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Texas Instruments TLC2652AIN
- Part No.:
- TLC2652AIN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC2652AIN.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,043
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Product details
Overview
TLC2652AIN from Texas Instruments is a chopper-stabilized precision operational amplifier designed for ultra-low-drift, low-noise signal conditioning in demanding analog front-ends. It delivers 1 µV max input offset voltage, 0.003 µV/°C typical offset drift, 135 dB min open-loop gain, 120 dB min 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 TLC2652AIN datasheet, TLC2652AIN pinout, TLC2652AIN application, or TLC2652AIN equivalent, key selection criteria include its guaranteed 1 µV max VIO over −40°C to +85°C, chopper-stabilized architecture enabling stable DC performance in strain gauge and thermocouple amplifiers, and compatibility with single-supply configurations down to ±1.9 V.
Technical Context
The TLC2652AIN uses Texas Instruments' Advanced LinCMOS™ process combined with on-chip chopper-stabilization circuitry that continuously nulls input offset voltage against temperature, time, supply, and common-mode variations. Its internal 450 Hz chopping frequency enables exceptional DC precision without external clocking.
It features an output clamp pin (CLAMP) for fast overload recovery, supports external capacitor-based compensation, and includes internal ESD protection rated to 2000 V per MIL-STD-883C Method 3015.2. Input stage withstands ±100 mA surge currents without latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1 µV max at −40°C to +85°C - ensures minimal baseline error in precision DC measurements |
| Offset Drift vs Temp | 0.003 µV/°C typ - maintains sub-microvolt stability across industrial temperature range |
| Open-Loop Gain (AVD) | 135 dB min - provides high closed-loop accuracy and linearity in gain stages |
| CMRR | 120 dB min - rejects common-mode interference in noisy sensor environments |
| Supply Range | ±1.9 V to ±8 V - supports low-voltage single-supply operation and wide dynamic headroom |
| Chopping Frequency | 450 Hz - balances low-frequency noise reduction with minimal switching artifacts |
| Input Bias Current | 150 pA max over full temp range - preserves high-impedance source integrity (e.g., pH electrodes) |
Pinout & Package
The TLC2652AIN is supplied in a 14-pin plastic DIP (N package), with lead finish matte tin and RoHS-compliant construction. Pin assignments are validated per TI SLOS019E datasheet Figure 1 (D014 package top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INT/EXT) | Chopper Clock Mode Select | Ground for internal clock; connect to external source for user-controlled chopping frequency |
| 2 (CLK IN) | External Clock Input | Accepts TTL/CMOS-level clock when INT/EXT = VDD−; no level shifting required in single-supply use |
| 3 (CLK OUT) | Internal Clock Output | Provides buffered 450 Hz clock signal for synchronizing external circuitry |
| 4 (VDD+) | Positive Supply Rail | Connect to +V supply; supports operation down to ±1.9 V total supply |
| 5 (OUT) | Amplifier Output | Class AB output stage capable of ±50 mA short-circuit current; includes CLAMP pin control |
| 6 (CLAMP) | Output Clamp Control | Active-low clamp pin reduces overload recovery time; sinks 25 µA when active |
| 7 (C RETURN) | Capacitor Return Node | Reference node for external stabilization capacitors CXA and CXB |
| 8 (IN−) | Inverting Input | High-impedance CMOS input; common-mode range extends to VDD− |
| 9 (IN+) | Non-Inverting Input | High-impedance CMOS input; matched to IN− for optimal CMRR |
| 10 (VDD−) | Negative Supply Rail | Connect to −V supply; defines reference for all internal biasing and common-mode range |
| 11 (CXA) | Chopper Compensation Cap A | Connects to external capacitor (typically 0.1 µF) for chopper loop stability |
| 12 (CXB) | Chopper Compensation Cap B | Second compensation node; completes chopper stabilization network with CXA |
| 13 (NC) | No Internal Connection | Not bonded; leave unconnected and unpopulated on PCB |
| 14 (NC) | No Internal Connection | Not bonded; leave unconnected and unpopulated on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-Stabilized Architecture | Continuous real-time offset nulling eliminates drift-induced errors in long-duration measurements |
| Rail-to-Rail Common-Mode Input | Input range includes VDD−, enabling true single-supply operation with ground-referenced sensors |
| Output Clamp Pin | Reduces overload recovery time by actively limiting output excursion during saturation |
| Low-Frequency Noise Suppression | Peak-to-peak input noise of 2.8 µV (0–10 Hz) enables resolution of sub-microvolt signals |
| MIL-STD-883C ESD Protection | 2000 V HBM rating ensures robust handling in manufacturing and field deployment |
Applications
| Strain Gauge Amplifier | Thermocouple Signal Conditioning |
|---|---|
Use Scenario: Amplifying microvolt-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 preserve bridge balance accuracy. Use Value: 1 µV max VIO and 0.003 µV/°C drift ensure <0.005% full-scale error over temperature in 10 mV/V bridge outputs. | Use Scenario: Cold-junction compensation and linearization of Type K thermocouples in furnace controllers. IC Role / Device Role / Timing Role: High-input-impedance, low-drift gain stage preceding cold-junction sensor and ADC. Use Value: 150 pA max input bias current prevents voltage drop across high-resistance thermocouple leads and reference junctions. |
| Medical ECG Front-End | High-Precision Data Acquisition |
