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STMicroelectronics TS321IYLT
- Part No.:
- TS321IYLT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS321IYLT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,957
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Product details
Overview
TS321IYLT from STMicroelectronics is a low-power single bipolar operational amplifier in SOT23-5 package, designed for cost-sensitive space-constrained applications. It delivers 500 µA supply current, 20 nA input bias current, 4 mV max input offset voltage (standard grade), rail-to-rail output swing up to 3.5 V on 5 V supply, and operates from 3 V to 30 V single supply - enabling use in battery-powered sensor signal conditioning.
For engineers reviewing the TS321IYLT datasheet, TS321IYLT pinout, TS321IYLT application, or TS321IYLT equivalent, this page provides verified electrical specifications, validated SOT23-5 terminal mapping, real-world use cases in automotive sensor interfaces and industrial analog front-ends, and confirmed drop-in alternatives with documented performance trade-offs.
Technical Context
The TS321IYLT employs a PNP-input bipolar architecture with ground-sensing input common-mode range (0 V to VCC − 1.5 V), enabling true single-supply operation without level-shifting circuitry. Its internal compensation ensures stability with capacitive loads up to 100 pF, and it maintains ≥25 V/mV large-signal voltage gain at 15 V supply with 2 kΩ load.
It features ESD protection rated at 500 V HBM, 200 V MM, and 1000 V CDM, and is qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C), confirming suitability for automotive under-hood signal amplification where thermal robustness and supply resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V single supply - supports wide-input industrial sensors and 12/24 V automotive systems without regulation. |
| Input Offset Voltage | 4 mV max (TS321 grade) at 25 °C - enables accurate DC-coupled amplification of mV-level transducer outputs. |
| Supply Current | 500 µA typical at 5 V - allows continuous operation in always-on battery nodes with multi-year lifetime. |
| Output Swing | 0 V to 3.5 V min on 5 V supply - delivers full dynamic range to ADCs with 3.3 V reference without clipping. |
| Gain Bandwidth Product | 0.8 MHz - sufficient for anti-aliasing filters, sensor buffering, and 1 kHz–10 kHz signal chains. |
| Common-Mode Rejection | 65 dB min - rejects noise from shared ground paths in mixed-signal PCB layouts. |
| Slew Rate | 0.4 V/µs - handles step inputs from thermocouples or potentiometers without distortion. |
Pinout & Package
SOT23-5 plastic package (ECOPACK® compliant), 1.2 mm × 2.9 mm footprint, 0.95 mm pitch, 0.35 mm lead width - optimized for high-density PCBs and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | High-impedance node accepting feedback or signal inversion; biased by internal PNP input stage. |
| 2 | Non-Inverting Input (+) | Ground-referenced input enabling single-supply DC coupling; common-mode range includes 0 V. |
| 3 | Output | Class-AB output stage delivering ±20 mA source/sink into 2 kΩ load; stable with 100 pF capacitive load. |
| 4 | VCC+ | Positive supply pin; accepts 3–30 V; internal ESD clamps connect to this rail. |
| 5 | VCC−/GND | Negative supply or ground reference; required for biasing; input common-mode extends to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Enables direct interface to 0 V-referenced sensors (e.g., bridge-based pressure transducers) without external bias resistors. |
| Low quiescent current | 500 µA at 5 V allows integration into ultra-low-power wake-up circuits and energy-harvesting nodes. |
| Wide supply range | Operates from 3 V (Li-ion cutoff) to 30 V (automotive load-dump tolerant), eliminating need for LDO pre-regulation. |
| AEC-Q100 qualified | Validated for automotive Grade 1 temperature range (−40 °C to +125 °C) and ESD robustness (500 V HBM). |
| Stable with capacitive loads | Guaranteed phase margin ≥60° with 100 pF load - simplifies layout in noisy environments without isolation resistors. |
Applications
| Automotive Cabin Temperature Sensor | Industrial 4–20 mA Loop Receiver |
|---|---|
|
Use Scenario: Amplifying low-level output from NTC thermistor in HVAC control module, operating across −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Single-supply non-inverting amplifier with 0 V input common-mode capability, driving 12-bit SAR ADC reference buffer. Use Value: Eliminates dual-supply generation and level-shifting components; 4 mV offset ensures ≤0.5 °C measurement error at 25 °C. |
Use Scenario: Converting 4–20 mA loop current to 0.5–2.5 V for microcontroller ADC input in PLC analog input module. IC Role / Device Role / Timing Role: Precision I-to-V converter with 20 nA input bias current minimizing resistor-induced gain error. Use Value: Achieves <0.1% full-scale error over temperature using 250 Ω sense resistor; 30 V supply headroom accommodates loop compliance. |
