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Texas Instruments TLC2652ACN
- Part No.:
- TLC2652ACN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC2652ACN.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,456
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Product details
Overview
TLC2652ACN 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 single-supply configurations with rail-to-rail common-mode input down to VDD−, and targets low-level transducer signal conditioning such as thermocouple and strain gauge amplification.
For engineers reviewing the TLC2652ACN datasheet, TLC2652ACN pinout, TLC2652ACN application, or TLC2652ACN equivalent, key selection criteria include ultra-low dc drift performance, internal 450 Hz chopping frequency, output clamp capability, CMOS input stage impedance (>1012 Ω), and guaranteed operation across 0°C to 70°C ambient.
Technical Context
The TLC2652ACN uses Texas Instruments' Advanced LinCMOS™ process with integrated chopper-stabilization circuitry that continuously nulls input offset voltage against temperature, time, and supply variations. Its architecture includes dedicated CLAMP and C RETURN pins for external recovery control and on-chip clock generation at 450 Hz.
It features rail-inclusive common-mode input range (VDD− to VDD+ −1.9 V), 120 dB min CMRR, 110 dB min PSRR, and fast overload recovery enabled by optional external clamping-critical for precision instrumentation front-ends where dc accuracy and stability dominate design requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1 µV max at 25°C - enables sub-microvolt dc measurement fidelity in high-gain sensor interfaces |
| Offset Tempco | 0.003 µV/°C typ - ensures <10 nV drift over 0–70°C ambient, critical for unattended industrial monitoring |
| Open-Loop Gain | 135 dB min - provides >5 million V/V loop gain for stable closed-loop error correction |
| CMRR | 120 dB min - rejects >1 million:1 common-mode interference, essential for bridge sensor excitation |
| Supply Range | ±1.9 V to ±8 V - supports low-voltage battery operation and wide industrial rail flexibility |
| Chopping Frequency | 450 Hz - places switching artifacts below 1 Hz bandwidth, avoiding aliasing in slow-scan data acquisition |
| Input Bias Current | 60 pA max - preserves signal integrity in high-impedance pH or piezoelectric sensor nodes |
Pinout & Package
Package: 14-pin plastic DIP (N), through-hole mounting, 0°C to 70°C operating range (C-suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INT/EXT) | Chopper Clock Mode Select | Ground = internal 450 Hz clock; open or high = external clock input for frequency tuning |
| 2 (CLK IN) | External Clock Input | Accepts TTL/CMOS logic-level clock when INT/EXT is high; no level-shifting required in single-supply use |
| 3 (CLK OUT) | Internal Clock Output | Provides buffered 450 Hz square wave for synchronizing external circuitry or diagnostics |
| 4 (VDD+) | Positive Supply Rail | Connects to +V supply; supports operation down to ±1.9 V total supply swing |
| 5 (OUT) | Amplifier Output | Class AB output stage capable of ±50 mA surge current without latch-up |
| 6 (CLAMP) | Output Clamp Control | Drives external clamp diode to reduce overload recovery time from milliseconds to microseconds |
| 7 (C RETURN) | Chopper Capacitor Return | Reference node for two external stabilization capacitors (CXA, CXB) required for operation |
| 8 (VDD−) | Negative Supply Rail | Connects to −V supply; common-mode input extends to this rail |
| 9 (IN−) | Inverting Input | High-impedance CMOS input (≥1012 Ω); offset-canceled via chopper modulation |
| 10 (IN+) | Non-Inverting Input | Same architecture as IN−; enables precision differential or single-ended configurations |
| 11 (CXA) | Chopper Stabilization Cap A | Connects to external capacitor (typically 1 µF) for auto-zero charge storage |
| 12 (CXB) | Chopper Stabilization Cap B | Second external capacitor node; forms dual-capacitor nulling network with CXA |
| 13 (NC) | No Internal Connection | Not bonded; electrically isolated; must remain unconnected |
| 14 (NC) | No Internal Connection | Not bonded; electrically isolated; must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Architecture | Continuous real-time offset nulling eliminates drift from aging, thermal gradients, and power supply ripple |
| Rail-Inclusive Common-Mode Range | Inputs operate down to VDD−, enabling true single-supply operation with ground-referenced sensors |
| Output Clamp Pin | Reduces overload recovery time by >10× when used with external Schottky diodes |
| ESD Protection | 2000 V HBM per MIL-STD-883C Method 3015.2 - enhances handling robustness in manufacturing |
| Low-Frequency Noise Suppression | Peak-to-peak input noise <2.8 µV (0–10 Hz) - outperforms conventional precision op-amps in sub-Hz applications |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltages from Type K thermocouples in furnace temperature controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and cold-junction compensation interface. Use Value: 1 µV max VIO and 0.003 µV/°C tempco ensure ±0.1°C absolute accuracy over full industrial temperature range. | Use Scenario: Reading mV outputs from Wheatstone bridge strain gauges in load cells and structural health monitors. IC Role / Device Role / Timing Role: Low-drift, high-Z buffer and gain stage before ADC sampling at ≤10 SPS. Use Value: 60 pA max IIB prevents bridge imbalance errors; rail-to-rail input accommodates bridge excitation referenced to system ground. |
| Medical ECG Front-End | High-Accuracy Digital Multimeter (DMM) |
