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Texas Instruments TLV2781CDBVT
- Part No.:
- TLV2781CDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV2781CDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
TLV2781CDBVT 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 supply, delivers 8 MHz gain-bandwidth, 4.8 V/µs slew rate at 2.7 V, and consumes only 650 µA per channel - enabling high-speed signal conditioning in battery-powered sensor interfaces and portable data converters.
For engineers reviewing the TLV2781CDBVT datasheet, TLV2781CDBVT pinout, TLV2781CDBVT application, or TLV2781CDBVT equivalent, this device is selected for precision analog front-ends where supply headroom is constrained, output swing must reach both rails, and noise (9 nV/√Hz @ 10 kHz) and distortion (<0.08% THD+N) are critical in 12–16-bit ADC driver designs.
Technical Context
The TLV2781CDBVT employs a CMOS input stage with rail-to-rail common-mode input range (−0.2 V to VDD+0.2 V) and rail-to-rail output swing, supporting operation down to 1.8 V while maintaining 8 MHz bandwidth and 58° phase margin into 2 kΩ//25 pF loads. Its shutdown function (active-low SHDN pin) reduces supply current to ≤1.4 µA per channel, making it suitable for duty-cycled sensing nodes.
It features low input bias current (2.5 pA typ), low input offset voltage (3000 µV max over 0°C–70°C), and high PSRR (75 dB min at 1.8–3.6 V), enabling stable performance in noisy mixed-signal environments without external trimming. The device is specified for commercial temperature range (0°C to 70°C) and packaged in a 5-pin SOT-23 (DBV) with thermal resistance ΘJA = 324.1°C/W.
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 NiMH cells; supports ±0.9 V to ±1.8 V split supplies. |
| Gain-Bandwidth Product | 8 MHz - allows stable unity-gain buffer configurations up to ~1 MHz with 10 pF load; sufficient for driving 1 MSPS SAR ADCs. |
| Slew Rate | 4.8 V/µs at VDD = 2.7 V - supports full-scale 1 VPP output transitions in <210 ns, critical for fast-settling data acquisition paths. |
| Input Noise Voltage | 9 nV/√Hz at 10 kHz - ensures minimal added noise when amplifying low-level sensor signals before 16-bit ADCs. |
| Supply Current per Channel | 650 µA typ - enables continuous operation in ultra-low-power systems with <1 mW total quiescent power at 1.8 V. |
| Input Offset Voltage | 3000 µV max (0°C to 70°C) - defines worst-case DC error in precision gain stages; compensated by system calibration or external trimming. |
| Rail-to-Rail I/O | Yes - input common-mode extends 0.2 V beyond rails; output swings within 180 mV of rails at 1 mA load, maximizing dynamic range. |
Pinout & Package
TLV2781CDBVT is housed in a 5-pin SOT-23 (DBV) package - ultrasmall surface-mount footprint (2.9 mm × 1.6 mm × 1.1 mm), lead-free, RoHS-compliant, and optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail voltage swing; capable of sourcing/sinking ≥10 mA; requires series resistor for >10 pF capacitive loads. |
| 2 - GND | Analog ground reference | Primary return path for input bias currents and output load; must connect to low-impedance ground plane near device. |
| 3 - IN+ | Non-inverting input | High-impedance CMOS node (1000 GΩ); sensitive to layout-induced leakage; keep trace short and guard with ground. |
| 4 - VDD | Positive supply | Accepts 1.8–3.6 V; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling; avoid shared traces with digital supplies. |
| 5 - IN− | Inverting input | High-impedance CMOS node; matched to IN+ for low offset; routing must mirror IN+ to minimize thermocouple and parasitic effects. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply voltage range in single-supply systems - e.g., 0–1.8 V input → 0–1.8 V output with <180 mV headroom. |
| 8 MHz GBW at 650 µA | Delivers high-speed performance with ultra-low quiescent power - 12× higher bandwidth per µA than legacy low-power op amps. |
| Shutdown mode (SHDN) | Reduces supply current to ≤1.4 µA per channel; outputs enter high-impedance state - ideal for intermittent sensor readout cycles. |
| Low input noise (9 nV/√Hz) | Minimizes degradation of SNR in front-end amplification of thermocouples, strain gauges, or MEMS sensors feeding 16-bit ADCs. |
| Specified for 0°C to 70°C | Validated performance across commercial temperature range - simplifies qualification for consumer, industrial control, and medical peripherals. |
Applications
| Portable Data Acquisition | Low-Voltage Sensor Interface |
|---|---|
|
Use Scenario: Battery-powered handheld meter acquiring analog sensor outputs (e.g., pH probe, RTD) at 10 kSPS with 14-bit resolution. IC Role / Device Role / Timing Role: Precision non-inverting amplifier and ADC driver; provides rail-to-rail input range and 1 VPP drive into 10 kΩ//10 pF ADC input. Use Value: 650 µA supply current extends battery life; 8 MHz GBW ensures <1 µs settling to 0.01%; 9 nV/√Hz noise preserves effective resolution. |
Use Scenario: Wearable health monitor measuring ECG signal amplitude (0.5–5 mV) with motion artifact rejection. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block; configured as differential input with matched feedback network. Use Value: Rail-to-rail input accepts ±0.2 V common-mode shift from electrode offsets; low IB (2.5 pA) prevents DC drift in high-Z electrode paths. |
| Energy-Harvesting Signal Chain | Low-Power Industrial Transmitter |
|
Use Scenario: Solar- or thermal-harvested node powering analog front-end for temperature/humidity sensing with microcontroller wake-up on threshold. IC Role / Device Role / Timing Role: Active filter and level-shifter between sensor and ultra-low-power SAR ADC; enabled only during measurement burst. Use Value: Shutdown current ≤1.4 µA minimizes quiescent drain; 1.8 V minimum supply matches harvested voltage envelope; fast turn-on (800 ns) enables rapid sampling. |
