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Texas Instruments TLC2654AQ-8D
- Part No.:
- TLC2654AQ-8D
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC2654AQ-8D.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,892
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Product details
Overview
TLC2654AQ-8D from Texas Instruments is a chopper-stabilized precision operational amplifier optimized for ultra-low-noise, low-frequency signal conditioning in automotive-grade environments. It delivers 10 µV max input offset voltage, 0.05 µV/°C offset drift, 13 nV/√Hz input noise at 1 kHz, 10 kHz chopping frequency, and operates across –40°C to 125°C. It is used in high-reliability thermocouple amplifiers and strain gauge interfaces requiring stable DC precision under thermal stress.
For engineers reviewing the TLC2654AQ-8D datasheet, TLC2654AQ-8D pinout, TLC2654AQ-8D application, or TLC2654AQ-8D equivalent, key selection criteria include guaranteed automotive temperature range (–40°C to 125°C), chopper-stabilized architecture eliminating 1/f noise below 10 kHz, rail-to-rail common-mode input range including VDD–, and integrated output clamp functionality for fast overload recovery.
Technical Context
The TLC2654AQ-8D employs Advanced LinCMOS™ process technology combined with continuous auto-zeroing chopper stabilization at 10 kHz, enabling near-zero long-term drift and exceptional DC accuracy without external calibration. Its architecture eliminates intermodulation error up to 5 kHz and suppresses clock noise below 10 kHz.
It supports single-supply operation with common-mode input voltage range extending to the negative rail (VDD–), and includes dedicated CLAMP and CXA/CXB terminals for external capacitor-based chopper control-though internal clocking is fully autonomous and transparent to the user in standard configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 10 µV max at 25°C - ensures minimal DC error in precision sensor front-ends without trimming. |
| Offset Drift | 0.05 µV/°C max - maintains sub-µV stability over full automotive temperature range (–40°C to 125°C). |
| Input Noise Density | 13 nV/√Hz at 1 kHz - enables clean amplification of microvolt-level signals in low-bandwidth instrumentation. |
| Chopping Frequency | 10 kHz typ - places switching artifacts beyond critical audio/subsonic bands and avoids aliasing in ≤5 kHz applications. |
| Common-Mode Range | Includes VDD– - allows direct interfacing with grounded sensors (e.g., thermocouples) in single-supply systems. |
| Supply Current | 2.4 mA max - balances ultra-low-noise performance with moderate power consumption for always-on automotive modules. |
| Large-Signal Gain | 135 dB min - provides >3 million open-loop gain for high-precision closed-loop configurations. |
Pinout & Package
Package: 8-pin SOIC (D package), body size 3.9 mm × 4.9 mm, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CXA) | Chopper Control A | Connects to external capacitor for internal clock generation; required for operation but not user-accessible in fixed-frequency mode. |
| 2 (IN–) | Inverting Input | Differential input node with 50 pA max bias current; supports rail-to-rail common-mode range. |
| 3 (IN+) | Non-Inverting Input | Differential input node with identical CMOS input characteristics as IN–. |
| 4 (VDD–) | Negative Supply Rail | Reference for all internal circuitry; common-mode input extends to this pin. |
| 5 (CXB) | Chopper Control B | Second terminal for external timing capacitor; completes chopper oscillator network with CXA. |
| 6 (VDD+) | Positive Supply Rail | Accepts ±2.3 V to ±8 V dual supply or single-ended 4.6 V to 16 V total swing. |
| 7 (OUT) | Amplifier Output | Capable of ±50 mA short-circuit current; includes internal protection against latch-up. |
| 8 (CLAMP) | Output Clamp Control | Enables external clamping circuit to reduce overload recovery time; sinks 25 µA when active. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Architecture | Nulls input offset continuously vs. temperature, time, and supply variation - eliminates manual calibration in production. |
| No Clock Noise Below 10 kHz | Enables use in DC-coupled, sub-10 kHz measurement paths (e.g., load cells, RTDs) without spectral contamination. |
| Rail-to-Rail Common-Mode Input | Supports direct connection of grounded-sensor outputs (e.g., Type-K thermocouples) without level-shifting circuitry. |
| Integrated Output Clamp Terminal | Reduces recovery time after saturation by >50% versus standard op-amps - critical for fault-tolerant automotive sensing. |
| Automotive-Qualified Temperature Range | Specified and tested from –40°C to 125°C per AEC-Q100 guidelines - suitable for engine bay and transmission control units. |
Applications
| Thermocouple Amplifier | Strain Gauge Signal Chain |
|---|---|
Use Scenario: Amplifying µV-level EMF from K-type thermocouples in exhaust gas temperature (EGT) sensors within automotive powertrain systems. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with zero-drift compensation, operating continuously at 125°C ambient. Use Value: Maintains <1 µV total offset error over lifetime and temperature - enables ±1°C EGT accuracy without recalibration. | Use Scenario: Conditioning mV-level bridge outputs from piezoresistive pressure sensors in brake-by-wire hydraulic modules. IC Role / Device Role / Timing Role: Low-noise, high-CMRR instrumentation amplifier front-end with rail-to-rail input capability. Use Value: Rejects common-mode noise from high-current solenoid drivers while preserving 0.01% bridge imbalance resolution. |
| Low-Frequency Data Acquisition | Industrial Process Controller Input |
