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Texas Instruments TLC2654CP
- Part No.:
- TLC2654CP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC2654CP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,414
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Product details
Overview
TLC2654CP from Texas Instruments is a chopper-stabilized operational amplifier optimized for ultra-low-noise, high-precision DC signal conditioning in thermocouple amplifiers and strain gauge interfaces. It delivers 0.5 µV peak-to-peak input noise (0–1 Hz), 10 kHz chopping frequency, and 10 µV max input offset voltage (TLC2654A grade) across 0°C to 70°C, enabling stable sub-microvolt-level measurements in single-supply industrial sensor front-ends.
For engineers reviewing the TLC2654CP datasheet, TLC2654CP pinout, TLC2654CP application, or TLC2654CP equivalent, this page provides verified specifications including noise density (13 nV/√Hz at 1 kHz), CMRR (110 dB min), supply rejection (110 dB min), and clamp-enabled overload recovery - all critical for low-drift instrumentation design.
Technical Context
The TLC2654CP uses Advanced LinCMOS™ process technology with integrated chopper-stabilization circuitry that continuously nulls input offset voltage against temperature drift (≤0.05 µV/°C), power-supply variation, and common-mode shifts. Its 10 kHz chopping frequency eliminates clock noise below 10 kHz and intermodulation error up to 5 kHz.
It supports single-supply operation with rail-to-rail common-mode input range (including VDD–), features an output clamp pin for fast recovery from saturation, and withstands ±100 mA surge currents without latch-up. Internal ESD protection meets MIL-STD-883C, Method 3015 (2000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 10 µV max (TLC2654A grade, 0°C to 70°C) - enables direct amplification of µV-level thermocouple outputs without trimming. |
| Input Noise Voltage | 0.5 µVPP (0–1 Hz), 13 nV/√Hz (1 kHz) - preserves signal integrity in subsonic and DC-coupled precision measurement paths. |
| Chopping Frequency | 10 kHz typ - suppresses 1/f noise while avoiding audible interference and aliasing up to 5 kHz. |
| CMRR / kSVR | 110 dB min each - rejects common-mode and supply ripple in noisy industrial environments with ±2.3 V to ±8 V supplies. |
| Supply Current | 1.5–2.4 mA - supports low-power battery-operated instrumentation without compromising precision. |
| Output Clamp Current | 25 µA on-state - reduces recovery time from saturation in overvoltage transient conditions (e.g., sensor disconnect). |
| Input Bias Current | 50–60 pA typ - minimizes voltage error across high-impedance sources like piezoresistive bridges. |
Pinout & Package
Package: 8-pin Plastic DIP (P package), through-hole mounting, 0°C to 70°C operating range (C-suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CXA | Chopper control capacitor terminal A - connects external capacitor (typically 0.1 µF) to stabilize chopping clock. |
| 2 | IN– | Inverting input - high-impedance CMOS node for feedback network connection. |
| 3 | IN+ | Non-inverting input - accepts low-level sensor signals with rail-to-rail common-mode range (down to VDD–). |
| 4 | VDD– | Negative supply rail - reference for single- or dual-supply operation; common-mode input includes this rail. |
| 5 | CXB | Chopper control capacitor terminal B - completes chopper oscillator loop with CXA; requires matched capacitor. |
| 6 | VDD+ | Positive supply rail - supports ±2.3 V to ±8 V operation; internal biasing derived from differential supply. |
| 7 | OUT | Amplified output - drives 10 kΩ loads with ±4.7 V swing; includes internal clamp diode path to CLAMP pin. |
| 8 | CLAMP | Output clamp control - sinks 25 µA when output saturates, accelerating recovery by shunting excess current. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Continuous real-time offset nulling eliminates thermal drift and time-dependent drift (<0.02 µV/month), critical for unattended monitoring systems. |
| Rail-inclusive common-mode input | Operates with inputs at VDD–, enabling true single-supply sensor interfacing (e.g., grounded thermocouples) without level-shifting circuitry. |
| On-chip output clamp | Dedicated CLAMP pin reduces overload recovery time by actively diverting current during saturation - avoids slow slewing in closed-loop systems. |
| High immunity to supply noise | 110 dB supply voltage rejection ensures stable gain even with noisy DC-DC converters or shared power rails in dense PCB layouts. |
| Robust ESD and surge tolerance | Withstands ±100 mA surge current and 2000 V HBM ESD - suitable for field-deployable equipment subject to handling and environmental transients. |
Applications
| Thermocouple Amplifier | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltages from Type-K thermocouples in HVAC and industrial process controllers. IC Role / Device Role / Timing Role: Precision DC-coupled op-amp providing gain and offset compensation in first-stage signal chain. Use Value: 0.5 µVPP (0–1 Hz) noise and 10 µV max VIO enable <±0.1°C accuracy without calibration drift over temperature. |
Use Scenario: Reading Wheatstone bridge outputs from load cells and pressure sensors in test benches and weighing systems. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end with rail-to-rail input capability. Use Value: 50 pA input bias current prevents bridge imbalance errors; 110 dB CMRR rejects common-mode noise from motor drives nearby. |
| Subsonic Audio Preamp | Low-Frequency Data Acquisition Front-End |
Use Scenario: High-fidelity preamplification of geophone or vibration sensor outputs in seismic monitoring equipment. IC Role / Device Role / Timing Role: Ultra-low-noise chopper-stabilized gain stage for signals below 20 Hz. Use Value: 10 kHz chopping frequency eliminates 1/f noise without introducing aliasing in sub-5 kHz bandwidth applications. |
