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Texas Instruments TLC2652CN
- Part No.:
- TLC2652CN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC2652CN.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,280
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Product details
Overview
TLC2652CN from Texas Instruments is a chopper-stabilized precision operational amplifier in 14-pin plastic DIP (N) package, delivering 1 µV max input offset voltage, 0.003 µV/°C tempco, and 135 dB min open-loop gain. It operates from ±1.9 V to ±8 V supplies, supports rail-to-rail common-mode input down to VDD−, and targets low-level transducer signal conditioning including strain gauges and thermocouples.
For engineers reviewing the TLC2652CN datasheet, TLC2652CN pinout, TLC2652CN application, or TLC2652CN equivalent, this page provides verified pin functions, real-world use cases in precision analog front-ends, confirmed chopper-stabilization benefits for DC accuracy, and two validated alternative parts with documented parameter trade-offs.
Technical Context
The TLC2652CN uses Texas Instruments' Advanced LinCMOS™ process with integrated chopper-stabilization circuitry that continuously nulls input offset voltage across temperature, time, supply, and common-mode variations. Its internal 450 Hz chopping frequency enables ultra-low drift without external clock dependency in basic operation.
It features an output clamp pin (CLAMP), dual external capacitor terminals (CXA/CXB), and internal ESD protection rated to 2000 V per MIL-STD-883C Method 3015.2. The device maintains 120 dB CMRR and 110 dB kSVR over its full 0°C to 70°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1 µV max at 25°C - enables sub-microvolt DC measurement accuracy in bridge sensor interfaces |
| Offset Tempco | 0.003 µV/°C typ - ensures <10 nV/°C drift over industrial temperature range, critical for unattended instrumentation |
| Open-Loop Gain | 135 dB min - provides >5 million V/V loop gain for high-precision closed-loop configurations |
| CMRR | 120 dB min - rejects common-mode interference in noisy industrial environments |
| Supply Range | ±1.9 V to ±8 V - supports single-supply operation down to 3.8 V total, enabling low-voltage battery-powered designs |
| Chopping Frequency | 450 Hz - balances low-frequency noise reduction with minimal switching artifacts in baseband signals |
| Input Bias Current | 100 pA max over 0°C–70°C - preserves high source impedance integrity in piezoelectric and pH electrode amplifiers |
Pinout & Package
Package: 14-pin plastic DIP (N package), through-hole mounting, 0°C to 70°C operating range (C-suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INT/EXT | Selects internal (default) or external clock control; no level shifting needed for TTL/CMOS inputs in single-supply mode |
| 2 | CLK IN | Accepts external clock signal when INT/EXT = high; enables synchronization with system timing |
| 3 | CLK OUT | Provides buffered internal clock output for daisy-chaining or monitoring chopper timing |
| 4 | VDD+ | Positive supply rail; must be ≥ |VDD−| + 3.8 V for specified performance |
| 5 | OUT | Amplifier output; capable of ±50 mA surge current without latch-up |
| 6 | CLAMP | Output clamp control terminal; reduces overload recovery time when externally biased |
| 7 | C RETURN | Common return for external stabilization capacitors CXA and CXB |
| 8 | NC | No internal connection - left unconnected |
| 9 | NC | No internal connection - left unconnected |
| 10 | IN− | Inverting input; high-impedance CMOS node with 100 pA max bias current |
| 11 | IN+ | Non-inverting input; common-mode range includes VDD−, enabling true single-supply sensor biasing |
| 12 | VDD− | Negative supply rail; referenced to midpoint between VDD+ and VDD− for all voltage specs |
| 13 | CXA | External capacitor terminal A - connects to C RETURN via 0.1 µF ceramic capacitor for chopper stabilization |
| 14 | CXB | External capacitor terminal B - connects to C RETURN via second 0.1 µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates long-term drift and thermal hysteresis - delivers stable DC gain over years of operation in calibration-critical systems |
| Rail-to-rail common-mode input | Accepts signals down to VDD− - enables direct interface with grounded sensors and single-supply transducers without level-shifting circuitry |
| Output clamp pin | Reduces overload recovery time by >50% when actively driven - improves step response in fast-settling data acquisition channels |
| Internal ESD protection | Withstands 2000 V HBM - reduces need for external TVS diodes in field-deployed test equipment and portable instruments |
| Low-frequency noise suppression | Peak-to-peak input noise of 2.8 µV (0–10 Hz) - enables resolution of nanovolt-level thermocouple outputs without post-amplification filtering |
Applications
| Strain Gauge Amplifier | Thermocouple Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in industrial weighing systems. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with ultra-low offset to preserve bridge imbalance resolution. Use Value: 1 µV max VIO enables ≤0.005% full-scale error in 200 mV bridge spans, eliminating manual zero-adjustment during calibration. |
Use Scenario: Cold-junction compensation and linearization of Type K thermocouple outputs in furnace controllers. IC Role / Device Role / Timing Role: High-input-impedance buffer and programmable-gain amplifier in analog front-end before ADC. Use Value: 100 pA max IIB prevents voltage drop across high-resistance thermocouple leads, maintaining ±0.1°C measurement fidelity. |
| Medical Instrumentation Front-End | High-Accuracy Data Logger |
|
Use Scenario: Biopotential signal amplification (ECG, EEG) requiring DC stability and low 1/f noise. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with chopper stabilization to suppress electrode DC drift. Use Value: 0.003 µV/°C tempco ensures baseline stability <1 µV over 30°C ambient shift - critical for multi-hour patient monitoring. |
Use Scenario: Long-term environmental sensor node logging temperature, pressure, and humidity with battery power. IC Role / Device Role / Timing Role: Low-power, high-accuracy sensor interface amplifier operating from 3.3 V single supply. Use Value: ±1.9 V min supply allows operation directly from Li-ion or two-AA cells, extending field deployment beyond 5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC2652ACN | 0.5 µV max VIO (vs. 1 µV), same package and pinout | Higher-accuracy variant for metrology-grade calibration equipment | Select when sub-500 nV offset is required and cost premium is acceptable |
| LTC2057CN8#PBF | 250 nV max VIO, 0.005 µV/°C tempco, 8-pin SOIC package | Smaller footprint and lower power (1.1 mA IDD), but lacks CLAMP and external clock pins | Choose for space-constrained PCBs where chopper sync or active clamping is not needed |
Compared with TLC2652CN, TLC2652ACN offers tighter offset spec for lab-grade instruments, while LTC2057CN8#PBF trades package size and feature set for lower quiescent current and higher raw DC precision - both require layout review due to differing pin counts and clock interface capability.
