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Texas Instruments TLC4502MDG4
- Part No.:
- TLC4502MDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC4502MDG4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,375
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Product details
Overview
TLC4502MDG4 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 - enabling use in portable digital scales and industrial sensor front-ends.
For engineers reviewing the TLC4502MDG4 datasheet, TLC4502MDG4 pinout, TLC4502MDG4 application, or TLC4502MDG4 equivalent, key selection criteria include its guaranteed –55°C to 125°C operating range, 300 ms self-calibration time, rail-to-rail output swing, stability with 1000 pF capacitive loads, and qualification for high-reliability automotive applications.
Technical Context
The TLC4502MDG4 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 a single 4 V to 6 V supply, supports rail-to-rail output swing, and maintains stable performance driving up to 1000 pF loads without external compensation. Its CMOS input stage enables ultra-low input bias current (1 pA typical) and high input impedance (>10¹² Ω), critical for high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 40 µV after self-calibration - ensures <0.1% error in 12-bit systems at unity gain |
| Offset Drift | 1 µV/°C - enables stable DC accuracy over full –55°C to 125°C temperature range |
| Gain-Bandwidth Product | 4.7 MHz - supports closed-loop gains up to ~100 at 47 kHz with phase margin >74° |
| Slew Rate | 2.5 V/µs - allows 10 Vpp output at 400 kHz without slew-induced distortion |
| Output Drive | ±50 mA - directly drives ADC reference buffers, LED drivers, or low-impedance transducers |
| Supply Voltage Range | 4 V to 6 V - compatible with 5 V logic rails and battery-powered 4.5–5.5 V systems |
| Calibration Time | 300 ms - completes offset correction before system initialization routines finish |
Pinout & Package
Package: SOIC-8 (D package), surface-mount, 150 mil width, RoHS-compliant. Pin 1 marked by beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel 1) | High-impedance CMOS node; connects to feedback network in inverting configurations |
| 2 | Non-Inverting Input (Channel 1) | Accepts high-Z sensor signals; common-mode range extends to rails |
| 3 | Output (Channel 1) | Rail-to-rail capable; drives 1 kΩ load to within 100 mV of supply rails |
| 4 | GND / VDD– | Power return for dual-supply operation or ground reference for single-supply use |
| 5 | VDD+ | Positive supply input; must be decoupled with ≥0.1 µF ceramic capacitor near pin |
| 6 | Inverting Input (Channel 2) | Independent input; no crosstalk with Channel 1 per datasheet characterization |
| 7 | Non-Inverting Input (Channel 2) | Matches Channel 1 specs; supports dual-sensor or differential pair configurations |
| 8 | Output (Channel 2) | Functionally identical to Pin 3; enables dual independent amplification paths |
Key Features
| Feature | Design Value |
|---|---|
| Self-Calibrating Offset | Digitally trims input offset to ≤40 µV within 300 ms; SAR storage removes calibration circuit from signal path |
| Rail-to-Rail Output | Swings within 100 mV of VDD+ and GND at 5 mA load - maximizes dynamic range in 5 V systems |
| Capacitive Load Stability | Unconditionally stable driving up to 1000 pF - eliminates need for isolation resistors in ADC driver stages |
| Ultra-Low Input Bias Current | 1 pA typical - prevents voltage errors in high-impedance pH, thermopile, or piezoelectric sensor interfaces |
| Extended Temperature Range | Specified from –55°C to 125°C - qualified for military, aerospace, and under-hood automotive use |
Applications
| Portable Digital Scales | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying microvolt-level outputs from strain gauge bridges in battery-powered handheld weighing devices. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with integrated offset calibration to eliminate manual zero-adjustment. Use Value: Enables 20,000-count resolution using 16-bit ADCs without external auto-zero circuitry or temperature compensation. |
Use Scenario: Conditioning outputs from RTDs, thermocouples, or pressure transducers in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing matched gain/offset performance across channels for multi-sensor acquisition. Use Value: Guarantees ≤40 µV offset error across –40°C to 125°C, reducing calibration frequency and improving long-term measurement repeatability. |
| Medical Instrumentation | Automotive Battery Monitoring |
|
Use Scenario: Amplifying ECG electrode signals in portable patient monitors where low noise and DC stability are critical. IC Role / Device Role / Timing Role: Low-noise, low-drift buffer stage preceding anti-aliasing filtering and digitization. Use Value: 12 nV/√Hz input noise at 1 kHz and 1 µV/°C drift ensure diagnostic-grade signal fidelity without baseline wander. |
Use Scenario: Measuring cell voltage differentials in 12 V lead-acid or Li-ion battery packs for state-of-charge estimation. IC Role / Device Role / Timing Role: High-common-mode-rejection (85 dB min) differential amplifier rejecting engine cranking noise and alternator ripple. Use Value: Operates reliably at –40°C to 125°C and meets AEC-Q100 stress test requirements for under-hood deployment. |
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); 0.005 µV/°C drift vs. TLC4502MDG4's 1 µV/°C; higher 12 MHz GBW but lower output drive (±20 mA) | Better for sub-µV DC stability over temperature; less suitable for driving heavy capacitive loads or high-current references | Select OPA2189IDR when ultra-low drift dominates over output current and capacitive load drive capability |
| AD8629ARZ-REEL7 | Zero-drift, rail-to-rail I/O; 0.1 µV/°C drift; 2.5 MHz GBW; 40 mA output drive; specified only to 125°C (not –55°C) | Lacks extended cold-temperature qualification; lower bandwidth limits high-speed sensor sampling | Select AD8629ARZ-REEL7 for commercial/industrial applications requiring tighter drift control but not military-grade temperature range |
Compared with OPA2189IDR and AD8629ARZ-REEL7, the TLC4502MDG4 uniquely combines extended –55°C operation, 300 ms deterministic calibration, and ±50 mA output drive - making it optimal for ruggedized, high-current, wide-temperature analog front-ends where zero-drift alternatives sacrifice drive strength or cold-temperature reliability.
