ADL5385ACPZ Package and Pinout Reference
The ADL5385ACPZ from Analog Devices is a highly capable broadband quadrature modulator operating across the 50 MHz to 2.2 GHz frequency spectrum. Precision-engineered for wireless infrastructure, the device takes baseband I and Q signals, modulates them onto an RF carrier with exceptional phase accuracy, and outputs a highly linear RF signal, solidifying its place in high-performance GSM, CDMA, and broadband wireless communication systems.
Table of Contents
1. Overview and Core Features
Operating optimally with a single 5V supply, the ADL5385ACPZ achieves remarkable RF performance margins. It outputs a 1dB compression point (P1dB) around 11 dBm and an OIP3 (Output Third-Order Intercept Point) measuring near 26 dBm at 350 MHz. These metrics allow designers to drive subsequent power amplifier stages with minimal distortion. Moreover, its inherently low broadband noise floor (-158 dBm/Hz) ensures high-density QAM (Quadrature Amplitude Modulation) signals maintain superior error vector magnitude (EVM) parameters.
2. Specifications and Parameter Table
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Operating Frequency | 50 MHz to 2.2 GHz |
| Supply Voltage | 4.75V to 5.25V |
| Output IP3 | 26 dBm (at 350 MHz) |
| Output P1dB | 11 dBm (at 350 MHz) |
| Broadband Noise Floor | -158 dBm/Hz |
| Package | 24-lead LFCSP |
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Check ADL5385ACPZ Stock3. Architecture and Block Diagram
The internal architecture incorporates two matched double-balanced mixers, a highly stable local oscillator (LO) quadrature phase splitter, and an integrated voltage-to-current converter on the baseband inputs. The LO path necessitates a low-noise driving signal, which is internally split into 0° and 90° phases. These orthoganal carriers then mix with the differential I and Q baseband signals, recombining efficiently before exiting through the differential RF output port.
4. Video: Feature Breakdown
5. Equivalents, Cross-Reference, and Lifecycle
As an active component in the Analog Devices RF portfolio, the ADL5385ACPZ enjoys an extended lifecycle commitment. While direct drop-in equivalents from competitors are exceedingly rare due to the proprietary LFCSP pinout and IP3 calibration, hardware engineers might examine the ADL537X family if altering frequency bandwidths or shifting entirely to direct upconversion modulators manufactured by Texas Instruments or NXP for a multi-source PCB redesign.
6. Frequently Asked Questions (FAQ)
What frequency range does the ADL5385ACPZ cover?
The device operates effectively from 50 MHz up to 2.2 GHz.
What type of baseband signals are required?
It requires differential I (In-phase) and Q (Quadrature) analog baseband signals.
Alan Carter, Senior Hardware Engineer
Alan has over 15 years of experience in embedded systems design, specializing in ARM Cortex architectures, PCB routing for high-speed digital signals, and industrial IoT deployments. He frequently contributes technical teardowns and architecture comparisons.
