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Texas Instruments TLC4502QDG4
- Part No.:
- TLC4502QDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC4502QDG4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,852
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Product details
Overview
TLC4502QDG4 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 max 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 in automotive-grade industrial control systems.
For engineers reviewing the TLC4502QDG4 datasheet, TLC4502QDG4 pinout, TLC4502QDG4 application, or TLC4502QDG4 equivalent, this page provides verified electrical specifications, calibrated performance boundaries across –40°C to 125°C, package-validated pin functions, and direct alternatives for high-stability analog front-end design in data acquisition and measurement equipment.
Technical Context
The TLC4502QDG4 integrates digital self-calibration circuitry that performs a one-time 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 (0.01 V to 4.99 V at 5 V), drives 1000 pF capacitive loads stably, and maintains 85 dB minimum CMRR and 90 dB kSVR across its full temperature range - making it suitable for high-common-mode-noise environments like automotive sensor nodes and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 40 µV after calibration - enables sub-0.01% error in 12-bit+ data acquisition systems |
| Offset Drift | 1 µV/°C - ensures <±10 µV total drift over –40°C to 125°C operating range |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance pH, thermopile, or photodiode interfaces |
| Gain-Bandwidth Product | 4.7 MHz - supports closed-loop gains up to ~100 at 47 kHz without phase margin loss |
| Slew Rate | 2.5 V/µs - allows full-scale 2-V step response in ≤0.8 µs for fast-settling ADC drivers |
| Output Drive | ±50 mA - directly drives 100 Ω loads or multiple logic inputs without external buffers |
| Operating Temperature | –40°C to 125°C - qualified for Q-Temp automotive applications per AEC-Q100 stress requirements |
Pinout & Package
Package: SOIC-8 (D package), 150 mil width, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input for Channel 1 - referenced to GND/VDD–; high-impedance node requiring guarded layout |
| 2 | 1IN+ | Non-inverting input for Channel 1 - accepts rail-to-rail common-mode signals up to VDD– and VDD+–2.3 V |
| 3 | 1OUT | Amplified output for Channel 1 - delivers rail-to-rail swing into ≥1 kΩ load or stable into 1000 pF |
| 4 | VDD–/GND | Ground reference for single-supply operation or negative rail in split-supply mode |
| 5 | 2IN+ | Non-inverting input for Channel 2 - electrically isolated from Channel 1; same input specs as Pin 2 |
| 6 | 2IN– | Inverting input for Channel 2 - matched offset and bias characteristics to Pin 1 |
| 7 | 2OUT | Amplified output for 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 ensures stable calibration under supply ripple |
Key Features
| Feature | Design Value |
|---|---|
| Self-Calibration | Digital offset trim completes in ≤300 ms at power-on; SAR storage removes calibration circuit from signal path permanently |
| Rail-to-Rail Output | Swings to within 10 mV of rails at 5 mA load - maximizes dynamic range in 3.3 V or 5 V microcontroller-based systems |
| Capacitive Load Drive | Stable with up to 1000 pF load - eliminates need for isolation resistors in LCD bias or DAC output buffering |
| High PSRR/CMRR | ≥90 dB supply and common-mode rejection - rejects engine noise, switching regulator ripple, and EMI in vehicle ECUs |
| Low Input Noise | 12 nV/√Hz at 1 kHz - preserves SNR in precision weigh scale and medical sensor amplification stages |
Applications
| Automotive Cabin Pressure Sensor Interface | Industrial 4–20 mA Loop Transmitter |
|---|---|
|
Use Scenario: Amplifying low-level bridge outputs from MEMS pressure sensors in HVAC control modules under wide temperature swings. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with self-calibrated offset to maintain <0.1% FS accuracy across –40°C to 125°C. Use Value: Eliminates factory calibration steps and thermal drift compensation firmware, reducing BOM cost and validation time. |
Use Scenario: Driving 4–20 mA current loop with voltage-controlled current source in programmable logic controller (PLC) analog output modules. IC Role / Device Role / Timing Role: High-output-drive rail-to-rail op-amp configured as a Howland current source with 50 mA sink/source capability. Use Value: Enables direct drive of 600 Ω loop impedance at full scale without external transistors or heat sinks. |
| Portable Digital Weigh Scale Front-End | Medical ECG Signal Conditioning |
|
Use Scenario: Amplifying µV-level signals from strain gauge load cells in battery-powered retail scales. IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage with 1 pA input bias to prevent gauge excitation errors and leakage-induced zero drift. Use Value: Achieves 100,000-count resolution with single-supply 3.3 V operation and no external offset nulling components. |
Use Scenario: Buffering and filtering weak biopotential signals (<5 mVpp) in handheld ECG monitors with strict low-power constraints. IC Role / Device Role / Timing Role: Rail-to-rail input/output buffer with 40 µV max offset ensuring baseline stability during patient movement artifacts. Use Value: Maintains diagnostic waveform fidelity without DC restoration circuits, simplifying analog chain and reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift auto-zero architecture; 2 µV max offset, 0.02 µV/°C drift; higher 350 kHz GBW but lower 16 mA output drive | Better long-term drift stability but insufficient output current for 4–20 mA loop drive or capacitive LCD bias | Select when ultra-low drift dominates over output strength; verify layout for auto-zero switching noise immunity |
| AD8629ARZ-REEL7 | Zero-drift topology; 10 µV max offset, 0.1 µV/°C drift; 2.5 V/µs slew rate, ±20 mA output, 2.5 MHz GBW | Lower output drive and bandwidth limit use in fast-settling data acquisition or high-current sensor excitation | Prefer for low-noise, low-power biosignal paths where 20 mA drive suffices; not suitable for direct 100 Ω load driving |
Compared with OPA2333AIDR and AD8629ARZ-REEL7, the TLC4502QDG4 uniquely combines automotive-qualified temperature range, 40 µV calibrated offset, and ±50 mA output in a single SOIC-8 package - making it the only option among the three capable of both precision sensing and direct high-current actuation in space-constrained automotive modules.
