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Texas Instruments TS321IDBVTG4
- Part No.:
- TS321IDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS321IDBVTG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,784
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Product details
Overview
TS321IDBVTG4 from Texas Instruments is a bipolar single operational amplifier optimized for cost-sensitive, space-constrained applications. It operates from 3 V to 30 V single supply or ±1.5 V to ±15 V dual supply, delivers 3.5 V minimum output swing at 5 V supply, draws only 500 µA typical supply current, and features 20 nA typical input bias current - enabling use in battery-powered sensor signal conditioning and low-power industrial monitoring circuits.
For engineers reviewing the TS321IDBVTG4 datasheet, TS321IDBVTG4 pinout, TS321IDBVTG4 application, or TS321IDBVTG4 equivalent, key selection considerations include its SOT-23-5 package footprint, rail-to-rail input common-mode range (0 V to VCC–1.5 V), 0.8 MHz gain-bandwidth product, 0.4 V/µs slew rate, and compatibility with capacitive loads up to 1 µF without instability.
Technical Context
The TS321IDBVTG4 implements a classic bipolar input stage with complementary NPN/PNP differential pair, delivering stable unity-gain operation and robust performance with high capacitive loads. Its input common-mode voltage extends from ground to VCC–1.5 V (VCC–2 V over full temperature), and inputs tolerate voltages up to 32 V without damage - supporting flexible biasing in multi-rail systems.
It features internal frequency compensation for unconditional stability, 60° phase margin at unity gain, and low THD (0.015% at 1 kHz). The device supports both single-supply (e.g., 5 V sensor front-end) and dual-supply (e.g., ±12 V analog processing) configurations without external modifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V single supply or ±1.5 V to ±15 V dual supply - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V industrial and consumer systems |
| Gain-Bandwidth Product | 0.8 MHz - supports stable closed-loop operation up to ~100 kHz at gain = 8, suitable for anti-aliasing filters and medium-speed signal conditioning |
| Slew Rate | 0.4 V/µs - limits large-signal response time to ≥2.5 µs for 1 V step, appropriate for DC-coupled sensors and slow control loops |
| Input Bias Current | 20 nA typical - minimizes voltage error across high-impedance source networks (e.g., thermistor dividers, photodiode transimpedance feedback) |
| Output Voltage Swing | 0 V to 3.5 V min at VCC = 5 V - provides >70% rail-to-rail swing, easing interface with 3.3 V ADCs and logic |
| Common-Mode Input Range | 0 V to VCC–1.5 V - allows direct sensing of signals referenced to ground in single-supply configurations |
| Supply Current | 500 µA typical at 5 V - enables continuous operation in sub-mA power budgets, e.g., always-on environmental monitors |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm body, 1.45 mm max height), surface-mount, tape-and-reel compatible (250 pcs/reel), moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Must be left unconnected; no routing or grounding required |
| 2 (VCC–) | Negative supply terminal | Ground reference for single-supply operation; negative rail for dual-supply use |
| 3 (IN+) | Non-inverting input | High-impedance node accepting signal sources up to VCC–1.5 V; tolerant of overvoltage to 32 V |
| 4 (IN–) | Inverting input | High-impedance node used for feedback or signal injection; same voltage tolerance as IN+ |
| 5 (VCC+) | Positive supply terminal | Primary power input; accepts 3–30 V; bypass capacitor required per layout guidelines |
| 6–8 (NC) | No internal connection | Not present in SOT-23-5; only applicable to SOIC-8 variant |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range support | Operates from 3 V to 30 V single supply - eliminates need for LDO pre-regulation in 24 V industrial I/O modules |
| Stable with high capacitive loads | Remains stable driving ≥1 µF directly - simplifies output filtering without isolation resistors in motor driver feedback paths |
| Low input bias current | 20 nA typical - reduces offset drift in high-Z pH probe or strain gauge amplifiers |
| Rail-compatible input range | Inputs function down to ground - enables direct interfacing with 0–5 V sensor outputs without level-shifting circuitry |
| ESD robustness | ±2500 V HBM rating - improves handling reliability during manual PCB assembly and field service |
Applications
| Temperature Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Amplifying output of NTC thermistors in HVAC control boards where ambient temperature ranges from –40°C to 125°C. IC Role / Device Role / Timing Role: Precision DC-coupled non-inverting amplifier with gain = 10, rejecting common-mode noise on long sensor traces. Use Value: 20 nA input bias current prevents significant self-heating error in high-resistance thermistor networks; 500 µA supply current enables always-on thermal supervision. | Use Scenario: Conditioning back-EMF signals from brushed DC motors in washing machine drive modules. IC Role / Device Role / Timing Role: Inverting amplifier with 10 kΩ/100 kΩ feedback network, providing isolated voltage scaling before MCU ADC sampling. Use Value: Stable operation with 100 nF ceramic filter cap on output ensures clean signal acquisition; wide 3–30 V supply range matches main board rail. |
| Portable Media Player Audio | Refrigerator Defrost Sensor Interface |
Use Scenario: Buffering line-level audio signals between DAC and headphone amplifier in low-cost portable media players. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating DAC output impedance from variable headphone load. Use Value: 0.4 V/µs slew rate suffices for 20 kHz audio bandwidth; 0.8 MHz GBW ensures <0.1 dB gain flatness to 100 kHz. | Use Scenario: Amplifying resistance change from defrost heater thermistor during freezer cycle transitions. IC Role / Device Role / Timing Role: Differential amplifier measuring voltage drop across precision shunt in heater return path. Use Value: Input common-mode range extending to ground allows direct measurement of low-side current sense; 500 µA quiescent current minimizes battery drain in backup power mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM321DR | Higher 1.2 MHz GBW, 0.5 V/µs slew rate, but 700 µA typical supply current and narrower 3–26 V supply range | Better AC performance for higher-frequency filtering; less suitable for ultra-low-power battery operation | Select LM321DR when bandwidth >1 MHz is required and supply current budget allows +40% |
| TLV2461CDBVR | Rail-to-rail input/output, 6.4 MHz GBW, 1.6 V/µs slew rate, but 550 µA supply current and CMOS input (0.5 pA bias) | Superior dynamic range and precision for 3.3 V systems; incompatible with bipolar input stage requirements like ESD robustness or high-voltage tolerance | Select TLV2461CDBVR for 3.3 V rail-to-rail signal chains requiring <1 mV offset; avoid if input overvoltage >5 V is possible |
Compared with LM321DR and TLV2461CDBVR, TS321IDBVTG4 offers the lowest supply current (500 µA) and highest input overvoltage tolerance (32 V), making it optimal for cost-sensitive, wide-supply, low-power industrial sensor interfaces where precision beyond 10-bit ADC resolution is not required.