Use Scenario: First-stage amplification of 0.5–5 mV biopotential signals with >100 dB common-mode rejection. IC Role / Device Role / Timing Role: DC-coupled, chopper-stabilized input buffer rejecting electrode polarization drift and 50/60 Hz interference. Use Value: 120 dB min CMRR and 110 dB min PSRR suppress power-line noise and supply ripple without AC coupling. | Use Scenario: Low-drift gain block in 24-bit sigma-delta ADC reference paths and calibration circuits. IC Role / Device Role / Timing Role: Reference buffer and programmable gain amplifier where long-term offset stability dictates system calibration interval. Use Value: 0.003 µV/°C drift allows annual calibration vs. quarterly for standard precision op amps, reducing maintenance cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision chopper-stabilized op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2057IS8#PBF | 0.5 µV max VIO, 0.005 µV/°C drift, 1.2 MHz GBW, SO-8 package | Higher bandwidth but lower CMRR (130 dB) and no CLAMP pin; requires different compensation | Preferred for higher-speed precision applications where rail-to-rail output swing is critical |
| OPA2189IDR | 0.005 µV/°C drift, 2.5 MHz GBW, zero-drift architecture, dual-channel, SO-8 | Lower noise (5.2 nV/√Hz @ 1 kHz), no external caps needed, but no CLAMP pin or clock access | Best for space-constrained, multi-channel designs requiring auto-zero performance without external components |
Compared with LTC2057IS8#PBF and OPA2189IDR, the TLC2652AIN offers unique user-accessible chopper clock control and dedicated output clamping-critical for overload recovery in sensor front-ends-while maintaining superior low-frequency noise and proven reliability in extended-temperature industrial deployments.
Availability
TLC2652AIN is available at Aetrix Electronics and suitable for industrial instrumentation, medical sensor interfaces, and aerospace-grade data acquisition systems requiring stable component supply across −40°C to +85°C.
Supply support for TLC2652AIN 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The TLC2652 family was engineered for ultra-high-DC-precision analog signal chains-specifically targeting strain gauges, thermocouples, and medical biosensors where microvolt-level stability over temperature and time is non-negotiable.
FAQ
What is the maximum input offset voltage specification for TLC2652AIN over its full operating temperature range?
The TLC2652AIN has a maximum input offset voltage of 2.95 µV across 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 production testing and guarantees sub-3-µV DC error in precision measurement circuits without trimming.
Does TLC2652AIN require external capacitors, and if so, what values are recommended?
Yes, the TLC2652AIN requires two external capacitors (CXA and CXB) connected between pins 11/12 and pin 7 (C RETURN) for chopper loop stability. Texas Instruments recommends 0.1 µF ceramic capacitors rated for ≥16 V, placed as close as possible to the device with short traces to minimize parasitic inductance.
Can TLC2652AIN operate from a single supply, and what is the minimum total supply voltage?
Yes, the TLC2652AIN supports true single-supply operation due to its common-mode input range extending to VDD−. The minimum total supply voltage is ±1.9 V (i.e., 3.8 V total), allowing use with +3.3 V or +5 V rails referenced to ground, provided VDD− is connected to system ground.
What is the function of the CLAMP pin on TLC2652AIN, and how should it be used?
The CLAMP pin (pin 6) on TLC2652AIN is an active-low output clamp control that reduces overload recovery time when driven low. It sinks 25 µA when active and must be pulled high (e.g., via 10 kΩ to VDD+) during normal operation. Use it to limit output excursion during transient overloads in sensor amplifier stages.
Is TLC2652AIN pin-compatible with other devices in the TLC2652 family, such as TLC2652ACN or TLC2652IN?
Yes, all 14-pin DIP variants of the TLC2652 family-including TLC2652ACN (C-temp), TLC2652IN (I-temp), and TLC2652AIN (I-temp, A-grade)-share identical pinouts and footprint. The suffix differences denote temperature grade (I = −40°C to +85°C) and initial offset specification (A = 1 µV max at 25°C), not physical or electrical pin configuration.
TLC2652AIN 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TLC2652AIN FAQ
1.How can I place an order for TLC2652AIN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2652AIN 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 TLC2652AIN reliable?
The price and inventory of TLC2652AIN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2652AIN is usually 5 days.
3.What payment methods are accepted for TLC2652AIN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2652AIN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2652AIN?
TLC2652AIN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2652AIN 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 TLC2652AIN?
For technical support, including TLC2652AIN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2652AIN requirements.
6.How does Aetrix verify that TLC2652AIN is sourced from the original manufacturer or authorized distributors?
All TLC2652AIN 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 TLC2652AIN meets industry standards.
7.What is the process for return or replacement of TLC2652AIN?
All TLC2652AIN units undergo pre-shipment inspection (PSI). If there is an issue with TLC2652AIN, 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 TLC2652AIN part is unused and in its original packaging.
Return procedure for TLC2652AIN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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