Analog Devices Inc. AD8044ANZ

Overview

AD8044ANZ from Analog Devices is a quad, rail-to-rail output, voltage-feedback high-speed amplifier optimized for +3 V, +5 V, or ±5 V operation. It delivers 150 MHz –3 dB bandwidth (G = +1), 170 V/µs slew rate, and output swing within 25 mV of either rail - enabling full dynamic range in video buffering, A/D driver, and multichannel ultrasound front-ends.

For engineers reviewing the AD8044ANZ datasheet, AD8044ANZ pinout, AD8044ANZ application, or AD8044ANZ equivalent, this page provides verified specifications, validated pin functions, confirmed video-grade performance (0.04% differential gain error, 0.22° phase error at NTSC), and real-world layout-critical design values including capacitive load drive up to 40 pF and input common-mode range extending 200 mV below ground.

Technical Context

The AD8044ANZ uses Analog Devices' eXtra-Fast Complementary Bipolar (XFCB) process, integrating matched PNP/NPN transistors with f_T > 2 GHz to achieve low distortion (–68 dBc THD @ 5 MHz) and fast settling (40 ns to 0.1%) without phase reversal when inputs exceed supplies by 1 V. Its differential-input stage minimizes nonlinear junction capacitance effects.

Rail-to-rail output is implemented via a complementary common-emitter stage with direct base current injection into Q8/Q36, enabling 30 mA output drive while maintaining ≤0.5 V saturation voltage. Input stage supports –0.2 V to +4 V common-mode range on +5 V supply, with no phase reversal beyond rails.

Key Specifications

Pinout & Package

AD8044ANZ is housed in a 14-lead plastic DIP (PDIP) package with 0.300-inch body width and through-hole mounting. Pin 1 is marked with a notch or dot; top-side orientation matches the labeled "TOP VIEW" diagram in the datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed operational amplifier applications.

Compared with AD8044ANZ, AD8042ARZ offers identical per-amplifier performance in half the channel count and footprint, while THS4031CD trades bandwidth, video linearity, and power efficiency for broader vendor availability - making AD8044ANZ the sole choice for integrated quad-channel, broadcast-grade video signal paths.

Availability

AD8044ANZ is available at Aetrix Electronics and suitable for RGB video buffering, ultrasound multichannel front-ends, and high-speed A/D converter driver applications requiring stable component supply, long-term industrial lifecycle support, and Pb-free compliance.

Supply support for AD8044ANZ 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 AD8044ANZ belongs to Analog Devices' high-speed voltage-feedback amplifier product line, engineered specifically for demanding video, imaging, and instrumentation applications where rail-to-rail output, low distortion, and multi-channel integration are essential.

FAQ

What supply voltages does the AD8044ANZ support?

The AD8044ANZ operates from single supplies of +3 V to +12 V, dual supplies of ±3 V to ±6 V, or asymmetric supplies including +5 V/0 V and ±5 V. Its input common-mode range extends 200 mV below the negative rail and within 1 V of the positive rail, and its output swings to within 25 mV of either rail - making AD8044ANZ compatible with both legacy ±5 V systems and modern low-voltage portable designs.

Does the AD8044ANZ require external compensation for stability?

No, the AD8044ANZ is internally compensated for unity-gain stability across its full operating range. It maintains ≥45° phase margin driving 150 Ω loads and remains stable with capacitive loads up to 40 pF when configured at G = +2. Layout best practices - including short feedback traces, local 0.1 µF bypass caps at each supply pin, and ground plane isolation near inputs - are required to preserve specified 150 MHz bandwidth and 40 ns settling time in AD8044ANZ applications.

Can the AD8044ANZ drive standard 75 Ω video loads?

Yes, the AD8044ANZ is explicitly characterized for 75 Ω video loads in its datasheet: it delivers 0.04% differential gain error and 0.22° differential phase error under NTSC conditions (G = +2, RL = 150 Ω to 2.5 V), and maintains 0.1 dB gain flatness to 12 MHz. When driving 75 Ω directly, output swing reduces to 0.55 V to 4.4 V (on +5 V supply), which fully accommodates 700 mV_pp RGB signals with headroom for sync pulses - confirming AD8044ANZ's suitability for professional camera and distribution amplifier designs.

How does the AD8044ANZ handle overdrive recovery?

The AD8044ANZ recovers from output overdrive in 25 ns for positive excursions and 50 ns for negative excursions, as measured with a 4 V step input at G = +2, RL = 2 kΩ, and VS = +5 V. This fast recovery prevents pulse distortion in time-critical applications like ultrasound echo processing and high-speed data acquisition, where consecutive large-signal events occur within nanoseconds - a key differentiator from slower general-purpose op-amps that may require microseconds to recover.

Is the AD8044ANZ pin-compatible with other AD80xx-series amplifiers?

No, the AD8044ANZ has a unique 14-pin PDIP pinout optimized for quad-channel routing and minimized crosstalk; it is not pin-compatible with AD8041 (single), AD8042 (dual), or AD8045 (single, faster variant). Each device uses distinct pin assignments for power, inputs, and outputs - for example, AD8044ANZ places V– on Pin 8 and dedicates Pins 12–14 to Amplifier A, whereas AD8042 uses Pins 4 and 8 for V– and V+, respectively. Migration requires PCB redesign, though schematic topology and performance targets remain transferable across the AD80xx family.