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Texas Instruments TS321IDBVT
- Part No.:
- TS321IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS321IDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,627
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Product details
Overview
TS321IDBVT 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 output swing (min) at 5 V supply, draws only 500 µA typical supply current, and features 20 nA typical input bias current - enabling use in portable media players and HVAC sensor signal conditioning.
For engineers reviewing the TS321IDBVT datasheet, TS321IDBVT pinout, TS321IDBVT application, or TS321IDBVT equivalent, key selection criteria include its SOT-23-5 package footprint, rail-to-rail output capability (VOL = 15 mV, VOH = 3.5 V @ 5 V), low-noise 50 nV/√Hz input voltage noise, and guaranteed operation across –40°C to +125°C industrial temperature range.
Technical Context
The TS321IDBVT implements a classic bipolar input stage with complementary NPN/PNP differential pair, supporting wide common-mode input range (0 V to VCC+ – 1.5 V) and stable unity-gain operation into ≥1 µF capacitive loads. Its 0.8 MHz gain-bandwidth product and 0.4 V/µs slew rate are optimized for DC-coupled signal conditioning rather than high-frequency AC amplification.
It features internal frequency compensation, no phase reversal under overdrive, and robust ESD protection (±2500 V HBM). The device lacks rail-to-rail input but tolerates inputs up to 32 V regardless of supply - critical for fault-tolerant sensor interfaces in washing machines and refrigerators.
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 - supports battery-powered and line-powered systems without level-shifting. |
| Input Bias Current | 20 nA typical - enables high-impedance sensor interfacing (e.g., thermistors, pH electrodes) with minimal offset drift. |
| Output Swing | 0 V to 3.5 V minimum at VCC+ = 5 V - delivers usable dynamic range near ground and supply rails for 3.3 V/5 V logic-compatible outputs. |
| Gain Bandwidth | 0.8 MHz - sufficient for anti-aliasing filters, transducer amplifiers, and closed-loop control loops below 100 kHz. |
| Supply Current | 500 µA typical at 5 V - allows integration into always-on subsystems with sub-mA power budgets. |
| Common-Mode Range | 0 V to VCC+ – 1.5 V - accommodates ground-referenced inputs while rejecting supply ripple via 65 dB CMRR. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin, industrial motor control, and appliance environments. |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm × 1.45 mm height), surface-mount, tape-and-reel (250 pcs/reel), RoHS-compliant with NiPdAu/Sn lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - must be left floating; not used for thermal pad or grounding. |
| 2 | VCC– | Negative supply terminal - connects to ground in single-supply mode or negative rail in dual-supply mode. |
| 3 | IN+ | Non-inverting input - high-impedance node (20 nA bias) for reference or sensor signal routing. |
| 4 | IN– | Inverting input - accepts feedback network or signal source; common-mode range extends to VCC– – 0.3 V. |
| 5 | VCC+ | Positive supply terminal - accepts 3–30 V; input pins tolerate up to 32 V independent of supply. |
| 6–8 | N/A | Not applicable - SOT-23-5 has only five terminals; pins 6–8 do not exist on TS321IDBVT. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with ≥1 µF capacitive load | Eliminates need for external isolation resistors in driving LCD bias networks or long cables. |
| Wide supply range (3–30 V) | Reduces BOM count by supporting both 3.3 V microcontroller I/O and 24 V industrial sensors in same design. |
| Low 500 µA supply current | Enables continuous operation in battery-backed smoke detectors or smart thermostat sleep modes. |
| Input overvoltage tolerance (32 V) | Protects against transient coupling in HVAC control boards where 24 VAC rectified lines may spike. |
| –40°C to +125°C operation | Validated for placement near power stages in washing machine motor drivers without derating. |
Applications
| Desktop PC Power Monitoring | HVAC Temperature Sensing |
|---|---|
Use Scenario: Amplifying low-level voltage from thermistor-based ambient temperature sensor in motherboard VRM thermal management circuit. IC Role / Device Role / Timing Role: Single-supply op-amp configured as non-inverting amplifier with gain = 2.5, referenced to 0 V ground. Use Value: Delivers 3.5 V output swing at 5 V supply to match ADC input range, minimizing quantization error while consuming only 500 µA. |
Use Scenario: Conditioning output of NTC thermistor in air-handling unit duct sensor, operating from 24 VDC supply. IC Role / Device Role / Timing Role: Inverting amplifier with 10 kΩ feedback resistor, biased at mid-supply using resistor divider. Use Value: Tolerates 24 V supply transients up to 32 V without damage and maintains 20 nA input bias for <0.1°C measurement drift. |
| Portable Media Player Audio Line-Out | Refrigerator Compressor Control |
Use Scenario: Buffering DAC output to headphone jack in battery-powered MP3 player with 3.7 V Li-ion supply. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating DAC from variable headphone impedance load. Use Value: Stable into 100 pF–10 nF capacitive loads (cable + jack), delivering full 3.5 Vpp swing with <0.015% THD. |
Use Scenario: Comparing compressor discharge temperature signal against fixed threshold in frost-control logic. IC Role / Device Role / Timing Role: Open-loop comparator with hysteresis, powered from 12 V system rail. Use Value: Operates reliably at –40°C freezer compartment temperatures and withstands 12 V supply ripple without false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single 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 supply current and narrower –40°C to +85°C temp range. | Better for higher-speed filtering but less suitable for ultra-low-power or extended-temperature designs. | Choose LM321DR only if bandwidth > 0.8 MHz is required and temperature range ≤ +85°C. |
| MCP6001T-E/OT | Rail-to-rail input/output, 1 µA supply current, but only 1 MHz GBW and limited 2.7–6 V supply range. | Ideal for 3.3 V battery systems needing full rail utilization, but incompatible with 12–24 V industrial supplies. | Select MCP6001T-E/OT when rail-to-rail I/O is mandatory and supply is strictly ≤ 6 V. |
Compared with LM321DR and MCP6001T-E/OT, TS321IDBVT uniquely balances wide supply range (3–30 V), industrial temperature support (–40°C to +125°C), and sub-1 mA quiescent current - making it optimal for cost-sensitive, multi-voltage embedded systems where reliability across harsh environments is non-negotiable.
