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Texas Instruments TLC2654C-14DR
- Part No.:
- TLC2654C-14DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC2654C-14DR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,010
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Product details
Overview
TLC2654C-14DR from Texas Instruments is a chopper-stabilized operational amplifier optimized for ultra-low-noise, high-precision DC signal conditioning. It delivers 0.5 µVPP (0–1 Hz), 10 µV max input offset voltage, 13 nV/√Hz noise at 1 kHz, 10 kHz chopping frequency, and operates from ±2.3 V to ±8 V supplies - ideal for thermocouple amplification and strain gauge front-ends in industrial sensor systems.
For engineers reviewing the TLC2654C-14DR datasheet, TLC2654C-14DR pinout, TLC2654C-14DR application, or TLC2654C-14DR equivalent, key selection criteria include verified low-frequency noise performance, guaranteed offset stability over temperature (0.05 µV/°C max), single-supply-compatible common-mode range (includes VDD–), and availability of external clock control via INT/EXT and CLK IN pins in the 14-pin SOIC package.
Technical Context
The TLC2654C-14DR uses Advanced LinCMOS™ process technology with integrated chopper-stabilization circuitry that continuously nulls input offset voltage across temperature, time, and supply variations. Its 10 kHz chopping frequency eliminates intermodulation error below 5 kHz and ensures no clock noise appears in the 0–10 kHz signal band.
It features dual capacitor terminals (CXA, CXB) for internal chopper timing, an output clamp pin (CLAMP) for fast overload recovery, and rail-to-rail common-mode input range extending to VDD– - enabling true single-supply operation down to ±2.3 V without performance degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 10 µV max at 25°C; enables sub-µV-level DC measurement accuracy in precision instrumentation |
| Offset Drift | 0.05 µV/°C max; ensures stable calibration over industrial temperature range (0°C to 70°C) |
| Input Noise (0–1 Hz) | 0.5 µVPP typ; critical for resolving nanovolt-level thermocouple outputs |
| Input Noise Density | 13 nV/√Hz at 1 kHz; supports low-noise amplification up to audio frequencies |
| Chopping Frequency | 10 kHz typ; places clock artifacts beyond 10 kHz, preserving signal integrity below 5 kHz |
| Supply Voltage Range | ±2.3 V to ±8 V; allows flexible single- or dual-supply operation in battery- or rail-constrained systems |
| Common-Mode Input Range | Includes VDD–; permits direct interfacing with grounded sensors without level-shifting circuitry |
Pinout & Package
Package: 14-pin SOIC (D package), tape-and-reel (R suffix), body width 3.9 mm, JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CXB) | Chopper Timing Capacitor B | Connects external capacitor to set chopper frequency; required for internal clock operation |
| 2 (CXA) | Chopper Timing Capacitor A | Second terminal for external timing capacitor; forms RC network with CXB |
| 3 (NC) | No Internal Connection | Unbonded pin; must be left floating or tied to ground per layout best practice |
| 4 (IN–) | Inverting Input | Differential input node; high-impedance CMOS input (IIB ≤ 60 pA) |
| 5 (IN+) | Non-Inverting Input | Differential input node; supports rail-to-rail common-mode range including VDD– |
| 6 (NC) | No Internal Connection | Unbonded pin; no electrical function |
| 7 (VDD–) | Negative Supply Rail | Reference for internal chopper circuitry and analog core; common return path |
| 8 (INT/EXT) | Internal/External Clock Select | Logic input: low = internal clock (10 kHz), high = accept external clock on Pin 9 |
| 9 (CLK IN) | External Clock Input | Accepts TTL/CMOS clock when INT/EXT = high; no level shifting needed in single-supply config |
| 10 (CLK OUT) | Internal Clock Output | Provides buffered 10 kHz clock signal for synchronizing external circuitry |
| 11 (VDD+) | Positive Supply Rail | Power supply input; supports ±2.3 V to ±8 V operation |
| 12 (OUT) | Amplifier Output | Class AB output stage; drives ≥10 kΩ load with ±4.7 V swing (±5 V supply) |
| 13 (CLAMP) | Output Clamp Control | Active-low clamp enables fast recovery from saturation; sinks 25 µA when asserted |
| 14 (C RETURN) | Capacitor Return Reference | Reference node for CXA/CXB timing capacitors; connects to VDD– in standard configuration |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Architecture | Continuous real-time offset nulling eliminates drift-induced errors in long-duration measurements |
| Low 1/f Noise Performance | 0.5 µVPP (0–1 Hz) enables resolution of microvolt-level DC signals in sensor interfaces |
| High CMRR & PSRR | 110 dB min CMRR and kSVR ensures immunity to power supply ripple and common-mode interference |
| Output Clamp Pin | Reduces overload recovery time by actively limiting output excursion during saturation events |
| Rail-to-Rail Input Capability | Common-mode range includes VDD–, allowing direct connection to grounded transducers without bias networks |
Applications
| Thermocouple Amplifier | Strain Gauge Signal Chain |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltages from Type-K thermocouples in furnace monitoring systems. IC Role / Device Role / Timing Role: Primary DC-coupled gain stage with chopper stabilization to suppress thermal EMF drift and 1/f noise. Use Value: Enables <1°C measurement uncertainty over 0–1000°C range without periodic recalibration. | Use Scenario: Conditioning mV-level bridge outputs from metal foil strain gauges in structural load cells. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with ultra-low input offset and drift. Use Value: Supports 0.01% full-scale accuracy over temperature, eliminating zero-shift compensation circuitry. |
| Low-Frequency Data Acquisition | Medical Sensor Interface |
