Texas Instruments TLC4501ID

Overview

TLC4501ID from Texas Instruments is a self-calibrating precision CMOS rail-to-rail output operational amplifier designed for single-supply, high-accuracy signal conditioning. It achieves 40 µV maximum 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 portable digital scales and industrial sensor front-ends where long-term DC stability is critical.

For engineers reviewing the TLC4501ID datasheet, TLC4501ID pinout, TLC4501ID application, or TLC4501ID equivalent, key selection considerations include its 300 ms self-calibration time, –40°C to 125°C operating range, rail-to-rail output swing with 1000 pF capacitive load stability, and absence of chopper noise-making it suitable for precision analog acquisition in automotive and harsh-environment systems.

Technical Context

The TLC4501ID 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 to operate as a standard op amp. Its CMOS input stage delivers ultra-low input bias current (1 pA typical) and high input impedance (>10¹² Ω), while the rail-to-rail output stage supports full-swing operation from VDD–/GND to VDD+ across 4 V to 6 V supply.

It features stable unity-gain operation driving up to 1000 pF loads, 74° phase margin at 100 kHz, and robust common-mode rejection (85 dB min over temperature). The device is characterized for extended temperature operation and qualified for Q-Temp automotive applications per TI's high-reliability standards.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 150 mil width, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA333AIDR and LTC2050CS8#PBF, the TLC4501ID offers unique trade-offs: it delivers calibrated precision without chopper noise or auto-zero switching artifacts, supports robust capacitive loading and high output current, and operates across the widest automotive temperature range-but with higher drift than zero-drift alternatives.

Availability

TLC4501ID is available at Aetrix Electronics and suitable for portable digital scales, automotive cabin sensors, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC4501ID 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 with emphasis on reliability, longevity, and automotive qualification.

The TLC4501ID belongs to TI's Self-Cal™ precision op-amp family, engineered specifically for applications demanding guaranteed DC accuracy without external calibration-targeting automotive, industrial, and medical systems where offset drift and long-term stability are mission-critical.

FAQ

What is the self-calibration mechanism used in the TLC4501ID?

The TLC4501ID uses integrated digital self-calibration circuitry that measures 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 results in ≤40 µV maximum offset. The TLC4501ID does not require external components or host intervention to perform this function.

Does the TLC4501ID require external capacitors for stability?

Yes-the TLC4501ID requires a minimum 100 nF ceramic bypass capacitor between VDD+ and VDD–/GND, placed as close as possible to the pins. This is essential for maintaining phase margin and preventing oscillation, especially when driving capacitive loads up to 1000 pF. The TLC4501ID datasheet specifies this requirement for all operating conditions.

Can the TLC4501ID operate from a single 3.3 V supply?

No-the TLC4501ID has a specified minimum supply voltage of 4 V per the recommended operating conditions. Operation below 4 V is not characterized or guaranteed; attempting 3.3 V may result in degraded offset performance, reduced output swing, or failure to complete self-calibration. The TLC4501ID is designed for 4 V to 6 V single-supply or ±2.5 V dual-supply operation.

How does the TLC4501ID handle input voltages beyond the supply rails?

The TLC4501ID absolute maximum input voltage is –0.3 V to 7 V (with respect to VDD–/GND). Inputs exceeding VDD+ by more than 0.3 V or falling below VDD–/GND by more than 0.3 V risk damaging the ESD protection diodes. For overvoltage-tolerant designs, external clamping or series resistance is required-TLC4501ID does not include rail-to-rail input stage or built-in overvoltage protection.

Is the TLC4501ID pin-compatible with other devices in the TLC450x family?

Yes-the TLC4501ID shares the same SOIC-8 (D package) pinout with TLC4501CD, TLC4501AID, and TLC4501ACD. All variants use identical pin assignments: Pin 1 (NC), Pin 2 (1IN–), Pin 3 (1IN+), Pin 4 (VDD–/GND), Pin 5 (NC), Pin 6 (VDD+), Pin 7 (1OUT), Pin 8 (NC). However, electrical specifications (e.g., offset voltage grade, temperature range) differ between suffixes.