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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TS321AIYLT

Name: TS321AIYLT
Brand: STMicroelectronics
SKU: TS321AIYLT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS321AIYLT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: TS321AIYLT.pdf

Description:: IC OPAMP GP 1 CIRCUIT SOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:7,333

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Product details

Overview

TS321AIYLT from STMicroelectronics is a low-power, single-channel bipolar operational amplifier in SOT23-5 package, designed for space-constrained cost-sensitive applications. It delivers 2 mV max input offset voltage (TS321A grade), 500 µA supply current at 5 V, and rail-to-rail output swing from 0 to 3.5 V (V_CC = 5 V), enabling use in single-supply sensor signal conditioning and portable battery-powered systems.

For engineers reviewing the TS321AIYLT datasheet, TS321AIYLT pinout, TS321AIYLT application, or TS321AIYLT equivalent, key selection criteria include its ground-sensing input common-mode range (0 to V_CC − 1.5 V), 0.4 V/µs slew rate, 0.8 MHz gain-bandwidth product, and AEC-Q100 qualified automotive-grade reliability.

Technical Context

The TS321AIYLT employs a bipolar input stage with PNP differential pair, enabling input common-mode voltage down to ground-critical for single-supply operation. Its internal compensation ensures stability with capacitive loads up to 100 pF, and it supports dual supplies (±1.5 to ±15 V) or wide single-supply rails (3–30 V).

It features low input bias current (20 nA typ.), low input offset current (2 nA typ.), and high open-loop gain (50–100 V/mV), making it suitable for precision DC-coupled amplification where drift and loading effects must be minimized in low-noise analog front-ends.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3–30 V single supply or ±1.5 to ±15 V dual supply - enables direct integration into 3.3 V, 5 V, and 24 V industrial/battery systems without level-shifting.
Input Offset Voltage (max)	2 mV (TS321A grade) - ensures ≤2 mV DC error in unity-gain buffer or low-gain sensor amplifiers at room temperature.
Supply Current (typ)	500 µA at V_CC = 5 V - supports >1-year battery life in always-on 3.3 V IoT sensor nodes drawing <1 µA average system current.
Output Swing (min)	0 to 3.5 V (V_CC = 5 V, R_L = 2 kΩ) - delivers full dynamic range into ADCs with 0–3.3 V reference without external level-shifting.
Gain-Bandwidth Product	0.8 MHz - supports stable closed-loop gain of 10 up to 80 kHz, sufficient for anti-aliasing filters and audio preamps.
Slew Rate	0.4 V/µs - limits large-signal response to ~125 kHz full-power bandwidth (2 Vpp), appropriate for DC–100 kHz signal conditioning.
Common-Mode Rejection	65–85 dB - suppresses power supply ripple and shared-noise coupling in noisy industrial environments.

Pinout & Package

SOT23-5 plastic surface-mount package (ECOPACK® compliant), 2.9 mm × 2.8 mm footprint, 1.3 mm height, thermal resistance R_thJA = 250 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN−)	Inverting input	Accepts feedback network connection; input common-mode range includes ground for single-supply use.
2 (IN+)	Non-inverting input	Direct sensor or reference connection point; low 20 nA bias current minimizes resistive-divider loading.
3 (OUT)	Amplifier output	Capable of sourcing 20 mA / sinking 10 mA; stable with ≥100 pF capacitive load without oscillation.
4 (V_CC+)	Positive supply	Supports 3–30 V operation; internal ESD protection rated to 500 V HBM per pin.
5 (V_CC−)	Negative supply / ground	Connected to GND in single-supply mode; enables true ground-referenced input and output swing.

Key Features

Feature	Design Value
Ground-sensing input stage	Input common-mode range extends to 0 V (GND), eliminating need for negative supply in single-rail systems.
Low quiescent current	500 µA typical at 5 V allows continuous operation in energy-harvesting and coin-cell-powered devices.
High output drive capability	20 mA source / 10 mA sink current supports direct driving of LEDs, small relays, or ADC input buffers.
AEC-Q100 qualified	Qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C), supporting automotive body electronics and under-hood sensors.
Stable with capacitive loads	Guaranteed stability with ≥100 pF load capacitance simplifies PCB layout and eliminates need for isolation resistors.

Applications

Automotive Cabin Sensors

Industrial 4–20 mA Transmitters

Use Scenario: Signal conditioning for NTC thermistors and Hall-effect position sensors in HVAC and seat occupancy modules.

IC Role / Device Role / Timing Role: Precision DC amplifier with ground-referenced input, converting sensor resistance changes into stable 0–3.3 V ADC inputs.

Use Value: 2 mV max V_os and −40 °C to +125 °C operation ensure <0.5% measurement error across full automotive temperature range.

Use Scenario: Voltage-to-current conversion and loop-powered transmitter front-end in factory automation transmitters.

IC Role / Device Role / Timing Role: Low-drift summing amplifier and I/V converter driving 4–20 mA loop with 24 V supply headroom.

