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Texas Instruments TLC4502QD
- Part No.:
- TLC4502QD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC4502QD.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,400
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Product details
Overview
TLC4502QD 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 –40°C to 125°C), 1 µV/°C offset drift, 1 pA input bias current, 4.7 MHz gain-bandwidth product, and ±50 mA output drive-enabling use in automotive sensor front-ends and industrial data acquisition systems.
For engineers reviewing the TLC4502QD datasheet, TLC4502QD pinout, TLC4502QD application, or TLC4502QD equivalent, key selection considerations include its Q-temp automotive qualification, self-calibration timing (300 ms), rail-to-rail output swing under load, stability with 1000 pF capacitive loads, and operation across –40°C to 125°C without external trimming.
Technical Context
The TLC4502QD integrates digital self-calibration circuitry that measures and stores input offset voltage in an on-chip successive approximation register (SAR) within 300 ms of power-up, then removes itself from the signal path-leaving only a standard precision op amp. Its architecture eliminates chopper noise and laser trimming while maintaining CMOS input stage advantages.
It operates from a single 4 V to 6 V supply (or ±2.5 V dual supply), supports rail-to-rail output swing into ≥1 kΩ loads, and remains stable driving up to 1000 pF-making it suitable for driving ADC inputs, active filters, and precision buffers in harsh-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 50 µV max over –40°C to 125°C - ensures <0.1% error in 12-bit 5 V full-scale systems without trimming |
| Offset Drift | 1 µV/°C - maintains calibration integrity across automotive temperature ranges |
| Gain-Bandwidth Product | 4.7 MHz - supports closed-loop gains up to ~10 at 400 kHz with phase margin >74° |
| Slew Rate | 2.5 V/µs - enables 0–5 V step response in <2.2 µs (0.01% settling) for fast control loops |
| Output Drive | ±50 mA - directly drives low-impedance loads like 100 Ω cables or LED indicators |
| Supply Range | 4 V to 6 V single supply - compatible with 5 V logic rails and automotive 5 V regulators |
| Calibration Time | 300 ms - completes auto-zero before system initialization routines finish |
Pinout & Package
Package: SOIC-8 (D package), 150 mil width, RoHS-compliant, rated for –40°C to 125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of Channel 1 - high-impedance CMOS node (10¹² Ω) |
| 2 | 1IN+ | Non-inverting input of Channel 1 - referenced to GND or common-mode voltage |
| 3 | 1OUT | Output of Channel 1 - rail-to-rail swing (VDD– to VDD+–2.3 V) into ≥1 kΩ |
| 4 | VDD–/GND | Ground reference for single-supply operation - return path for both channels |
| 5 | 2IN+ | Non-inverting input of Channel 2 - electrically isolated from Channel 1 inputs |
| 6 | 2IN– | Inverting input of Channel 2 - matched to Channel 1 for dual-channel instrumentation |
| 7 | 2OUT | Output of Channel 2 - independent output stage with same drive capability as Channel 1 |
| 8 | VDD+ | Positive supply rail - accepts 4 V to 6 V; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Self-Calibrating Offset | Digitally trims input offset to ≤50 µV at power-on, then exits signal path-no chopper noise or duty-cycle artifacts |
| Rail-to-Rail Output | Swings within 2.3 V of either rail at full load - maximizes dynamic range in 5 V systems |
| Capacitive Load Stability | Stable with up to 1000 pF output capacitance - eliminates need for isolation resistors when driving ADC inputs |
| Q-Temp Automotive Qualification | Qualified per AEC-Q100 Grade 2 (–40°C to 105°C ambient) and extended to –40°C to 125°C junction - suitable for engine bay and transmission control units |
| Ultra-Low Input Bias Current | 1 pA typical at 25°C - preserves signal integrity in high-impedance sensor interfaces (e.g., pH electrodes, piezoresistive bridges) |
Applications
| Automotive Sensor Signal Conditioning | Industrial Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying low-level signals from exhaust gas oxygen (EGO) sensors and crankshaft position Hall-effect sensors in engine control modules. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with self-calibrated offset, rejecting common-mode noise from 12 V battery ripple. Use Value: Eliminates manual calibration during manufacturing and maintains accuracy across thermal cycling-reducing test time and field failure rates. | Use Scenario: Buffering and scaling outputs from strain gauges and RTDs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail buffer with matched gain paths, enabling simultaneous sampling of multiple sensor channels. Use Value: 1 pA input bias prevents loading of high-Z Wheatstone bridges; 50 µV offset ensures <0.1% measurement error in 16-bit systems. |
| Portable Digital Scale Electronics | Medical Instrumentation Analog Front-End |
