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Texas Instruments TLC4502AQDR
- Part No.:
- TLC4502AQDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC4502AQDR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
TLC4502AQDR from Texas Instruments is a dual-channel, self-calibrating precision CMOS rail-to-rail output operational amplifier designed for high-accuracy single-supply signal conditioning. It achieves 40 µV maximum input offset voltage (after calibration), 1 µV/°C drift, 1 pA input bias current, and delivers ±50 mA output drive with 4.7 MHz gain-bandwidth product-ideal for automotive sensor front-ends and precision industrial data acquisition.
For engineers reviewing the TLC4502AQDR datasheet, TLC4502AQDR pinout, TLC4502AQDR application, or TLC4502AQDR equivalent, key selection criteria include its Q-Temp automotive qualification (–40°C to 125°C), self-calibration time of 300 ms, rail-to-rail output swing, stability with 1000 pF capacitive loads, and compatibility with low-noise, low-power single-supply systems requiring <50 µV offset performance.
Technical Context
The TLC4502AQDR integrates digital self-calibration circuitry that performs an initial offset trim within 300 ms of power-up, storing correction data in an on-chip successive approximation register (SAR) before disconnecting from the signal path. This architecture eliminates chopper noise and avoids laser trimming while maintaining standard op-amp behavior post-calibration.
It operates from 4 V to 6 V supply, supports rail-to-rail output swing (within 100 mV of rails at ±50 mA), and remains stable driving ≥1000 pF loads without external compensation-enabling direct interface with ADC drivers, precision transducer amplifiers, and active filters in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 40 µV after self-calibration - enables sub-0.01% accuracy in 5 V full-scale measurement systems |
| Offset Drift | 1 µV/°C - ensures <100 µV total drift over –40°C to 125°C automotive temperature range |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance sensor interfaces (e.g., pH electrodes, piezoresistive bridges) |
| Gain-Bandwidth Product | 4.7 MHz - supports closed-loop gains up to 10 at >400 kHz bandwidth for fast-settling data acquisition |
| Slew Rate | 2.5 V/µs - allows 10 Vpp output at 100 kHz without distortion in unity-gain buffer configurations |
| Output Drive | ±50 mA - directly drives 100 Ω loads or multiple CMOS inputs without external buffers |
| Calibration Time | 300 ms - completes offset correction before system initialization routines complete |
Pinout & Package
Package: SOIC-8 (D package), RoHS-compliant, rated for –40°C to 125°C operation per AEC-Q100 stress testing requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input for Channel 1 - high-impedance node requiring guarded layout in microvolt-level applications |
| 2 | 1IN+ | Non-inverting input for Channel 1 - referenced to GND/VDD–; accepts common-mode voltages from rail to rail minus 2.3 V |
| 3 | 1OUT | Amplified output for Channel 1 - rail-to-rail swing supports 0–5 V interfacing with SAR ADCs |
| 4 | VDD–/GND | Ground reference for single-supply operation - must be low-impedance; decoupling critical near pin |
| 5 | 2IN+ | Non-inverting input for Channel 2 - electrically isolated from Channel 1; shares same supply domain |
| 6 | 2IN– | Inverting input for Channel 2 - matched to Pin 1 for differential pair routing in instrumentation amps |
| 7 | 2OUT | Amplified output for Channel 2 - independently buffered; no crosstalk specified below –80 dB |
| 8 | VDD+ | Positive supply rail (4–6 V) - requires 0.1 µF ceramic + 10 µF tantalum decoupling per channel |
Key Features
| Feature | Design Value |
|---|---|
| Self-Calibrating Offset Trim | Digitally corrects input offset to ≤40 µV within 300 ms at power-on, then removes calibration circuitry from signal path |
| Rail-to-Rail Output | Swings within 100 mV of VDD+ and VDD–/GND at ±50 mA load - eliminates level-shifting in 3.3 V/5 V systems |
| Capacitive Load Stability | Stable with ≥1000 pF output capacitance - enables direct connection to long traces or ADC input capacitors |
| Q-Temp Automotive Qualification | Qualified per AEC-Q100 Grade 2 (–40°C to 125°C) with configuration control and extended reliability testing |
| Ultra-Low Input Bias Current | 1 pA typical - minimizes voltage error across >100 MΩ source impedances in precision sensor circuits |
Applications
| Automotive Cabin Pressure Sensor Interface | Industrial Weigh Scale Signal Conditioning |
|---|---|
Use Scenario: Amplifies millivolt-level bridge output from MEMS pressure sensors in HVAC control modules under wide temperature cycling. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with programmable gain, providing offset-corrected analog input to 16-bit ADC. Use Value: 40 µV max offset ensures <0.1% full-scale error over lifetime; rail-to-rail output matches ADC input range without external level shifters. | Use Scenario: Conditions low-level signals from strain-gauge load cells in commercial weighing terminals operating at 24 VDC with battery backup. IC Role / Device Role / Timing Role: Dual-channel transducer amplifier: one channel for excitation regulation, second for differential signal amplification. Use Value: 1 pA input bias prevents drift in high-Z Wheatstone bridge; self-calibration eliminates manual zero-adjust during field maintenance. |
| Medical Patient Monitor ECG Front-End | Test Equipment Low-Noise Reference Buffer |
Use Scenario: First-stage amplification of microvolt-level biopotential signals in portable ECG devices with strict EMC and low-power constraints. IC Role / Device Role / Timing Role: Ultra-low-noise, low-drift instrumentation amplifier with active guarding and right-leg drive support. Use Value: 1 µV/°C drift maintains baseline stability across body-temperature variations; 120 dB open-loop gain enables high CMRR filter designs. | Use Scenario: Buffers precision voltage references (e.g., REF5025) in automated test equipment requiring nanovolt-level stability over 8-hour calibration cycles. IC Role / Device Role / Timing Role: Zero-drift unity-gain buffer isolating reference from switching DAC loads and PCB leakage paths. Use Value: Self-calibration resets thermal drift at startup; 1 pA bias current prevents reference loading-induced errors below 1 ppm. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture (chopper-stabilized), 5.2 MHz GBW, 0.003 µV/°C drift, but higher 1/f noise and 1.3 mA supply current vs. TLC4502AQDR's 3.5 mA | Preferred for ultra-low drift (<0.1 µV/°C) in DC-critical applications; less suitable for high-speed pulse response due to chopping artifacts | Select OPA2189IDR when sub-0.1 µV/°C drift dominates design; choose TLC4502AQDR when low-noise AC performance, capacitive load drive, and automotive qualification are required |
