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Texas Instruments TLV2781IDR
- Part No.:
- TLV2781IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2781IDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,267
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Product details
Overview
TLV2781IDR 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 bandwidth and 4.8 V/µs slew rate at just 650 µA supply current per channel, and supports industrial temperature range (−40°C to 125°C). It is used in high-resolution data converter front-ends and portable sensor signal conditioning.
For engineers reviewing the TLV2781IDR datasheet, TLV2781IDR pinout, TLV2781IDR application, or TLV2781IDR equivalent, key selection criteria include its rail-to-rail I/O capability at 1.8 V supply, shutdown functionality (I-suffix variant), ultralow quiescent current in active mode, and verified performance with capacitive loads up to 25 pF.
Technical Context
The TLV2781IDR employs a CMOS input stage enabling picoampere-level input bias current (2.5 pA typical) and rail-to-rail common-mode input range extending 0.2 V beyond both supply rails. Its internal architecture supports stable unity-gain operation with phase margin ≥58° into 2 kΩ//25 pF loads.
It integrates an active shutdown control pin (SHDN) that reduces supply current to ≤1.7 µA per channel while placing the output in high-impedance state - a feature confirmed only for TLV2781IDR's I-suffix industrial-grade variant per datasheet Table "TLV2780 and TLV2781 AVAILABLE OPTIONS" and Shutdown Characteristics section.
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 without regulation. |
| Bandwidth (GBW) | 8 MHz - supports accurate amplification of signals up to ~1 MHz in closed-loop gain ≥8 configurations. |
| Slew Rate | 4.8 V/µs at VDD = 2.7 V - ensures <2.4 µs settling to 0.01% for 1 V step with AV = −1, RL = 2 kΩ, CL = 10 pF. |
| Input Offset Voltage | 3000 µV max (I-suffix, full range) - sets DC accuracy limit in precision gain stages; trimmed version TLV2781AID offers 2000 µV max. |
| Supply Current/Ch | 650 µA typical - allows battery-powered systems to sustain >1-year operation on a 200 mAh coin cell when active 1% of time. |
| Input Noise Voltage | 9 nV/√Hz at 10 kHz - suitable for audio preamps and medium-bandwidth sensor interfaces where SNR >90 dB is required. |
| Shutdown Current | ≤1700 nA per channel - reduces system standby power by >380× versus active mode, critical for always-on IoT nodes. |
| Operating Temp | −40°C to 125°C - qualified for under-hood automotive, industrial motor control, and outdoor instrumentation. |
Pinout & Package
SOT-23-6 package (DBV) with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and thermal pad option not included - compatible with standard reflow profiles and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail swing (≥1.77 V at VDD = 1.8 V, IOH = −1 mA); high-impedance during shutdown. |
| 2 (GND) | Analog ground reference | Must be connected to low-impedance system ground plane; separate from digital ground if mixed-signal layout. |
| 3 (IN+) | Noninverting input | CMVR extends to −0.2 V and VDD + 0.2 V - enables sensing below ground or above supply in single-supply systems. |
| 4 (VDD) | Positive supply | Accepts 1.8–3.6 V; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling per layout guidelines. |
| 5 (IN−) | Inverting input | High-impedance node (1000 GΩ differential resistance); sensitive to stray capacitance - keep trace short. |
| 6 (SHDN) | Active-low shutdown control | Pull to GND to disable amplifier (IDD ≤ 1.7 µA); float or tie to VDD to enable - no external pullup required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 1.8 V systems - e.g., digitizing 0–1.8 V sensor outputs without level-shifting. |
| 8 MHz GBW @ 650 µA | Delivers 10× higher bandwidth per µA than legacy low-power op-amps (e.g., TLC27L2), improving transient response in feedback loops. |
| Shutdown mode (≤1.7 µA) | Reduces total system standby current in multi-amplifier designs - e.g., 4-channel sensor hub draws <7 µA in sleep. |
| −40°C to 125°C operation | Eliminates derating calculations for industrial PLC analog I/O modules operating in uncontrolled enclosures. |
| Low 9 nV/√Hz noise | Preserves ENOB in 16-bit SAR ADC front-ends - measured THD+N = 0.08% at AV = 10, f = 10 kHz, RL = 2 kΩ. |
| Stable with 25 pF load | Permits direct driving of ADC input capacitors or long traces without external isolation resistor (RNULL). |
Applications
| Portable Medical Sensors | Industrial Analog Input Modules |
|---|---|
Use Scenario: Amplifying low-level ECG electrode signals (0.5–5 mV) in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Single-supply transducer interface amplifier with rail-to-rail output driving 16-bit SAR ADC. Use Value: 650 µA supply current extends battery life; 9 nV/√Hz noise maintains diagnostic SNR; shutdown cuts idle power during motion artifact detection gaps. | Use Scenario: Conditioning 4–20 mA loop sensor outputs in DIN-rail mounted PLC I/O cards. IC Role / Device Role / Timing Role: Precision current-to-voltage converter and buffer for isolated analog inputs. Use Value: −40°C to 125°C rating ensures reliability in factory environments; 3000 µV max VIO meets 12-bit accuracy requirements; rail-to-rail output fully utilizes ADC reference. |
| Automotive Cabin Air Quality Sensors | Smart Energy Meter Signal Chains |
