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STMicroelectronics TSV321RAILT
- Part No.:
- TSV321RAILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSV321RAILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:20,587
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Product details
Overview
TSV321RAILT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier optimized for low-voltage portable applications. It operates from 2.5 V to 6 V, delivers 80 mA output current, achieves 1.3 MHz gain bandwidth at 3 V, and supports extended common-mode input range (VDD − 0.2 V to VCC + 0.2 V) - enabling direct sensor interfacing in battery-powered audio and signal conditioning circuits.
For engineers reviewing the TSV321RAILT datasheet, TSV321RAILT pinout, TSV321RAILT application, or TSV321RAILT equivalent, key selection criteria include its SOT23-5 package footprint, −40 °C to +125 °C operating temperature range, 0.1 mV typical input offset voltage (A-grade), rail-to-rail swing into 600 Ω, and 27 nV/√Hz input voltage noise - all critical for precision, low-power analog front-ends.
Technical Context
The TSV321RAILT implements a CMOS input stage with rail-to-rail input common-mode range extending 200 mV beyond supply rails and rail-to-rail output swing within 100 mV of each rail under 600 Ω load. Its internal compensation ensures stability with up to 500 pF capacitive load without external compensation.
It features low quiescent current (650 µA max per amplifier), high open-loop gain (≥74 dB into 600 Ω), and robust ESD protection (2 kV HBM). The device is specified across industrial and extended temperature ranges and supports single-supply operation down to 2.5 V - making it suitable for direct coupling in sensor buffers and headphone drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 6 V - enables direct use with Li-ion (3.0–4.2 V), 3.3 V, or dual-cell alkaline systems. |
| Gain Bandwidth Product | 1.3 MHz at VCC = 3 V - sufficient for anti-aliasing filters, active RC filters, and audio preamps up to ~100 kHz. |
| Output Current | ±80 mA - drives 32 Ω headphones directly or 600 Ω loads with <100 mV headroom to rails. |
| Input Offset Voltage | 0.1 mV typ. (TSV321A grade) - reduces DC error in precision sensor amplification and low-gain instrumentation stages. |
| Input Voltage Noise | 27 nV/√Hz - supports low-noise signal conditioning for microvolt-level sensor outputs (e.g., thermopiles, bridge sensors). |
| Common-Mode Range | VDD − 0.2 V to VCC + 0.2 V - allows input signals to exceed supply rails by 200 mV, simplifying level-shifting in mixed-supply systems. |
| Operating Temperature | −40 °C to +125 °C - qualified for automotive cabin modules, industrial controllers, and ruggedized portable equipment. |
Pinout & Package
SOT23-5 package: ultra-compact 5-pin surface-mount outline with exposed pad option (not applicable to this variant); thermal resistance RthJA = 250 °C/W; compatible with standard reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Amplified single-ended output node; rail-to-rail swing supports full dynamic range utilization in low-voltage systems. |
| 2 (−IN) | Inverting Input | Differential input terminal; CMOS input ensures <150 nA bias current, minimizing resistor-induced offset errors. |
| 3 (+IN) | Non-inverting Input | Differential input terminal; supports common-mode voltages beyond supply rails (±0.2 V margin). |
| 4 (V−) | Negative Supply / Ground | Reference return path; tied to system ground in single-supply configurations (VDD = 0 V). |
| 5 (V+) | Positive Supply | Primary power connection; accepts 2.5–6 V; decoupling capacitor required within 1 cm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale signal swing in 3.3 V or lower systems - eliminates need for level-shifting or dual supplies in portable designs. |
| Extended Vicm | Input range extends 200 mV beyond rails - permits direct interface with overvoltage-tolerant sensors or DACs without external clamping. |
| High Output Drive | ±80 mA sink/source capability - drives 32 Ω headphones or 600 Ω loads without external buffer stages. |
| Low Power Operation | 650 µA max supply current per amplifier - extends battery life in always-on sensor nodes and wearable devices. |
| Stable with Capacitive Load | Guaranteed stable with up to 500 pF load - eliminates need for isolation resistors when driving ADC inputs or long PCB traces. |
Applications
| Audio Headphone Driver | Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Driving stereo 32 Ω earbuds from a 3.3 V microcontroller DAC output in a portable medical monitor. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail output buffer amplifying and current-boosting DAC voltage to deliver clean audio with minimal THD (0.01 %). Use Value: Eliminates external output coupling capacitors and discrete transistor buffers - reducing BOM count and board area by >30 %. |
Use Scenario: Amplifying low-level thermistor or strain gauge signals in an industrial temperature controller operating from 3.6 V Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with 0.1 mV offset and 27 nV/√Hz noise, configured for G = 100. Use Value: Achieves ±0.5 °C measurement accuracy over −40 °C to +125 °C without calibration - enabled by A-grade offset and wide Vicm. |