Availability
TLC4502QDG4 is available at Aetrix Electronics and suitable for automotive cabin control, industrial process monitoring, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC4502QDG4 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 solutions, with decades of expertise in precision signal chain components.
The TLC4502QDG4 belongs to TI's Self-Cal™ precision op-amp family, engineered specifically for high-reliability automotive and industrial applications where factory calibration, thermal drift, and supply noise would otherwise degrade measurement accuracy.
FAQ
What is the calibration mechanism used in the TLC4502QDG4?
The TLC4502QDG4 uses integrated digital self-calibration circuitry that measures and corrects input offset voltage during initial power-up. Within 300 ms, it digitally trims the offset to ≤40 µV and stores the correction value in an on-chip successive approximation register (SAR). After calibration, the circuit disconnects from the signal path, allowing the device to operate as a standard precision op-amp with no ongoing calibration overhead or switching noise.
Does the TLC4502QDG4 require external components to achieve rail-to-rail output operation?
No, the TLC4502QDG4 achieves true rail-to-rail output swing (within 10 mV of VDD+ and VDD–/GND) without external components. Its output stage is internally optimized for single-supply operation and remains stable driving up to 1000 pF capacitive loads - eliminating the need for isolation resistors or external compensation networks in most applications.
Is the TLC4502QDG4 pin-compatible with other devices in the TLC450x family?
Yes, the TLC4502QDG4 shares identical SOIC-8 pinout with TLC4502CD, TLC4502ID, and TLC4502MD variants. All TLC4502-xD parts use the same 1–8 pin mapping shown in the datasheet Figure "TLC4502 D OR JG PACKAGE (TOP VIEW)", enabling drop-in replacement across temperature grades without PCB modification.
What is the maximum capacitive load the TLC4502QDG4 can drive while remaining stable?
The TLC4502QDG4 is characterized for stable operation with up to 1000 pF capacitive load, as confirmed in the datasheet's "Stable Driving 1000 pF Capacitive Loads" feature list and Figure 28 (Phase Margin vs Load Capacitance). Stability is maintained without external compensation across the full –40°C to 125°C temperature range and 4 V to 6 V supply voltage.
How does the TLC4502QDG4 perform in terms of power supply rejection ratio (PSRR)?
The TLC4502QDG4 delivers ≥90 dB PSRR (kSVR) from 4 V to 6 V supply variation at 25°C, and maintains ≥90 dB across its full –40°C to 125°C operating range. This high PSRR ensures minimal output voltage perturbation due to supply ripple - critical in automotive environments where battery and alternator noise can exceed 100 mVpp.
TLC4502QDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
TLC4502QDG4 FAQ
1.How can I place an order for TLC4502QDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC4502QDG4 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 TLC4502QDG4 reliable?
The price and inventory of TLC4502QDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC4502QDG4 is usually 5 days.
3.What payment methods are accepted for TLC4502QDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC4502QDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC4502QDG4?
TLC4502QDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC4502QDG4 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 TLC4502QDG4?
For technical support, including TLC4502QDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC4502QDG4 requirements.
6.How does Aetrix verify that TLC4502QDG4 is sourced from the original manufacturer or authorized distributors?
All TLC4502QDG4 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 TLC4502QDG4 meets industry standards.
7.What is the process for return or replacement of TLC4502QDG4?
All TLC4502QDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC4502QDG4, 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 TLC4502QDG4 part is unused and in its original packaging.
Return procedure for TLC4502QDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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