Use Scenario: Front-end for EEG or ECG analog acquisition where sub-Hz signals require minimal baseline wander. IC Role / Device Role / Timing Role: DC-coupled, low-noise amplifier with 10 kHz chopper frequency to avoid aliasing in sub-5 kHz bands. Use Value: Delivers clean, drift-free amplification with no intermodulation distortion below 5 kHz. | Use Scenario: Biopotential signal conditioning in portable patient monitors measuring skin-surface potentials. IC Role / Device Role / Timing Role: High-input-impedance, low-noise amplifier with ESD-protected inputs (2000 V HBM). Use Value: Maintains signal fidelity while meeting IEC 61000-4-2 compliance requirements for medical-grade devices. |
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 |
|---|---|---|---|
| TLC2652ACD | 450 Hz chopping frequency vs. 10 kHz; higher 1/f noise (1.5 µVPP, 0–10 Hz); lower bandwidth (1.1 MHz GBW) | Better suited for ultra-low-frequency (<100 Hz) applications where clock feedthrough must be minimized | Select TLC2652ACD only if system clock sensitivity mandates sub-kHz chopping; otherwise TLC2654C-14DR offers superior noise and bandwidth |
| OPA2189IDR | Zero-drift architecture (auto-zero + chopper); 5.6 nV/√Hz at 1 kHz; 2 MHz GBW; no external timing caps required | Higher speed and lower broadband noise, but lacks dedicated CLAMP pin and external clock interface | Choose OPA2189IDR for higher-speed precision systems needing simplified layout; retain TLC2654C-14DR when external clock sync or fast overload recovery is required |
Compared with TLC2652ACD and OPA2189IDR, the TLC2654C-14DR uniquely balances ultra-low 1/f noise, programmable clocking, and active output clamping - making it optimal for industrial sensor interfaces demanding both DC precision and robust transient response.
Availability
TLC2654C-14DR is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, and low-frequency data acquisition requiring stable component supply across extended production lifecycles.
Supply support for TLC2654C-14DR 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 digital signal technologies with over 90 years of innovation in precision analog design.
The TLC2654 family was engineered specifically for high-accuracy, low-drift DC signal conditioning in harsh industrial environments - emphasizing chopper-stabilized noise performance, rail-to-rail input capability, and robust ESD protection.
FAQ
What is the maximum operating temperature range for the TLC2654C-14DR?
The TLC2654C-14DR is characterized for operation from 0°C to 70°C (C-suffix). It meets all electrical specifications across this full industrial temperature range, including guaranteed 10 µV max input offset voltage and 0.05 µV/°C max drift. Derating curves for power dissipation are provided in the datasheet for ambient temperatures above 25°C.
Does the TLC2654C-14DR require external capacitors to operate?
Yes, the TLC2654C-14DR requires two external timing capacitors connected between pins CXA (1), CXB (2), and C RETURN (14) to establish its internal chopper clock frequency. These capacitors are mandatory for normal operation; omitting them disables chopper stabilization and degrades DC precision. Typical values are 100 nF ceramic, placed close to the device per layout guidelines.
Can the TLC2654C-14DR be used with a single supply?
Yes, the TLC2654C-14DR supports true single-supply operation because its common-mode input voltage range includes the negative rail (VDD–). When powered from +5 V and GND (i.e., VDD+ = +5 V, VDD– = GND), the input can swing from 0 V to +2.7 V, enabling direct interface with grounded sensors without level-shifting circuitry.
What is the purpose of the CLAMP pin on the TLC2654C-14DR?
Pin 13 (CLAMP) is an active-low output clamp control. When pulled low, it engages an internal current sink (25 µA typical) to rapidly pull the output toward VDD–, reducing recovery time from saturation. This feature is especially valuable in closed-loop systems prone to overloads, such as motor current sensing or fast-settling filter stages using the TLC2654C-14DR.
How does the INT/EXT pin affect clocking behavior in the TLC2654C-14DR?
The INT/EXT pin (Pin 8) selects the clock source: logic low enables the internal 10 kHz chopper clock, while logic high disables it and enables external clocking via CLK IN (Pin 9). When using external clocking, the device synchronizes its chopper action to the applied signal - useful for avoiding beat frequencies in multi-channel synchronized acquisition systems using the TLC2654C-14DR.
TLC2654C-14DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
TLC2654C-14DR FAQ
1.How can I place an order for TLC2654C-14DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2654C-14DR 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 TLC2654C-14DR reliable?
The price and inventory of TLC2654C-14DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2654C-14DR is usually 5 days.
3.What payment methods are accepted for TLC2654C-14DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2654C-14DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2654C-14DR?
TLC2654C-14DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2654C-14DR 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 TLC2654C-14DR?
For technical support, including TLC2654C-14DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2654C-14DR requirements.
6.How does Aetrix verify that TLC2654C-14DR is sourced from the original manufacturer or authorized distributors?
All TLC2654C-14DR 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 TLC2654C-14DR meets industry standards.
7.What is the process for return or replacement of TLC2654C-14DR?
All TLC2654C-14DR units undergo pre-shipment inspection (PSI). If there is an issue with TLC2654C-14DR, 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 TLC2654C-14DR part is unused and in its original packaging.
Return procedure for TLC2654C-14DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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