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Texas Instruments TLC2654Q-8D
- Part No.:
- TLC2654Q-8D
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC2654Q-8D.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,759
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Product details
Overview
TLC2654Q-8D from Texas Instruments is a chopper-stabilized operational amplifier optimized for ultra-low-noise, high-precision DC signal conditioning in automotive and industrial environments. It delivers 10 µV max input offset voltage, 0.05 µV/°C tempco, 13 nV/√Hz noise at 1 kHz, and operates across –40°C to +125°C. It is used in thermocouple amplifiers, strain gauge interfaces, and precision sensor front-ends requiring stable gain and minimal drift.
For engineers reviewing the TLC2654Q-8D datasheet, TLC2654Q-8D pinout, TLC2654Q-8D application, or TLC2654Q-8D equivalent, key selection criteria include its 10 kHz chopping frequency (eliminating clock noise below 10 kHz), rail-to-rail common-mode input range including VDD–, and integrated output clamp functionality for fast overload recovery.
Technical Context
The TLC2654Q-8D employs Advanced LinCMOS™ process technology with on-chip chopper-stabilization circuitry that continuously nulls input offset voltage against temperature, time, supply, and common-mode variations. Its fixed 10 kHz internal chopping frequency enables clean noise performance from near-DC up to 10 kHz while eliminating intermodulation error below 5 kHz.
It supports single-supply operation down to ±2.3 V, features CMOS input stage impedance >10¹² Ω, and includes dedicated CLAMP and CXA/CXB terminals for external capacitor connection and optional external clock control - though the 8-pin D package does not expose CLK IN/OUT or INT/EXT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 10 µV max at 25°C; ensures <1 LSB error in 16-bit systems with 10 V full-scale. |
| Offset Tempco | 0.05 µV/°C max; contributes ≤0.6 µV drift over full –40°C to +125°C automotive range. |
| Input Noise Density | 13 nV/√Hz at 1 kHz; enables sub-µV resolution in low-frequency sensor readouts. |
| Chopping Frequency | 10 kHz typ; places switching artifacts beyond audio band and avoids aliasing in ≤5 kHz signals. |
| Common-Mode Range | Includes VDD–; allows direct interface to grounded sensors in single-supply configurations. |
| Supply Voltage Range | ±2.3 V to ±8 V; supports operation from low-voltage battery rails up to industrial ±5 V supplies. |
| Output Clamp Current | 25 µA typ; reduces recovery time after saturation when external clamp diode is connected. |
Pinout & Package
Package: 8-pin SOIC (D package), body size 3.9 mm × 4.9 mm, standard JEDEC MS-012AC.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CXA | Chopper capacitor terminal A; connects to external 0.1 µF capacitor for stabilization. |
| 2 | IN– | Inverting input; high-impedance CMOS node for differential sensing. |
| 3 | IN+ | Non-inverting input; accepts common-mode voltages down to VDD–. |
| 4 | VDD– | Negative supply rail; reference for all internal biasing and common-mode range. |
| 5 | CXB | Chopper capacitor terminal B; completes chopper capacitor network with CXA. |
| 6 | VDD+ | Positive supply rail; supports split or single-supply operation. |
| 7 | OUT | Amplified output; capable of ±4.7 V swing into 10 kΩ load at ±5 V supply. |
| 8 | CLAMP | Output clamp control node; sinks 25 µA when output saturates, enabling fast recovery with external diode. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates long-term drift and 1/f noise without external clock or layout sensitivity. |
| Rail-to-rail common-mode input | Accepts signals referenced to VDD–, simplifying single-supply sensor interfacing. |
| Integrated output clamp | Reduces recovery time from saturation by >50% vs non-clamped op-amps in overload conditions. |
| Automotive-grade qualification | Qualified per AEC-Q100 Grade 1 (–40°C to +125°C) with configuration control and extended reliability testing. |
| Noise immunity with external caps | External CXA/CXB capacitors do not degrade noise performance - critical for stable sensor front-ends. |
Applications
| Thermocouple Amplifier | Strain Gauge Signal Chain |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltages from K-type thermocouples in engine coolant or exhaust gas temperature modules. IC Role / Device Role / Timing Role: Primary DC-coupled instrumentation amplifier stage with ultra-low offset and drift. Use Value: 10 µV max VIO and 0.05 µV/°C tempco enable ±0.5°C accuracy over full automotive temperature range without calibration. |
Use Scenario: Conditioning mV-level bridge outputs from metal foil strain gauges in brake pressure or suspension load sensors. IC Role / Device Role / Timing Role: Low-noise, high-Z buffer and gain stage before ADC sampling. Use Value: 13 nV/√Hz input noise and 10¹² Ω input impedance preserve SNR and prevent loading of high-impedance bridges. |
| Industrial Process Transmitter | Medical Patient Monitoring Front-End |
|
Use Scenario: Signal conditioning for 4–20 mA loop-powered transmitters measuring flow, level, or pressure in harsh factory environments. IC Role / Device Role / Timing Role: Precision I/V conversion and offset correction stage operating from wide supply range. Use Value: ±2.3 V to ±8 V supply support and rail-inclusive common-mode range allow direct use in loop-powered designs with minimal external components. |
