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Texas Instruments TLC2654ACP
- Part No.:
- TLC2654ACP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC2654ACP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
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Product details
Overview
TLC2654ACP from Texas Instruments is a chopper-stabilized operational amplifier optimized for ultra-low-noise, high-precision DC signal conditioning. It delivers 10 µV max input offset voltage (TLC2654A grade), 0.5 µVPP (0–1 Hz) input noise, 10 kHz chopping frequency, and rail-to-rail common-mode input range extending to VDD–. It is used in thermocouple amplifiers, strain gauge interfaces, and precision sensor front-ends requiring stable offset and sub-µV noise.
For engineers reviewing the TLC2654ACP datasheet, TLC2654ACP pinout, TLC2654ACP application, or TLC2654ACP equivalent, key selection criteria include verified low-frequency noise performance, guaranteed offset stability over temperature (0.05 µV/°C max), single-supply compatibility down to ±2.3 V, and availability in plastic DIP (P) package with CLAMP, CXA, CXB, and INT/EXT clock control terminals.
Technical Context
The TLC2654ACP implements Advanced LinCMOS™ process technology combined with high-frequency (10 kHz typ) chopper stabilization to continuously null input offset voltage against drift from temperature, time, and supply variations. Its architecture eliminates intermodulation error below 5 kHz and suppresses clock noise below 10 kHz.
It features dual external capacitor inputs (CXA, CXB) for internal chopping capacitor control, an output clamp pin for fast overload recovery, and configurable clock interface (INT/EXT, CLK IN/OUT) accessible in 14-pin and 20-pin packages - though the 8-pin P-package (TLC2654ACP) retains only CLAMP, CXA, CXB, and INT/EXT pins per its pinout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 10 µV max at 25°C (TLC2654A grade); enables <1 µV error in mV-level sensor signals without trimming. |
| Offset Tempco | 0.05 µV/°C max; ensures <0.5 µV drift over 10°C ambient change in precision instrumentation. |
| Input Noise (0–1 Hz) | 0.5 µVPP typ; supports resolution of sub-microvolt DC signals in thermopile or bridge sensors. |
| Chopping Frequency | 10 kHz typ; places clock energy beyond audio band and avoids aliasing in ≤5 kHz signal paths. |
| Common-Mode Range | Includes VDD–; allows true single-supply operation with ground-referenced sensors and rail-to-rail input capability. |
| Supply Voltage Range | ±2.3 V to ±8 V; supports low-voltage battery-powered systems and industrial ±5 V rails. |
| Open-Loop Gain (AVD) | 135 dB min; provides ≥2 million V/V loop gain for high-accuracy closed-loop gain setting. |
Pinout & Package
TLC2654ACP is supplied in an 8-pin plastic DIP (P) package with through-hole mounting and industry-standard 0.3-inch body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CXA) | Chopper Capacitor A | Connects to external capacitor (typically 0.1 µF) to set chopping reference node; required for stabilization. |
| 2 (IN–) | Inverting Input | Differential input terminal; high-impedance CMOS node with 50 pA typical bias current. |
| 3 (IN+) | Non-Inverting Input | Differential input terminal; supports common-mode voltage down to VDD– (rail-to-rail input). |
| 4 (VDD–) | Negative Supply Rail | Reference for all internal circuitry; common return for CXA/CXB capacitors and CLAMP circuit. |
| 5 (CXB) | Chopper Capacitor B | Second external capacitor connection (typically 0.1 µF); completes chopper capacitor network with CXA. |
| 6 (VDD+) | Positive Supply Rail | Power supply input; operates from ±2.3 V to ±8 V; supports single-supply configurations with VDD– = GND. |
| 7 (OUT) | Amplifier Output | Class AB output stage capable of ±50 mA short-circuit current; drives 10 kΩ load to ±4.7 V swing. |
| 8 (CLAMP) | Output Clamp Control | Sinks 25 µA when active; reduces overload recovery time by limiting output excursion during saturation. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Architecture | Nulls input offset in real time across temperature, time, and supply shifts - no manual calibration needed. |
| Ultra-Low 0–1 Hz Noise | 0.5 µVPP enables direct amplification of thermocouple outputs (<100 µV) without AC coupling or filtering. |
| Rail-to-Rail Common-Mode Input | Accepts input signals at VDD– (e.g., ground), simplifying single-supply sensor interfacing without level-shifting. |
| Integrated Output Clamp | Reduces recovery time from saturation by actively limiting output swing - critical for fast step-response applications. |
| Robust ESD Protection | Withstands 2000 V HBM per MIL-STD-883C Method 3015 - improves handling yield in production environments. |
Applications
| Thermocouple Amplifier | Strain Gauge Instrumentation |
|---|---|
Use Scenario: Amplifying microvolt-level Seebeck voltages from Type-K thermocouples in industrial ovens or medical temperature probes. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with chopper stabilization to reject thermal EMF drift and 1/f noise. Use Value: Achieves <0.1°C measurement accuracy without cold-junction compensation hardware due to 10 µV max VIO and 0.05 µV/°C tempco. | Use Scenario: Reading Wheatstone bridge outputs from metal foil strain gauges in load cells or pressure transducers. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance buffer and amplifier for unbalanced bridge configurations. Use Value: Enables 24-bit ADC utilization with <1 LSB error contribution from amplifier noise (0.5 µVPP in 0–1 Hz band). |
| Low-Frequency Sensor Front-End | Subsonic Signal Conditioning |