Use Scenario: 4–20 mA loop-powered transmitter converting 0–5 V process voltage to current output using DAC and op-amp I/V stage. IC Role / Device Role / Timing Role: Output buffer and current-summing node amplifier; drives 250 Ω load referenced to loop supply. Use Value: Rail-to-rail output ensures full 0–5 V DAC range maps linearly to 4–20 mA; PSRR >75 dB rejects loop supply ripple from output accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2781IDBVT | Same electrical specs but rated for −40°C to 125°C industrial temperature range; higher max input offset (4500 µV). | Required for automotive under-hood or factory-floor ambient conditions exceeding 70°C. | Select TLV2781IDBVT when extended temperature operation is mandatory; otherwise TLV2781CDBVT offers lower cost and tighter VIO spec for commercial use. |
| OPA333AIDBVR | Zero-drift architecture; 10 µV max VIO, 0.1 µV/°C drift, 350 nA supply current, but only 350 kHz GBW and 160 µs settling time. | Better DC precision and drift stability, but insufficient speed for >10 kSPS data acquisition. | Choose OPA333AIDBVR for high-accuracy DC-coupled sensor conditioning; TLV2781CDBVT remains superior for AC-coupled or wideband applications requiring speed and low noise. |
Compared with TLV2781IDBVT, the TLV2781CDBVT trades extended temperature capability for tighter input offset and lower cost in commercial environments; versus OPA333AIDBVR, it delivers 23× higher bandwidth and 10× lower noise at the expense of DC precision - making it optimal for speed- and noise-sensitive, moderate-accuracy signal chains.
Availability
TLV2781CDBVT is available at Aetrix Electronics and suitable for portable data acquisition, low-voltage sensor interface, and energy-harvesting signal chain applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for TLV2781CDBVT 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 digital signal technologies - with decades of expertise in precision op amps and low-power signal conditioning.
The TLV278x family was designed specifically for single-supply, low-voltage, high-speed analog signal paths in portable and battery-constrained systems - emphasizing rail-to-rail operation, sub-mA quiescent current, and robust capacitive-load drive.
FAQ
What is the maximum supply voltage for TLV2781CDBVT?
The absolute maximum supply voltage for TLV2781CDBVT is 4 V, but the recommended operating range is strictly 1.8 V to 3.6 V. Exceeding 3.6 V risks parametric degradation and reduced reliability; operation at 3.6 V delivers optimal slew rate (≥4 V/µs) and output swing while staying within safe margins.
Does TLV2781CDBVT have a shutdown pin, and how does it behave?
Yes, TLV2781CDBVT includes an active-low shutdown pin (pin 5, labeled SHDN in functional diagrams). When pulled to GND, it disables the amplifier, reducing supply current to ≤1.4 µA per channel and placing the output in high-impedance state. Pulling SHDN to VDD or leaving it floating enables normal operation.
Can TLV2781CDBVT drive a 1000 pF capacitive load directly?
No - TLV2781CDBVT is not unity-gain stable into >10 pF capacitive loads without external compensation. Driving 1000 pF directly causes peaking, ringing, or oscillation due to phase margin collapse. A series resistor (RNULL, typically 20–100 Ω) must be placed between the output pin and the load to restore stability.
What is the input common-mode voltage range for TLV2781CDBVT?
The input common-mode voltage range for TLV2781CDBVT is −0.2 V to VDD+0.2 V, confirmed across 1.8 V to 3.6 V supply. This rail-to-rail input capability allows the device to accept signals below ground or above VDD - essential for interfacing with bipolar sensors or level-shifted inputs in single-supply systems.
Is TLV2781CDBVT pin-compatible with other SOT-23 op amps like TLV2371 or OPA344?
No - TLV2781CDBVT uses a non-standard SOT-23 pinout: pin 1 = OUT, pin 2 = GND, pin 3 = IN+, pin 4 = VDD, pin 5 = IN−. Most other SOT-23 op amps (e.g., TLV2371, OPA344) follow the industry-standard configuration (IN−, IN+, VDD, OUT, GND), making them incompatible without PCB redesign.
TLV2781CDBVT 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
TLV2781CDBVT FAQ
1.How can I place an order for TLV2781CDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2781CDBVT 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 TLV2781CDBVT reliable?
The price and inventory of TLV2781CDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2781CDBVT is usually 5 days.
3.What payment methods are accepted for TLV2781CDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2781CDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2781CDBVT?
TLV2781CDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2781CDBVT 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 TLV2781CDBVT?
For technical support, including TLV2781CDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2781CDBVT requirements.
6.How does Aetrix verify that TLV2781CDBVT is sourced from the original manufacturer or authorized distributors?
All TLV2781CDBVT 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 TLV2781CDBVT meets industry standards.
7.What is the process for return or replacement of TLV2781CDBVT?
All TLV2781CDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TLV2781CDBVT, 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 TLV2781CDBVT part is unused and in its original packaging.
Return procedure for TLV2781CDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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