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Texas Instruments TLV521DCKT
- Part No.:
- TLV521DCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TLV521DCKT.pdf
- Description:
- IC CMOS 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
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Product details
Overview
TLV521DCKT from Texas Instruments is a nanopower, rail-to-rail input/output (RRIO), CMOS-input operational amplifier designed for ultra-low-power signal conditioning in battery-constrained systems. It delivers 350 nA typical supply current, 6 kHz gain-bandwidth product, 3 mV max input offset voltage, and operates across 1.7 V to 5.5 V supply with –40°C to 125°C temperature range - enabling precision sensing in wireless remote sensors and energy-harvesting nodes.
For engineers reviewing the TLV521DCKT datasheet, TLV521DCKT pinout, TLV521DCKT application, or TLV521DCKT equivalent, key selection criteria include its sub-500 nA quiescent current, 1 pA input bias current, RRIO swing within 3 mV of rails at 3.3 V, EMI rejection ratio >121 dB, and SC70-5 package compatibility with space-limited PCB layouts.
Technical Context
The TLV521DCKT employs a dual-input-stage architecture-parallel PMOS and NMOS differential pairs-enabling true rail-to-rail input operation across the full supply range. Its VIP50 process ensures stable performance despite VCM-dependent offset crossover near 1.0 V below V+, requiring careful common-mode voltage planning in high-accuracy designs.
Internally compensated for unity-gain stability, it achieves 6 kHz GBW and 2.5 V/ms slew rate while maintaining <500 nA supply current. Built-in EMI filters suppress RF interference from 400 MHz to 2.4 GHz (EMIRR ≥121 dB), eliminating external shielding in sensitive analog front ends for gas sensors and powerline monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 350 nA typical, 500 nA max - enables multi-year operation on CR2032 coin cells in remote sensor nodes |
| Input Offset Voltage | 3 mV maximum - supports accurate DC-coupled amplification of µV–mV-level transducer signals |
| Input Bias Current | 1 pA - minimizes error in high-impedance circuits (e.g., photodiode, megaohm resistance, charge-sense) |
| Gain-Bandwidth Product | 6 kHz - suitable for low-frequency sensor conditioning (e.g., oxygen sensors, thermal monitors) |
| Common-Mode Range | Rail-to-rail (0 V to V+) - allows direct interfacing with single-supply sensors operating near ground or V+ |
| Output Swing | Within 3 mV of either rail at 3.3 V - maximizes dynamic range in low-voltage systems |
| EMI Rejection Ratio | ≥121 dB at 400–900 MHz - reduces need for external RF filtering in Zigbee/Bluetooth-adjacent designs |
Pinout & Package
TLV521DCKT is housed in a 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained portable and IoT sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Amplified differential signal output; rail-to-rail swing supports full utilization of ADC input range |
| 2 (V−) | Negative Power Supply | Ground reference or negative rail; must be stable and low-noise for precision DC accuracy |
| 3 (IN+) | Noninverting Input | High-impedance (1 pA IB) node for sensor signal routing; EMI-filtered per datasheet |
| 4 (IN−) | Inverting Input | High-impedance feedback node; matched layout critical to minimize VOS drift from parasitic currents |
| 5 (V+) | Positive Power Supply | 1.7–5.5 V supply input; PSRR of 100 dB suppresses supply ripple in battery-powered systems |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 350 nA typical - extends battery life in wireless sensor networks beyond 9 years on CR2032 |
| Rail-to-rail input and output | Full 0 V to V+ common-mode range and 3-mV-from-rail swing at 3.3 V - preserves signal fidelity in single-supply systems |
| EMI-hardened inputs | EMIRR ≥121 dB at cellular/Wi-Fi frequencies - eliminates need for external ferrite beads or RC filters |
| Low input bias current | 1 pA - prevents loading errors in high-Z sensor interfaces (e.g., electrochemical gas sensors) |
| Low input offset drift | 1.5 µV/°C - maintains calibration stability over industrial temperature range (–40°C to 125°C) |
Applications
| Wireless Remote Sensors | Powerline Monitoring |
|---|---|
Use Scenario: Battery-powered environmental sensor node transmitting temperature/humidity via LoRaWAN. IC Role / Device Role / Timing Role: Precision front-end amplifier for thermistor and humidity transducer outputs, conditioning µV–mV signals before 10-bit ADC sampling. Use Value: 350 nA supply current enables >5-year operation on 225 mAh coin cell; RRIO swing maximizes ADC utilization at 2.0–3.0 V declining battery voltage. |
Use Scenario: Non-invasive AC current sensing using Rogowski coil in smart meter auxiliary monitoring circuit. IC Role / Device Role / Timing Role: Low-drift, low-noise integrator and buffer for coil output prior to isolation and digitization. Use Value: 1 pA input bias avoids integration error accumulation; 90 dB CMRR rejects common-mode noise from switching power supplies. |
| Battery-Powered Industrial Sensors | Oxygen & Toxic Gas Detection |
Use Scenario: Portable handheld gas leak detector with electrochemical sensor and 24-hour runtime requirement. IC Role / Device Role / Timing Role: Transimpedance amplifier converting nanoamp-level sensor current to measurable voltage. Use Value: Sub-500 nA total quiescent current meets strict system-level power budget; 3 mV VOS max ensures <0.5% full-scale error at 100 mV output span. |
