Texas Instruments TLC4502AMDG4

Overview

TLC4502AMDG4 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, 4.7 MHz gain-bandwidth product, and ±50 mA output drive-enabling use in precision data acquisition and industrial sensor interfaces.

For engineers reviewing the TLC4502AMDG4 datasheet, TLC4502AMDG4 pinout, TLC4502AMDG4 application, or TLC4502AMDG4 equivalent, key selection criteria include its self-calibration capability, –55°C to 125°C extended temperature operation, rail-to-rail output swing, stability with 1000 pF capacitive loads, and compatibility with low-noise, low-power precision analog front-ends.

Technical Context

The TLC4502AMDG4 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 high-precision op-amp. Its architecture eliminates chopper noise and laser trimming while maintaining CMOS input stage benefits.

It operates from 4 V to 6 V supply, supports rail-to-rail output swing (within 100 mV of rails at ±50 mA), delivers 2.5 V/µs slew rate, and maintains 74° phase margin driving 100 pF loads-making it suitable for unity-gain stable, high-fidelity buffering and amplification in harsh environments.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), surface-mount, 150 mil width, JEDEC MS-012AC compliant. Pin 1 identifier notch located at top-left corner when viewed from top with marking side up.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op-amp applications.

Compared with OPA2189IDR and ADA4522-2ARMZ, the TLC4502AMDG4 uniquely combines military-grade temperature range, self-calibration with post-calibration silence, and robust 1000 pF capacitive load drive-making it optimal for high-reliability embedded systems where long-term offset stability and EMI immunity are critical.

Availability

TLC4502AMDG4 is available at Aetrix Electronics and suitable for precision data acquisition systems, industrial process controllers, and automotive battery monitoring units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC4502AMDG4 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The TLC450x family was engineered specifically for high-accuracy, single-supply analog signal conditioning in mission-critical environments-including aerospace, defense, and automotive applications-where traditional chopper or laser-trimmed op-amps introduce noise, power, or reliability limitations.

FAQ

What is the self-calibration mechanism used in the TLC4502AMDG4?

The TLC4502AMDG4 uses integrated digital self-calibration circuitry that samples input offset voltage during power-up, stores the correction value in an on-chip successive approximation register (SAR), and then disconnects the calibration block from the signal path. This occurs within 300 ms and leaves only the precision analog core active-ensuring no added noise or power consumption during normal operation. The TLC4502AMDG4 does not require external calibration components or user intervention.

Does the TLC4502AMDG4 support single-supply operation?

Yes, the TLC4502AMDG4 supports true single-supply operation from 4 V to 6 V with rail-to-rail output swing. Its input common-mode range extends from VDD– (GND) to VDD+ – 2.3 V, and output swings within 100 mV of both rails at ±50 mA. This enables direct interfacing with 3.3 V or 5 V microcontrollers and ADCs without level-shifting circuitry. The TLC4502AMDG4 is fully specified for single-supply use across its –55°C to 125°C temperature range.

What is the maximum capacitive load the TLC4502AMDG4 can drive while remaining stable?

The TLC4502AMDG4 is unity-gain stable driving up to 1000 pF capacitive loads, as confirmed in the datasheet's "Stable Driving 1000 pF Capacitive Loads" specification and Figure 28 (Phase Margin vs Load Capacitance). This eliminates the need for series isolation resistors in ADC driver, anti-aliasing filter, or cable-driving applications. For loads exceeding 1000 pF, external compensation or a buffer stage is recommended. The TLC4502AMDG4 maintains ≥74° phase margin at 100 pF and remains stable down to 0° phase margin only beyond 3000 pF.

How does the TLC4502AMDG4 differ from the standard TLC4502CD variant?

The TLC4502AMDG4 differs from the TLC4502CD in three key ways: (1) extended temperature range (–55°C to 125°C vs 0°C to 70°C), (2) enhanced screening per MIL-PRF-38535 Class K for high-reliability applications, and (3) D-package packaging with green (lead-free) finish and tape-and-reel delivery. The TLC4502AMDG4 retains identical electrical specifications-including 40 µV max calibrated offset, 4.7 MHz GBW, and self-calibration timing-but is qualified for military, aerospace, and under-hood automotive use where the TLC4502CD is not.

Is the TLC4502AMDG4 pin-compatible with other devices in the TLC450x family?

Yes, the TLC4502AMDG4 is pin-compatible with all SOIC-8 variants in the TLC450x family, including TLC4502CD, TLC4502ID, TLC4502QD, and TLC4502MD. All share identical pinout (IN–/IN+/OUT/GND/IN+/IN–/OUT/VDD), same D-package mechanical dimensions, and compatible footprint. This allows drop-in replacement across temperature grades without PCB redesign. However, users must verify that the selected variant meets the target application's temperature, calibration, and qualification requirements-e.g., TLC4502AMDG4 provides M-temp screening and self-calibration, while TLC4502CD does not.