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Texas Instruments TLC2652IN
- Part No.:
- TLC2652IN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC2652IN.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,163
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Product details
Overview
TLC2652IN from Texas Instruments is a chopper-stabilized precision operational amplifier optimized for ultra-low-drift, low-noise DC signal conditioning. It delivers 1 µV maximum input offset voltage, 0.003 µV/°C typical offset drift, 135 dB minimum open-loop gain, 120 dB minimum CMRR, and operates from ±1.9 V to ±8 V supplies with rail-to-rail common-mode input range including the negative rail.
For engineers reviewing the TLC2652IN datasheet, TLC2652IN pinout, TLC2652IN application, or TLC2652IN equivalent, this device is selected for high-accuracy transducer interfacing where long-term stability, thermal drift minimization, and single-supply compatibility are critical - especially in strain gauge, thermocouple, and precision sensor front-ends.
Technical Context
The TLC2652IN uses Texas Instruments' Advanced LinCMOS™ process with integrated chopper-stabilization circuitry that continuously nulls input offset voltage in real time across temperature, time, supply, and common-mode variations. Its internal 450 Hz chopping frequency enables sub-microvolt DC precision while suppressing 1/f noise.
It features an output clamp pin (CLAMP) for fast overload recovery, dual external capacitor configuration (CXA/CXB), and user-accessible clock control (INT/EXT, CLK IN/CLK OUT) on 14-pin DIP packages - all while maintaining ±100 mA surge immunity and MIL-STD-883C-compliant ESD protection up to 2000 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1 µV max at 25°C - enables direct amplification of µV-level sensor outputs without calibration drift. |
| Offset Drift vs Temp | 0.003 µV/°C typ - ensures <10 nV/°C variation over full −40°C to +85°C operating range. |
| Open-Loop Gain (AVD) | 135 dB min - supports stable closed-loop gains >5 million with minimal error contribution. |
| CMRR | 120 dB min - rejects common-mode interference in unshielded industrial sensor wiring. |
| Supply Range | ±1.9 V to ±8 V - allows operation from low-voltage battery systems up to industrial ±5 V rails. |
| Chopping Frequency | 450 Hz - balances low-frequency noise reduction with minimal switching artifacts in baseband signals. |
| Input Bias Current | 500 pA max over −40°C to +85°C - preserves high-impedance source integrity (e.g., pH electrodes, piezoresistive sensors). |
Pinout & Package
Package: Plastic Dual In-line Package (PDIP), 14-pin, N suffix - industry-standard through-hole mounting with 0.3-inch body width and 0.1-inch lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INT/EXT) | Chopper Clock Mode Select | Logic input: low = internal clock; high = external clock synchronization (enables multi-device phase alignment). |
| 2 (CLK IN) | External Clock Input | Accepts TTL/CMOS-level square wave (no level shifting required in single-supply mode) to override internal 450 Hz oscillator. |
| 3 (CLK OUT) | Chopper Clock Output | Provides buffered 450 Hz clock signal for synchronizing auxiliary circuitry or adjacent amplifiers. |
| 4 (VDD+) | Positive Supply Rail | Connects to +V supply; supports operation down to ±1.9 V total supply (3.8 V span). |
| 5 (OUT) | Amplifier Output | Class AB output stage capable of ±50 mA short-circuit current and ±4.7 V swing into 10 kΩ load. |
| 6 (CLAMP) | Output Clamp Control | Active-low clamp pin: pulls output toward VDD− when asserted, reducing recovery time after saturation. |
| 7 (C RETURN) | Capacitor Return Reference | Common node for external stabilization capacitors CXA and CXB; tied to VDD− in standard configuration. |
| 8 (VDD−) | Negative Supply Rail | Connects to −V supply; input common-mode range extends to this rail (rail-to-rail input capability). |
| 9 (IN−) | Inverting Input | High-impedance CMOS input (≥10¹² Ω); differential pair node for feedback network connection. |
| 10 (IN+) | Non-Inverting Input | High-impedance CMOS input; accepts signals down to VDD−, enabling true single-supply sensor biasing. |
| 11 (CXA) | Chopper Stabilization Cap A | Connects to external capacitor (typically 0.1 µF) forming part of auto-zero timing network. |
| 12 (CXB) | Chopper Stabilization Cap B | Second external capacitor node; paired with CXA to set chopper sampling interval and noise filtering. |
| 13 (NC) | No Internal Connection | Unbonded pin; must be left floating or grounded per layout best practices (no electrical function). |
| 14 (NC) | No Internal Connection | Unbonded pin; electrically isolated - no routing or connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Architecture | Real-time offset nulling eliminates thermal hysteresis and aging effects - critical for metrology-grade repeatability. |
| Rail-to-Rail Common-Mode Input | Input range includes VDD−, enabling direct interface with ground-referenced sensors in single-supply systems (e.g., 0–5 V microcontroller ADCs). |
| Output Clamp Pin | Reduces overload recovery time from milliseconds to microseconds - essential for fast-settling data acquisition in multiplexed sensor arrays. |
| Internal ESD Protection | Withstands 2000 V HBM per MIL-STD-883C Method 3015.2 - reduces need for external protection in field-deployed instrumentation. |
| External Clock Interface | INT/EXT and CLK IN pins allow synchronous operation of multiple TLC2652IN units to eliminate beat-frequency interference in multi-channel systems. |
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 instrumentation amplifier front-end with ultra-low offset and drift to resolve sub-gram weight changes over temperature cycles. Use Value: 1 µV max VIO and 0.003 µV/°C drift enable ≤0.01% full-scale error over −40°C to +85°C without recalibration. | Use Scenario: Cold-junction compensation and linearization of Type K thermocouple outputs in furnace controllers. IC Role / Device Role / Timing Role: Low-drift, high-impedance buffer and gain stage preceding cold-junction reference and ADC. Use Value: 500 pA max input bias current prevents voltage drop across high-resistance thermocouple leads; rail-to-rail input accommodates 0 V cold-junction reference. |
| High-Accuracy Data Acquisition Front-End | Precision Medical Sensor Interface |