Use Scenario: Amplifying microvolt-level outputs from load cell bridges in battery-powered retail and industrial scales. IC Role / Device Role / Timing Role: Low-power, high-precision instrumentation amplifier core (used in 3-op-amp configuration) with auto-zero initialization. Use Value: 300 ms calibration window aligns with MCU boot sequence; rail-to-rail output maximizes ADC utilization in 3.3 V or 5 V designs. | Use Scenario: Conditioning ECG electrode signals in portable patient monitors where baseline drift must be minimized. IC Role / Device Role / Timing Role: High-input-impedance, low-drift DC amplifier in the first gain stage of a biopotential acquisition chain. Use Value: 1 µV/°C drift prevents thermal-induced baseline wander during multi-hour monitoring sessions; CMOS input avoids skin-electrode polarization errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333QDGKR | Chopper-stabilized (not self-calibrating); 2 µV max offset; 360 kHz GBW; 17 µA supply current | Better low-frequency noise but lower bandwidth; not qualified for automotive temp range | Select when ultra-low 0.1–10 Hz noise dominates system error budget, and bandwidth <400 kHz suffices |
| AD8629ARZ | Zero-drift (auto-zero); 1 µV max offset; 2.5 MHz GBW; 1.2 mA supply current; –40°C to 125°C | Higher quiescent current; no integrated calibration timing control; requires external clock for some variants | Select when tighter offset spec (1 µV vs 50 µV) is mandatory and higher power consumption is acceptable |
Compared with OPA2333QDGKR and AD8629ARZ, the TLC4502QD offers unique Q-temp automotive qualification, deterministic 300 ms calibration startup, and proven stability with heavy capacitive loads-making it optimal for cost-sensitive, thermally demanding sensor signal chains where chopper noise is unacceptable.
Availability
TLC4502QD is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input modules, and portable medical device production requiring stable component supply across extended temperature ranges and long lifecycle commitments.
Supply support for TLC4502QD 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 personal electronics markets.
The TLC450x family was engineered specifically for high-accuracy, single-supply sensor signal conditioning in automotive and industrial environments-prioritizing self-calibration, rail-to-rail output, and robustness over wide temperature ranges without external components.
FAQ
What is the operating temperature range for the TLC4502QD?
The TLC4502QD is specified for continuous operation from –40°C to 125°C junction temperature. It is qualified under Texas Instruments' Q-Temp automotive program, meeting AEC-Q100 stress test requirements for Grade 2 applications, and supports reliable performance in under-hood and transmission control environments where ambient temperatures exceed 105°C.
Does the TLC4502QD require external components to perform self-calibration?
No, the TLC4502QD performs full self-calibration autonomously upon power-up using internal circuitry-including oscillator, SAR register, and D/A converter-without any external pins, clocks, or components. Calibration completes in 300 ms and leaves the device operating as a standard precision op amp with no ongoing overhead or timing dependencies.
Can the TLC4502QD drive a 1000 pF capacitive load without oscillation?
Yes, the TLC4502QD is explicitly characterized and guaranteed stable when driving up to 1000 pF capacitive loads, as confirmed in the datasheet's "Stable Driving 1000 pF Capacitive Loads" feature and Figure 28 (Phase Margin vs Load Capacitance). This eliminates the need for series isolation resistors when interfacing with ADC sample-and-hold inputs or long PCB traces.
How does the input offset voltage specification of TLC4502QD compare to the standard TLC4502CD?
The TLC4502QD guarantees ≤50 µV maximum input offset voltage over –40°C to 125°C, whereas the commercial-grade TLC4502CD specifies ≤100 µV over 0°C to 70°C. The Q-suffix variant achieves tighter initial offset and superior drift control through enhanced process screening and automotive-grade packaging-critical for systems requiring long-term accuracy without recalibration.
Is the TLC4502QD pin-compatible with other devices in the TLC450x family?
Yes, the TLC4502QD uses the standard SOIC-8 (D package) footprint shared across all TLC4501/TLC4502 variants-including TLC4502CD, TLC4502ID, and TLC4502AMD. Pin functions (1IN–, 1IN+, 1OUT, GND, 2IN+, 2IN–, 2OUT, VDD+) are identical, enabling direct substitution in existing layouts when upgrading to automotive-qualified performance.
TLC4502QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
TLC4502QD FAQ
1.How can I place an order for TLC4502QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC4502QD 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 TLC4502QD reliable?
The price and inventory of TLC4502QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC4502QD is usually 5 days.
3.What payment methods are accepted for TLC4502QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC4502QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC4502QD?
TLC4502QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC4502QD 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 TLC4502QD?
For technical support, including TLC4502QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC4502QD requirements.
6.How does Aetrix verify that TLC4502QD is sourced from the original manufacturer or authorized distributors?
All TLC4502QD 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 TLC4502QD meets industry standards.
7.What is the process for return or replacement of TLC4502QD?
All TLC4502QD units undergo pre-shipment inspection (PSI). If there is an issue with TLC4502QD, 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 TLC4502QD part is unused and in its original packaging.
Return procedure for TLC4502QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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