| Laptop Battery Monitoring | Portable ECG Front-End |
|
Use Scenario: Measuring cell voltage and charge current in a multi-cell laptop battery pack using a 5 V system rail. IC Role / Device Role / Timing Role: High-side current-sense amplifier and rail-to-rail differential voltage monitor feeding into an ADC. Use Value: Extended Vicm (up to VCC + 0.2 V) allows direct sensing of voltages above supply - avoiding costly isolated amplifiers. |
Use Scenario: First-stage instrumentation amplifier in a handheld ECG device powered by two AA cells (3 V nominal). IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input buffer for biopotential signals; configured as unity-gain follower with guard drive. Use Value: 27 nV/√Hz noise and 1.3 MHz GBW preserve QRS complex fidelity while enabling compact 3 V operation - meeting IEC 60601-2-27 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Higher supply current (800 µA typ.), lower GBP (1 MHz), no extended Vicm (V− to V+ only) | Less suitable for over-rail sensor inputs or ultra-low-power designs requiring <650 µA | Prefer TSV321RAILT where extended common-mode range or lower quiescent current is required. |
| TSV851ICT | Higher precision (25 µV max Vio), higher GBP (1.8 MHz), but higher supply current (1.1 mA) and narrower Vicm (V− to V+) | Better for high-accuracy DC-coupled instrumentation; less optimal for battery life or over-rail signal handling | Choose TSV321RAILT when balancing precision, power, and input flexibility in portable systems. |
Compared with LMV321IDBVR and TSV851ICT, the TSV321RAILT uniquely combines extended Vicm, rail-to-rail output, 80 mA drive, and sub-650 µA quiescent current - making it the optimal choice for space-constrained, battery-powered analog signal chains requiring both precision and robustness.
Availability
TSV321RAILT is available at Aetrix Electronics and suitable for battery-powered audio systems, industrial sensor nodes, and portable medical devices requiring stable component supply across extended temperature and voltage ranges.
Supply support for TSV321RAILT 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TSV3xx family targets low-voltage, rail-to-rail general-purpose op-amp applications - emphasizing power efficiency, wide supply range, and ease of use in portable and space-constrained embedded systems.
FAQ
What is the maximum capacitive load the TSV321RAILT can drive without oscillation?
The TSV321RAILT is characterized for stability with up to 500 pF capacitive load at unity gain, per datasheet Figure 14 and Table 3. No external compensation is required for loads ≤500 pF. For larger loads, a series isolation resistor (e.g., 10–100 Ω) between output and capacitance is recommended to maintain phase margin ≥53°.
Does the TSV321RAILT support true single-supply operation with input signals near ground?
Yes. With VDD = 0 V and VCC = 2.5–6 V, the common-mode input range extends to VDD − 0.2 V = −0.2 V, allowing inputs 200 mV below ground. This enables accurate amplification of ground-referenced sensor signals without level-shifting circuitry.
How does the TSV321RAILT's output current capability compare to standard LM321-class op-amps?
The TSV321RAILT delivers ±80 mA output current - significantly higher than LM321 (±20 mA) or LMV321 (±40 mA). This enables direct drive of low-impedance loads like 32 Ω headphones or 600 Ω instrumentation inputs without external transistors or buffers.
Is the TSV321RAILT pin-compatible with other SOT23-5 op-amps such as the LMV321?
No. While both use SOT23-5 packages, pin assignments differ: TSV321RAILT uses OUT/−IN/+IN/V−/V+, whereas LMV321 uses V+/OUT/−IN/+IN/V−. Direct replacement requires PCB layout modification - verify pin mapping before substitution.
TSV321RAILT 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:
- Rail-to-Rail
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 500µA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSV321RAILT FAQ
1.How can I place an order for TSV321RAILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSV321RAILT 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 TSV321RAILT reliable?
The price and inventory of TSV321RAILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSV321RAILT is usually 5 days.
3.What payment methods are accepted for TSV321RAILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSV321RAILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSV321RAILT?
TSV321RAILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSV321RAILT 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 TSV321RAILT?
For technical support, including TSV321RAILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSV321RAILT requirements.
6.How does Aetrix verify that TSV321RAILT is sourced from the original manufacturer or authorized distributors?
All TSV321RAILT 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 TSV321RAILT meets industry standards.
7.What is the process for return or replacement of TSV321RAILT?
All TSV321RAILT units undergo pre-shipment inspection (PSI). If there is an issue with TSV321RAILT, 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 TSV321RAILT part is unused and in its original packaging.
Return procedure for TSV321RAILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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