Analog Devices Inc. AD8033ARZ

Overview

AD8033ARZ from Analog Devices is a single-channel, FET-input voltage-feedback operational amplifier optimized for high-speed, low-noise, rail-to-rail output applications. It delivers 80 MHz −3 dB bandwidth (G = +1), 80 V/μs slew rate (G = +2), and 11 nV/√Hz input voltage noise at 100 kHz - enabling precision buffering, active filtering, and instrumentation signal conditioning in space-constrained industrial and test equipment.

For engineers reviewing the AD8033ARZ datasheet, AD8033ARZ pinout, AD8033ARZ application, or AD8033ARZ equivalent, this page provides verified specifications, SOIC-8 package mapping, real-world use-value context for rail-to-rail output drive and FET-input bias current (1 pA typical), and two validated alternative op amps with documented functional trade-offs.

Technical Context

The AD8033ARZ employs a JFET-input stage fabricated in Analog Devices' XFCB process, combining low input bias current (1 pA typ.) with high-speed voltage feedback architecture. Its folded-cascade input topology enables bipolar-enhanced common-mode range (−5 V to +2.2 V on ±5 V supplies) and eliminates phase reversal - critical for level-shifting and sensor front-end designs where input overdrive may occur.

It features a common-emitter output stage delivering rail-to-rail swing (±4.95 V on ±5 V), 40 mA short-circuit current, and stable capacitive load drive up to 35 pF (30% overshoot, G = +1). Quiescent current remains fixed at 3.3 mA per amplifier across 5 V to 24 V supply range, supporting both single- and dual-supply operation without performance degradation.

Key Specifications

Pinout & Package

AD8033ARZ is packaged in an 8-lead SOIC (R) with standard pinout and no internal connections on pins 1, 5, and 8. The device is not pin-compatible with dual-channel AD8034 or other SOIC op amps due to unique NC placement and internal topology.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA656U and ADA4817-1ARMZ, AD8033ARZ uniquely balances 80 MHz bandwidth, 1 pA bias, 3.3 mA IQ, and SOIC-8 packaging - making it the optimal choice for cost-sensitive, space-constrained industrial signal conditioning where moderate speed and ultra-low power coexist.

Availability

AD8033ARZ is available at Aetrix Electronics and suitable for instrumentation signal conditioning, active filtering, single-supply level shifting, and photodiode preamplification requiring stable component supply across industrial temperature range (−40°C to +85°C).

Supply support for AD8033ARZ 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 AD8033/AD8034 FastFET™ family was designed specifically for cost-sensitive, high-speed analog signal paths demanding FET-input precision - targeting instrumentation, test equipment, and industrial control where low bias current and rail-to-rail output are non-negotiable.

FAQ

What is the maximum capacitive load the AD8033ARZ can drive stably?

The AD8033ARZ is characterized for stable operation with up to 35 pF capacitive load at unity gain (G = +1) with ≤30% overshoot. This capability enables direct driving of ADC input capacitance or long PCB traces without external isolation resistors. For loads exceeding 35 pF, a small series snub resistor (e.g., 25 Ω) between the AD8033ARZ output and the load restores stability, as confirmed in Figure 12 of the AD8033/AD8034 Rev. D datasheet. The AD8033ARZ maintains this performance across its full 5–24 V supply range.

Does the AD8033ARZ support true rail-to-rail input operation?

No - the AD8033ARZ features rail-to-rail *output*, not rail-to-rail input. Its FET-input common-mode range is −5.0 V to +2.2 V on ±5 V supplies (0 V to +2.0 V on +5 V single supply), meaning the inputs cannot swing to the positive rail. However, a bipolar auxiliary input stage activates near the positive rail to prevent phase reversal - a distinct advantage over basic FET op amps. This design allows safe overdrive up to +6 V on ±5 V supplies without output inversion, as verified in Figure 29 and the Input Overdrive section of the datasheet.

What is the typical input offset voltage drift of the AD8033ARZ over temperature?

The AD8033ARZ exhibits a typical input offset voltage drift of 4 μV/°C, with a maximum of 27 μV/°C over the industrial temperature range (−40°C to +85°C), per Table 1 (TA = 25°C, ±5 V). This low drift ensures minimal gain error accumulation in precision DC-coupled signal chains - such as strain gauge bridges or thermopile amplifiers - where ambient temperature variations would otherwise degrade accuracy. The drift specification is measured under standard conditions and remains consistent across all supported supply voltages (5–24 V).

Can the AD8033ARZ operate from a single 3.3 V supply?

No - the AD8033ARZ requires a minimum supply voltage of 5 V (total across +VS and −VS), as specified in the Absolute Maximum Ratings and Operating Range tables. It supports single-supply operation *only* when the total supply span is ≥5 V (e.g., +5 V and ground, or +12 V and ground). Operation at 3.3 V violates the absolute minimum rating and will result in undefined behavior, including failure to achieve rail-to-rail output swing or proper biasing of the JFET input stage. Always verify supply compliance using the "Operating Range" parameter (5 V to 24 V) in the datasheet.

How does the AD8033ARZ compare to the dual-channel AD8034 in terms of pin compatibility?

The AD8033ARZ (single) and AD8034 (dual) share the same 8-lead SOIC package footprint but are *not* pin-compatible. The AD8033ARZ uses pins 1, 5, and 8 as NC; the AD8034 repurposes pin 5 as −IN2 and pin 8 as +IN2. Attempting to substitute one for the other on the same PCB will cause functional failure. Both devices require separate layout footprints - the AD8033ARZ SOIC-8 pinout is shown in Figure 1, while the AD8034 SOIC-8 pinout appears in Figure 3 of the Rev. D datasheet. No shared pin mapping exists between the two variants.