Use Scenario: Amplifying NDIR CO₂ sensor photodiode current in HVAC control units. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with shutdown during periodic measurement cycles. Use Value: 2.5 pA input bias minimizes offset drift from photodiode leakage; shutdown reduces average current to <1 µA between 1-second measurements. | Use Scenario: Buffering shunt-based current measurement signals before isolation and ADC sampling. IC Role / Device Role / Timing Role: High-precision, low-drift voltage follower isolating metering ASIC from noisy power rails. Use Value: 8 MHz bandwidth supports anti-aliasing filter design for 10 kHz sampling; CMRR ≥70 dB rejects common-mode noise from switching power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2781CDR | Same electrical specs but commercial temp range (0°C to 70°C); no shutdown current spec over full range. | Suitable for consumer electronics or lab equipment where ambient temperature stays within 0–70°C. | Select TLV2781CDR only if industrial temperature range is unnecessary and cost sensitivity outweighs environmental robustness. |
| OPA333AIDBVR | Zero-drift architecture; 2 µV max VIO vs 3000 µV; 17 µA supply current vs 650 µA; no shutdown pin. | Better DC accuracy for weigh scales or precision thermocouple amps; higher power disqualifies ultra-low-power use cases. | Choose OPA333AIDBVR when microvolt-level offset stability is mandatory and 26× higher supply current is acceptable. |
Compared with TLV2781CDR, TLV2781IDR provides guaranteed −40°C to 125°C operation and validated shutdown behavior across temperature, while OPA333AIDBVR trades 26× higher quiescent current for 1500× lower input offset voltage - making TLV2781IDR optimal for battery-powered industrial sensors requiring wide temperature coverage and ultra-low standby power.
Availability
TLV2781IDR is available at Aetrix Electronics and suitable for portable medical devices, industrial analog input modules, automotive cabin air quality sensors, and smart energy meter signal chains requiring stable component supply across extended temperature ranges.
Supply support for TLV2781IDR 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 specializing in analog and embedded processing solutions, with leadership in precision amplifiers, data converters, and power management ICs.
The TLV278x family was designed for ultra-low-voltage, low-power signal conditioning in battery-operated and energy-sensitive systems - emphasizing rail-to-rail operation down to 1.8 V, sub-milliwatt active power, and integrated shutdown control.
FAQ
What is the maximum supply voltage for TLV2781IDR?
The absolute maximum supply voltage for TLV2781IDR is 4 V, but the recommended operating range is strictly 1.8 V to 3.6 V per the datasheet's Recommended Operating Conditions table. Exceeding 3.6 V risks parametric degradation or permanent damage, especially at elevated temperatures.
Does TLV2781IDR support rail-to-rail input and output simultaneously?
Yes, TLV2781IDR supports true rail-to-rail input and output operation: the common-mode input voltage range extends from −0.2 V to VDD + 0.2 V, and the output swings within 180 mV of each rail (e.g., 1.77 V high-level output at VDD = 1.8 V, IOH = −1 mA), enabling full utilization of 1.8 V supply headroom.
How does the shutdown function work on TLV2781IDR?
The SHDN pin (Pin 6) is active-low: pulling it to GND disables the amplifier, reducing supply current to ≤1700 nA per channel and placing the output in high-impedance state. Leaving SHDN floating or tying it to VDD enables normal operation - no external pullup resistor is required due to internal logic design.
Can TLV2781IDR drive a 1000 pF capacitive load?
No - TLV2781IDR is characterized for stability with up to 25 pF capacitive load (CL = 25 pF, RL = 2 kΩ). Driving 1000 pF directly causes severe peaking or oscillation. For larger loads, TI recommends adding a series RNULL resistor (e.g., 20–100 Ω) between amplifier output and capacitor, as detailed in Figure 30 of the datasheet.
What is the input bias current specification for TLV2781IDR?
The input bias current for TLV2781IDR is 2.5 pA typical and ≤300 pA over the full −40°C to 125°C industrial temperature range. This ultra-low value minimizes voltage errors in high-impedance sensor interfaces, such as photodiode transimpedance amplifiers or pH electrode buffers.
TLV2781IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
TLV2781IDR FAQ
1.How can I place an order for TLV2781IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2781IDR 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 TLV2781IDR reliable?
The price and inventory of TLV2781IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2781IDR is usually 5 days.
3.What payment methods are accepted for TLV2781IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2781IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2781IDR?
TLV2781IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2781IDR 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 TLV2781IDR?
For technical support, including TLV2781IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2781IDR requirements.
6.How does Aetrix verify that TLV2781IDR is sourced from the original manufacturer or authorized distributors?
All TLV2781IDR 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 TLV2781IDR meets industry standards.
7.What is the process for return or replacement of TLV2781IDR?
All TLV2781IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV2781IDR, 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 TLV2781IDR part is unused and in its original packaging.
Return procedure for TLV2781IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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