Analog Devices Inc. AD8390ACPZ-REEL7

Overview

AD8390ACPZ-REEL7 from Analog Devices is a high-output-current, low-power, fully differential voltage-feedback amplifier optimized for ADSL/ADSL2+ central office line driver applications. It delivers 44.2 V_p-p differential output swing, 400 mA peak output current, and –91 dBc third-harmonic distortion at 1 MHz into 100 Ω, enabling robust signal drive across hybrid and transformer-coupled xDSL interfaces.

For engineers reviewing the AD8390ACPZ-REEL7 datasheet, AD8390ACPZ-REEL7 pinout, AD8390ACPZ-REEL7 application, or AD8390ACPZ-REEL7 equivalent, this page provides verified specifications, thermal-aware LFCSP-16 package details, power-mode control logic (PWDN0/PWDN1), VOCM configuration guidance, and real-world ADSL2+ line driver implementation constraints - all grounded in Rev. C datasheet measurements and functional block diagram validation.

Technical Context

The AD8390ACPZ-REEL7 implements a three-amplifier functional architecture: two matched gain stages (A/B) in inverting configuration plus a dedicated common-mode feedback amplifier (C) that forces V_OUT,CM = V_OCTM. Its closed-loop differential gain is set by external RF/RG resistors (e.g., G = 10 with RF = 10 kΩ, RG = 1 kΩ), while input impedance equals 2 × RG.

Power management is implemented via dual digital PWDN pins selecting four bias states (full-on to shutdown) and an analog IADJ pin enabling fine quiescent current trimming - e.g., total supply current scales from 0.57 mA (PWDN=00, IADJ=VEE) to 11.0 mA (PWDN=11, IADJ=NC) under ±12 V operation. Output common-mode voltage is externally programmable via VOCM pin with 0.996–1.004 V/V accuracy.

Key Specifications

Pinout & Package

The AD8390ACPZ-REEL7 is packaged in a thermally enhanced 4 mm × 4 mm, 16-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle for PCB heat sinking. Thermal resistance θ_JA = 30.4°C/W with nine thermal vias and paddle soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8391ACPZ-REEL7, the AD8390ACPZ-REEL7 delivers double the output current and programmable bias for CO-grade line power; versus THS6212IRHFT, it trades raw speed for 50% lower quiescent current and integrated power management essential for multi-port DSLAMs.

Availability

AD8390ACPZ-REEL7 is available at Aetrix Electronics and suitable for ADSL2+ central office line cards, xDSL hybrid interface modules, and high-crest-factor test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD8390ACPZ-REEL7 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 digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The AD8390ACPZ-REEL7 belongs to Analog Devices' xDSL line driver product line, engineered specifically for energy-efficient, thermally robust central office deployment in ADSL/ADSL2+ infrastructure with emphasis on MTPR compliance and dynamic power scaling.

FAQ

What power supply configurations does the AD8390ACPZ-REEL7 support?

The AD8390ACPZ-REEL7 operates from dual supplies of ±5 V to ±12 V or single supplies of +10 V to +24 V. Absolute maximum ratings allow ±13.2 V. Each supply rail requires local decoupling: 0.1 µF ceramic + 10 µF bulk capacitor placed within 5 mm of VCC/VEE pins. The DGND pin serves as logic reference for PWDN inputs and must be tied to system digital ground.

How does the VOCM pin function in the AD8390ACPZ-REEL7?

The VOCM pin in the AD8390ACPZ-REEL7 sets the output common-mode voltage with 0.996–1.004 V/V accuracy. When left floating and bypassed with 0.1 µF, it defaults to midsupply. It can be driven externally to force a specific DC level (e.g., 0 V for dual ±12 V supplies), but is not intended for AC signal injection. Input resistance is 28 kΩ, and voltage range is –11.0 V to +10.0 V under ±12 V operation.

What are the four power-down modes of the AD8390ACPZ-REEL7 and how are they selected?

The AD8390ACPZ-REEL7 uses PWDN1 and PWDN0 pins to select four bias states: (1,1) = full power, (1,0) = mid-bias, (0,1) = low-bias, and (0,0) = shutdown. Logic thresholds are V_IL ≤ 1.0 V and V_IH ≥ 1.6 V referenced to DGND. Total quiescent current ranges from 0.57 mA (shutdown) to 11.0 mA (full power, IADJ open), scalable further via IADJ connection to VEE or resistor divider.

Can the AD8390ACPZ-REEL7 drive a 10 Ω load continuously?

Yes - the AD8390ACPZ-REEL7 delivers 400 mA linear output current into 10 Ω loads at 100 kHz, as specified in Table 1. However, continuous 400 mA into 10 Ω demands careful thermal design: junction temperature must stay below 150°C. With θ_JA = 30.4°C/W and 4.8 W dissipation (V_CC–V_EE = 24 V × 0.2 A), board copper area and thermal vias must be optimized per Figure 26 in the AD8390ACPZ-REEL7 datasheet.

What is the significance of Multitone Power Ratio (MTPR) for the AD8390ACPZ-REEL7?

MTPR quantifies spectral purity in xDSL systems: AD8390ACPZ-REEL7 achieves –70 dBc at 26 kHz–1.1 MHz and –65 dBc at 26 kHz–2.2 MHz under 19.8 dBm line power and 5.4 crest factor. This directly impacts DSLAM port density and bit-error-rate - higher (less negative) MTPR values indicate greater harmonic/intermodulation distortion that violates ITU-T G.992.3/G.992.5 masks.