Analog Devices Inc. AD8148ACPZ-R2

Overview

AD8148ACPZ-R2 from Analog Devices is a triple, high-speed, fully differential video driver IC with fixed gain of 4, designed for RGB component video transmission over UTP cable or PCB traces. It delivers 700 MHz −3 dB large-signal bandwidth (2 V_p-p), 3000 V/µs slew rate, and −49 dB output balance error at 50 MHz, enabling 1080p and QXGA video distribution in KVM and broadcast infrastructure systems.

For engineers reviewing the AD8148ACPZ-R2 datasheet, AD8148ACPZ-R2 pinout, AD8148ACPZ-R2 application, or AD8148ACPZ-R2 equivalent, this page provides verified functional specifications, validated pin roles, confirmed sync-on-common-mode operation for HSYNC/VSYNC encoding, and real-world design context for UTP-based video routing and differential multiplexing.

Technical Context

The AD8148ACPZ-R2 implements dual-loop feedback architecture: one internal loop controls differential output voltage (gain = 4), while a separate common-mode feedback loop encodes sync pulses onto output common-mode voltages via dedicated SYNC LEVEL, HSYNC, and VSYNC inputs. This enables simultaneous RGB signal transmission and timing synchronization over three differential pairs without additional wires.

Each of its three amplifiers features independent VOCM control logic, on-chip sync-level gain calibration (0.93–1.10 V/V to red, 1.91–2.15 V/V to green, −1.10 to −0.93 V/V to blue), and output pull-down (OPD) for line isolation-supporting dynamic differential multiplexing across shared twisted-pair cabling.

Key Specifications

Pinout & Package

AD8148ACPZ-R2 is housed in a 24-lead, 4 mm × 4 mm LFCSP_WQ package with exposed paddle (GND). The underside thermal pad must be soldered to a PCB ground plane for thermal compliance and specified θ_JA = 57°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple differential driver applications.

Compared with AD8147ACPZ-R2 and THS7374IPWPR, AD8148ACPZ-R2 uniquely combines 4× gain, 700 MHz bandwidth, and hardware-sync encoding-making it the only option for high-fidelity, long-reach, sync-integrated RGB over UTP.

Availability

AD8148ACPZ-R2 is available at Aetrix Electronics and suitable for 1080p video transmission, KVM networking, and video-over-UTP infrastructure requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for AD8148ACPZ-R2 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, with design centers worldwide.

The AD814x family was developed specifically for high-resolution analog video distribution over cost-effective UTP cabling-addressing bandwidth, sync integration, and EMI challenges in broadcast, medical imaging, and professional AV systems.

FAQ

What is the function of the SYNC LEVEL pin on the AD8148ACPZ-R2?

The SYNC LEVEL pin on the AD8148ACPZ-R2 sets the amplitude of HSYNC and VSYNC pulses encoded onto the RGB output common-mode voltages. With a nominal 0.5 V input, it produces calibrated sync swings: 0.93–1.10 V/V to red, 1.91–2.15 V/V to green, and −0.93 to −1.10 V/V to blue outputs. This enables precise, distortion-free timing recovery at the receiver without external sync circuitry-critical for jitter-sensitive 1080p systems using AD8148ACPZ-R2.

Does the AD8148ACPZ-R2 support single-ended input operation?

Yes, the AD8148ACPZ-R2 accepts single-ended inputs on each channel: for example, +IN R (pin 4) referenced to ground while −IN R (pin 3) is terminated to mid-supply. Input resistance is 833 Ω in single-ended mode. The internal common-mode feedback maintains output balance and suppresses even-order harmonics regardless of input configuration-making AD8148ACPZ-R2 flexible for legacy video sources with single-ended outputs.

How does the OPD (Output Pull-Down) feature work on the AD8148ACPZ-R2?

The OPD pin (pin 1) on the AD8148ACPZ-R2 asserts a low-impedance state on all six outputs when driven high (>2.0 V), pulling each output to −1.6 V (at ±2.5 V supply) or −3.8 V (at ±5 V). With 600 ns assert and 10 ns deassert times, it enables glitch-free differential bus sharing in multiplexed UTP systems. This eliminates need for external series diodes-directly supporting reconfigurable video routing architectures built around AD8148ACPZ-R2.

What is the maximum operating temperature range for the AD8148ACPZ-R2?

The AD8148ACPZ-R2 is rated for continuous operation from −40°C to +85°C ambient temperature. Its LFCSP_WQ package achieves θ_JA = 57°C/W when the exposed paddle is soldered to a thermally connected ground plane on a 4-layer PCB. Junction temperature must remain below 150°C; derating curves in Figure 3 of the datasheet define safe power limits across this full range-ensuring reliability in industrial video enclosures and rack-mounted KVM systems using AD8148ACPZ-R2.

Can the AD8148ACPZ-R2 drive two 100 Ω UTP cables simultaneously per channel?

No-the AD8148ACPZ-R2 is characterized to drive one 100 Ω UTP cable per channel (i.e., three total cables for RGB). Driving two 100 Ω loads in parallel presents a 50 Ω differential load, exceeding the specified 200 Ω minimum RL,dm and degrading bandwidth, balance, and settling behavior. For dual-cable fan-out, use one AD8148ACPZ-R2 per cable or add external buffering-AD8148ACPZ-R2's design assumes single-point-to-point UTP transmission per amplifier.