain rail-to-rail output performance under these conditions?
Yes, the LMX321ICT is well-suited for low-voltage battery-powered sensor applications operating down to 2.3V, as specified in its supply voltage range. Its rail-to-rail output stage ensures maximum dynamic range even at low voltages, allowing signals to swing within about 10 mV of each supply rail under light loads. For reliable performance, ensure the load impedance is ≥10 kΩ to minimize output saturation effects. Also, monitor input common-mode range limitations: while the output is rail-to-rail, the input common-mode range includes the negative rail but not the positive supply, so inputs must stay at least 1V below V+ to avoid phase reversal or distortion. This makes the LMX321ICT ideal for single-supply systems like portable health sensors or IoT nodes using coin-cell or Li-ion batteries.
What are the stability risks when driving capacitive loads with the LMX321ICT, and how can I prevent oscillation in PCB layout?
The LMX321ICT can become unstable when directly driving capacitive loads above 100 pF due to phase margin reduction, leading to ringing or oscillation. This is a common issue in long trace runs or when buffering ADC inputs. To mitigate this, use a small series resistor (22–100 Ω) between the amplifier output and the capacitive load to isolate the capacitance and improve phase margin. Additionally, minimize PCB trace capacitance by reducing length and avoiding parallel routing over ground planes. Avoid placing decoupling capacitors directly at the output; instead, place them near power pins. For loads >1 nF, consider using a voltage follower with an isolation resistor or a unity-gain stable amplifier with higher drive capability, though the LMX321ICT’s 70 mA output current helps dampen moderate capacitive effects if properly isolated.
How does the LMX321ICT compare to the TLV2461IDBVR in terms of power consumption and noise for a precision analog front-end design?
The LMX321ICT draws only 130 µA typical supply current, making it more power-efficient than the TLV2461IDBVR, which consumes around 210 µA. Both are rail-to-rail output amplifiers, but the LMX321ICT offers superior input bias current (27 nA vs. ~150 pA for the TLV2461), though the latter has significantly lower voltage noise (11 nV/√Hz vs. ~50 nV/√Hz estimated for LMX321ICT based on its 1.3 MHz GBW). For precision low-frequency sensor conditioning (e.g., strain gauges), the TLV2461IDBVR may offer better noise performance, but for ultra-low power, moderate accuracy systems like smoke detectors or wearable sensors, the LMX321ICT provides a better trade-off. Additionally, the LMX321ICT's wider temperature range (−40°C to 125°C) suits automotive and industrial environments where reliability under thermal stress is critical.
Is the SC-70-5 package of the LMX321ICT suitable for automated assembly, and what PCB layout practices prevent soldering defects?
Yes, the SC-70-5 package of the LMX321ICT is suitable for automated SMT assembly, especially given its MSL-1 rating, which allows indefinite exposure to ambient conditions before soldering. However, due to its small footprint and 0.5mm pin pitch, careful PCB design is essential. Use solder mask-defined pads with 0.2–0.3mm solder mask dams to prevent bridging. Include thermal relief for the center pad if present, though the SC-70-5 typically lacks an exposed thermal pad. Ensure accurate stencil aperture design (0.4mm × 0.2mm) to control solder volume and avoid tombstoning. Inspect profiled reflow settings: peak temperature should not exceed 260°C for more than 30 seconds. Avoid hand soldering due to high risk of shorting adjacent pins; use rework stations with precision nozzles if needed.
Can the LMX321ICT replace the MCP6001 in existing designs, and what design adjustments are required to ensure compatibility?
The LMX321ICT can generally replace the MCP6001 in low-power, general-purpose applications, as both are single-supply, rail-to-rail output op-amps with similar GBW (1.3 MHz vs. 1 MHz) and supply ranges (2.3–5.5V vs. 1.8–6.0V). However, key differences require attention: the LMX321ICT has higher input offset voltage (4 mV vs. 1.5 mV max for MCP6001), which may affect precision DC accuracy in gain stages. Also, the MCP6001 has slightly better ESD protection (±4 kV HBM vs. unspecified for LMX321ICT). To ensure compatibility, verify that your application can tolerate the higher offset—consider adding external offset trimming or AC-coupling if necessary. Confirm pin compatibility: both are in SC-70-5 packages with identical pinouts (input+, input−, output, V−, V+). Finally, ensure bypassing with a 100 nF ceramic capacitor close to V+ to maintain PSRR and stability, as with the MCP6001.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LMX321ICT CAD Models
STMicroelectronics LMX321ICT PCB symbols & footprints
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