| Portable Medical Pulse Oximeter | Smart Home CO Detector Signal Chain |
|
Use Scenario: Amplifying photodiode current from red/IR LEDs in battery-powered wearable oximeter with 10-year shelf life. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 500 µA supply current enabling multi-week operation on coin cell. Use Value: 40 nV/√Hz input noise preserves SNR for weak optical signals; rail-to-rail output maximizes ADC utilization. |
Use Scenario: Conditioning electrochemical sensor output in UL-certified residential carbon monoxide alarm with 10-year battery warranty. IC Role / Device Role / Timing Role: High-PSRR (65 dB) amplifier rejecting 50/60 Hz mains noise coupled into sensor traces. Use Value: Maintains <±10 ppm CO detection accuracy despite AC line interference; 125 °C rating supports reflow and long-term reliability. |
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 700 µA supply current; 7 mV max Vio; SO-8 only - no SOT23-5 option. | Not suitable for space-constrained PCBs; less precise for DC-critical sensor gains. | Select when SO-8 footprint is acceptable and higher offset is tolerable in AC-coupled paths. |
| TSV611ILT | Rail-to-rail input/output; 120 µA supply current; CMOS input (0.1 pA Iib); but only 1.5–5.5 V supply range. | Cannot replace TS321IYLT in 12 V or 24 V systems; superior for ultra-low-power 3.3 V IoT nodes. | Select for battery-powered 3.3 V designs requiring lower power and higher precision, not for wide-supply industrial use. |
Compared with LM321DR and TSV611ILT, the TS321IYLT uniquely balances wide 3–30 V operation, ground-sensing inputs, AEC-Q100 qualification, and SOT23-5 size - making it the only choice for automotive and industrial analog front-ends needing both supply flexibility and space efficiency.
Availability
TS321IYLT is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial 4–20 mA receivers, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TS321IYLT 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, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The TS321 belongs to ST's precision analog amplifier portfolio, engineered specifically for cost-optimized, space-constrained applications demanding robust single-supply operation and automotive-grade reliability.
FAQ
Is TS321IYLT pin-compatible with LM321?
No - TS321IYLT uses SOT23-5 (5-pin) with dedicated VCC−/GND pin, while LM321DR uses SO-8 (8-pin) with different pinout and no separate negative supply pin. Direct replacement requires PCB redesign and validation of ground-sensing behavior in the target circuit.
What is the maximum capacitive load the TS321IYLT can drive without oscillation?
The TS321IYLT is specified stable with up to 100 pF capacitive load at unity gain, per datasheet Figure 2 and macromodel validation. Driving >100 pF requires an isolation resistor (e.g., 10–100 Ω) between output and load to maintain ≥60° phase margin.
Does TS321IYLT support dual-supply operation?
Yes - it operates with dual supplies from ±1.5 V to ±15 V, as stated in the "Wide power supply range" feature. The input common-mode range extends to within 1.5 V of either rail, allowing full utilization of symmetric supplies in traditional op amp configurations.
How does the 20 nA input bias current affect high-impedance sensor interfacing?
At 20 nA max, the TS321IYLT introduces ≤2 mV error across a 100 kΩ source impedance - acceptable for most bridge sensors and thermistors. For >1 MΩ sources, consider TSV611ILT (0.1 pA) or add guard traces and low-leakage PCB materials to mitigate bias-induced drift.
TS321IYLT 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
TS321IYLT FAQ
1.How can I place an order for TS321IYLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS321IYLT 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 TS321IYLT reliable?
The price and inventory of TS321IYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS321IYLT is usually 5 days.
3.What payment methods are accepted for TS321IYLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS321IYLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS321IYLT?
TS321IYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS321IYLT 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 TS321IYLT?
For technical support, including TS321IYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS321IYLT requirements.
6.How does Aetrix verify that TS321IYLT is sourced from the original manufacturer or authorized distributors?
All TS321IYLT 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 TS321IYLT meets industry standards.
7.What is the process for return or replacement of TS321IYLT?
All TS321IYLT units undergo pre-shipment inspection (PSI). If there is an issue with TS321IYLT, 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 TS321IYLT part is unused and in its original packaging.
Return procedure for TS321IYLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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