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Texas Instruments TLV2781CDBVR
- Part No.:
- TLV2781CDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV2781CDBVR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,119
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Product details
Overview
TLV2781CDBVR from Texas Instruments is a single-channel rail-to-rail input/output operational amplifier optimized for 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 data converters and portable instrumentation.
For engineers reviewing the TLV2781CDBVR datasheet, TLV2781CDBVR pinout, TLV2781CDBVR application, or TLV2781CDBVR equivalent, key selection criteria include its 1.8 V minimum supply, −0.2 V to VDD+0.2 V common-mode input range, 9 nV/√Hz input noise at 10 kHz, shutdown capability (900 nA quiescent current), and SOT-23-5 packaging for space-constrained designs.
Technical Context
The TLV2781CDBVR employs a CMOS input stage with rail-to-rail input common-mode range extending 0.2 V beyond both supply rails and rail-to-rail output swing. Its unity-gain-stable architecture achieves 8 MHz bandwidth while maintaining 58° phase margin into 2 kΩ//25 pF loads, supporting precision buffer, active filter, and ADC driver roles without external compensation.
It integrates a dedicated shutdown pin (Pin 5) that reduces supply current to ≤1.4 µA per channel and places the output in high-impedance state. The device is specified across 0°C to 70°C (C-suffix), with input offset voltage ≤3 mV max and temperature coefficient of 8 µV/°C - ensuring stable DC performance in commercial-grade embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct operation from two alkaline or rechargeable cells; avoids need for LDO regulation in portable systems. |
| Gain-Bandwidth Product | 8 MHz - supports ≥1 MSPS sampling in 12-bit SAR ADC drivers with adequate phase margin. |
| Slew Rate | 4.8 V/µs at VDD = 2.7 V - ensures <2.4 µs settling to 0.01% for 1 V step, suitable for fast-settling analog front-ends. |
| Input Noise Voltage | 9 nV/√Hz at 10 kHz - preserves SNR in audio preamps and sensor signal chains where midband noise dominates. |
| Supply Current per Channel | 650 µA typical - allows integration of multiple amplifiers in ultra-low-power IoT nodes without exceeding µA-level budget. |
| Common-Mode Input Range | −0.2 V to VDD+0.2 V - accepts inputs below ground or above supply, simplifying level-shifting in single-supply mixed-signal circuits. |
| Shutdown Current | 900 nA typical - reduces system standby power by >99% when idle, critical for battery life in wearables and remote sensors. |
Pinout & Package
SOT-23-5 package: ultrasmall surface-mount outline (2.9 mm × 1.6 mm × 1.1 mm), thermally enhanced for low-power operation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Amplified signal source; rail-to-rail swing (1.46 V to 1.77 V at VDD = 1.8 V, IO = ±1 mA). |
| 2 (IN−) | Inverting Input | Differential input node; high impedance (>1 GΩ), low bias current (2.5 pA typ) minimizes error in high-Z sensor interfaces. |
| 3 (IN+) | Non-inverting Input | Differential input node; supports common-mode voltages down to −0.2 V, enabling ground-referenced signal acquisition. |
| 4 (GND) | Ground Reference | Return path for supply and signal currents; requires low-inductance connection to minimize noise coupling. |
| 5 (SHDN) | Shutdown Control | Active-low enable: <0.6 V disables amplifier (high-Z output, 900 nA IDD); >2 V or floating enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 1.8 V systems - output swings within 180 mV of rails at 1 mA load, preserving headroom for low-voltage ADCs. |
| Low 1.8 V operation | Guaranteed functionality at 1.8 V supply eliminates need for voltage boosters in coin-cell or Li-ion single-cell applications. |
| 8 MHz bandwidth @ 650 µA | Delivers 12-bit accuracy settling in <3 µs while consuming <1 mW - 3× higher speed-per-power than legacy micropower op amps. |
| Shutdown mode | Reduces total system quiescent current by orders of magnitude; output high-Z prevents loading of downstream circuitry during sleep. |
| Low input noise | 9 nV/√Hz at 10 kHz and 18 nV/√Hz at 1 kHz support high-fidelity amplification of weak signals from piezoelectric sensors or microphone capsules. |
Applications
| Portable Data Acquisition | Low-Voltage Sensor Interface |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring mV-level thermocouple or strain gauge signals. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier buffering sensor output before 12-bit SAR ADC sampling at 100 kSPS. Use Value: Rail-to-rail input accepts signals near ground; 650 µA supply current extends battery life to >1 year on two AA cells. | Use Scenario: Wearable ECG front-end amplifying microvolt-level cardiac signals in 1.8 V SoC subsystem. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with high CMRR and low 1/f noise for baseline stability. Use Value: −0.2 V to VDD+0.2 V input range captures full ECG waveform including negative deflections; 9 nV/√Hz noise preserves diagnostic fidelity. |
| ADC Driver for Low-Power MCUs | Shutdown-Controlled Signal Path |
