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

STMicroelectronics TSV621AICT

Name: TSV621AICT
Brand: STMicroelectronics
SKU: TSV621AICT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSV621AICT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: TSV621AICT.pdf

Description:: IC OPAMP GP 1 CIRCUIT SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:1,053

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Product details

Overview

TSV621AICT from STMicroelectronics is a rail-to-rail input/output CMOS operational amplifier optimized for ultra-low-power, precision signal conditioning in battery-powered systems. It delivers 420 kHz gain bandwidth at 29 µA supply current (5 V), 800 µV max input offset voltage (A-grade), and operates from 1.5 V to 5.5 V across –40 °C to +125 °C. Its SC70-5 package supports compact portable medical sensors and wearable health monitors.

For engineers reviewing the TSV621AICT datasheet, TSV621AICT pinout, TSV621AICT application, or TSV621AICT equivalent, key selection criteria include verified rail-to-rail I/O swing under 35 mV from rails, guaranteed 420 kHz GBP at 5 V, A-grade offset voltage specification, SC70-5 thermal resistance (205 °C/W), and ESD robustness (4 kV HBM).

Technical Context

The TSV621AICT uses complementary PMOS/NMOS input pairs enabling rail-to-rail input common-mode range from (V_CC–) –0.1 V to (V_CC+) +0.1 V, with no phase reversal. Its unity-gain-stable architecture supports capacitive loads up to 100 pF without oscillation.

Internal trimming ensures tight parameter dispersion: supply current variation ±17%, minimum GBP = 350 kHz, minimum slew rate = 0.15 V/µs, and guaranteed CMRR ≥55 dB over full temperature range. Shutdown functionality is absent-TSV621 variants lack SHDN pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	1.5 V–5.5 V: Enables direct operation from single-cell Li-ion (3.0–3.7 V) or two alkaline cells (3.0 V), eliminating LDO dependency.
Gain Bandwidth Product	420 kHz typ @ 5 V: Supports anti-aliasing filtering up to ~66 kHz (f_−3dB ≈ GBP/2π) in sensor front-ends with <30 µA quiescent draw.
Input Offset Voltage	800 µV max (A version): Ensures ≤0.016% error in 5 V full-scale 12-bit ADC interfaces (LSB = 1.22 mV).
Rail-to-Rail Output Swing	≤35 mV from rails @ 10 kΩ load: Delivers >99% dynamic range utilization in 1.8 V–3.3 V microcontroller ADC reference buffers.
Input Bias Current	1 pA typ: Permits use with high-impedance pH electrodes (>100 MΩ) and photodiode transimpedance stages without significant leakage error.
ESD Robustness	4 kV HBM: Meets IEC 61000-4-2 Level 2 for handheld device touch interfaces and exposed sensor nodes.
Operating Temperature	–40 °C to +125 °C: Qualified for automotive cabin ambient sensing and industrial motor control feedback loops.

Pinout & Package

TSV621AICT is housed in a 5-pin SC70-5 (SOT323-5) micropackage with 0.65 mm pitch, 1.8 × 2.0 mm footprint, and 205 °C/W junction-to-ambient thermal resistance.

Pin/Terminal	Circuit Role	Design Meaning
1	V_CC+	Positive supply rail: Must be decoupled with 10 nF capacitor placed ≤1 mm from pin per layout guidelines.
2	In−	Inverting input: High-impedance node; guard ring recommended for <1 pA bias current integrity.
3	In+	Non-inverting input: Rail-to-rail common-mode range extends 0.1 V beyond supply rails.
4	Out	Amplifier output: Capable of sourcing/sinking ≥40 mA (5 V), stable driving 100 pF capacitive loads.
5	V_CC−	Negative supply rail / ground: Low-inductance return path critical for noise-sensitive precision applications.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full-supply-range signal acquisition and drive in 1.8 V systems, maximizing ADC utilization without level-shifting.
A-grade precision offset	800 µV max offset ensures <0.02% gain error in 4–20 mA transmitter loop receivers using 250 Ω shunt.
Ultra-low 29 µA supply current	Extends coin-cell lifetime to >10 years in always-on environmental sensors (e.g., CO₂ monitors with 1 sample/sec duty cycle).
Unity-gain stability	Eliminates need for external compensation in voltage-follower configurations used for sensor buffering and reference isolation.
Extended temperature range	Validated operation from –40 °C to +125 °C supports deployment in engine bay pressure sensors and industrial PLC analog inputs.

Applications

Medical Biosensor Front-End

Portable Gas Detector Signal Chain

Use Scenario: Amplifying low-amplitude electrochemical signals (e.g., glucose oxidase reaction currents) in disposable test strips.

IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 GΩ feedback resistor, providing DC-coupled gain while rejecting electrode polarization drift.

Use Value: 1 pA input bias current prevents measurement error on high-impedance working electrodes; rail-to-rail output drives 12-bit SAR ADC directly at 1.8 V.

Use Scenario: Conditioning ppm-level analog outputs from NDIR CO sensor modules in handheld air quality meters.

IC Role / Device Role / Timing Role: Precision DC-coupled amplifier stage with programmable gain, followed by active low-pass filtering before ADC sampling.

