Analog Devices Inc. AD22050RZ-REEL

Overview

AD22050RZ-REEL from Analog Devices is a single-supply difference amplifier optimized for high-accuracy amplification and low-pass filtering of small differential signals (e.g., 100 mV FS) in the presence of large common-mode voltages up to +24 V with +5 V supply. It features laser-trimmed input attenuator, default ×20 gain, 30 kHz bandwidth, 90 dB CMRR at DC, and midscale offset capability via Pin 7. Used in automotive current sensing and strain gage interfaces.

For engineers reviewing the AD22050RZ-REEL datasheet, AD22050RZ-REEL pinout, AD22050RZ-REEL application, or AD22050RZ-REEL equivalent, key selection criteria include common-mode input range (–1 V to +24 V), differential input resistance (400 kΩ), output swing to 20 mV above ground, single/dual/triple-pole filter configurability, and ±0.5% factory-trimmed gain accuracy.

Technical Context

The AD22050RZ-REEL integrates a precision resistive attenuator (6× attenuation ratio), low-drift preamplifier A1 (×10 closed-loop gain), and output buffer A2 (×2 gain), forming a monolithic signal chain with total default gain ×20. Its input stage supports common-mode voltages exceeding the supply rail by leveraging laser-trimmed R1–R4 network, enabling operation with V_CM up to (V_S – 1 V) × 6.

Internal 100 kΩ trimmed resistor (R12) between Pins 3 and 4 enables configurable low-pass filtering (1-, 2-, or 3-pole), while Pin 7 (OFS) provides accurate 0.5× scaling of an external reference to set midscale output offset-critical for bipolar signal conditioning without dual supplies.

Key Specifications

Pinout & Package

AD22050RZ-REEL is housed in an 8-lead plastic SOIC package (SO-8), RoHS-compliant, tape-and-reel format (2,500 units per reel). Pin numbering follows standard SOIC top-view convention with Pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar difference amplifier applications.

Compared with INA128UA and AD8210YRZ, AD22050RZ-REEL uniquely combines extended CMR (–1 V to +24 V), integrated midscale offset, and user-configurable low-pass filtering - making it the only option among the three qualified for automotive solenoid current sensing with bipolar signal compatibility and EMI-hardened design.

Availability

AD22050RZ-REEL is available at Aetrix Electronics and suitable for automotive current sensing, industrial motor control, strain gage interfacing, and pressure transducer signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD22050RZ-REEL 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 Wilmington, MA, serving industrial, automotive, communications, and healthcare markets.

The AD22050RZ-REEL belongs to Analog Devices' precision sensor interface amplifier product line, engineered specifically for single-supply amplification of low-level transducer signals in electrically noisy, high-common-mode-voltage environments such as automotive powertrain and industrial motion control.

FAQ

What is the maximum common-mode voltage the AD22050RZ-REEL can handle with a +5 V supply?

The AD22050RZ-REEL supports an input common-mode voltage range of –1.0 V to +24 V when operated with a +5 V supply. This is achieved via its internal 6× resistive attenuator, allowing it to interface directly with battery-positive shunt configurations in automotive systems where common-mode voltage may exceed the supply rail - a capability confirmed in the Absolute Maximum Ratings and Specifications tables of the official AD22050 datasheet Rev. C.

Can the AD22050RZ-REEL drive a 10 kΩ load to full output swing?

Yes, the AD22050RZ-REEL can drive a 10 kΩ load to its full output voltage range of +0.02 V to +4.8 V with +5 V supply. Its output buffer A2 has a specified output resistance of 2.0 Ω and short-circuit current capability of 7–25 mA, ensuring robust loading performance. The datasheet confirms stable operation into 10 kΩ loads across the full temperature range (–40°C to +125°C), with output swing degrading less than 10 mV at full scale under this condition.

How is the midscale offset feature implemented on the AD22050RZ-REEL?

The AD22050RZ-REEL implements midscale offset via Pin 7 (OFS), which accepts an external reference voltage (e.g., +V_S/2) and scales it with 0.50 ± 0.01 V/V accuracy to set the output's DC bias point. When Pin 7 is tied to +5 V, the output centers at 2.5 V - enabling bipolar input signals (e.g., ±10 mV bridge output) to produce a unipolar 1.5 V–3.5 V output. This function is internally trimmed and does not require external components, as verified in the Product Description and Strain Gage Interface sections of the AD22050 datasheet.

Does the AD22050RZ-REEL support configurable low-pass filtering, and how is it implemented?

Yes, the AD22050RZ-REEL supports 1-, 2-, or 3-pole low-pass filtering. A single-pole filter is formed by connecting Pin 3 (A1 output) to Pin 4 (A2 input) and adding a capacitor from that node to ground (Figure 6). Two-pole (Sallen-Key) and three-pole variants use additional external resistors and capacitors as shown in Figures 7 and 9. Corner frequencies scale linearly with capacitance (e.g., 1.59 Hz·µF for 1-pole), and all configurations retain the device's factory-trimmed gain accuracy - details confirmed in the Low-Pass Filtering section of the AD22050 datasheet Rev. C.

What is the guaranteed gain accuracy of the AD22050RZ-REEL, and is it temperature-stable?

The AD22050RZ-REEL has a guaranteed overall gain accuracy of 20.0 ± 0.5% at +25°C, with over-temperature variation specified as 19.8 to 20.2 across –40°C to +125°C. This tight tolerance results from laser trimming of internal resistors and is explicitly documented in the "Overall System" table under "G Gain" in the AD22050–SPECIFICATIONS Rev. C. No external calibration is required for most precision applications, and gain drift remains below ±0.1% over full temperature range.