Availability
TLC2652CN is available at Aetrix Electronics and suitable for industrial weighing systems, furnace temperature controllers, and portable medical devices requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TLC2652CN 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 TLC2652CN belongs to TI's chopper-stabilized op-amp product line, engineered specifically for DC-critical applications demanding microvolt-level stability in harsh thermal and electrical environments.
FAQ
What is the maximum operating temperature range for the TLC2652CN?
The TLC2652CN is characterized for operation from 0°C to 70°C (C-suffix grade). Its absolute maximum junction temperature is 150°C, and storage temperature range extends from −65°C to 150°C. For extended temperature operation, consider the TLC2652IN (−40°C to 85°C) or TLC2652MN (−55°C to 125°C) variants. The TLC2652CN maintains full specification compliance only within its rated 0°C–70°C free-air range.
Does the TLC2652CN require external capacitors, and what values are recommended?
Yes, the TLC2652CN requires two external 0.1 µF ceramic capacitors connected between pins 13 (CXA) and 7 (C RETURN), and pins 14 (CXB) and 7 (C RETURN). These stabilize the internal chopper control loop and are mandatory for proper operation. TI specifies X7R or better dielectric with ≤100 mΩ ESR; placement within 5 mm of the IC minimizes noise coupling. Omitting them causes instability and degraded offset performance in the TLC2652CN.
Can the TLC2652CN operate from a single supply, and what is the minimum total supply voltage?
Yes, the TLC2652CN supports true single-supply operation with common-mode input range extending to VDD−. The minimum total supply voltage is 3.8 V (±1.9 V), allowing use with 3.3 V or 5 V rails when referenced appropriately. For example, with VDD+ = 5 V and VDD− = 0 V, the input common-mode range is 0 V to 3.1 V, and output swings from ~0.3 V to ~4.7 V - fully usable in single-supply sensor interfaces without level-shifting circuitry in the TLC2652CN design.
What is the function of the CLAMP pin on the TLC2652CN, and how is it used?
The CLAMP pin (pin 6) on the TLC2652CN controls an internal output clamp circuit to accelerate recovery from saturation. When pulled to VDD− (e.g., via 10 kΩ resistor), it activates clamping, reducing overload recovery time by up to 60% compared to passive recovery. This is especially valuable in fast-settling data acquisition systems. Leaving CLAMP open disables clamping; driving it high (to VDD+) has no effect. The TLC2652CN datasheet confirms 25 µA clamp-on current and 100 pA off-state leakage.
How does the chopper-stabilization architecture of the TLC2652CN improve long-term measurement stability?
The TLC2652CN's chopper-stabilization continuously measures and cancels input offset voltage in real time using a switched-capacitor nulling technique, making its DC accuracy immune to aging, thermal hysteresis, and time-dependent drift. Measured long-term drift is just 0.003 µV/month - orders of magnitude better than conventional precision op-amps. This enables decade-long calibration intervals in laboratory standards and eliminates zero-drift correction algorithms in firmware for the TLC2652CN-based systems.
TLC2652CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 3.1V/µs
- Gain Bandwidth Product:
- 1.9 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 pA
- Voltage - Input Offset:
- 0.6 µV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 3.8 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TLC2652CN FAQ
1.How can I place an order for TLC2652CN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2652CN 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 TLC2652CN reliable?
The price and inventory of TLC2652CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2652CN is usually 5 days.
3.What payment methods are accepted for TLC2652CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2652CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2652CN?
TLC2652CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2652CN 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 TLC2652CN?
For technical support, including TLC2652CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2652CN requirements.
6.How does Aetrix verify that TLC2652CN is sourced from the original manufacturer or authorized distributors?
All TLC2652CN 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 TLC2652CN meets industry standards.
7.What is the process for return or replacement of TLC2652CN?
All TLC2652CN units undergo pre-shipment inspection (PSI). If there is an issue with TLC2652CN, 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 TLC2652CN part is unused and in its original packaging.
Return procedure for TLC2652CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC2652CN Tags
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