Analog Devices Inc. AD842JRZ-16

Overview

AD842JRZ-16 from Analog Devices is a wideband, high-output-current operational amplifier optimized for precision high-speed signal conditioning. It delivers 80 MHz gain bandwidth, 375 V/µs slew rate, and settles to 0.01% in 100 ns for a 10 V step-enabling use in 12-bit data acquisition systems, video line drivers, and DAC/ADC buffer stages.

For engineers reviewing the AD842JRZ-16 datasheet, AD842JRZ-16 pinout, AD842JRZ-16 application, or AD842JRZ-16 equivalent, key selection criteria include guaranteed 100 mA output drive into 499 Ω, ±15 V operation with 14 mA max quiescent current, low 9 nV/√Hz input voltage noise, and SOIC_W (RW-16) package compatibility with high-density PCB layouts.

Technical Context

The AD842JRZ-16 employs Analog Devices' junction-isolated complementary bipolar (CB) process, enabling simultaneous dc precision and ac performance unattainable in earlier monolithic op amps. Its fully differential input stage ensures stable operation at gains ≥2, while internal compensation eliminates external phase compensation requirements.

Designed for demanding transient fidelity, the device achieves sub-100 ns linear settling via minimized transistor isolation capacitance discharge and thermally stable biasing-critical for pulse amplification and fast-settling active filters where overshoot and settling tails degrade system accuracy.

Key Specifications

Pinout & Package

AD842JRZ-16 is housed in a 16-lead SOIC_W (RW-16) package with 1.27 mm lead pitch, 10.5 mm × 7.6 mm body size, and exposed thermal pad-compatible footprint per JEDEC MS-013-AA. Thermal resistance θ_JA = 100°C/W enables operation up to +70°C ambient without forced airflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed op amp applications.

Compared with OPA695ID and LMH6702MA, the AD842JRZ-16 provides optimal balance of 100 mA output drive, 9 nV/√Hz noise, and guaranteed 0.01% settling in 100 ns-making it uniquely suitable for DC-coupled, high-fidelity line driving and data acquisition buffer roles where both precision and speed are mandatory.

Availability

AD842JRZ-16 is available at Aetrix Electronics and suitable for video instrumentation, high-speed data acquisition, and precision analog interface applications requiring stable component supply across industrial and test equipment lifecycles.

Supply support for AD842JRZ-16 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 AD842JRZ-16 belongs to Analog Devices' precision high-speed op amp product line, engineered specifically for applications demanding simultaneous wide bandwidth, low noise, high output current, and fast settling-such as video, instrumentation, and data conversion systems.

FAQ

What is the maximum operating temperature for the AD842JRZ-16?

The AD842JRZ-16 is rated for operation from 0°C to +70°C ambient temperature, consistent with its commercial-grade SOIC_W (RW-16) packaging and JEDEC MS-013-AA compliance. Its thermal characteristics specify θ_JA = 100°C/W, allowing safe operation at full 14 mA quiescent current and 100 mA output load within this range without heatsinking. Exceeding +70°C ambient may cause parametric shift beyond datasheet limits.

Does the AD842JRZ-16 require external compensation for unity-gain stability?

No, the AD842JRZ-16 is internally compensated and stable at gains of 2 or greater. It is not unity-gain stable; attempting unity-gain operation risks oscillation due to phase margin erosion. For gain-of-1 applications, use a minimum noise-gain configuration (e.g., gain-of-2 with resistive divider feedback) or select a unity-gain-stable alternative such as the AD8001. The datasheet explicitly states "Stable at gains of 2 or greater" as a core feature.

Can the AD842JRZ-16 drive a 50 Ω load directly?

Yes, the AD842JRZ-16 can drive a 50 Ω load directly: its 100 mA minimum output current specification guarantees ±5 V output into 50 Ω (per Terminated Line Driver section), and Figure 32 confirms operation in doubly terminated 50 Ω/75 Ω cable configurations. However, sustained full-scale output into 50 Ω increases power dissipation-thermal design must ensure junction temperature remains below 150°C using the SOIC_W package's θ_JA = 100°C/W rating.

What is the purpose of the BALANCE pins on the AD842JRZ-16?

The BALANCE pins (Pins 1 and 16) on the AD842JRZ-16 provide access to the amplifier's internal offset null network. Connecting a 10 kΩ potentiometer between these pins-with its wiper tied to V–-allows precise adjustment of input offset voltage down to sub-millivolt levels. This feature eliminates external nulling circuitry in applications sensitive to dc error, such as precision line drivers and calibrated sensor interfaces, as confirmed in the Offset Nulling section (Figure 28) and Product Highlights.

How does capacitive loading affect the AD842JRZ-16's stability?

The AD842JRZ-16 is designed to drive capacitive loads up to 20 pF without performance degradation; loads exceeding 20 pF reduce bandwidth and increase settling time, while loads above 100 pF risk instability and oscillation. To maintain specified 100 ns settling and 375 V/µs slew rate, keep trace capacitance, ADC input capacitance, and probe loading below 20 pF-or add a small series resistor (e.g., 10–50 Ω) between output and load to isolate capacitance, as recommended in the Capacitive Load Driving Ability section.