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Texas Instruments TLC4502AQD
- Part No.:
- TLC4502AQD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC4502AQD.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,317
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Product details
Overview
TLC4502AQD 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 50 µV maximum input offset voltage (at 25°C), 1 µV/°C drift, 4.7 MHz gain-bandwidth product, and ±50 mA output drive - enabling precision sensor interfacing and data acquisition in automotive-grade industrial systems.
For engineers reviewing the TLC4502AQD datasheet, TLC4502AQD pinout, TLC4502AQD application, or TLC4502AQD equivalent, key selection criteria include its Q-temp automotive qualification (–40°C to 125°C), digital self-calibration circuitry with 300 ms startup time, rail-to-rail output swing, and stable operation driving ≥1000 pF capacitive loads without external compensation.
Technical Context
The TLC4502AQD integrates a successive approximation register (SAR)-based digital calibration engine that measures and stores input offset voltage during power-up, then removes itself from the signal path - delivering true op-amp behavior post-calibration. Its CMOS input stage provides 1 pA typical input bias current and >10¹² Ω input resistance.
It operates from 4 V to 6 V supply, supports rail-to-rail common-mode input range (VDD– to VDD+ – 2.3 V), and maintains 85 dB minimum CMRR and 90 dB minimum PSRR across its full temperature range. The device is characterized for stability with 1000 pF capacitive loads and exhibits 74° phase margin at unity gain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 50 µV max at 25°C - enables sub-0.1% error in 12-bit ADC front-ends without trimming |
| Offset Drift | 1 µV/°C - ensures <100 µV total drift over –40°C to 125°C operating range |
| Gain-Bandwidth Product | 4.7 MHz - supports closed-loop gains up to ~100 at 47 kHz with phase margin >70° |
| Slew Rate | 2.5 V/µs - allows 10 Vpp output at 400 kHz without slewing distortion |
| Output Drive | ±50 mA - directly drives 100 Ω loads or multiple logic inputs without buffers |
| Calibration Time | 300 ms - completes offset correction before system initialization routines finish |
| Operating Temperature | –40°C to 125°C - qualified per automotive Q-temp standards for under-hood applications |
Pinout & Package
Package: SOIC-8 (D package), 150 mil width, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of Channel 1 - high-impedance CMOS node (1 pA bias) |
| 2 | 1IN+ | Non-inverting input of Channel 1 - referenced to GND/VDD– for single-supply operation |
| 3 | 1OUT | Output of Channel 1 - rail-to-rail swing (within 20 mV of rails) with ±50 mA capability |
| 4 | VDD–/GND | Ground reference for single-supply use or negative rail in split-supply configuration |
| 5 | 2IN+ | Non-inverting input of Channel 2 - electrically isolated from Channel 1 inputs |
| 6 | 2IN– | Inverting input of Channel 2 - matched offset and drift characteristics to Channel 1 |
| 7 | 2OUT | Output of Channel 2 - independent output stage; no crosstalk above –80 dB at 1 kHz |
| 8 | VDD+ | Positive supply rail - accepts 4 V to 6 V; internal regulation enables stable biasing |
Key Features
| Feature | Design Value |
|---|---|
| Self-Calibrating Offset | Digitally trims input offset to ≤50 µV within 300 ms at power-on; SAR storage eliminates drift-induced recalibration needs |
| Rail-to-Rail Output | Swings to within 20 mV of VDD+ and VDD–/GND - maximizes dynamic range in 3.3 V or 5 V systems |
| Capacitive Load Drive | Stable with ≥1000 pF load - eliminates need for isolation resistors in DAC buffer or cable-driver designs |
| Q-Temp Automotive Qualification | Tested and screened per AEC-Q100 guidelines for –40°C to 125°C operation - suitable for engine control and ADAS sensors |
| Low Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance pH, thermopile, or piezoelectric sensor interfaces |
Applications
| Strain Gauge Signal Conditioning | Automotive Cabin Temperature Sensor Interface |
|---|---|
Use Scenario: Amplifying low-level mV outputs from Wheatstone bridge strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and offset nulling via calibration cycle. Use Value: 50 µV max offset and 1 µV/°C drift ensure <0.05% full-scale error over temperature - eliminating manual potentiometer adjustment. | Use Scenario: Conditioning analog output from NTC thermistors in HVAC control modules for passenger compartment climate management. IC Role / Device Role / Timing Role: Rail-to-rail output buffer and linearization amplifier operating from 5 V microcontroller supply. Use Value: Stable 4.7 MHz GBW and 2.5 V/µs slew rate support fast thermal transient response (<10 ms settling) while maintaining accuracy across –40°C to 125°C. |
| Portable Digital Scale Front-End | Industrial 4–20 mA Loop Receiver |
Use Scenario: Amplifying µV-level signals from load cell bridges in battery-powered weighing devices. IC Role / Device Role / Timing Role: Low-power, high-precision gain stage with self-calibration to maintain factory calibration over shelf life and usage cycles. Use Value: 300 ms calibration window aligns with MCU boot sequence; 1 pA input bias prevents thermistor loading errors in high-Z bridge arms. | Use Scenario: Converting 4–20 mA loop current to precise 0–5 V signal for PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Precision I-to-V converter with rail-to-rail output driving ADC reference buffer. Use Value: ±50 mA output drive supports direct connection to 100 Ω sense resistor; 85 dB CMRR rejects common-mode noise on long industrial cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AQDGKR | Chopper-stabilized architecture; 10 µV max offset, 0.02 µV/°C drift; higher noise (1.1 µVpp, 0.1–10 Hz) | Superior DC precision but higher 1/f noise - better for ultra-low-drift DC apps, worse for AC-coupled sensor signals | Select OPA2333AQDGKR when sub-10 µV offset and near-zero drift outweigh noise sensitivity; TLC4502AQD preferred for mixed-signal bandwidth-critical use. |