Availability
TS321IDBVTG4 is available at Aetrix Electronics and suitable for HVAC control systems, refrigerator electronics, portable media player audio stages, and washing machine motor feedback circuits requiring stable component supply across extended temperature ranges (–40°C to +125°C).
Supply support for TS321IDBVTG4 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in power management, signal chain, and microcontroller solutions.
The TS321 product line targets cost-optimized, space-constrained analog signal conditioning in industrial, appliance, and computing applications - emphasizing wide supply flexibility, low quiescent power, and robust manufacturability in small-outline packages.
FAQ
What is the maximum operating temperature range for the TS321IDBVTG4?
The TS321IDBVTG4 is rated for operation from –40°C to +125°C ambient temperature. This extended range is validated per TI's recommended operating conditions and thermal derating curves, ensuring reliable performance in demanding environments such as refrigerator compressor compartments and HVAC outdoor units. The TS321IDBVTG4 maintains specified electrical characteristics across this full range, including input offset voltage and supply current.
Does the TS321IDBVTG4 support rail-to-rail output swing?
The TS321IDBVTG4 does not provide rail-to-rail output swing. At VCC = 5 V, its guaranteed minimum output swing is 0 V to 3.5 V - meaning it can drive within 1.5 V of the positive rail and to ground. This limitation arises from its bipolar output stage architecture. For applications requiring true rail-to-rail output, alternatives like the TLV2461CDBVR should be considered, though they differ in input structure and supply range.
Can the TS321IDBVTG4 be used with a single 3.3 V supply?
Yes, the TS321IDBVTG4 supports single-supply operation down to 3 V, making it fully compatible with 3.3 V systems. At 3.3 V supply, it delivers usable output swing (typically 0 V to ~1.8 V), maintains 20 nA input bias current, and draws ~500 µA supply current. Its input common-mode range extends to ground, allowing direct interface with 0–3.3 V sensor outputs without level shifting - confirmed in TI's Electrical Characteristics table under VCC = 3 V test conditions.
Is the TS321IDBVTG4 pin-compatible with other SOT-23 op-amps like the LM321?
No, the TS321IDBVTG4 is not pin-compatible with the LM321 in SOT-23-5. While both use 5-pin SOT-23 packages, the TS321IDBVTG4 assigns Pin 1 as NC and Pin 2 as VCC–, whereas the LM321 uses Pin 1 for output and Pin 2 for inverting input. Swapping them would result in incorrect power connection and non-functional circuitry. Always verify pin functions using the official TI datasheet diagrams for each specific part number.
What is the purpose of the NC pins on the TS321IDBVTG4?
The TS321IDBVTG4 has one NC (no internal connection) pin - Pin 1 in the SOT-23-5 package. This pin is physically present but electrically unconnected to any internal circuitry. It must remain unconnected - neither grounded nor tied to supply rails. Its presence accommodates mechanical compatibility with larger-package variants (e.g., SOIC-8), but it serves no functional role in the SOT-23-5 device. TI explicitly states "Do not connect" in the Pin Functions table of the datasheet.
TS321IDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS321IDBVTG4 FAQ
1.How can I place an order for TS321IDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TS321IDBVTG4 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 TS321IDBVTG4 reliable?
The price and inventory of TS321IDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS321IDBVTG4 is usually 5 days.
3.What payment methods are accepted for TS321IDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS321IDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS321IDBVTG4?
TS321IDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS321IDBVTG4 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 TS321IDBVTG4?
For technical support, including TS321IDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS321IDBVTG4 requirements.
6.How does Aetrix verify that TS321IDBVTG4 is sourced from the original manufacturer or authorized distributors?
All TS321IDBVTG4 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 TS321IDBVTG4 meets industry standards.
7.What is the process for return or replacement of TS321IDBVTG4?
All TS321IDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TS321IDBVTG4, 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 TS321IDBVTG4 part is unused and in its original packaging.
Return procedure for TS321IDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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