Use Scenario: Driving internal ADC of MSP430 or nRF52 MCU from external analog sensor with minimal external components. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sensor impedance from ADC sample capacitor, ensuring monotonic settling. Use Value: 8 MHz GBW and 4.8 V/µs slew rate guarantee <2.8 µs 0.01% settling for 1 V step - faster than typical 12-bit ADC aperture time. | Use Scenario: Intermittent environmental monitoring node activating analog chain only during scheduled measurement bursts. IC Role / Device Role / Timing Role: Signal-path amplifier enabled synchronously with ADC clock via SHDN pin. Use Value: Shutdown current ≤1.4 µA eliminates leakage path during 99% duty-cycle sleep; 800 ns turn-on time enables sub-millisecond wake-up latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2781IDBVR | Same electrical specs but rated for −40°C to 125°C industrial temperature range; higher max input offset (4.5 mV vs 3 mV). | Required for automotive cabin modules or industrial PLC analog inputs exposed to wide ambient swings. | Select when extended temperature operation is mandatory; otherwise TLV2781CDBVR offers lower cost and tighter VIO for commercial use. |
| OPA316IDBVR | Higher GBW (10 MHz), lower noise (5.5 nV/√Hz), but higher supply current (400 µA vs 650 µA); no shutdown pin. | Preferred for high-SNR audio preamps or precision instrumentation where power is secondary to noise performance. | Choose OPA316IDBVR only if noise or bandwidth exceeds TLV2781CDBVR's 9 nV/√Hz and 8 MHz; TLV2781CDBVR remains optimal for shutdown-aware, ultra-low-power designs. |
Compared with TLV2781IDBVR, the TLV2781CDBVR trades industrial temperature range for tighter input offset and lower cost in commercial environments; versus OPA316IDBVR, it provides integrated shutdown and lower quiescent current at the expense of 2 MHz bandwidth and +3.5 nV/√Hz noise - making it superior for battery-constrained, intermittently active sensing nodes.
Availability
TLV2781CDBVR is available at Aetrix Electronics and suitable for portable medical devices, battery-powered test equipment, and low-voltage industrial sensor nodes requiring stable component supply across production lifecycles.
Supply support for TLV2781CDBVR 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 and embedded processing technologies, with decades of expertise in precision amplifiers and low-power design.
The TLV278x family was engineered for single-supply, rail-to-rail signal conditioning in energy-sensitive applications - targeting portable instrumentation, sensor signal chains, and battery-operated data acquisition where 1.8 V operation and shutdown control are essential.
FAQ
What is the maximum supply voltage for TLV2781CDBVR?
The absolute maximum supply voltage for TLV2781CDBVR is 4 V, but the recommended operating range is strictly 1.8 V to 3.6 V. Exceeding 3.6 V risks parametric shift or reliability degradation; operation at 3.6 V is validated for rail-to-rail output swing and 8 MHz bandwidth, while 1.8 V enables ultra-low-power modes in coin-cell applications.
Does TLV2781CDBVR support true rail-to-rail input at 1.8 V supply?
Yes, TLV2781CDBVR supports rail-to-rail input with common-mode range from −0.2 V to VDD+0.2 V across its full 1.8 V to 3.6 V supply range. At VDD = 1.8 V, this means inputs can be as low as −0.2 V and as high as 2.0 V - verified in datasheet Figure 1 and Table "Recommended Operating Conditions" - enabling direct interfacing with transducers that swing below ground.
How does the shutdown function behave on TLV2781CDBVR?
When Pin 5 (SHDN) is pulled ≤0.6 V, TLV2781CDBVR enters shutdown: supply current drops to ≤1.4 µA per channel and the output goes high-impedance. To enable, SHDN must be ≥2 V or left floating (with precautions against leakage-induced false shutdown). Turn-on time is 800 ns, turn-off time is 200 ns - confirmed in "Shutdown Characteristics" table on page 7 of SLOS245E.
What is the typical input offset voltage for TLV2781CDBVR at room temperature?
The typical input offset voltage for TLV2781CDBVR at 25°C is 250 µV, with a maximum of 3000 µV over the 0°C to 70°C commercial temperature range. This value is specified in the "Electrical Characteristics" table (page 5) under "Input offset voltage" for TLV278xC grade, and is critical for DC-coupled precision applications like weigh scales or pH meters.
Can TLV2781CDBVR drive capacitive loads without oscillation?
TLV2781CDBVR is unity-gain stable but exhibits reduced phase margin with capacitive loads >10 pF. Datasheet Figure 18 shows phase margin dropping below 45° at CL = 50 pF. For reliable operation, TI recommends adding a series null resistor (RNULL) between amplifier output and load capacitance - values of 0–50 Ω depending on CL - as shown in Figure 30 of SLOS245E.
TLV2781CDBVR 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV2781CDBVR FAQ
1.How can I place an order for TLV2781CDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2781CDBVR 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 TLV2781CDBVR reliable?
The price and inventory of TLV2781CDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2781CDBVR is usually 5 days.
3.What payment methods are accepted for TLV2781CDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2781CDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2781CDBVR?
TLV2781CDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2781CDBVR 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 TLV2781CDBVR?
For technical support, including TLV2781CDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2781CDBVR requirements.
6.How does Aetrix verify that TLV2781CDBVR is sourced from the original manufacturer or authorized distributors?
All TLV2781CDBVR 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 TLV2781CDBVR meets industry standards.
7.What is the process for return or replacement of TLV2781CDBVR?
All TLV2781CDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2781CDBVR, 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 TLV2781CDBVR part is unused and in its original packaging.
Return procedure for TLV2781CDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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