Use Value: 800 µV max offset contributes <0.04% FSR error in 0–1000 ppm range; 420 kHz GBP allows 10 Hz filter cutoff with >60 dB attenuation at 60 Hz EMI.

Wearable Heart Rate Monitor Analog Path

Industrial Thermocouple Cold-Junction Compensation

Use Scenario: Amplifying weak photoplethysmography (PPG) signals from green LED/photodiode pair in wrist-worn fitness trackers.

IC Role / Device Role / Timing Role: Low-noise, low-power instrumentation amplifier first stage with AC coupling and baseline restoration.

Use Value: 29 µA supply current enables continuous PPG acquisition for >7 days on 100 mAh battery; 4 kV HBM withstands ESD during user handling.

Use Scenario: Buffering and amplifying cold-junction thermistor voltage in Class I, Division 2 hazardous-location temperature transmitters.

IC Role / Device Role / Timing Role: Rail-to-rail input buffer isolating thermistor bridge from ADC input, rejecting common-mode noise on long sensor leads.

Use Value: –40 °C to +125 °C rating ensures reliability in oil/gas field enclosures; 55 dB min CMRR suppresses 50/60 Hz pickup on unshielded 10 m cables.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision rail-to-rail op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP6001T-I/OT	Higher 100 µA supply current; 1 MHz GBP; 2 mV max offset (non-A grade)	Lacks A-grade precision and sub-30 µA power; suitable only where higher speed offsets power penalty	Select when 1 MHz bandwidth is mandatory and 2 mV offset is acceptable in 12-bit systems.
TLV9001IDBVR	35 µA supply current; 1 MHz GBP; 1.6 mV max offset; includes shutdown pin	Includes SHDN but trades 0.8 mV offset tolerance and adds complexity for always-on sensor nodes	Prefer only if system-level power sequencing requires controlled amplifier enable/disable.

Compared with MCP6001T-I/OT and TLV9001IDBVR, TSV621AICT uniquely delivers A-grade 800 µV offset within 29 µA power envelope-critical for battery life and accuracy in portable medical devices where every microamp and millivolt matters.

Availability

TSV621AICT is available at Aetrix Electronics and suitable for portable medical diagnostics, handheld environmental monitoring, and industrial temperature sensing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSV621AICT 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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TSV62x series belongs to ST's precision low-power op-amp product line, engineered specifically for energy-constrained, high-accuracy signal conditioning in battery-operated instrumentation and sensor interface applications.

FAQ

What is the maximum capacitive load the TSV621AICT can drive without external compensation?

The TSV621AICT is unity-gain stable and can drive capacitive loads up to 100 pF directly without oscillation, as verified in the datasheet's AC performance section and application note AN4273. For loads exceeding 100 pF, a series resistor (10–100 Ω) between output and load is required to maintain phase margin above 45°.

Does the TSV621AICT have a shutdown pin?

No. The TSV621AICT lacks a shutdown (SHDN) pin-this feature is exclusive to the TSV620/TSV620A variants (6-pin SC70/SOT23). The TSV621 family is a 5-pin configuration optimized for simplicity and minimal board area in always-on applications.

How does the 800 µV max input offset voltage impact 12-bit ADC interfacing at 3.3 V full scale?

At 3.3 V full scale, a 12-bit ADC has an LSB of 803 µV. With 800 µV max offset, the TSV621AICT introduces ≤1 LSB of deterministic error-fully correctable via system calibration-and avoids clipping or dead-band issues common with higher-offset amplifiers.

Is the SC70-5 package of TSV621AICT RoHS and REACH compliant?

Yes. The TSV621AICT is manufactured in ST's ECOPACK®-compliant SC70-5 package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound as documented in ST's ECOPACK® database.

TSV621AICT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

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:: Rail-to-Rail

Slew Rate:: 0.14V/µs

Gain Bandwidth Product:: 420 kHz

-3db Bandwidth:: -

Current - Input Bias:: 1 pA

Voltage - Input Offset:: 800 µV

Current - Supply:: 29µA

Current - Output / Channel:: 74 mA

Voltage - Supply Span (Min):: 1.5 V

Voltage - Supply Span (Max):: 5.5 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

TSV621AICT FAQ

1.How can I place an order for TSV621AICT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSV621AICT 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 TSV621AICT reliable?

The price and inventory of TSV621AICT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSV621AICT is usually 5 days.

3.What payment methods are accepted for TSV621AICT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSV621AICT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSV621AICT?

TSV621AICT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSV621AICT 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 TSV621AICT?

For technical support, including TSV621AICT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSV621AICT requirements.

6.How does Aetrix verify that TSV621AICT is sourced from the original manufacturer or authorized distributors?

All TSV621AICT 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 TSV621AICT meets industry standards.

7.What is the process for return or replacement of TSV621AICT?

All TSV621AICT units undergo pre-shipment inspection (PSI). If there is an issue with TSV621AICT, 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 TSV621AICT part is unused and in its original packaging.

Return procedure for TSV621AICT:

1.Submit a request within 90 days.

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

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