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Texas Instruments TLC4502AQDG4
- Part No.:
- TLC4502AQDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC4502AQDG4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,445
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Product details
Overview
TLC4502AQDG4 from Texas Instruments is a dual-channel, self-calibrating precision CMOS rail-to-rail output operational amplifier designed for high-accuracy analog signal conditioning in automotive and industrial environments. 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 - enabling precision sensor interfacing and data acquisition in Q-Temp automotive systems.
For engineers reviewing the TLC4502AQDG4 datasheet, TLC4502AQDG4 pinout, TLC4502AQDG4 application, or TLC4502AQDG4 equivalent, this page provides verified technical context, calibrated performance boundaries, package-specific layout guidance, and validated alternatives for automotive-grade signal chain design under –40°C to 125°C operation.
Technical Context
The TLC4502AQDG4 implements digital self-calibration via an integrated successive approximation register (SAR) that measures and stores input offset voltage within 300 ms of power-up, then removes calibration circuitry from the signal path to preserve bandwidth and noise performance. Its rail-to-rail output stage supports full-swing operation into 1 kΩ loads while driving up to 1000 pF capacitive loads stably.
It operates from a single 4 V to 6 V supply (or ±2.5 V dual supply), features 120 dB open-loop gain, 85 dB minimum common-mode rejection ratio over temperature, and maintains 74° phase margin with 100 pF load - confirming robust stability in closed-loop configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 40 µV after self-calibration - enables sub-0.01% accuracy in 12-bit+ measurement systems without trimming. |
| Offset Drift | 1 µV/°C - ensures <±12 µV total drift across –40°C to 125°C, critical for unattended automotive sensors. |
| Input Bias Current | 1 pA typical - allows high-impedance source interfacing (e.g., pH electrodes, piezoresistive bridges) without significant error. |
| Gain-Bandwidth Product | 4.7 MHz - supports stable unity-gain buffering and closed-loop gains up to ~10 at >400 kHz. |
| Slew Rate | 2.5 V/µs - enables accurate reproduction of 1 Vpp signals up to ~400 kHz without slew-induced distortion. |
| Output Drive | ±50 mA - drives low-impedance loads (e.g., 50 Ω cables, ADC reference buffers) directly without external boost stages. |
| Operating Temperature | –40°C to 125°C - qualified for Q-Temp automotive applications per AEC-Q100 stress test requirements. |
Pinout & Package
Package: SOIC-8 (D package), surface-mount, 150 mil width, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output channel A - rail-to-rail swing, ±50 mA capable, connects directly to ADC input or transducer driver. |
| 2 | IN– A | Inverting input for channel A - high-impedance node (10¹² Ω), sensitive to PCB leakage; requires guard ring in precision layouts. |
| 3 | IN+ A | Non-inverting input for channel A - matched to IN– A for optimal CMRR; used in instrumentation amp front-ends. |
| 4 | GND / VDD– | Power return and negative supply reference - must be low-impedance plane; separates analog and digital ground domains. |
| 5 | IN+ B | Non-inverting input for channel B - electrically isolated from channel A; enables dual-sensor differential processing. |
| 6 | IN– B | Inverting input for channel B - matched pair with IN+ B; supports independent gain-setting feedback networks. |
| 7 | OUT B | Inverting amplifier output channel B - identical specs to OUT A; allows dual-channel signal conditioning on single IC. |
| 8 | VDD+ | Positive supply pin - accepts 4 V to 6 V single supply; decoupling capacitor (0.1 µF + 10 µF) required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Self-Calibrating Offset | Digitally trims input offset to ≤40 µV within 300 ms at power-on, then disables calibration circuitry to eliminate noise and power overhead during normal operation. |
| Rail-to-Rail Output | Swings within 10 mV of VDD+ and GND under 1 kΩ load - maximizes dynamic range in single-supply 3.3 V or 5 V systems. |
| Capacitive Load Drive | Stable with ≥1000 pF output capacitance - eliminates need for isolation resistors when driving ADC inputs or long traces. |
| Low Input Current Noise | 0.6 fA/√Hz - preserves signal integrity in high-source-impedance applications like photodiode transimpedance amplifiers. |
| Automotive Qualification | Q-Temp grade with characterization across –40°C to 125°C and compliance to AEC-Q100 stress testing - suitable for engine control, battery monitoring, and ADAS subsystems. |
Applications
| Engine Coolant Temperature Sensing | Automotive Battery Cell Monitoring |
|---|---|
Use Scenario: Amplifying low-level voltage from NTC thermistor in harsh under-hood environment where temperature swings from –40°C to 125°C. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with fixed gain of 10, rejecting common-mode noise from alternator ripple and EMI. Use Value: 40 µV max offset ensures <±0.2°C absolute error over full range; rail-to-rail output fully utilizes 12-bit ADC reference span. | Use Scenario: Measuring individual Li-ion cell voltages in EV battery packs with tight ±2 mV accuracy requirement. IC Role / Device Role / Timing Role: High-input-impedance buffer isolating cell voltage from multiplexer switching transients and protecting against leakage-induced drift. Use Value: 1 pA input bias current prevents >0.1 mV error across 1 MΩ cell impedance; 1 µV/°C drift maintains calibration over thermal cycling. |
| Industrial Pressure Transmitter Signal Conditioning | Portable Digital Scale Load Cell Interface |
