Texas Instruments TLC27L2CDG4

Overview

TLC27L2CDG4 from Texas Instruments is a precision dual CMOS operational amplifier optimized for low-power, single-supply sensor signal conditioning. It delivers 10 mV max input offset voltage (25°C), ultra-low 34 µA typical supply current (VDD = 5 V), and rail-to-rail output swing down to the negative rail-enabling accurate amplification in battery-powered field transmitters and smoke detectors.

For engineers reviewing the TLC27L2CDG4 datasheet, TLC27L2CDG4 pinout, TLC27L2CDG4 application, or TLC27L2CDG4 equivalent, key selection criteria include its 0°C to 70°C operating range, SOIC-8 package, LinCMOS™ input stage with 10¹² Ω impedance, and verified performance in low-voltage analog front-ends requiring long-term offset stability and ESD robustness.

Technical Context

The TLC27L2CDG4 uses Texas Instruments' silicon-gate LinCMOS™ process, delivering superior input offset voltage stability (<0.1 µV/month drift) and latch-up immunity versus metal-gate alternatives. Its dual-channel architecture supports independent signal paths with matched gain and common-mode rejection.

It operates from 3 V to 16 V over 0°C–70°C, supports single-supply operation with common-mode input extending 0.2 V below ground, and features internal ESD protection rated to 2000 V (MIL-STD-883C, Method 3015.2).

Key Specifications

Pinout & Package

Package: SOIC-8 (D suffix), 3.9 mm × 4.9 mm body, 1.27 mm pitch, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L2IDR, the TLC27L2CDG4 offers tighter temperature-limited qualification (0°C–70°C) and tube packaging, while TLV2462CDR trades 16× higher supply current for improved dynamic performance-making TLC27L2CDG4 optimal for static, low-drift, energy-constrained sensing.

Availability

TLC27L2CDG4 is available at Aetrix Electronics and suitable for smoke detector manufacturing, industrial pressure transmitter design, and remote battery-powered sensor node development requiring stable component supply across multi-year production cycles.

Supply support for TLC27L2CDG4 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 expertise in precision op-amps and industrial-grade signal chains.

The TLC27Lx family was designed specifically for low-power, high-accuracy analog signal conditioning in field instrumentation-including transmitters, detectors, and remote sensors-where long-term offset stability and single-supply operation are mandatory.

FAQ

What is the maximum operating temperature range for the TLC27L2CDG4?

The TLC27L2CDG4 is characterized for operation from 0°C to 70°C. This C-suffix grade is intended for commercial and industrial indoor applications-not extended-temperature environments. Exceeding 70°C may degrade input offset voltage, bias current, and phase margin beyond datasheet limits. For −40°C to +85°C operation, consider the TLC27L2IDR variant instead of the TLC27L2CDG4.

Does the TLC27L2CDG4 support true rail-to-rail input?

The TLC27L2CDG4 supports rail-to-rail output swing but does not provide full rail-to-rail input. Its common-mode input voltage range extends to −0.2 V (below GND) and up to 3.5 V (at VDD = 5 V), meaning it accepts inputs slightly below ground but not up to VDD. This makes it ideal for single-supply sensor interfaces where the negative rail is GND, but not for applications requiring input signals near VDD without attenuation.

Can the TLC27L2CDG4 drive capacitive loads directly?

The TLC27L2CDG4 exhibits reduced phase margin with capacitive loads >20 pF, risking instability. At 25°C and VDD = 5 V, phase margin drops to 34° with 20 pF; it falls further at temperature extremes. For reliable operation with >100 pF loads (e.g., ADC inputs or cables), add an isolation resistor (≥100 Ω) between TLC27L2CDG4 output and capacitance, or use a unity-gain buffer stage. Do not assume inherent capacitive-load drive capability for the TLC27L2CDG4.

Is the TLC27L2CDG4 pin-compatible with other TLC27Lx variants?

Yes-the TLC27L2CDG4 shares identical SOIC-8 pinout and footprint with all TLC27Lx dual op-amps (e.g., TLC27L2A, TLC27L2B, TLC27L7, TLC27L2I). Pin functions (1IN+, 1IN−, 1OUT, GND, 2IN+, 2IN−, VDD, 2OUT) are consistent across the family. However, electrical differences (offset voltage, temperature range, supply current) mean direct substitution requires validation of system-level accuracy and thermal performance for the specific TLC27L2CDG4 use case.

What is the typical input bias current of the TLC27L2CDG4 at 25°C?

The typical input bias current of the TLC27L2CDG4 is 0.6 pA at 25°C, with a maximum of 60 pA under specified conditions. This ultra-low value stems from its LinCMOS™ input structure and enables accurate amplification of high-impedance sources such as thermistors, photodiodes, and electrochemical sensors without significant current-induced offset errors. At 70°C, bias current rises to ≤600 pA-still exceptionally low compared to bipolar-input op-amps.