AD8148ACPZ-RL

Overview

The AD8148ACPZ-RL is a triple high-speed fully differential driver designed for wideband video applications. It features a fixed gain of 4 V/V and operates with supply voltages ranging from +4.5 V to ±5.5 V. The device provides a large signal bandwidth of 700 MHz at 2 V p-p and a small signal bandwidth of 900 MHz. It exhibits a slew rate of 3000 V/µs and a 0.1 dB bandwidth of 235 MHz. Quiescent current is typically 62.5 mA at ±5 V. The component is housed in a 24-lead LFCSP package.

Feature Summary

• Triple differential driver architecture with fixed gain of 4 V/V
• On-chip sync-on common-mode encoding for vertical and horizontal sync signals
• Internal common-mode feedback network ensuring output balance error below -50 dB at 50 MHz
• Output pull-down feature enabling line isolation and differential multiplexing

Applications

• QXGA or 1080p video transmission systems
• Video distribution over unshielded twisted pair (UTP) cables
• KVM networking infrastructure
• Differential signal multiplexing applications

Procurement Notes

Verify the specific suffix RL against the manufacturer's ordering guide to confirm reel packaging specifications. Ensure compatibility with the 24-lead LFCSP_WQ thermal requirements, as the exposed paddle must be soldered to a ground plane. Confirm that the fixed gain of 4 V/V aligns with the system design, distinguishing it from the gain of 2 found in other family members.

Selection Notes

Select this component when a higher voltage gain is required compared to the AD8146 or AD8147 variants. The AD8148 is specifically optimized for driving Category 5 UTP cables or differential PCB transmission lines with high-resolution component video signals. Consider the internal sync-on common-mode encoding if direct sync signal integration is necessary without external circuitry.

Part Context

This part belongs to the AD8146/AD8147/AD8148 series of triple differential drivers manufactured on Analog Devices' second-generation XFCB bipolar process. While sharing similar bandwidth and slew rate characteristics, the AD8148 is distinguished by its fixed gain of 4 V/V and integrated sync-on common-mode encoding capabilities, unlike the gain of 2 found in the AD8146 and AD8147.

Replacement Considerations

The AD8146ACPZ-RL and AD8147ACPZ-RL are pin-compatible alternatives within the same series. However, they possess a fixed gain of 2 V/V, which differs from the AD8148's gain of 4 V/V. Designers must adjust feedback networks or system gain stages accordingly when substituting these parts.