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

STMicroelectronics TSU101RICT

Name: TSU101RICT
Brand: STMicroelectronics
SKU: TSU101RICT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSU101RICT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: TSU101RICT.pdf

Description:: IC OPAMP GP 1 CIRCUIT SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:2,904

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Product details

Overview

TSU101RICT from STMicroelectronics is a single-channel nanopower rail-to-rail input/output operational amplifier optimized for ultra-low-energy sensor signal conditioning. It delivers 580 nA typical supply current at 1.8 V, 8 kHz gain bandwidth, ±2 pA max input bias current at 25 °C, and operates across 1.5 V–5.5 V supply with –40 °C to 85 °C industrial temperature range-enabling multi-decade operation on coin-cell batteries in electrochemical gas sensors.

For engineers reviewing the TSU101RICT datasheet, TSU101RICT pinout, TSU101RICT application, or TSU101RICT equivalent, key selection criteria include sub-microamp quiescent current stability over voltage/temperature, rail-to-rail I/O swing at 1.5 V, low-frequency noise (8.1 µVpp, 0.1–10 Hz), and guaranteed phase-reversal-free operation in high-impedance sensing topologies.

Technical Context

The TSU101RICT employs complementary PMOS/NMOS input stages to achieve true rail-to-rail input common-mode range (VCC− −0.1 V to VCC+ +0.1 V) without phase reversal-a critical requirement for direct connection to high-impedance UV, pyroelectric, or electrochemical transducers. Its 8 kHz GBP and 3 V/ms slew rate are intentionally limited to minimize current consumption while preserving stability with >1 MΩ source impedances and capacitive loads up to 60 pF.

DC precision is maintained via low input offset voltage (±3.4 mV over temperature), 5 µV/°C drift, and <0.36 µV/√month long-term drift at 3.3 V-enabling accurate DC-coupled amplification in battery-powered medical instrumentation and RFID reader front-ends where calibration intervals exceed years.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current	580 nA typ. at 1.8 V - enables >42-year coin-cell lifetime in always-on PIR or gas sensor nodes
Gain Bandwidth Product	8 kHz - sufficient for DC–100 Hz sensor signals (e.g., ECG, CO₂, UV intensity) with minimal power penalty
Input Bias Current	2 pA max at 25 °C - preserves signal integrity from >1 GΩ source impedances (e.g., pH electrodes, photodiodes)
Rail-to-Rail I/O	VICM = VCC− −0.1 V to VCC+ +0.1 V; VOUT swing within 40 mV of rails - maximizes dynamic range at 1.5 V supply
Input Offset Voltage	±3.4 mV over –40 °C to 85 °C - supports uncalibrated 12-bit ADC interfacing in portable metering
Low-Frequency Noise	8.1 µVpp (0.1–10 Hz) - critical for stable baseline in electrochemical sensor amplifiers
EMI Rejection	88 dB at 900 MHz - suppresses RF interference in wireless-connected environmental monitors

Pinout & Package

TSU101RICT is housed in a 5-pin SC70 package (SOT23-5 compatible footprint), optimized for space-constrained battery-powered PCBs. Pin assignment follows standard op-amp topology with dedicated power, input, and output terminals.

Pin/Terminal	Circuit Role	Design Meaning
1 (VCC+)	Positive supply rail	Accepts 1.5–5.5 V; decoupling capacitor required within 1 mm for noise immunity
2 (IN+)	Non-inverting input	Rail-to-rail capable; connects directly to high-Z sensor anodes or reference dividers
3 (OUT)	Amplifier output	Drives 100 kΩ loads within 40 mV of rails; stable with 60 pF capacitive load
4 (VCC−)	Negative supply rail / ground	Must be tied to system ground; low-impedance return path essential for 2 pA bias current accuracy
5 (IN−)	Inverting input	Phase-reversal-free; used for precision feedback networks in transimpedance or difference amplifiers

Key Features

Feature	Design Value
Ultra-low quiescent current	580 nA typ. at 1.8 V - reduces battery drain to nanocoulombs per second in wake-up circuits
Rail-to-rail input stage	CMVR extends 0.1 V beyond rails - eliminates level-shifting ICs in single-supply 1.5 V systems
Phase-reversal immunity	Guaranteed no output inversion during input overdrive - prevents latch-up in PIR motion detectors
Low-frequency noise performance	8.1 µVpp (0.1–10 Hz) - enables sub-ppm resolution in potentiostatic gas sensor interfaces
EMI robustness	88 dB rejection at 900 MHz - maintains accuracy near GSM/Bluetooth antennas in portable readers

Applications

Electrochemical Gas Sensing

Battery Current Monitoring

Use Scenario: Detecting ppm-level CO or NO₂ using three-electrode amperometric cells with TIA configuration.

IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level sensor current to measurable voltage with <2 pA input bias.

Use Value: 2 pA max input bias minimizes offset error from electrode polarization; 8.1 µVpp noise ensures <0.1% full-scale error in 16-bit ADC digitization.

Use Scenario: Measuring µA–mA battery discharge current in IoT asset trackers using shunt resistor + differential amp.

IC Role / Device Role / Timing Role: Precision difference amplifier rejecting common-mode voltage while amplifying mV-level shunt drops.

Use Value: Rail-to-rail input accepts shunt voltage spanning 0–1.8 V; 580 nA ICC extends tracker sleep mode to >10 years on CR2032.

UV Index Monitoring

Pyroelectric PIR Motion Detection

Use Scenario: Conditioning output of silicon carbide UV photodiode in wearable sun exposure meters.

