Texas Instruments OPA4820IPWR

Overview

OPA4820IPWR from Texas Instruments is a quad, unity-gain stable, low-noise voltage-feedback operational amplifier optimized for high-speed, precision analog signal conditioning. It delivers 220MHz bandwidth at G = +2, ±85mA output current, 2.5nV/√Hz input voltage noise, and operates from ±2V to ±6.3V dual or +4V to +12.6V single supply - enabling use in ADC preamplifiers, video line drivers, and portable test equipment.

For engineers reviewing the OPA4820IPWR datasheet, OPA4820IPWR pinout, OPA4820IPWR application, or OPA4820IPWR equivalent, key selection criteria include its 0.01%/0.03° dG/dP for composite video, >600MHz unity-gain bandwidth, ±0.8mV max input offset voltage at 25°C, rail-compatible output swing on +5V, and TSSOP-14 package compatibility with industry-standard SO-14 layouts.

Technical Context

The OPA4820IPWR employs a voltage-feedback architecture with unity-gain stability and <1dB peaking at G = +1. Its internal compensation enables wideband operation while maintaining DC precision via low input offset voltage (±0.8mV max) and current (±500nA max), making it suitable for pulse amplification and baseband signal chains where both speed and accuracy are required.

It supports flexible biasing: dual-supply operation (±2V to ±6.3V) and single-supply operation (+4V to +12.6V), with input common-mode range extending to ±3.6V (±5V supply) and output swing of ±3.4V into 100Ω. The device achieves 240V/µs slew rate and 22ns settling time to 0.02% at G = +2, supporting fast transient response in active filters and CCD imaging channel amplifiers.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4mm × 5mm body, 0.65mm pitch, thin-profile surface-mount with exposed thermal pad (not electrically connected). Pin 1 marked by dot; pin numbering follows standard IC convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Compared with OPA4354IPWR and OPA4650IPWR, the OPA4820IPWR uniquely balances unity-gain stability, broadcast-grade video linearity, and low-noise precision in a single quad package - making it irreplaceable in cost-sensitive, high-fidelity analog signal paths where both speed and DC accuracy are simultaneously critical.

Availability

OPA4820IPWR is available at Aetrix Electronics and suitable for ADC preamplifiers, composite video line drivers, active filters, and CCD imaging channel amplifiers requiring stable component supply across industrial, medical, and broadcast design cycles.

Supply support for OPA4820IPWR 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 90 years of innovation in precision amplifiers, data converters, and power management ICs.

The OPA4820IPWR belongs to TI's high-speed precision op amp product line, engineered specifically for applications demanding simultaneous wide bandwidth, low noise, and DC accuracy - such as portable test equipment, medical imaging front-ends, and broadcast video infrastructure.

FAQ

What supply voltage ranges does the OPA4820IPWR support?

The OPA4820IPWR supports dual supplies from ±2V to ±6.3V and single supplies from +4V to +12.6V. At ±5V, it delivers 220MHz bandwidth and ±85mA output current; on +5V, it maintains >2V_PP output swing with 210MHz bandwidth. Absolute maximum ratings are ±6.5V and +13V respectively - ensuring robust operation across industrial and portable designs.

Is the OPA4820IPWR unity-gain stable, and what is its small-signal bandwidth at G = +1?

Yes, the OPA4820IPWR is unity-gain stable with <1dB peaking at G = +1. Its small-signal bandwidth is 650MHz (typical) at G = +1 under ±5V supply, RF = 25Ω, and VO = 0.1V_PP. This enables direct use in buffer, cable driver, and active filter configurations without external compensation components - reducing BOM count and layout complexity.

What is the input voltage noise specification for the OPA4820IPWR, and how does it impact ADC preamplifier performance?

The OPA4820IPWR has an input voltage noise of 2.5nV/√Hz (max at f > 100kHz). In ADC preamplifier applications, this contributes minimally to total system noise floor - for example, with a 10MHz bandwidth, integrated noise is ~80nV RMS, preserving >16-bit ENOB when driving 16-bit SAR ADCs with ≥80dB SNR. Its low 1.7pA/√Hz current noise further reduces Johnson noise in high-impedance sensor interfaces.

Does the OPA4820IPWR meet broadcast video specifications for differential gain and phase?

Yes, the OPA4820IPWR delivers 0.003% differential gain (dG) and 0.06° differential phase (dP) at G = +2, NTSC, VO = 1.4V_PP, RL = 150Ω - exceeding EIA-770.1 and ITU-R BT.470 requirements for consumer and professional video line drivers. This performance is maintained across temperature (−40°C to +85°C) and supply variations, eliminating need for post-amplifier calibration.

What package type and thermal characteristics apply to the OPA4820IPWR?

The OPA4820IPWR uses the TSSOP-14 package (PW designation), with 4.4mm × 5mm body, 0.65mm pitch, and junction-to-ambient thermal resistance (θ_JA) of 110°C/W. It is rated for −45°C to +85°C operating temperature. The exposed pad is non-functional (no electrical connection), and recommended PCB layout includes thermal vias to inner ground planes for optimal power dissipation in high-output-current applications.