Use Scenario: Analog front-end for 16-bit+ SAR ADCs in portable environmental sensors (e.g., gas analyzers, water quality meters). IC Role / Device Role / Timing Role: DC-accurate buffer and filter driver ensuring full-scale linearity and minimal offset drift over time. Use Value: 0.05 µV/°C tempco and <0.02 µV/month long-term drift preserve calibration integrity between field recalibrations. |
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 |
|---|---|---|---|
| TLC2652CP | 450 Hz chopping frequency vs. 10 kHz; higher 1/f noise corner but lower clock feedthrough risk. | Better suited for ultra-low-frequency (<100 Hz) applications where clock artifacts must be avoided below 1 kHz. | Select TLC2652CP only if system bandwidth is <500 Hz and clock-induced intermodulation is unacceptable. |
| OPA2189IDR | Zero-drift auto-zero architecture (not chopper); 5.6 nV/√Hz noise at 1 kHz; no external capacitors required. | Preferred for PCB space-constrained designs needing integrated solution without CXA/CXB pins or layout sensitivity. | Choose OPA2189IDR when board area, layout simplicity, or absence of external caps outweigh need for TLC2654CP's 10 kHz chopper advantage. |
Compared with TLC2652CP and OPA2189IDR, the TLC2654CP uniquely balances 10 kHz chopper frequency (enabling wideband low-noise performance), external capacitor control (for tuning stability), and proven ruggedness in industrial temperature ranges - making it optimal for legacy-compatible, high-reliability sensor signal chains.
Availability
TLC2654CP is available at Aetrix Electronics and suitable for thermocouple amplifiers, strain gauge interfaces, and low-frequency data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for TLC2654CP 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 connectivity technologies with over 50 years of innovation in precision analog ICs.
The TLC2654CP belongs to TI's Advanced LinCMOS™ chopper-stabilized op-amp family, designed specifically for high-accuracy, low-drift DC signal conditioning in industrial, test-and-measurement, and sensor interface applications.
FAQ
What is the maximum operating temperature range for the TLC2654CP?
The TLC2654CP is characterized for operation from 0°C to 70°C (C-suffix). Its absolute maximum junction temperature is 150°C, and storage temperature range extends from –65°C to 150°C. For extended temperature grades, consider TLC2654IP (–40°C to 85°C) or TLC2654QP (–40°C to 125°C), but note that the TLC2654CP itself is rated only for commercial temperature operation.
Does the TLC2654CP require external capacitors, and what value is recommended?
Yes, the TLC2654CP requires two external capacitors - one connected between pins CXA (1) and CXB (5) - typically 0.1 µF ceramic (X7R or C0G) with low ESR. These capacitors set the chopper clock frequency and stabilize the internal chopping oscillator. Omitting them disables chopper operation and degrades DC precision and noise performance.
How does the CLAMP pin improve performance in the TLC2654CP?
The CLAMP pin (pin 8) in the TLC2654CP sinks 25 µA when the output saturates, providing a low-impedance path to discharge internal nodes and reduce recovery time from overload. This avoids the slow slewing typical of standard op-amps after saturation, preserving signal fidelity in dynamic sensor applications like impact detection or fast step-response systems.
Is the TLC2654CP pin-compatible with other devices in the TLC2654 family?
Yes - all TLC2654x variants (e.g., TLC2654ACP, TLC2654IP) share identical 8-pin DIP (P-package) pinout and footprint. The TLC2654CP is functionally and physically interchangeable with TLC2654ACP in the same package, differing only in guaranteed VIO (20 µV max vs. 10 µV max) and temperature range (both C-suffix, 0°C–70°C).
Can the TLC2654CP operate from a single 5-V supply?
Yes - the TLC2654CP supports true single-supply operation. Its common-mode input voltage range includes the negative rail (VDD–), so with VDD+ = 5 V and VDD– = 0 V, inputs can swing from 0 V to 2.7 V, and the output delivers ~0.3 V to ~4.7 V into 10 kΩ. No level-shifting or biasing is needed for ground-referenced sensors.
TLC2654CP 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:
- 5 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
TLC2654CP FAQ
1.How can I place an order for TLC2654CP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2654CP 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 TLC2654CP reliable?
The price and inventory of TLC2654CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2654CP is usually 5 days.
3.What payment methods are accepted for TLC2654CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2654CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2654CP?
TLC2654CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2654CP 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 TLC2654CP?
For technical support, including TLC2654CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2654CP requirements.
6.How does Aetrix verify that TLC2654CP is sourced from the original manufacturer or authorized distributors?
All TLC2654CP 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 TLC2654CP meets industry standards.
7.What is the process for return or replacement of TLC2654CP?
All TLC2654CP units undergo pre-shipment inspection (PSI). If there is an issue with TLC2654CP, 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 TLC2654CP part is unused and in its original packaging.
Return procedure for TLC2654CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC2654CP Tags
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LM358DT
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LM358DR
Texas Instruments
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MCP6006UT-E/OT
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LM2902DR
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LM358P
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