Use Scenario: Medical-grade portable oxygen analyzer measuring 0–100% O₂ in respiratory therapy devices. IC Role / Device Role / Timing Role: High-accuracy current-to-voltage converter for galvanic oxygen sensor output. Use Value: 1.5 µV/°C TCVOS limits calibration drift to <0.15 mV over 100°C range; EMI hardening prevents false alarms near RF-emitting equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPV821DBVR | Lower 65 nA IQ, but only 1.6 V min supply; 10 kHz GBW; no specified EMIRR | Better for ultra-low-voltage (<1.8 V) energy harvesting; less robust in RF-dense environments | Choose LPV821DBVR when supply drops below 1.7 V and EMI immunity is secondary |
| OPA316IDBVR | Higher 400 µA IQ, 10 MHz GBW, 10 V/ms slew rate; 10 pA IB; no EMI filtering | Suitable for higher-speed sensor interfaces (e.g., fast-response accelerometers); not viable for multi-year battery life | Choose OPA316IDBVR when bandwidth >100 kHz is required and power budget allows >100× higher IQ |
Compared with LPV821DBVR and OPA316IDBVR, TLV521DCKT uniquely balances sub-500 nA power, rail-to-rail operation down to 1.7 V, and certified EMI resilience - making it the only option among the three qualified for long-life, RF-exposed, single-supply precision sensing.
Availability
TLV521DCKT is available at Aetrix Electronics and suitable for wireless remote sensors, battery-powered industrial sensors, and oxygen/toxic gas detection systems requiring stable component supply across extended production lifecycles.
Supply support for TLV521DCKT 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 low-power signal chain design and high-volume manufacturing reliability.
TLV521DCKT belongs to TI's nanopower op amp portfolio, engineered specifically for ultra-long-life, maintenance-free sensing in IoT edge nodes, medical wearables, and energy-harvesting systems where every nanoamp counts.
FAQ
What is the maximum operating temperature for TLV521DCKT?
The TLV521DCKT is rated for continuous operation from –40°C to +125°C ambient temperature, with full electrical specifications guaranteed across this range. Its thermal resistance (RθJA = 269.9°C/W) and junction temperature limit of 150°C ensure reliable performance in industrial and automotive under-hood environments when properly mounted on standard FR-4 PCBs.
Does TLV521DCKT support rail-to-rail input and output simultaneously?
Yes, TLV521DCKT supports true rail-to-rail input (common-mode range from V− to V+) and rail-to-rail output (swing within 3 mV of either rail at 3.3 V supply). This dual RRIO capability allows direct interface with single-supply sensors and ADCs without level-shifting, preserving signal integrity and simplifying PCB layout in low-voltage systems.
What is the input offset voltage specification for TLV521DCKT?
The TLV521DCKT has a maximum input offset voltage of 3 mV at 25°C, with typical value of 0.1 mV. Its offset drift is tightly controlled at ±1.5 µV/°C, ensuring minimal calibration drift over temperature. The offset exhibits a known crossover point ~1.0 V below V+, so designs requiring highest DC accuracy should avoid operating the common-mode voltage near that transition region.
Can TLV521DCKT drive capacitive loads without oscillation?
The TLV521DCKT is unity-gain stable but requires isolation resistance (RISO) for capacitive loads >20 pF. For example, a 50 pF load needs ≥154 kΩ RISO in series with the output. Without RISO, heavy capacitive loading degrades phase margin and may cause peaking or oscillation. The recommended RISO values scale inversely with capacitance per the datasheet Table 1.
Is TLV521DCKT suitable for electrochemical gas sensor interfaces?
Yes, TLV521DCKT is explicitly validated for electrochemical gas sensors including oxygen and toxic gas detectors. Its 1 pA input bias current prevents loading errors in high-impedance sensor outputs, 350 nA supply current extends battery life, and built-in EMI filters reject interference from nearby radios - all confirmed in TI's Application Report SBOA288 for portable gas detection.
TLV521DCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0025V/µs
- Gain Bandwidth Product:
- 6 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 350nA
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TLV521DCKT FAQ
1.How can I place an order for TLV521DCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV521DCKT 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 TLV521DCKT reliable?
The price and inventory of TLV521DCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV521DCKT is usually 5 days.
3.What payment methods are accepted for TLV521DCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV521DCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV521DCKT?
TLV521DCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV521DCKT 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 TLV521DCKT?
For technical support, including TLV521DCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV521DCKT requirements.
6.How does Aetrix verify that TLV521DCKT is sourced from the original manufacturer or authorized distributors?
All TLV521DCKT 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 TLV521DCKT meets industry standards.
7.What is the process for return or replacement of TLV521DCKT?
All TLV521DCKT units undergo pre-shipment inspection (PSI). If there is an issue with TLV521DCKT, 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 TLV521DCKT part is unused and in its original packaging.
Return procedure for TLV521DCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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