Texas Instruments TL026CP

Overview

TL026CP from Texas Instruments is a monolithic two-stage differential high-frequency amplifier with AGC, designed for RF/IF signal conditioning in analog communication systems. It delivers 38 dB typical peak gain, 50 MHz –3 dB bandwidth, and 50 dB typical AGC range, operating from ±3 V to ±8 V supplies across 0°C to 70°C. Its emitter-follower outputs drive capacitive loads in TV IF, radio receivers, and magnetic storage AGC circuits.

For engineers reviewing the TL026CP datasheet, TL026CP pinout, TL026CP application, or TL026CP equivalent, key selection criteria include differential gain control linearity (±180 mV around Vref), low output common-mode sensitivity to AGC voltage, input/output impedance independence from AGC voltage, and guaranteed 50 MHz bandwidth at ±6 V supply with 2 kΩ load.

Technical Context

The TL026CP implements a current-source-biased two-stage architecture with internal feedback for wide bandwidth and low phase distortion. Its variable gain is achieved via signal summation at the AGC node, enabling large dynamic-range attenuation without external compensation components.

All stages use current-source biasing to achieve high common-mode and supply-voltage rejection ratios (CMRR ≥ 50 dB at 100 kHz; kSVR ≥ 50 dB). The REF OUT pin provides a stable 1.3–1.5 V reference for AGC bias generation, ensuring thermal tracking and device-to-device consistency in closed-loop AGC systems.

Key Specifications

Pinout & Package

TL026CP uses an 8-pin plastic dual in-line package (PDIP), 0.300-inch width, with standard through-hole mounting and JEDEC MS-001 compliant footprint. Pin 1 identifier is located at top-left corner when viewed from top with notch or dot oriented upward.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential high-frequency amplifier with AGC applications.

Compared with NE592N and uA733CP, the TL026CP provides superior bandwidth and integrated reference voltage-reducing external component count and improving AGC loop stability-while maintaining PDIP-8 compatibility for drop-in upgrades in legacy analog signal chains.

Availability

TL026CP is available at Aetrix Electronics and suitable for TV IF amplification, radio receiver AGC circuits, and magnetic storage read channel designs requiring stable component supply across extended production lifecycles.

Supply support for TL026CP 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 U.S.-based semiconductor company founded in 1930, specializing in analog ICs, embedded processors, and high-reliability components for industrial, automotive, and communications markets.

The TL026CP belongs to TI's legacy linear amplifier product line, engineered specifically for analog signal conditioning in broadcast, data storage, and instrumentation systems requiring wideband differential gain control.

FAQ

What is the maximum recommended supply voltage for TL026CP?

The absolute maximum supply voltage for TL026CP is ±8 V, but the recommended operating range is ±3 V to ±6 V. Operating at ±6 V ensures optimal bandwidth (50 MHz), gain stability, and thermal performance. Exceeding ±6 V increases power dissipation and may reduce long-term reliability without providing meaningful performance gains.

Does TL026CP require external compensation components?

No, TL026CP does not require external compensation components. Its internal feedback architecture is fully compensated for unity-gain stability across its specified operating conditions. This eliminates the need for external capacitors or resistors in the gain-setting path, simplifying PCB layout and reducing bill-of-materials cost in AGC loop implementations.

How is the AGC control voltage applied to TL026CP?

The AGC control voltage is applied differentially between the AGC pin and the REF OUT pin. The effective control voltage is (VAGC – Vref), where Vref is the 1.3–1.5 V output from REF OUT. A ±180 mV variation around Vref produces the full 50 dB gain range. External circuitry must generate VAGC as the sum of an AC signal and a DC offset derived from Vref to preserve thermal tracking.

Can TL026CP drive 50 Ω transmission lines directly?

TL026CP cannot drive 50 Ω lines directly at full output swing due to its 20 Ω output resistance and 3 VPP minimum swing into 2 kΩ. To interface with 50 Ω systems, use external 50 Ω series termination at the output or a broadband RF transformer. Figure 6 in the datasheet shows a validated 50 Ω-coupled application using emitter-follower buffering and proper grounding.

What is the purpose of the REF OUT pin on TL026CP?

The REF OUT pin on TL026CP provides a stable 1.3–1.5 V DC reference voltage used to bias the AGC input. It ensures thermal tracking between the internal AGC control circuitry and external feedback components. All AGC voltage generation circuits must reference this pin-not ground-to maintain consistent gain control across temperature and device variation.