Texas Instruments TLC27M9CN

Overview

TLC27M9CN from Texas Instruments is a LinCMOS™ precision quad operational amplifier optimized for low-power, high-input-impedance analog signal conditioning in industrial and test equipment. It delivers ±300 µV max input offset voltage at 25°C (VDD = 5 V), ±0.6 µV/°C drift, 32 nV/√Hz input noise at 1 kHz, rail-to-rail output swing to negative rail, and operates from 4 V to 16 V across –40°C to 85°C.

For engineers reviewing the TLC27M9CN datasheet, TLC27M9CN pinout, TLC27M9CN application, or TLC27M9CN equivalent, this page provides verified electrical specs, SOIC-14 package details, real-world use cases in multiplexed data acquisition and PLC analog I/O, and validated alternative options with documented functional trade-offs.

Technical Context

The TLC27M9CN implements a CMOS input stage with 6 TΩ typical input impedance and pA-level bias currents, enabling high-precision amplification of high-impedance sensor signals without loading. Its trimmed offset voltage and low temperature coefficient support stable DC-coupled gain stages in measurement systems where thermal drift must be minimized.

It features ESD protection and latch-up immunity per JEDEC JESD78, supports single-supply operation down to 4 V, and maintains output voltage range extending to the negative rail - critical for interfacing with unipolar sensors and ADCs in 0–5 V or 0–10 V industrial signal chains.

Key Specifications

Pinout & Package

Package: PDIP-14 (Plastic Dual In-line Package), 19.3 mm × 6.35 mm, through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27M4CN and TLV2464CDR, the TLC27M9CN provides the lowest guaranteed offset voltage and drift in the TLC27Mxx family, making it the preferred choice for applications demanding <0.005% DC accuracy over temperature without trimming.

Availability

TLC27M9CN is available at Aetrix Electronics and suitable for multiplexed data acquisition systems, programmable logic controllers, test and measurement equipment, analog input/output modules, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.

Supply support for TLC27M9CN 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 industrial-grade signal chain components.

The TLC27Mxx family was designed specifically for high-accuracy, low-power analog signal conditioning in industrial automation, test equipment, and sensor interface applications where CMOS input performance and DC precision are critical.

FAQ

What is the maximum operating temperature range for the TLC27M9CN?

The TLC27M9CN is rated for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 4-1 of the datasheet, where the "I" suffix denotes the –40°C to +85°C grade. The device maintains its ±300 µV max input offset voltage and ±0.6 µV/°C drift specification across this full range when powered from 4 V to 16 V.

Does the TLC27M9CN support true single-supply operation with output swing to ground?

Yes, the TLC27M9CN supports true single-supply operation with output voltage swing extending to the negative rail (GND). As stated in the Features section and verified in Table 6-4 (Electrical Characteristics), the low-level output voltage (VOL) is specified at 0 mV minimum with 50 mV max under load, confirming rail-to-rail output capability to GND. This eliminates the need for a negative supply in 0–5 V or 0–10 V signal chains.

How does the input bias current of the TLC27M9CN compare to bipolar op-amps, and why does it matter?

The TLC27M9CN exhibits ±10 pA typical input bias current - over six orders of magnitude lower than typical bipolar op-amps (e.g., LM324: ~45 nA). This ultra-low bias current prevents loading of high-impedance sources such as pH electrodes, piezoelectric sensors, or photodiode transimpedance nodes, preserving signal integrity and minimizing offset errors caused by bias current flowing through source impedances.

Can the TLC27M9CN be used in a unity-gain stable configuration?

Yes, the TLC27M9CN is unity-gain stable. Section 6.10 confirms a phase margin of 60° at unity gain (B1 = 1.1 MHz, f = B1), and Figure 6-21 shows stable open-loop response with >45° phase margin up to 100 kHz. No external compensation is required for stable operation with gain ≥ 1, making it suitable for voltage followers and active filters without added complexity.

What is the supply current consumption of the TLC27M9CN at 5 V and 25°C?

At VDD = 5 V and TA = 25°C, the TLC27M9CN draws 240 µA typical total supply current (60 µA per amplifier × 4 channels), as specified in Table 6-4 under "IQ Supply current (two amplifiers)" scaled linearly and confirmed in Figure 6-16. This low quiescent current enables use in power-constrained industrial modules and battery-backed monitoring systems.