Use Scenario: Amplifying mV-level Wheatstone bridge output from MEMS pressure sensor in factory automation equipment. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (with external resistors) providing gain of 100 and rejecting common-mode bridge excitation noise. Use Value: 85 dB min CMRR suppresses 50/60 Hz line noise; self-calibration eliminates manual trim pot adjustment during production calibration. | Use Scenario: Interfacing microvolt-level strain gauge outputs in handheld weighing devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power, low-noise transducer amplifier operating from 3.3 V supply with rail-to-rail output feeding sigma-delta ADC. Use Value: 2.5 V/µs slew rate resolves 100 Hz mechanical vibration without distortion; 12 nV/√Hz input noise preserves 20-bit effective resolution. |
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 | Zero-drift architecture (chopper-stabilized), 12 µV max offset, 0.02 µV/°C drift, but higher 1/f noise and 350 µA supply current per channel. | Better long-term drift stability but unsuitable for low-noise AC-coupled sensor paths due to chopper ripple. | Select OPA2333AQDGKR only when ultra-low drift dominates over noise and power constraints. |
| LMV772MMX/NOPB | General-purpose rail-to-rail op-amp, 800 µV max offset, 5 µV/°C drift, 1.2 MHz GBW, lower cost but no self-calibration. | Lacks auto-zeroing; requires external trimming or software correction for high-accuracy DC measurements. | Choose LMV772MMX/NOPB for cost-sensitive, non-critical applications where ±5 mV offset is acceptable. |
Compared with OPA2333AQDGKR and LMV772MMX/NOPB, the TLC4502AQDG4 uniquely balances low initial offset (40 µV), minimal drift (1 µV/°C), low noise (12 nV/√Hz), and zero additional power overhead post-calibration - making it optimal for automotive and industrial DC precision tasks where calibration simplicity and thermal stability are mandatory.
Availability
TLC4502AQDG4 is available at Aetrix Electronics and suitable for automotive battery management, engine control unit (ECU) signal conditioning, and industrial sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC4502AQDG4 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 experience in high-reliability automotive and industrial components.
The TLC4502AQDG4 belongs to TI's Self-Cal™ precision op-amp product line, engineered specifically for applications demanding guaranteed DC accuracy without manual calibration - targeting automotive sensing, industrial process control, and portable test equipment.
FAQ
What is the calibration time for TLC4502AQDG4 and how does it affect system startup?
The TLC4502AQDG4 completes its self-calibration sequence in 300 ms after power application. During this period, the output may be unstable or undefined; therefore, system firmware must delay signal acquisition or enable downstream circuitry until calibration completes. The calibration circuitry then disconnects entirely, ensuring no impact on bandwidth, noise, or power consumption during normal operation of the TLC4502AQDG4.
Does TLC4502AQDG4 require external components for calibration or is it fully autonomous?
The TLC4502AQDG4 performs full self-calibration autonomously - no external components, clocks, or host intervention are required. Its internal oscillator, SAR register, and D/A converter execute the entire offset measurement and storage sequence internally. Once complete, the TLC4502AQDG4 functions as a standard precision op-amp with no ongoing calibration overhead.
Can TLC4502AQDG4 operate from a single 3.3 V supply?
No - the TLC4502AQDG4 has a minimum supply voltage of 4 V per the recommended operating conditions. It is not specified for reliable operation below 4 V, and attempting 3.3 V operation may result in degraded offset performance, reduced output swing, or failure to complete calibration. For 3.3 V systems, consider TI's OPA333 or similar low-voltage zero-drift alternatives.
What is the maximum capacitive load TLC4502AQDG4 can drive while maintaining stability?
The TLC4502AQDG4 is characterized to remain stable driving up to 1000 pF capacitive loads without external compensation, as confirmed in the datasheet's "Stable Driving 1000 pF Capacitive Loads" specification. This capability eliminates series isolation resistors typically needed with other precision op-amps, simplifying layout and preserving signal fidelity when driving ADC inputs or long PCB traces.
How does the input offset voltage specification of TLC4502AQDG4 compare between initial and calibrated states?
Prior to calibration, the TLC4502AQDG4 exhibits typical input offset voltage of 10 µV and a maximum of 100 µV (per Q-grade electrical characteristics). After the 300 ms self-calibration cycle, offset is digitally trimmed to a guaranteed maximum of 40 µV - a deterministic, repeatable improvement that defines the device's precision operating point for all subsequent use of the TLC4502AQDG4.
TLC4502AQDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TLC4502AQDG4 FAQ
1.How can I place an order for TLC4502AQDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC4502AQDG4 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 TLC4502AQDG4 reliable?
The price and inventory of TLC4502AQDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC4502AQDG4 is usually 5 days.
3.What payment methods are accepted for TLC4502AQDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC4502AQDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC4502AQDG4?
TLC4502AQDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC4502AQDG4 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 TLC4502AQDG4?
For technical support, including TLC4502AQDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC4502AQDG4 requirements.
6.How does Aetrix verify that TLC4502AQDG4 is sourced from the original manufacturer or authorized distributors?
All TLC4502AQDG4 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 TLC4502AQDG4 meets industry standards.
7.What is the process for return or replacement of TLC4502AQDG4?
All TLC4502AQDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC4502AQDG4, 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 TLC4502AQDG4 part is unused and in its original packaging.
Return procedure for TLC4502AQDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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