Use Scenario: Biopotential amplification in ECG/EMG modules where baseline stability and low-frequency fidelity are critical. IC Role / Device Role / Timing Role: First-stage AC/DC-coupled amplifier with chopper stabilization to suppress electrode drift. Use Value: 0.5 µVPP (0–1 Hz) noise and absence of intermodulation error below 5 kHz ensure clean sub-Hz biopotential waveforms. |
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 |
|---|---|---|---|
| TLC2652AQ-8D | 450 Hz chopping frequency; higher 1/f noise corner but superior long-term stability (0.01 µV/°C max). | Better suited for ultra-stable DC measurements where bandwidth <100 Hz is acceptable. | Choose when lowest possible drift dominates over noise floor; avoid if signal content extends above 200 Hz. |
| OPA2189IDR | Zero-drift auto-zero architecture; 5.2 nV/√Hz noise at 1 kHz, 2 MHz GBW, no external capacitors required. | Higher bandwidth and lower noise, but lacks dedicated clamp pin and automotive Q-temp qualification. | Prefer for high-speed precision applications outside automotive grade requirements; verify ESD robustness for industrial deployment. |
Compared with TLC2652AQ-8D, the TLC2654Q-8D offers wider usable bandwidth and lower broadband noise; compared with OPA2189IDR, it provides guaranteed AEC-Q100 compliance and integrated clamp functionality at the cost of external capacitor dependency and lower GBW.
Availability
TLC2654Q-8D is available at Aetrix Electronics and suitable for automotive powertrain control, industrial process transmitters, and medical sensor modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TLC2654Q-8D 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 decades of automotive and industrial IC design expertise.
The TLC2654 family was designed specifically for high-reliability, low-drift signal conditioning in automotive and industrial environments where traditional op-amps fail due to thermal drift and 1/f noise.
FAQ
What is the maximum operating temperature range for the TLC2654Q-8D?
The TLC2654Q-8D is qualified for continuous operation from –40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for automotive under-hood applications. This rating is confirmed in the "Available Options" table and "Recommended Operating Conditions" section of the SLOS020G datasheet, where Q-suffix devices are explicitly characterized across this full range.
Does the TLC2654Q-8D require external capacitors, and what value is specified?
Yes, the TLC2654Q-8D requires two external 0.1 µF capacitors connected between pins CXA (1) and CXB (5) to ground. These stabilize the internal chopper circuitry and are mandatory for proper operation - the device will not function correctly without them. The datasheet specifies ceramic X7R or better dielectric with low ESR for optimal noise performance.
Can the TLC2654Q-8D operate from a single supply, and what is the minimum supply voltage?
Yes, the TLC2654Q-8D supports true single-supply operation with a common-mode input range that includes the negative rail (VDD–). The minimum total supply voltage is ±2.3 V (i.e., 4.6 V total), allowing use with 5 V single-ended rails when VDD– = 0 V and VDD+ = 5 V - confirmed in the "Recommended Operating Conditions" table under Q-suffix specifications.
What is the purpose of the CLAMP pin (pin 8) on the TLC2654Q-8D?
The CLAMP pin on the TLC2654Q-8D sinks 25 µA when the output saturates, enabling fast recovery via an external Schottky diode connected between OUT and CLAMP. This active clamping reduces overload recovery time significantly compared to passive methods - a feature explicitly documented in the "Electrical Characteristics" table and functional block diagram of the SLOS020G datasheet.
How does the TLC2654Q-8D differ from the standard TLC2654C-8D in terms of precision specifications?
The TLC2654Q-8D maintains the same 10 µV max input offset voltage and 0.05 µV/°C max tempco as the TLC2654AC-8D variant, but is screened and tested across –40°C to +125°C (vs. 0°C to +70°C for C-suffix). Its electrical specs are identical to TLC2654AC-8D at 25°C, but guaranteed over the extended automotive temperature range - verified in the "Electrical Characteristics" tables for Q/AQ variants on pages 9–10 of SLOS020G.
TLC2654Q-8D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC2654Q-8D FAQ
1.How can I place an order for TLC2654Q-8D through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2654Q-8D 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 TLC2654Q-8D reliable?
The price and inventory of TLC2654Q-8D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2654Q-8D is usually 5 days.
3.What payment methods are accepted for TLC2654Q-8D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2654Q-8D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2654Q-8D?
TLC2654Q-8D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2654Q-8D 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 TLC2654Q-8D?
For technical support, including TLC2654Q-8D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2654Q-8D requirements.
6.How does Aetrix verify that TLC2654Q-8D is sourced from the original manufacturer or authorized distributors?
All TLC2654Q-8D 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 TLC2654Q-8D meets industry standards.
7.What is the process for return or replacement of TLC2654Q-8D?
All TLC2654Q-8D units undergo pre-shipment inspection (PSI). If there is an issue with TLC2654Q-8D, 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 TLC2654Q-8D part is unused and in its original packaging.
Return procedure for TLC2654Q-8D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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