Analog Devices Inc. AD8139ACPZ-REEL

Overview

AD8139ACPZ-REEL from Analog Devices is a rail-to-rail, low-noise, fully differential ADC driver IC optimized for high-resolution data acquisition systems. It delivers 410 MHz small-signal bandwidth (G = 1), 800 V/µs slew rate, 2.25 nV/√Hz input voltage noise, and 98 dBc SFDR at 1 MHz - enabling clean signal conditioning for 18-bit analog-to-digital converters in precision instrumentation and communications infrastructure.

For engineers reviewing the AD8139ACPZ-REEL datasheet, AD8139ACPZ-REEL pinout, AD8139ACPZ-REEL application, or AD8139ACPZ-REEL equivalent, key selection criteria include differential output balance (−69 dB at 1 MHz), adjustable VOCM control, ±5 V to +12 V supply flexibility, and guaranteed operation from −40°C to +125°C in the 3 mm × 3 mm LFCSP package.

Technical Context

The AD8139ACPZ-REEL employs an internal common-mode feedback loop that forces output common-mode voltage (VO,cm) to track the VOCM pin voltage with 0.999–1.001 gain and 515 MHz bandwidth, decoupling output level control from input common-mode range. Its H-bridge input stage enables high slew rate and low distortion while supporting both single-ended-to-differential and differential-to-differential configurations using only four external resistors.

This architecture achieves 80 dB dc CMRR and suppresses even-order harmonics via precise output amplitude and phase matching - critical for maintaining SFDR >85 dBc up to 5 MHz and minimizing intermodulation distortion in wideband receivers and digitizers.

Key Specifications

Pinout & Package

The AD8139ACPZ-REEL is housed in an 8-lead, 3 mm × 3 mm LFCSP package with exposed paddle (EP) for thermal and electrical grounding. Pin 1 is −IN; Pin 2 is VOCM; Pin 3 is V+; Pin 4 is +OUT; Pin 5 is −OUT; Pin 6 is V−; Pin 7 is NIC; Pin 8 is +IN; EP must be soldered to ground or power plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with THS4561IRGET and ADA4945-1ACPZ-R7, the AD8139ACPZ-REEL uniquely combines VOCM-adjustable rail-to-rail output, −69 dB output balance at 1 MHz, and 98 dBc SFDR at 1 MHz - making it the preferred choice for high-SFDR, high-precision ADC driving where output level control and harmonic suppression are critical.

Availability

AD8139ACPZ-REEL is available at Aetrix Electronics and suitable for high-speed data acquisition, communications baseband processing, differential cable drivers, industrial sensor signal conditioning, and precision instrumentation requiring stable component supply across extended temperature ranges.

Supply support for AD8139ACPZ-REEL 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 Wilmington, MA.

The AD8139 belongs to Analog Devices' precision high-speed amplifier product line, designed specifically for demanding differential signal conditioning in data converter interfaces, communications infrastructure, and industrial measurement systems.

FAQ

What is the maximum small-signal bandwidth of the AD8139ACPZ-REEL?

The AD8139ACPZ-REEL achieves a typical −3 dB small-signal bandwidth of 410 MHz at G = 1 with ±5 V supplies. This bandwidth is measured under standard conditions (VO,dm = 0.1 V p-p, RL,dm = 1 kΩ, RF = RG = 200 Ω) and supports high-speed ADC sampling up to 100+ MSPS without significant gain attenuation. Bandwidth decreases with increasing closed-loop gain per the β × 300 MHz approximation above G = 4.

Does the AD8139ACPZ-REEL support single-supply operation?

Yes, the AD8139ACPZ-REEL supports single-supply operation from +4.5 V to +12 V. When operated with +5 V supply and VOCM = 2.5 V, it delivers rail-to-rail output swing (−0.15 V to +4.85 V per output) and maintains 99 dBc SFDR at 1 MHz. Input common-mode range shifts to 1 V to 4 V under these conditions, requiring appropriate signal biasing.

How does the VOCM pin function in the AD8139ACPZ-REEL?

The VOCM pin on the AD8139ACPZ-REEL controls the output common-mode voltage (VO,cm) via an internal feedback loop that forces (VOP + VON)/2 to equal the applied VOCM voltage with 0.999–1.001 gain and 515 MHz bandwidth. This allows independent setting of output DC level - essential for interfacing with ADCs requiring specific input common-mode voltages - without affecting differential gain or introducing additional components.

What package type is used for the AD8139ACPZ-REEL?

The AD8139ACPZ-REEL uses an 8-lead, 3 mm × 3 mm LFCSP (Lead Frame Chip Scale Package) with exposed paddle (EP). The EP must be soldered to a PCB ground or power plane for optimal thermal dissipation and electrical performance. This package offers low inductance, excellent high-frequency behavior, and compatibility with automated assembly processes.

What is the output balance specification for the AD8139ACPZ-REEL?

The AD8139ACPZ-REEL specifies −69 dB output balance error at 1 MHz, defined as ΔVO,cm / ΔVO,dm. This metric reflects the degree of amplitude and phase matching between +OUT and −OUT, directly impacting second-harmonic distortion and common-mode rejection in differential signaling paths. The internal common-mode feedback loop maintains this balance without requiring matched external resistors.