| AD8628ARZ-REEL7 | Zero-drift chopper; 10 µV max offset, 0.01 µV/°C drift; lower GBW (2.5 MHz); not automotive-qualified | Lacks Q-temp rating and 125°C operation - unsuitable for under-hood or extended-temperature industrial deployments | Choose AD8628ARZ-REEL7 for lab-grade instrumentation where ambient temperature is controlled; TLC4502AQD required for automotive or wide-temperature field deployment. |
Compared with OPA2333AQDGKR and AD8628ARZ-REEL7, the TLC4502AQD uniquely balances automotive qualification, 4.7 MHz bandwidth, and 300 ms deterministic calibration - making it optimal for cost-sensitive, high-reliability embedded systems needing guaranteed performance across extreme temperatures without chopper noise penalties.
Availability
TLC4502AQD is available at Aetrix Electronics and suitable for automotive sensor modules, industrial data loggers, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC4502AQD 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 and embedded processing technologies, with decades of expertise in precision amplifiers and automotive-grade components.
The TLC4502AQD belongs to TI's Self-Cal™ precision op-amp family, engineered specifically for applications demanding high DC accuracy, rail-to-rail operation, and robustness in harsh environments - including automotive, industrial sensing, and portable instrumentation.
FAQ
What is the maximum input offset voltage specification for TLC4502AQD over temperature?
The TLC4502AQD has a maximum input offset voltage of 50 µV at 25°C and is specified to remain ≤100 µV across its full operating range of –40°C to 125°C. This value is confirmed in the "electrical characteristics" table for TLC4502Q devices under "Full range" conditions, with VDD = 5 V and RS = 50 Ω test setup.
Does TLC4502AQD require external components to perform self-calibration?
No, the TLC4502AQD performs self-calibration autonomously at power-up using an integrated successive approximation register (SAR) and internal oscillator. No external pins, clocks, or components are needed - calibration completes within 300 ms and the circuit exits the signal path, leaving a standard precision op-amp interface. This behavior is intrinsic to the TLC4502AQD design.
Can TLC4502AQD drive a 1000 pF capacitive load without oscillation?
Yes, the TLC4502AQD is explicitly characterized for stable operation driving ≥1000 pF capacitive loads, as stated in the device description and confirmed in Figure 28 (Phase Margin vs Load Capacitance). At 1000 pF, phase margin remains >60°, ensuring monotonic step response without peaking or ringing - eliminating need for output isolation resistors in DAC buffer or cable driver applications.
What is the supply voltage range for normal operation of TLC4502AQD?
The TLC4502AQD operates from a single supply of 4 V to 6 V, or dual supplies of ±2 V to ±3 V (i.e., total 4 V to 6 V). This range is defined in the "recommended operating conditions" table and validated across –40°C to 125°C. Operation outside this range may cause parametric degradation or damage, per absolute maximum ratings.
Is TLC4502AQD pin-compatible with other devices in the TLC450x family?
Yes, the TLC4502AQD uses the standard SOIC-8 (D package) pinout shared across all TLC4502 variants (e.g., TLC4502CD, TLC4502ID, TLC4502QD), as shown in the "TLC4502 D OR JG PACKAGE (TOP VIEW)" diagram. Pin functions - including dual op-amp channel mapping and supply terminals - are identical, enabling drop-in replacement within the same temperature grade and calibration specification tier.
TLC4502AQD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
TLC4502AQD FAQ
1.How can I place an order for TLC4502AQD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC4502AQD 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 TLC4502AQD reliable?
The price and inventory of TLC4502AQD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC4502AQD is usually 5 days.
3.What payment methods are accepted for TLC4502AQD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC4502AQD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC4502AQD?
TLC4502AQD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC4502AQD 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 TLC4502AQD?
For technical support, including TLC4502AQD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC4502AQD requirements.
6.How does Aetrix verify that TLC4502AQD is sourced from the original manufacturer or authorized distributors?
All TLC4502AQD 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 TLC4502AQD meets industry standards.
7.What is the process for return or replacement of TLC4502AQD?
All TLC4502AQD units undergo pre-shipment inspection (PSI). If there is an issue with TLC4502AQD, 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 TLC4502AQD part is unused and in its original packaging.
Return procedure for TLC4502AQD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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