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Texas Instruments TS321QDBVRQ1
- Part No.:
- TS321QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS321QDBVRQ1.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,031
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Product details
Overview
TS321QDBVRQ1 from Texas Instruments is an AEC-Q100 qualified automotive-grade single bipolar operational amplifier in SOT-23-5 (DBV) package, featuring 500 µA typical supply current, ±1.5 V to ±15 V dual-supply operation, and rail-to-rail output swing of 0 V to 3.5 V (min) at 5 V supply - deployed in engine control sensor signal conditioning.
For engineers reviewing the TS321QDBVRQ1 datasheet, TS321QDBVRQ1 pinout, TS321QDBVRQ1 application, or TS321QDBVRQ1 equivalent, key selection criteria include automotive temperature range (–40°C to 125°C), low input bias current (20 nA typ), stable operation with capacitive loads, and SOT-23-5 footprint compatibility for space-constrained PCB layouts.
Technical Context
The TS321QDBVRQ1 implements a bipolar input stage with Class AB output stage, enabling stable unity-gain operation and robust performance under high capacitive load conditions up to 100 pF without external compensation. Its input common-mode range extends to VCC+ – 1.5 V and supports rail-to-rail output swing near ground and supply rails.
Designed for cost-sensitive automotive subsystems, it operates across 3 V to 30 V single supply or ±1.5 V to ±15 V dual supply, with 0.8 MHz gain-bandwidth product and 0.4 V/µs slew rate - balancing speed, power, and precision for analog front-end signal amplification.
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 wide battery voltage variation in automotive environments |
| Quiescent Current | 500 µA typical - enables low-power operation in always-on vehicle modules |
| Input Bias Current | 20 nA typical - minimizes error in high-impedance sensor interfaces like thermistors or piezoresistive elements |
| Output Voltage Swing | 0 V to 3.5 V (min) at VCC = 5 V - delivers usable dynamic range near supply rails for ADC interfacing |
| Gain-Bandwidth Product | 0.8 MHz - sufficient for DC-coupled sensor amplification and low-frequency filtering up to ~100 kHz |
| Common-Mode Input Range | 0 V to VCC+ – 1.5 V - accommodates signals referenced to ground or mid-supply in differential sensing |
| Phase Margin | 60° - ensures unconditional stability with 100 pF capacitive load without external compensation |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, surface-mount, lead-free (NiPdAu), moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting input | Differential input node accepting feedback or reference signal; biased internally to avoid latch-up |
| 2 (IN+) | Non-inverting input | High-impedance input for sensor signal or reference; common-mode range extends to VCC+ – 1.5 V |
| 3 (VCC–) | Negative supply rail | Ground reference for single-supply operation or negative rail for dual-supply configuration |
| 4 (OUT) | Amplifier output | Class AB push-pull output capable of sourcing 20 mA and sinking 12 mA into 2 kΩ load |
| 5 (VCC+) | Positive supply rail | Primary power connection; supports up to 30 V with internal overvoltage protection on inputs |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications with operating temperature range –40°C to 125°C and stress-tested per qualification standard |
| Stable with capacitive loads | Guaranteed phase margin ≥60° with 100 pF load - eliminates need for isolation resistor in sensor buffer designs |
| Wide supply range | Operates from 3 V to 30 V single supply - compatible with 12 V and 24 V vehicle electrical systems |
| Rail-to-rail output | Delivers 0 V to 3.5 V min swing at 5 V supply - maximizes ADC utilization without level-shifting circuitry |
| Low input bias current | 20 nA typical - reduces voltage error in high-Z sensor circuits such as NTC thermistors or strain gauges |
Applications
| Engine Coolant Temperature Sensing | Brake Fluid Level Monitoring |
|---|---|
Use Scenario: Amplifies low-level resistance-based signal from NTC thermistor embedded in coolant passage. IC Role / Device Role / Timing Role: Precision DC-coupled non-inverting amplifier with gain set by external resistors. Use Value: 20 nA input bias current prevents significant self-heating error in high-resistance thermistor networks. |
Use Scenario: Buffers analog voltage from capacitive fluid level sensor in brake master cylinder reservoir. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating sensor from downstream ADC input capacitance. Use Value: Stable operation with 100 pF load eliminates need for series resistor, preserving signal integrity and SNR. |
| Seat Belt Pretensioner Status Interface | 12 V Battery Voltage Monitor |
Use Scenario: Conditioned signal from microswitch indicating pretensioner deployment readiness status. IC Role / Device Role / Timing Role: Comparator input buffer with hysteresis network referenced to stable internal bandgap. Use Value: 500 µA quiescent current enables continuous monitoring without excessive parasitic drain on safety system battery. |
Use Scenario: Scales and conditions raw battery voltage for microcontroller ADC input in body control module. IC Role / Device Role / Timing Role: Fixed-gain inverting amplifier with precision resistor divider feedback. Use Value: 3 V to 30 V supply range allows direct connection to unregulated 12 V rail without LDO pre-regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM321QDRQ1 | CMOS input (0.25 pA IB), higher GBP (1 MHz), lower supply current (120 µA), but reduced output drive (10 mA sink/source) | Better for ultra-low-power, high-impedance sensor nodes; less suitable for driving 2 kΩ loads or capacitive cables | Select LM321QDRQ1 when input bias current <1 pA is critical and load is light; retain TS321QDBVRQ1 for robust output drive and proven capacitive-load stability |
| TLV2371QDBVRQ1 | Rail-to-rail input/output, lower noise (35 nV/√Hz), but higher quiescent current (650 µA) and narrower supply range (2.7 V to 16 V) | Preferred for precision signal chains requiring full rail-to-rail I/O; unsuitable for 24 V systems or extended temperature operation beyond 105°C | Choose TLV2371QDBVRQ1 only if RRO and sub-40 nV/√Hz noise are required and 24 V operation is not needed |
Compared with LM321QDRQ1 and TLV2371QDBVRQ1, the TS321QDBVRQ1 uniquely balances bipolar precision, capacitive-load stability, 24 V compatibility, and AEC-Q100 automotive qualification - making it optimal for legacy-compatible, cost-sensitive engine and chassis sensor interfaces where output drive and thermal robustness are prioritized.
