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Texas Instruments TLV2451CD
- Part No.:
- TLV2451CD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV2451CD.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:600
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Product details
Overview
TLV2451CD from Texas Instruments is a single-channel rail-to-rail input/output operational amplifier optimized for ultralow-power, low-voltage portable applications. It delivers 220 kHz gain-bandwidth, 23 µA/channel supply current, ±10 mA output drive, 20 µV typical input offset voltage, and operates from 2.7 V to 6 V - enabling high-precision signal conditioning in battery-powered medical sensors and data acquisition front-ends.
For engineers reviewing the TLV2451CD datasheet, TLV2451CD pinout, TLV2451CD application, or TLV2451CD equivalent, this page provides verified package mapping (5-pin SOT-23), confirmed rail-to-rail I/O behavior, shutdown-inactive status, real-world output swing performance (within 250 mV of rails at 2.5 mA), and direct alternative part comparisons with design-level functional trade-offs.
Technical Context
The TLV2451CD uses a CMOS input stage enabling rail-to-rail common-mode input range and ultra-low input bias current (0.9 nA typ). Its internal compensation ensures stable unity-gain operation with 56° phase margin into 1000 pF loads, supporting robust sensor interface and filtering configurations without external compensation.
It features fully specified operation across 0°C to 70°C (C-suffix), supports single-supply operation down to 2.7 V, and achieves 106 dB PSRR and 80 dB CMRR at 25°C - critical for rejecting noise in mixed-signal embedded systems where supply and ground references are shared with digital circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - enables direct use with single Li-ion, two alkaline, or regulated 3.3 V/5 V rails without level-shifting. |
| Gain-Bandwidth Product | 220 kHz - supports DC-coupled amplification of low-frequency biosignals (ECG, EEG) and industrial sensor outputs up to ~100 kHz with <0.1% gain error. |
| Supply Current per Channel | 23 µA - allows continuous operation for >1 year on a 200 mAh coin cell in always-on patient monitoring nodes. |
| Rail-to-Rail I/O | Input common-mode range: 0 V to VDD; output swing: within 250 mV of each rail at 2.5 mA - maximizes dynamic range in 3 V systems. |
| Input Offset Voltage | 20 µV (typ) - reduces baseline drift in precision bridge amplifier stages, minimizing calibration frequency in strain-gauge or RTD interfaces. |
| Output Drive Capability | ±10 mA - drives 10 kΩ loads directly while maintaining rail-to-rail swing, eliminating need for output buffer stages in DAC output buffers. |
| Power Supply Rejection Ratio | 106 dB - suppresses ripple and noise from switching regulators feeding analog sections, improving SNR in mixed-supply designs. |
Pinout & Package
TLV2451CD is housed in a 5-pin SOT-23 package (DBV), with thermal pad omitted. Pin 1 is marked by a beveled edge or molded dot; orientation follows standard JEDEC SOT-23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage with ±10 mA sourcing/sinking capability; connects directly to ADC input or filter network. |
| 2 (GND) | Analog ground reference | Must be tied to clean system AGND plane; separates analog return path from digital ground to minimize noise coupling. |
| 3 (IN+) | Non-inverting input | CMOS input with 0.9 nA bias current; accepts signals from 0 V to VDD; requires matched trace impedance for EMI immunity. |
| 4 (VDD+) | Positive supply | Accepts 2.7–6 V; decoupling capacitor (100 nF X7R) required within 5 mm for stability under dynamic load conditions. |
| 5 (IN−) | Inverting input | High-impedance node; used for feedback configuration (e.g., transimpedance, difference amp); sensitive to PCB leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3 V supply range in single-supply systems, increasing effective ADC resolution by up to 1.5 bits versus non-RRIO op-amps. |
| 23 µA supply current | Reduces quiescent power to 69 µW at 3 V, making it suitable for energy-harvesting and wake-on-event sensor nodes. |
| 220 kHz GBW at 23 µA | Provides 10× higher bandwidth than legacy micropower op-amps (e.g., TLC27L2) at same current, enabling faster settling in multiplexed data acquisition. |
| 106 dB PSRR | Maintains signal integrity when powered from noisy DC-DC converters, reducing need for LDO post-regulation in space-constrained designs. |
| Specified from 2.7 V | Guarantees performance down to end-of-battery voltage in primary-cell applications, avoiding premature system shutdown. |
Applications
| Portable Medical Sensors | Low-Power Data Acquisition |
|---|---|
Use Scenario: Amplifying microvolt-level ECG electrode signals in wearable patch monitors with 3 V coin-cell power. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in first-stage instrumentation topology, providing gain and DC coupling before 16-bit SAR ADC. Use Value: Rail-to-rail output swing preserves full ADC input range; 20 µV offset minimizes baseline correction overhead in firmware. | Use Scenario: Buffering thermistor or RTD bridge outputs in battery-operated environmental loggers. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating high-impedance sensor from ADC sample-and-hold input. Use Value: 0.9 nA input bias current prevents voltage error across 100 kΩ bridge elements; 23 µA current extends logging interval to >2 years. |
| Industrial Process Monitoring | Wearable Health Devices |