Use Scenario: Signal conditioning for piezoresistive accelerometers or MEMS microphones operating below 10 Hz. IC Role / Device Role / Timing Role: DC-stable, low-drift gain block with no high-pass filtering required. Use Value: Eliminates need for large coupling capacitors and associated leakage-induced baseline drift in long-duration monitoring. | Use Scenario: Biomedical EEG or geophysical seismic preamplifiers requiring flat response from DC to 5 kHz. IC Role / Device Role / Timing Role: Primary gain stage with 10 kHz chopping frequency ensuring no aliasing or intermodulation distortion below 5 kHz. Use Value: Delivers clean, artifact-free amplification without clock feedthrough - verified by "no clock noise below 10 kHz" specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar chopper-stabilized op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC2652ACP | 450 Hz chopping frequency vs. 10 kHz; higher 0–1 Hz noise (1.5 µVPP); same 10 µV max VIO. | Better suited for ultra-low-frequency (<10 Hz) applications where lower chopping artifacts are prioritized over bandwidth. | Select TLC2652ACP only if system bandwidth is <1 kHz and clock feedthrough sensitivity exceeds 10 kHz rejection requirements. |
| OPA2189IDR | Zero-drift architecture (auto-zero + chopper); 5.6 nV/√Hz @ 1 kHz; 0.005 µV/°C offset drift; SOIC-8 package. | Higher speed (2 MHz GBW), lower noise density, but requires external power supply decoupling and lacks CLAMP pin. | Choose OPA2189IDR for modern PCB designs needing higher bandwidth and lower broadband noise, accepting trade-off of no integrated clamp function. |
Compared with TLC2652ACP and OPA2189IDR, the TLC2654ACP uniquely balances 10 kHz chopping (suppressing aliasing up to 5 kHz), integrated output clamp for fast recovery, and proven reliability in legacy industrial systems - making it optimal for retrofitting or cost-sensitive, low-bandwidth precision analog front-ends.
Availability
TLC2654ACP is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge readout, and low-frequency sensor front-end designs requiring stable component supply across extended temperature ranges (0°C to 70°C).
Supply support for TLC2654ACP 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 logic ICs, with decades of heritage in precision op-amps and industrial-grade components.
The TLC2654ACP belongs to TI's Advanced LinCMOS™ chopper-stabilized op-amp family, engineered specifically for high-accuracy, low-drift DC signal conditioning in harsh industrial and automotive environments.
FAQ
What is the maximum operating temperature range for the TLC2654ACP?
The TLC2654ACP is rated for operation from 0°C to 70°C (C-suffix). Its absolute maximum junction temperature is 150°C, and storage temperature extends from –65°C to 150°C. For extended-range alternatives, consider the TLC2654AIP (–40°C to 85°C) or TLC2654AQ (–40°C to 125°C), both sharing identical electrical specs with enhanced thermal qualification.
Does the TLC2654ACP require external clocking components?
No - the TLC2654ACP uses an internal 10 kHz chopper clock and requires only two external capacitors (CXA and CXB, typically 0.1 µF each) for stabilization. Unlike 14-pin or 20-pin variants, the 8-pin P-package does not expose CLK IN/OUT or INT/EXT pins, so external clock control is not supported on the TLC2654ACP.
Can the TLC2654ACP operate from a single 5-V supply?
Yes - the TLC2654ACP supports single-supply operation with VDD– = 0 V and VDD+ = 5 V. Its common-mode input range includes the negative rail (0 V), and output swings to within 0.3 V of each rail (0.3 V to 4.7 V) under 10 kΩ load, enabling direct interfacing with ground-referenced sensors and 5-V ADCs.
What is the purpose of the CLAMP pin on the TLC2654ACP?
The CLAMP pin on the TLC2654ACP sinks 25 µA when the output saturates, actively limiting voltage excursion and reducing recovery time from overload conditions. This feature is especially valuable in fast-settling instrumentation loops and prevents latch-up during transient overloads - a design advantage not found in standard precision op-amps.
How does the TLC2654ACP compare to standard precision op-amps in low-frequency noise performance?
The TLC2654ACP achieves 0.5 µVPP (0–1 Hz) and 47 nV/√Hz (10 Hz) input noise - significantly lower than non-chopper op-amps like OP07 (200 nV/√Hz @ 0.1 Hz). This is enabled by its chopper-stabilized architecture, which cancels 1/f noise and drift, making the TLC2654ACP uniquely suited for DC-coupled, microvolt-level signal chains where traditional op-amps would require complex filtering or calibration.
TLC2654ACP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC2654ACP FAQ
1.How can I place an order for TLC2654ACP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2654ACP 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 TLC2654ACP reliable?
The price and inventory of TLC2654ACP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2654ACP is usually 5 days.
3.What payment methods are accepted for TLC2654ACP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2654ACP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2654ACP?
TLC2654ACP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2654ACP 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 TLC2654ACP?
For technical support, including TLC2654ACP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2654ACP requirements.
6.How does Aetrix verify that TLC2654ACP is sourced from the original manufacturer or authorized distributors?
All TLC2654ACP 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 TLC2654ACP meets industry standards.
7.What is the process for return or replacement of TLC2654ACP?
All TLC2654ACP units undergo pre-shipment inspection (PSI). If there is an issue with TLC2654ACP, 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 TLC2654ACP part is unused and in its original packaging.
Return procedure for TLC2654ACP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC2654ACP Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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