Availability
TS321QDBVRQ1 is available at Aetrix Electronics and suitable for engine control units, battery management systems, and body electronics requiring stable component supply across automotive production lifecycles.
Supply support for TS321QDBVRQ1 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, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The TS321-Q1 belongs to TI's automotive-qualified op amp portfolio, designed specifically for reliable signal conditioning in harsh-temperature, high-reliability vehicle subsystems including powertrain, chassis, and safety modules.
FAQ
What is the operating temperature range of the TS321QDBVRQ1?
The TS321QDBVRQ1 is qualified for automotive applications with a guaranteed operating free-air temperature range of –40°C to +125°C, validated per AEC-Q100 Grade 1 requirements. This range covers under-hood and cabin-mounted electronic control units where ambient temperatures exceed consumer-grade limits. The TS321QDBVRQ1 maintains specified electrical performance across this full range without derating.
Does the TS321QDBVRQ1 support single-supply operation?
Yes, the TS321QDBVRQ1 supports true single-supply operation from 3 V to 30 V. Its input common-mode range extends down to ground (0 V) and up to VCC+ – 1.5 V, and its output swings from 0 V to at least 3.5 V (min) when powered from 5 V. This makes the TS321QDBVRQ1 suitable for direct interface with microcontrollers and ADCs in 5 V or 12 V automotive domains without level-shifting circuitry.
Is the TS321QDBVRQ1 pin-compatible with the commercial TS321?
Yes, the TS321QDBVRQ1 uses the identical SOT-23-5 (DBV) package and pinout as the commercial TS321, including IN– (Pin 1), IN+ (Pin 2), VCC– (Pin 3), OUT (Pin 4), and VCC+ (Pin 5). However, the TS321QDBVRQ1 undergoes additional automotive qualification testing, including extended temperature cycling and failure analysis, and carries different top-side marking (9CNS vs. standard TS321 markings).
What is the maximum capacitive load the TS321QDBVRQ1 can drive without oscillation?
The TS321QDBVRQ1 is characterized for stable operation with up to 100 pF capacitive load at unity gain, with a minimum phase margin of 60°. This capability is verified across temperature and supply voltage extremes and eliminates the need for external series isolation resistors in sensor buffer applications - a key advantage over many general-purpose op amps that require compensation for loads >20 pF.
How does the input bias current of the TS321QDBVRQ1 affect high-impedance sensor circuits?
The TS321QDBVRQ1 exhibits 20 nA typical input bias current, which introduces minimal offset error in high-impedance sensor interfaces such as NTC thermistors (e.g., 10 kΩ at 25°C) or piezoresistive pressure sensors. At 20 nA, the resulting voltage drop across a 100 kΩ source impedance is only 2 mV - well within typical system accuracy budgets. This enables direct connection without guard traces or active bias cancellation.
TS321QDBVRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS321QDBVRQ1 FAQ
1.How can I place an order for TS321QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TS321QDBVRQ1 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 TS321QDBVRQ1 reliable?
The price and inventory of TS321QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS321QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TS321QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS321QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS321QDBVRQ1?
TS321QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS321QDBVRQ1 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 TS321QDBVRQ1?
For technical support, including TS321QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS321QDBVRQ1 requirements.
6.How does Aetrix verify that TS321QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TS321QDBVRQ1 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 TS321QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TS321QDBVRQ1?
All TS321QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TS321QDBVRQ1, 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 TS321QDBVRQ1 part is unused and in its original packaging.
Return procedure for TS321QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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