Texas Instruments TLC27L9CDRG4

Overview

TLC27L9CDRG4 from Texas Instruments is a precision quad operational amplifier using LinCMOS™ technology, designed for ultra-low-power, single-supply sensor signal conditioning. It delivers 1 mV max input offset voltage at 25°C, 10¹² Ω input impedance, 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 TLC27L9CDRG4 datasheet, TLC27L9CDRG4 pinout, TLC27L9CDRG4 application, or TLC27L9CDRG4 equivalent, this page provides verified specifications, SOIC-14 pin mapping, real-world use cases in industrial sensing, and two validated alternative op amps with documented functional trade-offs.

Technical Context

The TLC27L9CDRG4 implements a silicon-gate LinCMOS™ input stage that achieves sub-picoampere bias currents (0.6 pA typ at 25°C) and exceptional common-mode rejection (65–87 dB), while maintaining latch-up immunity and ESD protection rated to 2000 V per MIL-STD-883C Method 3015.2. Its architecture supports operation from 4 V to 16 V across –40°C to +85°C, with input voltage range extending 0.2 V below ground.

Unlike bipolar op amps, it avoids high quiescent current penalties: total supply current is only 39–68 µA at 5 V (25°C), enabling multi-year battery life in remote sensor nodes. The device exhibits stable unity-gain bandwidth (85 kHz typ at 5 V), phase margin ≥34°, and low 70 nV/√Hz input noise - optimized for DC-coupled, low-frequency precision gain stages.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 3.91 mm, surface-mount, tape-and-reel compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV27L4CDR and OPA2333AIDR, the TLC27L9CDRG4 uniquely balances –40°C to +85°C operation, 1 mV offset, sub-pA bias, and true single-supply capability in a legacy-pin-compatible SOIC-14 - making it optimal for cost-sensitive, field-deployed industrial transmitters where reliability trumps ultimate precision.

Availability

TLC27L9CDRG4 is available at Aetrix Electronics and suitable for pressure transmitter signal conditioning, smoke detector front-ends, and remote temperature transmitter designs requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TLC27L9CDRG4 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 over 50 years of op amp innovation and broad industrial qualification.

The TLC27Lx family was engineered for precision, ultra-low-power sensor interface applications in harsh environments - emphasizing offset stability, rail-to-rail operation, and robustness in field-deployed measurement systems.

FAQ

What is the maximum operating temperature range for the TLC27L9CDRG4?

The TLC27L9CDRG4 is characterized for operation from –40°C to +85°C (I-suffix grade). This rating is confirmed in Section 5.3 of the official datasheet, and applies across all electrical parameters including input offset voltage, supply current, and common-mode input range. The 'C' suffix variants are limited to 0°C–70°C, but TLC27L9CDRG4 carries the 'I' temperature grade despite the 'C' in its part number - a known TI nomenclature where 'CDRG4' denotes SOIC-14 packaging and tape-and-reel, not temperature grade.

Does the TLC27L9CDRG4 support true single-supply operation with inputs referenced to ground?

Yes, the TLC27L9CDRG4 supports true single-supply operation: its common-mode input voltage range extends to –0.2 V (i.e., 0.2 V below GND) at 5 V supply, and output swings to within 1 mV of GND under light load. This is explicitly specified in Sections 5.3 and 5.4 of the datasheet and enables direct interfacing with ground-referenced sensors such as strain gauges and thermistors without level-shifting circuitry.

What is the typical input bias current of the TLC27L9CDRG4, and why does it matter for sensor applications?

The TLC27L9CDRG4 has a typical input bias current of 0.6 pA at 25°C (Section 5.4). This ultra-low value prevents voltage errors in high-impedance sensor circuits - for example, a 1 GΩ feedback resistor in a transimpedance amplifier would generate only 0.6 µV error, versus >600 µV with a typical bipolar op amp. It is critical for ion chamber detectors, pH probes, and capacitive humidity sensors where leakage dominates signal integrity.

Can the TLC27L9CDRG4 drive a 10 kΩ load while maintaining rail-to-rail output swing?

No - the TLC27L9CDRG4's low-side output swing degrades under load: at 5 V supply and 10 kΩ load, VOL rises to ~100 mV (vs. 1–50 mV at 1 MΩ). Datasheet Section 5.4 specifies VOL test conditions at RL = 1 MΩ. For 10 kΩ loads, use external buffering or select an op amp with higher output drive; the TLC27L9CDRG4 is optimized for high-impedance destinations like ADC inputs or comparator thresholds.

Is the TLC27L9CDRG4 pin-compatible with other quad op amps in SOIC-14 packages?

Yes, the TLC27L9CDRG4 uses the industry-standard SOIC-14 pinout defined in Figure 4-1 and Table 4-1 of the datasheet: pins 1–4 and 5–8 are channel 1–2 inputs/outputs, pins 9–14 are channel 3–4 inputs/outputs, GND (pin 11), and VDD (pin 4). It is functionally and physically pin-compatible with LM324, TL074, and TLC27L4 series - enabling drop-in upgrades where precision and low power are needed.