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Texas Instruments TLV2781IDBVT
- Part No.:
- TLV2781IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV2781IDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:886
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Product details
Overview
TLV2781IDBVT from Texas Instruments is a single-channel rail-to-rail input/output operational amplifier optimized for ultra-low-voltage, low-power applications. It operates from 1.8 V to 3.6 V, delivers 8 MHz gain-bandwidth, 4.8 V/µs slew rate at 2.7 V, and draws only 650 µA per channel - enabling high-speed signal conditioning in battery-powered sensor interfaces and portable data converters.
For engineers reviewing the TLV2781IDBVT datasheet, TLV2781IDBVT pinout, TLV2781IDBVT application, or TLV2781IDBVT equivalent, this page provides verified electrical specifications, industrial-grade temperature support (−40°C to 125°C), SOT-23-5 package details, shutdown functionality, and real-world design context for precision analog front-ends in space-constrained systems.
Technical Context
The TLV2781IDBVT implements a CMOS input stage with rail-to-rail input common-mode range extending −0.2 V below ground and +0.2 V above VDD, supporting true single-supply operation. Its unity-gain-stable architecture achieves 8 MHz bandwidth while maintaining 58° phase margin into 2 kΩ//25 pF loads.
It integrates an active shutdown control (SHDN pin) that reduces supply current to ≤1.7 µA per channel and places the output in high-impedance state - critical for power-gated stages in multi-channel sensor arrays and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct operation from two rechargeable cells (±0.9 V to ±1.8 V) without voltage boosting. |
| Gain-Bandwidth Product | 8 MHz - supports stable closed-loop gain ≥10 up to ~800 kHz, suitable for anti-aliasing filters and ADC driver stages. |
| Slew Rate | 4.8 V/µs at VDD = 2.7 V - ensures <2.4 µs settling to 0.01% for 1 VPP steps, meeting timing requirements of 12-bit SAR ADCs. |
| Input Offset Voltage | Max 3000 µV over −40°C to 125°C - enables DC-coupled amplification of mV-level sensor outputs with <0.3% initial error. |
| Supply Current per Channel | 650 µA typical - allows 10+ channels to operate within 10 mA total budget in always-on monitoring nodes. |
| Input Noise Voltage | 9 nV/√Hz at 10 kHz - preserves SNR in audio preamps and high-resolution transducer signal chains. |
| Common-Mode Input Range | −0.2 V to VDD + 0.2 V - permits direct interfacing to grounded sensors and DAC outputs without level-shifting. |
Pinout & Package
SOT-23-5 (DBV) package: 5-pin, ultrasmall surface-mount plastic package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and exposed pad not present - compatible with standard reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Delivers rail-to-rail swing; high-impedance during shutdown; requires series resistor for >10 pF capacitive loads to ensure stability. |
| 2 (IN−) | Inverting Input | High-impedance CMOS node; sensitive to stray capacitance - must be routed short and away from noisy traces. |
| 3 (IN+) | Non-Inverting Input | Accepts signals from −0.2 V to VDD + 0.2 V; used for reference biasing or sensor excitation feedback paths. |
| 4 (GND) | Analog Ground | Primary return path for input bias currents and output load; must connect directly to low-inductance ground plane. |
| 5 (SHDN) | Shutdown Control | Active-low logic input; pulls to GND to disable amplifier (≤1.7 µA IDD); floats or ties to VDD to enable. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full dynamic range utilization in 1.8 V systems - e.g., digitizing 0–1.8 V thermistor or photodiode outputs without clipping. |
| Industrial Temperature Range | Specified from −40°C to 125°C - qualified for under-hood automotive sensors, industrial PLC analog inputs, and outdoor IoT edge nodes. |
| Low 650 µA Supply Current | Reduces thermal load in sealed enclosures and extends battery life in wireless sensor transmitters beyond 5 years (at 10 µA avg). |
| Integrated Shutdown | Reduces quiescent current by >99.8% to ≤1.7 µA - essential for duty-cycled measurement systems like smart meter current sensing. |
| 8 MHz Bandwidth at Low Power | Outperforms competing 1 µA op-amps by 3× bandwidth - supports higher sampling rates in delta-sigma modulator front-ends. |
Applications
| Portable Medical Sensors | Industrial Current Monitoring |
|---|---|
Use Scenario: Amplifying microvolt-level ECG electrode signals in wearable heart-rate monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier front-end with rail-to-rail input to capture baseline shifts and rail-to-rail output to maximize ADC input range. Use Value: 650 µA supply current enables >3-year battery life; 9 nV/√Hz noise preserves diagnostic SNR; shutdown mode cuts idle current to sub-µA between measurements. | Use Scenario: Isolated shunt-based current sensing in motor drives, where output must interface directly with 3.3 V ADCs across −40°C to 125°C ambient. IC Role / Device Role / Timing Role: Precision gain stage converting mV shunt voltage to 0–3.3 V full-scale, operating from 3.3 V supply with no external level shifters. Use Value: VICR extends to −0.2 V allows accurate zero-current detection; 3000 µV max VIO limits gain error to <0.1% at 10× gain; 8 MHz GBW supports fast transient response during fault events. |
| Smart Energy Meters | Low-Power Data Acquisition |
