Texas Instruments VCA822ID

Overview

VCA822ID from Texas Instruments is a DC-coupled, wideband variable gain amplifier (VGA) with linear-in-V/V gain control, 150-MHz small-signal bandwidth at +10 V/V, 0.1-dB gain flatness to 28 MHz, 1700 V/μs slew rate, and ±160 mA output current. It serves as a high-speed differential-to-single-ended converter in video equalization and pulse amplitude compensation circuits.

For engineers reviewing the VCA822ID datasheet, VCA822ID pinout, VCA822ID application, or VCA822ID equivalent, this page delivers verified electrical specs, SOIC-14 package mapping, functional pin roles, real-world use cases in differential line receivers and active filters, and two confirmed alternative parts with documented technical differences.

Technical Context

The VCA822ID integrates two input buffers and a current-feedback output stage with an internal multiplier core, eliminating need for external buffering. Its gain is set externally via RG and RF resistors, supporting nominal maximum gains from +2 V/V to +100 V/V.

Gain control operates linearly in V/V over VG = –1 V to +1 V, delivering >40 dB of continuous adjustment range. At AVMAX = +10 V/V, it achieves 137 MHz large-signal (5 VPP) bandwidth and maintains ±0.3 dB gain accuracy across 0–1 V control voltage at +25°C.

Key Specifications

Pinout & Package

Package: SOIC-14 (8.65 mm × 3.91 mm), rated for –40°C to +85°C operating temperature.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar variable gain amplifier applications.

Compared with VCA822ID, VCA821ID trades SOIC-14 compatibility and video-grade flatness for higher speed and lower noise, while LMH6503MA/NOPB offers wider bandwidth but demands additional support circuitry and sacrifices DC coupling-making VCA822ID optimal for industrial video, pulse, and differential line applications requiring robust, self-contained analog gain control.

Availability

VCA822ID is available at Aetrix Electronics and suitable for differential line receivers, video equalizers, pulse amplitude compensators, and voltage-tunable active filters requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for VCA822ID 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, embedded processing, and power management technologies, with decades of expertise in high-performance signal chain solutions.

The VCA822ID belongs to TI's wideband variable gain amplifier product line, engineered specifically for DC-coupled, high-fidelity analog signal conditioning in video, test equipment, and communications infrastructure.

FAQ

What is the maximum small-signal bandwidth of the VCA822ID?

The VCA822ID achieves a small-signal bandwidth of 150 MHz when configured for AVMAX = +10 V/V with ±5-V supplies, RF = 1 kΩ, RG = 200 Ω, and RL = 100 Ω at +25°C. This specification is validated in the official SBOS343D datasheet, Table 7.5, under "Small-signal bandwidth (SOIC-14 Package)" test condition. Bandwidth decreases to 118 MHz at AVMAX = +100 V/V and increases slightly to 168 MHz at AVMAX = +2 V/V.

Does the VCA822ID support DC-coupled operation?

Yes, the VCA822ID is explicitly designed as a DC-coupled variable gain amplifier. Its input stage accepts DC and low-frequency signals without blocking capacitors, and its gain control law remains linear from DC through 150 MHz. The datasheet confirms DC coupling in Section 1 ("Features") and Section 3 ("Description"), noting it is "DC-coupled, wideband, linear in V/V" and suitable for baseband applications including pulse amplitude compensation and active filtering.

What package type is used for the VCA822ID?

The VCA822ID uses the SOIC-14 (D) package, measuring 8.65 mm × 3.91 mm, as confirmed in the "Device Information" table on page 2 of the SBOS343D datasheet. This is distinct from the VSSOP-10 (DGS) variant; the "ID" suffix in VCA822ID denotes the SOIC-14 version, consistent with TI's orderable part numbering convention and mechanical packaging documentation.

Can the VCA822ID drive a 75-Ω video load directly?

Yes, the VCA822ID can drive a 75-Ω load directly. With ±5-V supplies, it delivers ±3.7 V output swing into 100 Ω and ±3.5 V into 5 Ω (Section 7.5, "Output voltage swing"). Derating for 75 Ω falls within this range, and Figure 15 in the datasheet demonstrates differential gain/phase performance into video loads. Its ±160 mA output current capability ensures stable operation without external buffers in broadcast and instrumentation video paths.

What is the gain control voltage range for the VCA822ID?

The VCA822ID accepts a gain control voltage (VG) from –1 V to +1 V, providing linear-in-V/V gain adjustment across >40 dB. At AVMAX = +10 V/V, this yields gain from 10 V/V at VG = +1 V down to 0.1 V/V at VG = –1 V. The datasheet specifies this range in Section 3 ("Description") and validates gain linearity and error bands across this full span in Figures 4–6 and Table 7.5 ("Gain deviation" rows).