| AD8629ARZ | Zero-drift op-amp with 2.5 MHz GBW, 1 µV/°C drift, 1 pA bias, but only qualified to –40°C to 125°C industrial grade (not AEC-Q100) | Lacks Q-Temp automotive qualification and self-calibration timing control; requires external calibration circuitry for offset reset | Use AD8629ARZ in non-automotive industrial systems where AEC-Q100 is not mandated; TLC4502AQDR is mandatory for automotive OEM designs requiring documented calibration sequence and traceable qualification |
Compared with OPA2189IDR and AD8629ARZ, the TLC4502AQDR uniquely combines AEC-Q100 Grade 2 qualification, deterministic 300-ms self-calibration, rail-to-rail output with ±50 mA drive, and proven stability with 1000 pF loads-making it the only option for automotive safety-critical sensor signal chains requiring both precision and robustness.
Availability
TLC4502AQDR is available at Aetrix Electronics and suitable for automotive cabin control modules, industrial weigh scale electronics, and medical patient monitor front-ends requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for TLC4502AQDR 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 and embedded processing solutions, with over 90 years of innovation in precision analog ICs and automotive electronics.
The TLC450x family was engineered specifically for high-reliability automotive and industrial applications demanding self-calibrating precision without chopper noise-targeting sensor signal conditioning, battery-powered instrumentation, and safety-critical control loops.
FAQ
What is the self-calibration mechanism used in the TLC4502AQDR?
The TLC4502AQDR uses integrated digital self-calibration circuitry that measures input offset voltage during power-up, digitally trims it using an on-chip successive approximation register (SAR), and stores correction data. The calibration completes within 300 ms and the circuitry then disconnects from the signal path-ensuring the TLC4502AQDR behaves as a standard precision op-amp thereafter with no chopper artifacts or increased noise floor.
Does the TLC4502AQDR require external components to perform self-calibration?
No, the TLC4502AQDR performs self-calibration autonomously at power-on without any external components, clocks, or host intervention. The process is fully internal, triggered by supply ramp detection, and requires only proper VDD+/VDD– decoupling. No calibration pins, control signals, or firmware coordination are needed-making the TLC4502AQDR drop-in compatible with legacy op-amp layouts.
What is the maximum capacitive load the TLC4502AQDR can drive while remaining stable?
The TLC4502AQDR is characterized as stable driving ≥1000 pF capacitive loads without external compensation, as confirmed in the official datasheet (SLOS221B, Section 5). This capability enables direct connection to ADC input capacitors, long PCB traces, or multiplexed sensor arrays without added isolation resistors or phase-compensation networks-reducing bill-of-materials and layout complexity in space-constrained designs.
Is the TLC4502AQDR qualified for automotive applications?
Yes, the TLC4502AQDR carries the "Q" suffix indicating Q-Temp automotive qualification. It is tested and qualified per AEC-Q100 Grade 2 standards for operation from –40°C to 125°C, includes configuration control documentation, and meets automotive reliability requirements including HTOL, TC, and ESD testing-making it suitable for engine control, cabin electronics, and ADAS sensor interfaces.
How does the input offset voltage specification of the TLC4502AQDR compare to standard precision op-amps?
The TLC4502AQDR guarantees ≤40 µV maximum input offset voltage after self-calibration-significantly tighter than standard precision op-amps (typically 100–200 µV) and competitive with zero-drift parts. Unlike chopper-stabilized devices, this spec is achieved without 1/f noise modulation or switching artifacts, preserving clean small-signal integrity for both DC and AC-coupled applications using the TLC4502AQDR.
TLC4502AQDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- 4.7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 2.5mA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC4502AQDR FAQ
1.How can I place an order for TLC4502AQDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC4502AQDR 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 TLC4502AQDR reliable?
The price and inventory of TLC4502AQDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC4502AQDR is usually 5 days.
3.What payment methods are accepted for TLC4502AQDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC4502AQDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC4502AQDR?
TLC4502AQDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC4502AQDR 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 TLC4502AQDR?
For technical support, including TLC4502AQDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC4502AQDR requirements.
6.How does Aetrix verify that TLC4502AQDR is sourced from the original manufacturer or authorized distributors?
All TLC4502AQDR 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 TLC4502AQDR meets industry standards.
7.What is the process for return or replacement of TLC4502AQDR?
All TLC4502AQDR units undergo pre-shipment inspection (PSI). If there is an issue with TLC4502AQDR, 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 TLC4502AQDR part is unused and in its original packaging.
Return procedure for TLC4502AQDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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