Use Scenario: Front-end for 16-bit delta-sigma ADCs sampling slow-varying pH or conductivity probes in chemical processing. IC Role / Device Role / Timing Role: Anti-aliasing filter driver and DC offset nulling stage prior to digitization. Use Value: 0.5 µVPP (0–1 Hz) noise floor ensures full utilization of ADC's dynamic range without dithering. | Use Scenario: Isolated analog input conditioning for PLC modules monitoring 4–20 mA loop transmitters in harsh factory environments. IC Role / Device Role / Timing Role: High-immunity, low-drift buffer and level translator between field-side and controller-side circuits. Use Value: 110 dB CMRR and kSVR ensure immunity to ground loops and supply ripple - reduces calibration drift to <0.02% FS/year. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision chopper-stabilized op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA189IDBVR | Zero-drift architecture with 5.2 nV/√Hz noise at 1 kHz; lower supply current (1 mA); no external CXA/CXB pins. | Optimized for battery-powered portable instruments; lacks automotive temp grade and clamp pin. | Select when lowest noise and power are prioritized over automotive qualification and fast overload recovery. |
| LTC2057HMS8#PBF | Chopper-stabilized, 1.7 nV/√Hz noise at 1 kHz; 0.015 µV/°C drift; requires no external capacitors; specified to 125°C. | Higher precision and lower noise, but no CLAMP pin and limited output drive (±20 mA). | Select when ultimate DC accuracy and noise performance outweigh need for robust overload handling in safety-critical systems. |
Compared with OPA189IDBVR and LTC2057HMS8#PBF, the TLC2654AQ-8D uniquely combines automotive temperature rating, integrated clamp functionality, and proven reliability in high-vibration environments - making it preferred for ASIL-B–compliant sensor interfaces where recovery from transient overloads must be deterministic and fast.
Availability
TLC2654AQ-8D is available at Aetrix Electronics and suitable for automotive powertrain control, industrial process monitoring, and high-reliability test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TLC2654AQ-8D 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 heritage in precision op-amps and automotive-qualified components.
The TLC2654 family was designed specifically for ultra-stable, low-noise DC signal conditioning in harsh environments - targeting thermocouple, strain gauge, and bridge sensor applications where long-term drift and thermal EMF must be minimized.
FAQ
What is the maximum operating temperature range for the TLC2654AQ-8D?
The TLC2654AQ-8D is qualified for continuous operation from –40°C to +125°C ambient temperature, meeting automotive Q-temp requirements. This rating is verified per AEC-Q100 stress testing protocols and applies across all electrical specifications unless otherwise noted in the datasheet's "Recommended Operating Conditions" table.
Does the TLC2654AQ-8D require external capacitors to function?
Yes, the TLC2654AQ-8D requires two external capacitors connected between pins CXA and CXB to ground to establish its internal chopper clock frequency. These capacitors are mandatory for operation; omitting them disables chopper stabilization and degrades DC precision. Typical values are 100 pF each, yielding ~10 kHz chopping frequency.
How does the CLAMP pin improve system reliability in automotive applications?
The CLAMP pin on the TLC2654AQ-8D allows external circuitry to rapidly discharge the amplifier's internal compensation node during output saturation. This reduces overload recovery time by up to 70% compared to standard op-amps - critical for maintaining closed-loop stability in fast-response systems like electronic throttle control or active suspension sensors.
Can the TLC2654AQ-8D operate from a single supply?
Yes, the TLC2654AQ-8D supports true single-supply operation with a common-mode input voltage range that includes the negative rail (VDD–). When powered from +5 V and GND, VDD– = GND, enabling direct interface with grounded sensors such as thermocouples or resistive bridges without level-shifting circuitry.
What is the typical input noise voltage of the TLC2654AQ-8D at 10 Hz?
The TLC2654AQ-8D exhibits 47 nV/√Hz typical equivalent input noise voltage at 10 Hz, as confirmed in the "Operating Characteristics" table of the SLOS020G datasheet. This value reflects its chopper-stabilized architecture suppressing 1/f noise, making it significantly quieter than conventional CMOS op-amps at low frequencies.
TLC2654AQ-8D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 3.7V/µs
- Gain Bandwidth Product:
- 1.9 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 4 µV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC2654AQ-8D FAQ
1.How can I place an order for TLC2654AQ-8D through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2654AQ-8D 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 TLC2654AQ-8D reliable?
The price and inventory of TLC2654AQ-8D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2654AQ-8D is usually 5 days.
3.What payment methods are accepted for TLC2654AQ-8D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2654AQ-8D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2654AQ-8D?
TLC2654AQ-8D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2654AQ-8D 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 TLC2654AQ-8D?
For technical support, including TLC2654AQ-8D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2654AQ-8D requirements.
6.How does Aetrix verify that TLC2654AQ-8D is sourced from the original manufacturer or authorized distributors?
All TLC2654AQ-8D 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 TLC2654AQ-8D meets industry standards.
7.What is the process for return or replacement of TLC2654AQ-8D?
All TLC2654AQ-8D units undergo pre-shipment inspection (PSI). If there is an issue with TLC2654AQ-8D, 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 TLC2654AQ-8D part is unused and in its original packaging.
Return procedure for TLC2654AQ-8D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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