Analog Devices Inc. AD22057R-REEL

Overview

AD22057R-REEL from Analog Devices is a single-supply, precision difference amplifier optimized for high-common-mode-voltage sensor signal conditioning. It features laser-trimmed 400 kΩ differential input resistance, fixed ×20 gain (±0.5%), 80–90 dB CMRR at DC–1 kHz, –40°C to +125°C operation, and integrated RFI filtering - enabling accurate amplification of ±100 mV differential signals in automotive current sensing applications with up to +24 V common-mode voltage on a +5 V supply.

For engineers reviewing the AD22057R-REEL datasheet, AD22057R-REEL pinout, AD22057R-REEL application, or AD22057R-REEL equivalent, key selection criteria include its 20 mV to (VS – 0.2) V output swing, ±1 mV input offset voltage, 20–30 kHz bandwidth, midscale offset capability via Pin 7, and SOIC-8 package compatibility with industrial motor control and transducer interface designs requiring rail-to-rail output and transient-protected inputs.

Technical Context

The AD22057R-REEL integrates a precision resistive attenuator (Pins 1/8), low-drift preamplifier A1 (×10 closed-loop gain, trimmed to ±3%), and unity-gain-stable output buffer A2 (×2 gain), forming a monolithic, calibrated ×20 system. Its input attenuator extends the common-mode range to –1 V to +24 V on +5 V supply by scaling CM voltage 6× before A1.

Internal 100 kΩ trimmed resistor between Pins 3 and 4 enables configurable 1-/2-/3-pole low-pass filtering; midscale offset is implemented via Pin 7 (OFS), where 0.49–0.51 V/V scaling sets output midpoint relative to applied reference - supporting bipolar signal conditioning without dual supplies.

Key Specifications

Pinout & Package

AD22057R-REEL is housed in an 8-lead SOIC (R-8) package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Pin 1 is marked with a dot; device is ESD-sensitive (HBM 4000 V).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA128UA and AD8210YRZ, AD22057R-REEL uniquely combines wide common-mode range (–1 V to +24 V on +5 V), factory-calibrated ×20 gain, integrated midscale offset, and transient-hardened inputs - making it the only option among the three qualified for automotive solenoid current sensing with bipolar output and no external protection components.

Availability

AD22057R-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 and voltage ranges.

Supply support for AD22057R-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD22057R-REEL belongs to Analog Devices' precision sensor interface amplifier product line, designed specifically for single-supply, high-common-mode-voltage signal conditioning in automotive, industrial, and transducer applications where reliability, accuracy, and ruggedness are critical.

FAQ

What is the absolute maximum common-mode voltage the AD22057R-REEL can handle on a +5 V supply?

The AD22057R-REEL supports a common-mode input range from –1.0 V to +24 V when operated on a +5 V supply, enabled by its internal 6× resistive attenuator. This allows direct connection to shunt resistors referenced to battery or chassis potentials exceeding the supply rail - a key capability confirmed in the Absolute Maximum Ratings and Specifications tables for AD22057R-REEL.

Can the AD22057R-REEL drive a 10 kΩ load to full scale with ±1% linearity?

Yes. The AD22057R-REEL is specified to drive ≥10 kΩ loads over its full output range (20 mV to VS – 0.2 V) with guaranteed linearity and gain accuracy. At VS = +5 V, it delivers 0.02 V to 4.8 V into 10 kΩ with ≤0.1% gain error and <±1 mV offset - meeting ±1% total error budget for precision sensor interfaces using AD22057R-REEL.

How does the midscale offset feature work on the AD22057R-REEL, and what is its accuracy?

The AD22057R-REEL's midscale offset is controlled via Pin 7 (OFS), which scales the output midpoint to 0.49–0.51× the voltage applied to that pin. When +5 V is applied to Pin 7, the output centers at +2.5 V ±2%, enabling bipolar signal conditioning. This 2% accuracy is laser-trimmed and guaranteed across temperature - a core specification documented for AD22057R-REEL in the "OFS" parameter row.

Is the AD22057R-REEL suitable for driving a microcontroller ADC with charge-redistribution architecture?

Yes, but requires external R-C snubber compensation. Due to its high open-loop output impedance, AD22057R-REEL exhibits charge injection errors when driving CMOS ADCs. Figure 15 in the datasheet recommends a 1 kΩ + 0.01 µF lag network at the output - reducing effective output impedance and confining settling time to ~10 µs, ensuring reliable sampling for AD22057R-REEL in MCU-based systems.

What is the default bandwidth and slew rate of the AD22057R-REEL, and how do they affect PWM current sensing?

The AD22057R-REEL has a –3 dB bandwidth of 20–30 kHz and slew rate of 0.2 V/µs. These values support accurate reconstruction of motor phase currents with PWM frequencies up to 10 kHz and duty-cycle modulation, while suppressing switching noise above 20 kHz. Bandwidth is preserved across gain adjustments - a key design attribute verified in the AD22057R-REEL specifications table.