Analog Devices Inc. ADA4861-3YRZ-RL

Overview

ADA4861-3YRZ-RL from Analog Devices is a high-speed, current-feedback triple operational amplifier in a 14-lead SOIC_N package, delivering 730 MHz −3 dB bandwidth (±5 V), 625–910 V/μs slew rate, and 12 ns settling time to 0.5%. It features independent power-down pins per amplifier, 0.01% differential gain, and 0.02° differential phase-optimized for RGB video driver, ADC buffer, and active filter applications.

For engineers reviewing the ADA4861-3YRZ-RL datasheet, ADA4861-3YRZ-RL pinout, ADA4861-3YRZ-RL application, or ADA4861-3YRZ-RL equivalent, key selection criteria include current-feedback architecture, 14-pin SOIC_N thermal performance (θJA = 90°C/W), single/dual-supply operation (5 V to ±5 V), and verified 100 MHz 0.1 dB flatness under ±5 V supply.

Technical Context

The ADA4861-3YRZ-RL employs a current-feedback topology with transimpedance gain stage, enabling wide bandwidth independent of closed-loop gain. Its −IN terminal presents low impedance (~90 Ω), while +IN offers high input resistance (15 MΩ) and low capacitance (1.5 pF), supporting stable high-frequency operation with minimal phase shift.

Each amplifier integrates an independent power-down pin referenced to −VS, enabling selective shutdown with <3.5 μs turn-off time and 200 ns turn-on time. The device maintains specified performance across −40°C to +105°C and supports both single-supply (5 V) and dual-supply (±5 V) configurations with rail-to-rail output swing into 150 Ω loads.

Key Specifications

Pinout & Package

The ADA4861-3YRZ-RL is housed in a 14-lead SOIC_N package (JEDEC MS-012-AB, 8.75 mm × 4.00 mm, θJA = 90°C/W) with exposed pad not present. Pin functions are validated per Figure 1 of Rev. A datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed triple op amp applications.

Compared with ADA4862-3YRZ-RL, the ADA4861-3YRZ-RL offers design flexibility via external gain-setting resistors but requires additional passive components; versus THS3203D, it delivers integrated triple-channel functionality with lower system-level power and video-specific linearity at the expense of peak bandwidth.

Availability

ADA4861-3YRZ-RL is available at Aetrix Electronics and suitable for consumer video interfaces, professional broadcast equipment, and high-speed data acquisition systems requiring stable component supply, extended temperature operation (−40°C to +105°C), and JEDEC-compliant SOIC_N packaging.

Supply support for ADA4861-3YRZ-RL 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADA4861-3YRZ-RL belongs to Analog Devices' high-speed current-feedback op amp product line, engineered specifically for demanding video, instrumentation, and communications signal-path applications where bandwidth, linearity, and power efficiency are co-optimized.

FAQ

What supply voltage ranges does the ADA4861-3YRZ-RL support?

The ADA4861-3YRZ-RL operates from a single 5 V supply or dual ±5 V supplies, with absolute maximum ratings up to 12.6 V total supply range. Performance specifications-including 730 MHz bandwidth and 0.01% differential gain-are guaranteed across this full operating range, and the device maintains stable operation with proper power supply bypassing (0.1 µF MLCC + 2.2–47 µF bulk capacitor per supply rail).

How does the power-down function work on the ADA4861-3YRZ-RL?

The ADA4861-3YRZ-RL features three independent POWER DOWN pins (Pins 1, 2, 3), each controlling one amplifier. When pulled >−VS +1 V (e.g., >+1 V in 5 V single-supply mode), the associated amplifier enters low-power state (<0.3 mA quiescent current). Turn-off time is 3.5 μs; turn-on is 200 ns. Unused pins must be tied to −VS-not left floating-to prevent erratic behavior.

Can the ADA4861-3YRZ-RL drive 75 Ω video loads directly?

Yes-the ADA4861-3YRZ-RL delivers ±3.65 V output swing into 150 Ω (±5 V) and sustains 100 mA short-circuit current, enabling direct 75 Ω coaxial cable driving with series 75 Ω termination (as shown in Figure 50). This eliminates need for external line drivers in RGB video applications while maintaining 0.01% differential gain and −65 dB crosstalk.

What is the small-signal bandwidth of the ADA4861-3YRZ-RL at G = +2?

At G = +2 and ±5 V supply, the ADA4861-3YRZ-RL achieves 370 MHz −3 dB bandwidth (Table 2) and 100 MHz 0.1 dB flatness-verified under RL = 150 Ω, CL = 4 pF conditions. Bandwidth scales inversely with feedback resistance; reducing RF below 301 Ω risks peaking or instability due to current-feedback topology constraints.

Is the ADA4861-3YRZ-RL suitable for single-supply ADC buffer applications?

Yes-the ADA4861-3YRZ-RL supports rail-to-rail output swing and can be biased for single-supply operation using ac-coupled inputs and mid-supply reference networks (e.g., Figure 53). With 12 ns settling time and 3.8 nV/√Hz input voltage noise, it preserves dynamic performance for 12–14-bit, 100+ MSPS ADCs when configured with appropriate input common-mode voltage (1.2–3.8 V at 5 V supply).