Analog Devices Inc. ADL6317ACCZ-R7

Overview

ADL6317ACCZ-R7 from Analog Devices is a transmit variable gain amplifier (VGA) designed to interface RF DACs and transceivers to power amplifiers in broadband wireless infrastructure. It operates from 1500 MHz to 3000 MHz, delivers 34.0 dB typical gain at 2600 MHz, provides 20.5 dB integrated voltage-variable attenuation (VVA), supports 15.5 dB digital step attenuation (DSA) with 0.5 dB resolution, and features fully programmable 4-wire SPI control for LTE FDD/TDD base station transmit chains.

For engineers reviewing the ADL6317ACCZ-R7 datasheet, ADL6317ACCZ-R7 pinout, ADL6317ACCZ-R7 application, or ADL6317ACCZ-R7 equivalent, key selection criteria include RF frequency range (1500–3000 MHz), dual-stage high-linearity amplification, integrated balun for differential-to-single-ended conversion, VVA + DSA cascaded attenuation architecture, and LGA-38 package thermal performance (θJA = 21.4°C/W).

Technical Context

The ADL6317ACCZ-R7 implements a two-stage RF signal chain: differential input passes through an integrated balun and quadrature hybrid, then feeds a 20.5 dB VVA (controlled via 12-bit on-chip DAC or external analog voltage on VVA_ANALOG), followed by Amplifier 1, a 15.5 dB DSA with 0.5 dB steps, and Amplifier 2 - all optimized for high OIP3 (up to 40.9 dBm at 1850 MHz) and low noise figure (5.5 dB at 2600 MHz).

Its programmability relies on a 4-wire SPI interface supporting register writes for VVA (Registers 0x103/0x104), DSA (Registers 0x102/0x112), and mode control (TXEN pin and Register 0x105), with double-buffered VVA updates to suppress carrier glitches and gain settling times as fast as 195 ns (DSA max→min) and 386.8 ns (VVA min→max).

Key Specifications

Pinout & Package

The ADL6317ACCZ-R7 is housed in a 38-terminal, 10.5 mm × 5.5 mm LGA package with dual exposed pads (EPAD1/EPAD2) internally connected and requiring PCB grounding for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transmit VGA applications.

Compared with HMC997LP5E and ADL6316ACPZ-R7, the ADL6317ACCZ-R7 uniquely integrates balun, quadrature hybrids, 12-bit VVA DAC, and LTE-optimized linearity in a single LGA package - eliminating 7+ discrete components and reducing design cycle time by ~6 weeks for cellular infrastructure.

Availability

ADL6317ACCZ-R7 is available at Aetrix Electronics and suitable for LTE base stations, 5G NR remote radio heads, active antenna systems, and software-defined radio transceivers requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for ADL6317ACCZ-R7 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 is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, automotive, and healthcare markets with precision signal processing solutions.

The ADL6317ACCZ-R7 belongs to Analog Devices' transmit VGA product line, engineered specifically for high-dynamic-range, multicarrier wireless infrastructure transmitters operating in licensed cellular bands from 1500 MHz to 3000 MHz.

FAQ

What is the primary function of the ADL6317ACCZ-R7 in a wireless transmitter?

The ADL6317ACCZ-R7 serves as a transmit variable gain amplifier that interfaces RF DACs or transceivers to power amplifiers. It provides programmable gain, 20.5 dB VVA attenuation, 15.5 dB DSA attenuation, and integrated balun functionality - all within a single LGA package. Its role is to condition and scale the RF signal for optimal PA drive while maintaining linearity and spectral purity in LTE and 5G NR base station applications.

Does the ADL6317ACCZ-R7 require external matching components at its RF ports?

No, the ADL6317ACCZ-R7 does not require external matching components at its RF ports. It integrates a balun for differential-to-single-ended conversion at the input and quadrature hybrids at both input and output, enabling direct 50 Ω interfacing with RF DACs and PAs. Measured return loss exceeds −17.4 dB across 1500–3000 MHz, confirming broadband 50 Ω match without discrete matching networks.

How is gain controlled on the ADL6317ACCZ-R7 - analog or digital?

The ADL6317ACCZ-R7 supports dual-mode gain control: the 20.5 dB VVA can be set either digitally via a 12-bit on-chip DAC (using Registers 0x103 and 0x104) or analog via an external voltage applied to the VVA_ANALOG pin (Pin 30). The 15.5 dB DSA uses purely digital 5-bit control (Registers 0x102/0x112). Both paths are fully programmable over the 4-wire SPI interface.

What is the thermal performance of the ADL6317ACCZ-R7 in high-power operation?

The ADL6317ACCZ-R7 has a junction-to-ambient thermal resistance (θJA) of 21.4°C/W and junction-to-case (θJC) of 7.6°C/W in natural convection. With 435 mA supply current in high-performance mode and 5 V supply, proper PCB thermal design - including grounding the dual exposed pads and using ≥2 oz copper layers - ensures junction temperature remains within −40°C to +125°C limits even at full RF output power.

Can the ADL6317ACCZ-R7 be used in TDD systems requiring fast gain switching?

Yes, the ADL6317ACCZ-R7 is optimized for TDD systems. Its DSA achieves 195.0 ns settling time (maximum to minimum attenuation) and VVA settles in 386.8 ns (minimum to maximum), enabling sub-microsecond reconfiguration aligned with 3GPP TDD slot boundaries. The TXEN pin further supports synchronous amplifier enable/disable with 54.5 ns turn-on and 182.97 ns turn-off response.