Availability
TS321IDBVT is available at Aetrix Electronics and suitable for desktop PCs, HVAC control units, portable media players, refrigerators, and washing machines requiring stable component supply across extended temperature ranges and diverse power architectures.
Supply support for TS321IDBVT 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision amplifiers and industrial-grade ICs.
The TS321 series was designed specifically for cost-sensitive, space-constrained industrial and consumer applications - emphasizing wide supply flexibility, robust ESD tolerance, and guaranteed performance across –40°C to +125°C without derating.
FAQ
What is the maximum capacitive load the TS321IDBVT can drive without oscillation?
The TS321IDBVT is stable with capacitive loads up to and exceeding 1 µF in unity-gain configuration, as confirmed in TI's SLVA381 stability analysis. This eliminates the need for isolation resistors when driving LCD bias networks, long PCB traces, or cable-connected sensors - a key advantage over many general-purpose op-amps that require external compensation above 100 pF.
Does the TS321IDBVT support rail-to-rail input operation?
No, the TS321IDBVT does not support rail-to-rail input. Its common-mode input voltage range is specified from 0 V to VCC+ – 1.5 V at 25°C (0 V to VCC+ – 2 V over full temperature range). However, inputs may safely exceed VCC+ up to 32 V without damage - a feature useful for overvoltage-tolerant sensor front-ends in TS321IDBVT-based designs.
What is the typical input offset voltage of the TS321IDBVT at room temperature?
The typical input offset voltage of the TS321IDBVT is 4 mV at 25°C, with a maximum of 5 mV across the full –40°C to +125°C operating range. This specification enables accurate DC-coupled amplification in temperature-sensing circuits where offset-induced errors must remain below 0.5°C in a 10 kΩ NTC interface - a requirement met by TS321IDBVT without external trimming.
Can the TS321IDBVT operate from a single 3.3 V supply?
Yes, the TS321IDBVT is fully specified down to 3 V single supply, making it compatible with 3.3 V systems. At VCC+ = 3.3 V, it delivers a minimum output swing of approximately 0 V to 2.8 V (extrapolated from 3.5 V swing at 5 V), with 500 µA typical supply current - ideal for low-voltage portable devices where TS321IDBVT replaces higher-quiescent-current alternatives.
Is the TS321IDBVT pin-compatible with other SOT-23-5 op-amps like the LM321 or MCP6001?
No, TS321IDBVT is not pin-compatible with LM321 or MCP6001 in SOT-23-5. While all three use 5-pin SOT-23, TS321IDBVT assigns Pin 1 as NC, Pin 2 as VCC–, Pin 3 as IN+, Pin 4 as IN–, and Pin 5 as VCC+. LM321 uses Pin 2 as IN–, Pin 3 as IN+, Pin 4 as VCC–, Pin 5 as VCC+, with no NC pin. MCP6001 uses Pin 2 as IN–, Pin 3 as IN+, Pin 4 as VCC–, Pin 5 as VCC+, also with no NC. PCB layout must be redesigned for TS321IDBVT.
TS321IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS321IDBVT FAQ
1.How can I place an order for TS321IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS321IDBVT 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 TS321IDBVT reliable?
The price and inventory of TS321IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS321IDBVT is usually 5 days.
3.What payment methods are accepted for TS321IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS321IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS321IDBVT?
TS321IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS321IDBVT 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 TS321IDBVT?
For technical support, including TS321IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS321IDBVT requirements.
6.How does Aetrix verify that TS321IDBVT is sourced from the original manufacturer or authorized distributors?
All TS321IDBVT 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 TS321IDBVT meets industry standards.
7.What is the process for return or replacement of TS321IDBVT?
All TS321IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TS321IDBVT, 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 TS321IDBVT part is unused and in its original packaging.
Return procedure for TS321IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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