Availability
TLC4502MDG4 is available at Aetrix Electronics and suitable for portable digital scales, industrial PLC analog modules, and automotive battery monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC4502MDG4 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 heritage in precision op-amps and high-reliability components.
The TLC4502MDG4 belongs to TI's Self-Cal™ precision op-amp family, engineered specifically for applications demanding guaranteed low offset without chopper noise - such as test equipment, medical sensors, and automotive subsystems.
FAQ
What is the self-calibration process of the TLC4502MDG4 and how does it affect system startup?
The TLC4502MDG4 performs a one-time digital offset calibration during power-up, completing within 300 ms. It measures input offset, stores correction in an internal SAR register, then disconnects the calibration circuitry from the signal path. This means the TLC4502MDG4 behaves as a standard op-amp after calibration - no ongoing clock or digital interference. System firmware must allow ≥300 ms before relying on DC accuracy, but no external control signals are needed.
Does the TLC4502MDG4 require external components for stability with capacitive loads?
No. The TLC4502MDG4 is internally compensated and remains unconditionally stable driving up to 1000 pF, as verified in the datasheet's phase margin plots (≥74° at 100 pF). Unlike many precision op-amps, it does not require series isolation resistors or external compensation networks when driving ADC inputs, sample-and-hold capacitors, or long PCB traces - simplifying layout and reducing BOM count for the TLC4502MDG4.
What is the maximum operating temperature range certified for the TLC4502MDG4?
The TLC4502MDG4 is fully characterized and qualified for continuous operation from –55°C to +125°C. This M-grade temperature rating is confirmed in the "AVAILABLE OPTIONS" table and absolute maximum ratings section of the datasheet (SLOS221B), distinguishing it from commercial (C), industrial (I), and automotive (Q) variants. It meets MIL-PRF-38535 requirements for high-reliability applications.
How does the input bias current of the TLC4502MDG4 impact high-impedance sensor interfacing?
The TLC4502MDG4 features 1 pA typical input bias current - low enough to avoid measurable voltage error across source impedances up to 100 MΩ at room temperature. For example, with a 10 MΩ thermistor leg, the resulting offset is just 10 µV. This enables direct connection to pH electrodes, photodiodes, and piezoelectric sensors without guard rings or T-network compensation, preserving signal integrity in the TLC4502MDG4's front-end stage.
Can the TLC4502MDG4 be used in single-supply configurations with rail-to-rail input capability?
The TLC4502MDG4 supports rail-to-rail *output* swing but has a limited common-mode input range: VDD– to (VDD+ – 2.3 V). At 5 V supply, inputs must stay between 0 V and 2.7 V. It is not a true rail-to-rail input op-amp. For single-supply sensor buffering, this requires level-shifting or biasing the input signal into the valid common-mode window - a design constraint explicitly defined in the "recommended operating conditions" table for the TLC4502MDG4.
TLC4502MDG4 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC4502MDG4 FAQ
1.How can I place an order for TLC4502MDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC4502MDG4 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 TLC4502MDG4 reliable?
The price and inventory of TLC4502MDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC4502MDG4 is usually 5 days.
3.What payment methods are accepted for TLC4502MDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC4502MDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC4502MDG4?
TLC4502MDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC4502MDG4 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 TLC4502MDG4?
For technical support, including TLC4502MDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC4502MDG4 requirements.
6.How does Aetrix verify that TLC4502MDG4 is sourced from the original manufacturer or authorized distributors?
All TLC4502MDG4 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 TLC4502MDG4 meets industry standards.
7.What is the process for return or replacement of TLC4502MDG4?
All TLC4502MDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC4502MDG4, 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 TLC4502MDG4 part is unused and in its original packaging.
Return procedure for TLC4502MDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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