AD8552ARZ Overview

AD8552ARZ is a dual-channel, zero-drift precision operational amplifier from Analog Devices and a member of the AD8551/AD8552/AD8554 ultra-low offset amplifier family.

It features an extremely low input offset voltage (typically only 1 μV) and ultra-low offset drift (0.005 μV/°C), along with very low input bias current, effectively minimizing error accumulation in high-precision applications. The AD8552ARZ offers rail-to-rail input and output operation and supports single-supply voltages from 2.7 V to 5 V, delivering stable and accurate signal amplification even in low-voltage systems.

In terms of reliability, the AD8552ARZ is specified for an industrial/automotive temperature range of −40°C to +125°C, making it suitable for long-term operation in demanding environments. It is available in an 8-lead narrow SOIC (ARZ) package, enabling easy surface-mount assembly while balancing performance, size, and manufacturability.

AD8552ARZ Key Specs

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AD8552ARZ Pinout

1. OUT A

Output of amplifier channel A. This pin provides the amplified signal and supports rail-to-rail output, making it suitable for driving ADCs or downstream signal-conditioning circuits.

2. IN− A

Inverting input of channel A. It is typically connected to a feedback network to set the gain or to implement filtering and signal conditioning functions.

3. IN+ A

Non-inverting input of channel A. The input signal is applied here. The rail-to-rail input capability allows accurate amplification of low-level signals in low-voltage systems.

4. V−

Negative supply pin. In single-supply applications, this pin is usually connected to ground (GND). In dual-supply configurations, it can be tied to a negative voltage rail.

5. IN+ B

Non-inverting input of channel B. Functionally identical to IN+ A, used for the second amplifier channel.

6. IN− B

Inverting input of channel B. This pin is used with external feedback components to define the gain and operating mode of channel B.

7. OUT B

Output of amplifier channel B. It delivers the amplified output signal with rail-to-rail swing capability.

8. V+

Positive supply pin. The device operates from a single supply voltage ranging from 2.7 V to 5 V, providing stable power for both amplifier channels.

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AD8552ARZ Features

l  Low offset voltage: 1 μV

l  Input offset drift: 0.005 μV/°C

l  Rail-to-rail input and output swing

l  5 V/2.7 V single-supply operation

l  High gain, CMRR, PSRR: 130 dB

l  Ultralow input bias current: 20 pA

l  Low supply current: 700 μA/op amp

l  Overload recovery time: 50 μs

l  No external capacitors required

AD8552ARZ Application Fields

Temperature Sensors

In applications involving thermistors, RTDs, and semiconductor temperature sensors, the AD8552ARZ accurately amplifies weak temperature-related signals while effectively suppressing offset and drift errors. This ensures stable and repeatable temperature measurements over a wide operating temperature range.

Pressure Sensors

Pressure sensors typically produce millivolt-level output signals, placing strict demands on an amplifier’s zero-drift performance. The zero-drift architecture of the AD8552ARZ significantly improves signal accuracy, making it well suited for pressure measurement systems in industrial control, automotive electronics, and process automation.

Precision Current Sensing

With rail-to-rail input and output capability, the AD8552ARZ can precisely amplify the small voltage drop across a shunt resistor. It is suitable for both high-side and low-side current sensing and is widely used in power management, battery monitoring, and energy efficiency evaluation systems.

Strain Gage Amplifiers

In weighing systems, mechanical testing, and structural monitoring applications, the AD8552ARZ provides stable amplification of strain gage signals. It greatly reduces temperature-induced drift errors, improving long-term reliability and measurement accuracy.

Medical Instrumentation

In vital-sign monitoring and diagnostic equipment, even minor signal errors can affect measurement results. The AD8552ARZ, with its low noise, low input bias current, and zero-drift characteristics, is ideally suited for high-precision analog front-end circuits in medical instrumentation.

Thermocouple Amplifiers

Thermocouples typically generate microvolt-level signals that are highly sensitive to amplifier offset and temperature drift. The AD8552ARZ effectively amplifies these small thermoelectric signals, minimizes errors caused by cold-junction temperature variations, and enhances overall temperature measurement accuracy.

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AD8552ARZ vs. AD8552ARZ-Reel7

In analog circuit design, the AD8552ARZ and AD8552ARZ-Reel7 are identical in terms of silicon and performance. The distinction lies entirely in the packaging method used for shipping and assembly.

1. Core Commonalities

Both versions share the exact same technical DNA:

l  Device Identity: Both are the AD8552, a dual, zero-drift, rail-to-rail input/output operational amplifier.Package

l  Type: Both use the 8-lead SOIC_N (Narrow Small Outline Integrated Circuit) package.

l  Electrical Specs: They feature an ultra-low offset voltage (typically 1μV), minimal temperature drift, and high open-loop gain.

l  Compliance: The "Z" suffix denotes that both are RoHS compliant (lead-free).

2. Key Differences

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AD8552ARZ Outline Dimensions 

The outline dimensions for the AD8552ARZ illustrate the specifications of the standard 8-lead SOIC package used for this device.

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