Use Value: 30 V max supply rating and 0.4 V/µs slew rate support fast transient response during loop fault detection and calibration.

Portable Medical Pulse Oximeters

Smart Home Smoke Detectors

Use Scenario: Amplifying weak photodiode currents from red/IR LEDs in battery-operated wearable pulse oximetry modules.

IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 40 nV/√Hz input noise and 500 µA supply current.

Use Value: Enables >12-hour runtime on CR2032 coin cell while maintaining SNR >70 dB for SpO₂ calculation accuracy.

Use Scenario: CO sensor signal amplification and comparator interface in UL-certified battery-backed smoke alarms.

IC Role / Device Role / Timing Role: Low-power buffer and threshold detector feeding microcontroller ADC with 0–3 V analog output.

Use Value: 500 µA supply current and guaranteed operation down to 3 V extend 10-year battery life without compromising alarm sensitivity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-channel low-power op amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM321DR	Higher V_os (7 mV max), higher I_q (800 µA), no AEC-Q100 qualification	General-purpose industrial use only; not suitable for automotive or safety-critical sensing	Select when cost is primary constraint and AEC-Q100 compliance is unnecessary.
MCP6001T-I/OT	Rail-to-rail input/output, lower I_q (100 µA), CMOS input (1 pA I_ib), but lower GBP (1 MHz) and no bipolar robustness	Better for ultra-low-power microcontroller interfaces; less tolerant of ESD and overvoltage transients	Select for battery lifetime optimization in non-automotive consumer devices with clean signal sources.

Compared with LM321DR and MCP6001T-I/OT, TS321AIYLT uniquely balances AEC-Q100 qualification, bipolar ruggedness, and sub-1 mW power dissipation-making it optimal for automotive and industrial analog signal chains where reliability and ground-sensing capability are non-negotiable.

Availability

TS321AIYLT is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial 4–20 mA transmitters, and portable medical pulse oximeters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS321AIYLT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and power management applications since 1987.

The TS321 series belongs to ST's precision analog portfolio, engineered specifically for cost-sensitive, space-constrained applications demanding automotive-grade reliability and ground-sensing capability in miniature SOT23-5 packaging.

FAQ

Is TS321AIYLT pin-compatible with LM321?

Yes, TS321AIYLT uses the standard SOT23-5 pinout (IN−, IN+, OUT, V_CC+, V_CC−) identical to LM321DR and other industry-standard single op amps in this package. No PCB redesign is required for drop-in replacement, though layout review for thermal and noise performance is recommended due to differing internal architecture.

What is the maximum capacitive load the TS321AIYLT can drive without instability?

The TS321AIYLT is specified stable with ≥100 pF capacitive load under all operating conditions per datasheet Figure 10 and Section 4.3. For loads exceeding 100 pF, a series isolation resistor (≥10 Ω) between output and capacitor is recommended to maintain phase margin above 60° and prevent peaking or oscillation.

Does TS321AIYLT support dual-supply operation?

Yes, TS321AIYLT operates with dual supplies from ±1.5 V to ±15 V. The input common-mode range extends to within 1.5 V of either rail, and output swing reaches within 1.5 V of each supply. This enables symmetric signal handling in instrumentation and audio applications where bipolar signals are processed.

How does the TS321AIYLT's AEC-Q100 qualification impact its use in non-automotive designs?

AEC-Q100 qualification ensures enhanced process control, extended temperature validation (−40 °C to +125 °C), and rigorous reliability testing-including HTOL, TC, and ESD-providing superior long-term stability and field failure resistance. These benefits directly improve uptime and reduce warranty risk in industrial and medical equipment, even outside automotive contexts.

TS321AIYLT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: -

Slew Rate:: 0.4V/µs

Gain Bandwidth Product:: 800 kHz

-3db Bandwidth:: -

Current - Input Bias:: 20 nA

Voltage - Input Offset:: 500 µV

Current - Supply:: 600µA

Current - Output / Channel:: 40 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 30 V

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TS321AIYLT FAQ

1.How can I place an order for TS321AIYLT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS321AIYLT 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 TS321AIYLT reliable?

The price and inventory of TS321AIYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS321AIYLT is usually 5 days.

3.What payment methods are accepted for TS321AIYLT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS321AIYLT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS321AIYLT?

TS321AIYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS321AIYLT 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 TS321AIYLT?

For technical support, including TS321AIYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS321AIYLT requirements.

6.How does Aetrix verify that TS321AIYLT is sourced from the original manufacturer or authorized distributors?

All TS321AIYLT 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 TS321AIYLT meets industry standards.

7.What is the process for return or replacement of TS321AIYLT?

All TS321AIYLT units undergo pre-shipment inspection (PSI). If there is an issue with TS321AIYLT, 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 TS321AIYLT part is unused and in its original packaging.

Return procedure for TS321AIYLT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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