Use Scenario: Signal conditioning for 24-bit delta-sigma ADCs in portable test equipment requiring 16+ ENOB. IC Role / Device Role / Timing Role: DC-coupled, low-noise gain stage with chopper noise suppression below 10 Hz. Use Value: 2.8 µV peak-to-peak input noise (0–10 Hz) and 135 dB AVD ensure minimal contribution to system noise floor and linearity error. | Use Scenario: Biopotential amplification in ECG/EEG modules where electrode half-cell potentials vary widely. IC Role / Device Role / Timing Role: First-stage amplifier with input referenced to patient ground and ability to handle ±300 mV DC offsets. Use Value: Input common-mode range extending to VDD− allows direct connection to Ag/AgCl electrodes without level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA189IDR | Zero-drift architecture with 0.005 µV/°C max drift; lower 1/f noise but fixed 1.8–36 V supply range. | Optimized for battery-powered portable instruments; lacks CLAMP pin and external clock interface. | Select OPA189IDR when ultra-low 1/f noise dominates requirements and chopper synchronization is unnecessary. |
| LTC2057HMS8#PBF | Chopper-stabilized with 0.5 µV max VIO and 0.01 µV/°C max drift; higher supply current (1.1 mA vs 2.4 mA) and no CLAMP pin. | Better suited for space-constrained SMT designs (MSOP-8); not rated for −40°C to +85°C extended temp range. | Select LTC2057HMS8#PBF when board area is constrained and full industrial temperature range is not required. |
Compared with OPA189IDR and LTC2057HMS8#PBF, the TLC2652IN uniquely combines through-hole reliability, user-controllable chopper clocking, output clamping for fast recovery, and guaranteed 1 µV max offset over −40°C to +85°C - making it optimal for ruggedized industrial instrumentation where configurability and thermal robustness are prioritized.
Availability
TLC2652IN is available at Aetrix Electronics and suitable for industrial weighing systems, furnace temperature controllers, portable test equipment, and medical biopotential monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TLC2652IN 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 50 years of innovation in precision analog ICs.
The TLC2652IN belongs to TI's chopper-stabilized op-amp family designed specifically for high-accuracy DC measurement systems where offset, drift, and low-frequency noise directly impact measurement validity - targeting industrial process control, scientific instrumentation, and medical diagnostics.
FAQ
What is the maximum input offset voltage specification for the TLC2652IN over its full operating temperature range?
The TLC2652IN has a maximum input offset voltage of 2.95 µV over its full −40°C to +85°C operating range, as specified in the Electrical Characteristics table for the I-suffix grade. This value reflects worst-case performance across temperature, process, and voltage extremes - significantly tighter than standard precision op-amps and critical for uncalibrated DC measurements.
Does the TLC2652IN require external capacitors, and if so, what are their functions?
Yes, the TLC2652IN requires two external capacitors (CXA and CXB) connected to pins 11 and 12. These capacitors form the timing network for the internal chopper-stabilization circuit, setting the sampling interval and filtering residual switching artifacts. Typical values are 0.1 µF ceramic, placed close to the device with short traces to maintain stability and noise performance.
Can the TLC2652IN operate from a single supply, and what is its input common-mode range in that configuration?
Yes, the TLC2652IN supports true single-supply operation. When powered with VDD+ = +5 V and VDD− = 0 V (ground), its input common-mode range extends from 0 V (VDD−) to +3.1 V - fully encompassing the ground reference. This enables direct interfacing with ground-referenced sensors without level-shifting circuitry, simplifying design in battery-powered or microcontroller-based systems.
What is the purpose of the CLAMP pin on the TLC2652IN, and how is it used?
The CLAMP pin (pin 6) on the TLC2652IN provides active output clamping to accelerate recovery from saturation. When pulled low, it forces the output toward VDD−, reducing recovery time from typical milliseconds to microseconds. This is essential in multiplexed sensor systems or fast-settling data acquisition where amplifier overload must resolve rapidly between channel scans.
How does the TLC2652IN differ from the TLC2652A variant, and why choose the 'I' suffix?
The TLC2652IN is the industrial-grade version (−40°C to +85°C), while the TLC2652A denotes the enhanced accuracy variant (lower initial offset). The 'I' suffix guarantees operation across the extended industrial temperature range with 1 µV max VIO at 25°C and 2.95 µV max over full range - making TLC2652IN the preferred choice for deployed equipment where ambient conditions vary widely and long-term reliability is mandatory.
TLC2652IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Chopper (Zero-Drift)
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 2.8V/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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TLC2652IN FAQ
1.How can I place an order for TLC2652IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2652IN 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 TLC2652IN reliable?
The price and inventory of TLC2652IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2652IN is usually 5 days.
3.What payment methods are accepted for TLC2652IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2652IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2652IN?
TLC2652IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2652IN 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 TLC2652IN?
For technical support, including TLC2652IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2652IN requirements.
6.How does Aetrix verify that TLC2652IN is sourced from the original manufacturer or authorized distributors?
All TLC2652IN 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 TLC2652IN meets industry standards.
7.What is the process for return or replacement of TLC2652IN?
All TLC2652IN units undergo pre-shipment inspection (PSI). If there is an issue with TLC2652IN, 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 TLC2652IN part is unused and in its original packaging.
Return procedure for TLC2652IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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