Use Scenario: Multiplexed voltage and current channel conditioning in Class 0.5 electricity meters requiring long-term calibration stability. IC Role / Device Role / Timing Role: Programmable-gain amplifier (PGA) core with shutdown control synchronized to ADC conversion cycles to minimize system power. Use Value: Shutdown turnoff time of 200 ns enables precise power gating between samples; 125°C rating ensures reliability inside sealed meter enclosures; 58° phase margin prevents oscillation with PCB trace capacitance. | Use Scenario: Signal conditioning for MEMS accelerometers and pressure sensors in battery-operated predictive maintenance nodes. IC Role / Device Role / Timing Role: Low-noise, low-drift buffer and filter driver preceding sigma-delta ADCs, operating continuously from 2.0 V Li-ion supply. Use Value: 18 nV/√Hz input noise at 1 kHz preserves resolution of 16-bit sensors; rail-to-rail output drives ADC reference without headroom loss; SOT-23-5 footprint saves board area in dense sensor modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA316IDBVR | Higher 10 MHz GBW, lower 5.5 nV/√Hz noise at 1 kHz, but 1000 µA supply current and no shutdown pin. | Better for high-SNR audio or precision metrology where power is secondary; unsuitable for duty-cycled systems needing shutdown. | Select OPA316IDBVR when bandwidth/noise priority outweighs power budget and shutdown requirement. |
| TLV9001IDBVR | Lower 650 µA supply current, rail-to-rail I/O, but 1 MHz GBW and no shutdown function; specified for −40°C to 125°C. | Ideal for cost-sensitive, low-bandwidth sensor buffers where shutdown is managed externally or omitted. | Choose TLV9001IDBVR for simpler, lower-cost designs where 8 MHz bandwidth is unnecessary and shutdown is not required. |
Compared with OPA316IDBVR and TLV9001IDBVR, the TLV2781IDBVT uniquely balances 8 MHz bandwidth, 650 µA quiescent current, integrated shutdown, and industrial temperature rating - making it the only option among the three for battery-powered, high-speed, thermally rugged sensor front-ends requiring active power gating.
Availability
TLV2781IDBVT is available at Aetrix Electronics and suitable for portable medical devices, industrial current monitoring systems, smart energy meters, and low-power data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLV2781IDBVT 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 delivering analog and embedded processing solutions, with deep expertise in precision analog ICs, power management, and signal chain technologies.
The TLV278x family was designed specifically for ultra-low-voltage, rail-to-rail operational amplifier applications in portable and industrial systems - emphasizing single-cell compatibility, low quiescent current, and robust performance across −40°C to 125°C.
FAQ
What is the maximum recommended supply voltage for TLV2781IDBVT?
The absolute maximum supply voltage for TLV2781IDBVT is 4 V, but the recommended operating range is strictly 1.8 V to 3.6 V per the datasheet. Exceeding 3.6 V risks parametric degradation and reduced reliability, especially at high temperatures. Operation at 3.6 V enables optimal slew rate (≥4 V/µs) and output drive capability while staying within safe SOA limits for the SOT-23-5 package.
Does TLV2781IDBVT support true rail-to-rail input at 1.8 V supply?
Yes, TLV2781IDBVT supports rail-to-rail input with common-mode range from −0.2 V to VDD + 0.2 V across its full operating range, including at 1.8 V supply. This is confirmed in the "Recommended Operating Conditions" table and validated by Figure 1–2 showing input offset voltage stability across the extended VICR. At 1.8 V, this means inputs can swing from −0.2 V to +2.0 V without phase reversal or increased distortion.
How does the shutdown function behave on TLV2781IDBVT?
TLV2781IDBVT's SHDN pin is active-low: pulling it to GND disables the amplifier, reducing supply current to ≤1.7 µA per channel and placing the output in high-impedance state. Leaving SHDN floating or tying it to VDD enables normal operation. Turnoff time is 200 ns and turnon time is 800 ns (measured to 50% IDD transition), enabling microsecond-level power cycling in time-triggered sensor systems using the TLV2781IDBVT.
What is the typical input bias current of TLV2781IDBVT?
The typical input bias current of TLV2781IDBVT is 2.5 pA at 25°C, with a maximum of 300 pA over the full −40°C to 125°C industrial temperature range. This ultra-low bias current minimizes voltage errors in high-impedance sensor interfaces (e.g., pH electrodes or piezoelectric transducers) and ensures stable operation with MΩ-range feedback networks without significant drift.
Can TLV2781IDBVT drive a 1000 pF capacitive load stably?
No - TLV2781IDBVT is not unity-gain stable into 1000 pF loads. The datasheet specifies stability for ≤25 pF capacitive loads (Figure 18 shows phase margin dropping below 45° at >100 pF). To drive larger capacitive loads, a series isolation resistor (RNULL) must be added between the output and the load, as shown in Figure 30. For 1000 pF, RNULL ≈ 20 Ω–50 Ω restores phase margin above 60° while preserving bandwidth for most sensor buffering applications.
TLV2781IDBVT 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:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2.5 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 650µA
- Current - Output / Channel:
- 23 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV2781IDBVT FAQ
1.How can I place an order for TLV2781IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2781IDBVT 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 TLV2781IDBVT reliable?
The price and inventory of TLV2781IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2781IDBVT is usually 5 days.
3.What payment methods are accepted for TLV2781IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2781IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2781IDBVT?
TLV2781IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2781IDBVT 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 TLV2781IDBVT?
For technical support, including TLV2781IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2781IDBVT requirements.
6.How does Aetrix verify that TLV2781IDBVT is sourced from the original manufacturer or authorized distributors?
All TLV2781IDBVT 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 TLV2781IDBVT meets industry standards.
7.What is the process for return or replacement of TLV2781IDBVT?
All TLV2781IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TLV2781IDBVT, 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 TLV2781IDBVT part is unused and in its original packaging.
Return procedure for TLV2781IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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