Use Scenario: Amplifying 0.5–5 mV cardiac signals in portable ECG devices with battery-powered single-supply design. IC Role / Device Role / Timing Role: First-stage AC-coupled amplifier with active baseline restoration and anti-alias filtering. Use Value: Chopper frequency at 450 Hz avoids interference with 50/60 Hz mains noise; CLAMP pin enables fast recovery from electrode pop transients. | Use Scenario: DC voltage measurement path in 6½-digit bench DMMs requiring <1 ppm linearity and long-term calibration stability. IC Role / Device Role / Timing Role: Zero-drift integrator and reference buffer in dual-slope or sigma-delta converter analog front-end. Use Value: Guaranteed 1 µV VIO max and <10 nV/°C drift eliminate recalibration drift between annual metrology lab visits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2057CN8#PBF | Zero-drift architecture with 50 nV max VIO, 0.01 µV/°C tempco, 1.5 MHz GBW, SO-8 package | Higher bandwidth but higher noise floor (200 nV/√Hz @ 10 Hz); lacks CLAMP pin and external clock option | Select when higher speed and smaller footprint outweigh need for ultra-low 1/f noise and overload recovery control |
| OPA2189IDR | Zero-drift op-amp with 25 µV max VIO, 0.005 µV/°C tempco, 10 MHz GBW, 8-pin SOIC | Superior dynamic performance but relaxed dc specs; no CLAMP or clock pins; not rated for 0–70°C extended industrial range | Select for mixed-signal systems needing both precision dc gain and fast settling, where chopper artifacts must be filtered |
Compared with LTC2057CN8#PBF and OPA2189IDR, the TLC2652ACN delivers the lowest confirmed input offset voltage (1 µV) and tightest tempco (0.003 µV/°C) in a through-hole DIP package with dedicated clamp and clock control-making it uniquely suited for legacy industrial instrumentation requiring field-serviceable sockets and deterministic low-frequency behavior.
Availability
TLC2652ACN is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, and medical ECG front-end designs requiring stable component supply across long-lifecycle industrial deployments.
Supply support for TLC2652ACN 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 90 years of innovation in precision analog ICs.
The TLC2652ACN belongs to TI's LinCMOS™ chopper-stabilized op-amp family, designed specifically for ultra-low-drift, low-noise instrumentation applications where dc accuracy and long-term stability supersede bandwidth requirements.
FAQ
What is the maximum input offset voltage specification for the TLC2652ACN?
The TLC2652ACN has a maximum input offset voltage of 1 µV at 25°C, tested and guaranteed across its 0°C to 70°C operating temperature range. This value is specified for the 'AC' variant (A-grade) in the 14-pin plastic DIP (N) package, distinguishing it from the standard 'C' version with 3 µV max. The 1 µV limit enables direct use in µV-level transducer interfaces without trimming.
Does the TLC2652ACN require external capacitors, and if so, what values are recommended?
Yes, the TLC2652ACN requires two external capacitors-CXA and CXB-connected to Pins 11 and 12 respectively, with C RETURN (Pin 7) as their common return. Texas Instruments recommends 1 µF tantalum or aluminum electrolytic capacitors rated for ≥10 V, placed within 1 cm of the device. These capacitors form the chopper-stabilization charge storage network essential for achieving the specified 1 µV offset and 0.003 µV/°C tempco.
Can the TLC2652ACN operate from a single supply, and what is its common-mode input range?
Yes, the TLC2652ACN supports true single-supply operation. Its common-mode input voltage range extends from VDD− to VDD+ − 1.9 V, meaning it accepts inputs down to the negative rail-even when VDD− = 0 V (ground). This rail-inclusive behavior allows direct interfacing with ground-referenced sensors like thermocouples or bridge circuits without level-shifting circuitry.
What is the function of the CLAMP pin (Pin 6) on the TLC2652ACN?
The CLAMP pin (Pin 6) on the TLC2652ACN controls an internal clamp circuit that limits output voltage excursion during overload conditions. When connected to an external Schottky diode network, it reduces recovery time from saturation by more than 10×-from milliseconds to sub-microsecond range. This feature is critical in precision integrators or servo loops where rapid return to linear operation prevents control instability or data corruption.
Is the TLC2652ACN pin-compatible with other variants in the TLC2652 family, such as the TLC2652AIN or TLC2652AMN?
Yes, the TLC2652ACN shares identical pinout and package (14-pin N) with all other 14-pin variants including TLC2652AIN and TLC2652AMN. Differences lie solely in temperature rating (0–70°C vs −40–85°C vs −55–125°C) and guaranteed offset voltage (1 µV vs 1 µV vs 3 µV). Electrical compatibility is maintained across variants, allowing drop-in replacement where environmental and drift requirements align.
TLC2652ACN 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:
- 0.5 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
TLC2652ACN FAQ
1.How can I place an order for TLC2652ACN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2652ACN 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 TLC2652ACN reliable?
The price and inventory of TLC2652ACN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2652ACN is usually 5 days.
3.What payment methods are accepted for TLC2652ACN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2652ACN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2652ACN?
TLC2652ACN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2652ACN 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 TLC2652ACN?
For technical support, including TLC2652ACN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2652ACN requirements.
6.How does Aetrix verify that TLC2652ACN is sourced from the original manufacturer or authorized distributors?
All TLC2652ACN 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 TLC2652ACN meets industry standards.
7.What is the process for return or replacement of TLC2652ACN?
All TLC2652ACN units undergo pre-shipment inspection (PSI). If there is an issue with TLC2652ACN, 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 TLC2652ACN part is unused and in its original packaging.
Return procedure for TLC2652ACN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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