IC Role / Device Role / Timing Role: Non-inverting amplifier with gain ≥100, operating from 1.8 V coin cell.

Use Value: 8 kHz GBP provides adequate bandwidth for slow UV intensity changes; 580 nA ICC allows continuous sampling every 10 s for >15-year battery life.

Use Scenario: Amplifying microvolt-level signals from dual-element pyroelectric sensors in smart lighting controls.

IC Role / Device Role / Timing Role: AC-coupled instrumentation amplifier front-end with DC-blocking and gain staging.

Use Value: Phase-reversal immunity prevents false triggers during rapid ambient IR transients; 3 V/ms slew rate handles 10-Hz PIR pulses without distortion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanopower op amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC2050CS5#TRMPBF	Zero-drift architecture; 1.5 µV max Vio vs. TSU101RICT's ±3.4 mV; 1.5 µA ICC vs. 580 nA	Higher precision DC measurement (e.g., medical thermistor bridges); unsuitable for >10-year coin-cell life	Select when Vio drift <0.05 µV/°C is mandatory and power budget allows 3× higher ICC
OPA316IDBVR	100 µA ICC; 10 MHz GBP; 0.3 pA Iib - trades nanopower for speed and lower bias current	High-speed sensor sampling (e.g., ultrasonic time-of-flight); incompatible with multi-year battery operation	Select when bandwidth >100 kHz or sub-pA bias is required, and energy harvesting or rechargeable power is available

Compared with LTC2050CS5#TRMPBF and OPA316IDBVR, TSU101RICT uniquely balances sub-microamp ICC, rail-to-rail operation at 1.5 V, and phase-reversal immunity-making it the only viable choice for decade-long, maintenance-free deployment in electrochemical and passive infrared sensing nodes.

Availability

TSU101RICT is available at Aetrix Electronics and suitable for ultra-low-power sensor signal conditioning, battery current monitoring, and portable medical instrumentation requiring stable component supply across extended product lifecycles.

Supply support for TSU101RICT 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, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.

The TSU10x series belongs to ST's nanopower precision op amp product line, designed specifically for energy-harvesting and battery-operated systems where decades of maintenance-free operation and rail-to-rail functionality at sub-2 V supplies are non-negotiable.

FAQ

What is the maximum capacitive load the TSU101RICT can drive without instability?

The TSU101RICT remains unity-gain stable with up to 60 pF capacitive load when configured as a follower with 1 MΩ feedback resistor and 10 MΩ load resistance. For loads exceeding 60 pF, a series isolation resistor (Riso) of 1–10 kΩ is recommended per Figure 31 of DS9507 to maintain ≥60° phase margin and prevent peaking or oscillation.

Does the TSU101RICT support true single-supply operation down to 1.5 V?

Yes. The TSU101RICT operates fully specified from 1.5 V to 5.5 V, with rail-to-rail input extending 0.1 V beyond both supply rails and output swing within 40 mV of each rail at 1.5 V. All key parameters-including 580 nA ICC, 8 kHz GBP, and ±3.4 mV Vio-are guaranteed across this range and the full –40 °C to 85 °C temperature span.

How does the input bias current vary with common-mode voltage and temperature?

At 25 °C and mid-rail VICM (VCC/2), Iib is ≤2 pA. It rises to ≤30 pA at 85 °C and remains ≤4 pA at –40 °C. At low VICM (0 V), Iib increases to ≤10 pA at 85 °C; at high VICM (VCC), it reaches ≤30 pA. This behavior is documented in Figures 9–11 of DS9507 and confirms suitability for high-impedance sensor nodes where bias current must stay below 10 pA across operating conditions.

Can the TSU101RICT be used in transimpedance amplifier (TIA) configurations for photodiode sensing?

Yes-its 2 pA max input bias current, rail-to-rail input, and phase-reversal immunity make it ideal for TIA front-ends with photodiodes having leakage currents <10 pA. Stability is ensured with feedback resistors ≤10 MΩ and compensation capacitance ≥0.3 pF. The 8 kHz GBP limits usable bandwidth to ~16 Hz for 10 MΩ feedback, matching requirements of UV and pyroelectric sensors.

TSU101RICT 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:: 0.003V/µs

Gain Bandwidth Product:: 9 kHz

-3db Bandwidth:: -

Current - Input Bias:: 5 pA

Voltage - Input Offset:: 3 mV

Current - Supply:: 650nA

Current - Output / Channel:: 11 mA

Voltage - Supply Span (Min):: 1.5 V

Voltage - Supply Span (Max):: 5.5 V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

TSU101RICT FAQ

1.How can I place an order for TSU101RICT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSU101RICT 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 TSU101RICT reliable?

The price and inventory of TSU101RICT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSU101RICT is usually 5 days.

3.What payment methods are accepted for TSU101RICT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSU101RICT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSU101RICT?

TSU101RICT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSU101RICT 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 TSU101RICT?

For technical support, including TSU101RICT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSU101RICT requirements.

6.How does Aetrix verify that TSU101RICT is sourced from the original manufacturer or authorized distributors?

All TSU101RICT 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 TSU101RICT meets industry standards.

7.What is the process for return or replacement of TSU101RICT?

All TSU101RICT units undergo pre-shipment inspection (PSI). If there is an issue with TSU101RICT, 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 TSU101RICT part is unused and in its original packaging.

Return procedure for TSU101RICT:

1.Submit a request within 90 days.

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

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