Use Scenario: Conditioning 4–20 mA loop receiver outputs in remote IIoT nodes powered by energy harvesting. IC Role / Device Role / Timing Role: Low-drift transimpedance amplifier converting loop current to voltage for microcontroller ADC sampling. Use Value: 106 dB PSRR rejects common-mode noise from long-loop wiring; 220 kHz GBW supports fast transient detection in fault-monitoring algorithms. | Use Scenario: Driving OLED display bias voltage in compact fitness trackers using 3.3 V regulated supply. IC Role / Device Role / Timing Role: Precision voltage reference buffer supplying stable bias to display driver ICs. Use Value: ±10 mA output drive handles capacitive load of display lines without oscillation; rail-to-rail swing ensures accurate 0–3.3 V reference delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461CD | Higher supply current (550 µA), 6.4 MHz GBW, same RRIO, SOIC-8/SOT-23-5 packages available | Designed for higher-speed signal chains (e.g., active filters, audio preamps) where power budget allows | Select TLV2461CD when bandwidth >1 MHz is required and 23 µA quiescent current is insufficient for runtime targets. |
| OPA333AIDBVR | Zero-drift architecture, 17 µA supply current, 350 kHz GBW, 0.1 µV/°C offset drift, SOT-23-5 | Targeted at ultra-stable DC-critical applications (e.g., precision weigh scales, pH meters) requiring sub-µV offset stability over temperature | Choose OPA333AIDBVR when long-term DC accuracy and minimal drift outweigh raw bandwidth needs and cost sensitivity. |
Compared with TLV2451CD, TLV2461CD trades 24× higher supply current for 29× greater bandwidth, while OPA333AIDBVR reduces offset drift by 99.7% but increases cost and limits max small-signal bandwidth to 350 kHz - guiding selection based on whether runtime, speed, or DC precision dominates the system requirement.
Availability
TLV2451CD is available at Aetrix Electronics and suitable for portable medical sensors, low-power data acquisition, industrial process monitoring, and wearable health devices requiring stable component supply across extended production lifecycles.
Supply support for TLV2451CD 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 industrial, automotive, and personal electronics markets.
The TLV245x family was designed specifically for ultralow-power, rail-to-rail signal conditioning in battery-constrained portable instrumentation - balancing bandwidth, precision, and supply current in a single-supply architecture.
FAQ
What is the operating temperature range for TLV2451CD?
The TLV2451CD is rated for an operating free-air temperature range of 0°C to 70°C (C-suffix), as confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the official TI datasheet SLOS218F. This makes it suitable for commercial and consumer-grade portable equipment, but not for extended industrial or automotive under-hood environments requiring −40°C to 125°C operation.
Does TLV2451CD include a shutdown pin?
No, TLV2451CD does not include a shutdown pin. Per the Family Package Table and Pinouts section of the datasheet, only TLV2450, TLV2453, and TLV2455 offer shutdown functionality; TLV2451 is explicitly listed without shutdown ('-' in SHUTDOWN column). Its 5-pin SOT-23 pinout contains OUT, GND, IN+, VDD+, and IN− - no dedicated SHDN terminal.
What is the typical input offset voltage of TLV2451CD and how does it vary with temperature?
The TLV2451CD has a typical input offset voltage of 20 µV at 25°C, with a maximum of 1000 µV across the full 0°C to 70°C range. Its temperature coefficient is 0.3 µV/°C, meaning offset drift contributes less than 15 µV over a 50°C ambient shift - critical for maintaining accuracy in uncalibrated biomedical front-ends where thermal gradients occur.
Can TLV2451CD drive capacitive loads, and what is its phase margin?
Yes, TLV2451CD is stable driving up to 1000 pF capacitive loads, with a measured phase margin of 56° at 25°C (RL = 10 kΩ, CL = 1000 pF), as documented in the Operating Characteristics table. This allows direct connection to ADC input capacitors or long PCB traces without external isolation resistors, simplifying layout in space-constrained portable designs.
What package type and pin count does TLV2451CD use?
TLV2451CD uses the 5-pin SOT-23 (DBV) package, as confirmed in the TLV245x Family Package Table and the dedicated TLV2451 DBV Package Pinout diagram (page 3 of SLOS218F). Pin 1 is identified by a beveled edge or molded dot, and the top-view pin assignment is: 1=OUT, 2=GND, 3=IN+, 4=VDD+, 5=IN−.
TLV2451CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.11V/µs
- Gain Bandwidth Product:
- 220 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 23µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLV2451CD FAQ
1.How can I place an order for TLV2451CD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV2451CD 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 TLV2451CD reliable?
The price and inventory of TLV2451CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV2451CD is usually 5 days.
3.What payment methods are accepted for TLV2451CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV2451CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV2451CD?
TLV2451CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV2451CD 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 TLV2451CD?
For technical support, including TLV2451CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV2451CD requirements.
6.How does Aetrix verify that TLV2451CD is sourced from the original manufacturer or authorized distributors?
All TLV2451CD 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 TLV2451CD meets industry standards.
7.What is the process for return or replacement of TLV2451CD?
All TLV2451CD units undergo pre-shipment inspection (PSI). If there is an issue with TLV2451CD, 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 TLV2451CD part is unused and in its original packaging.
Return procedure for TLV2451CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV2451CD Tags
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