Analog Devices Inc. AD13465AF

Overview

AD13465AF from Analog Devices is a dual-channel, 14-bit, 65 MSPS analog-to-digital converter with integrated analog input signal conditioning, on-chip track-and-hold, and two-pole Nyquist filtering. It delivers 85 dB spurious-free dynamic range at 4.98 MHz, 90 dB channel-to-channel isolation, and operates from ±5.0 V analog and 3.3 V digital supplies in radar and I/Q baseband receivers.

For engineers reviewing the AD13465AF datasheet, AD13465AF pinout, AD13465AF application, or AD13465AF equivalent, key selection criteria include guaranteed 65 MSPS sample rate, ±0.5 V / ±1.0 V selectable single-ended input ranges, differential input impedance of 618 Ω, two's complement CMOS outputs, and MIL-qualified ceramic gull-wing packaging for ruggedized systems.

Technical Context

The AD13465AF implements a multipass pipeline architecture with three internal pipelines to achieve 14-bit resolution at 65 MSPS. Each channel integrates discrete high-speed components: AD8037 amplifier (100 MHz bandwidth), AD8138 differential driver (300 MHz –3 dB BW), AD8031 reference buffer, and AD6644 ADC core - all co-packaged with laser-trimmed thin-film resistor networks for precision matching.

Analog input paths support both single-ended (via AMP-IN-X-1/AMP-IN-X-2) and differential (A+IN/A–IN, B+IN/B–IN) configurations with DC-coupled signal conditioning. Channel independence is enforced by separate analog/digital supply domains (AVCC/AVEE/DVCC), isolated ground planes (AGNDA/AGNDB/DGNDA/DGNDB), and internal shield (SHIELD pins) to maintain 90 dB inter-channel isolation.

Key Specifications

Pinout & Package

The AD13465AF is housed in a 68-lead ceramic leaded chip carrier (CLCC) package with nonconductive tie-bar (ES-68C), rated for –25°C to +85°C case temperature and qualified per MIL-38534 QML Class-H standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.

Compared with AD13280AZ and AD6644ASTZ-65, the AD13465AF uniquely combines dual-channel 14-bit conversion, on-board amplification, and MIL-qualified packaging - reducing total system component count by ≥4 ICs while maintaining 85 dB SFDR in harsh environments.

Availability

AD13465AF is available at Aetrix Electronics and suitable for radar processing, I/Q baseband operation, and phased array receivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD13465AF 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 AD13465AF belongs to Analog Devices' high-speed data acquisition product line, engineered specifically for defense and aerospace signal intelligence systems demanding guaranteed 65 MSPS operation, MIL-qualified reliability, and integrated analog front-end functionality.

FAQ

What is the guaranteed minimum sample rate for the AD13465AF?

The AD13465AF guarantees a minimum sample rate of 65 MSPS across its specified operating temperature range of –25°C to +85°C. This is validated per MIL-38534 test flow with 100% production testing at 25°C and sample testing at temperature extremes. The AD13465AF maintains full AC performance-including 85 dB SFDR and 72 dBFS SNR-at this rate, making it suitable for demanding radar and communications applications where timing margin is critical.

Does the AD13465AF require external analog input amplification?

No, the AD13465AF does not require external analog input amplification. It integrates an AD8037 amplifier, AD8138 differential driver, and AD8031 reference buffer per channel-enabling direct connection of ±0.5 V or ±1.0 V single-ended signals or ±1.0 V differential signals. The on-chip two-pole Nyquist filter further eliminates the need for external anti-aliasing components, reducing bill-of-materials and board area versus discrete solutions like the AD6644ASTZ-65.

What are the power supply requirements for the AD13465AF?

The AD13465AF requires three independent supplies: ±5.0 V analog (AVCC = +5.0 V, AVEE = –5.0 V) for signal conditioning and ADC core, and 3.3 V digital (DVCC) for CMOS-compatible outputs. Total supply current is 403 mA per channel (369–403 mA typical), resulting in 3.9 W total power dissipation. Linear regulation and local 0.1 µF decoupling at each supply pin are mandatory to maintain 85 dB SFDR performance.

How is channel isolation achieved in the AD13465AF?

Channel isolation in the AD13465AF is achieved through physical and electrical separation: dedicated analog ground pins (AGNDA/AGNDB), separate digital ground pins (DGNDA/DGNDB), internal shield connections (Pins 1 and 35), and independent analog/digital supply domains. This architecture delivers 90 dB channel-to-channel isolation, measured with one channel grounded and full-scale signal applied to the other-critical for coherent I/Q sampling in GPS anti-jamming and phased array systems where leakage causes phase distortion.

Is the AD13465AF pin-compatible with other devices in its family?

Yes, the AD13465AF is pin-compatible with the 12-bit AD13280 product family (e.g., AD13280AZ), sharing the same 68-lead ES-68C ceramic package and identical pin assignments for power, ground, analog inputs, encode, and digital outputs. This allows drop-in replacement in existing designs where increased resolution is needed, though system-level validation of timing margins and noise floor is recommended due to the AD13465AF's higher dynamic range and power consumption.