AD8422ARMZ-RL Equivalent & Substitute Parts

Part Overview

The AD8422ARMZ-RL is an instrumentation amplifier manufactured by Analog Devices Inc., designed for single-circuit rail-to-rail signal conditioning applications. This linear amplifier operates across a wide supply voltage range of 4.6 V to 36 V and is housed in an 8-MSOP surface mount package. The device is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of the instrumentation amplifier category. Alternative devices may be required due to packaging availability, supply chain considerations, or specific application requirements within the defined parameter envelope.

Substiute Parts

AD8422ARMZ-RL

Analog Devices Inc.In Stock: 856AD8422ARMZ-RL Datasheet

Current PartRFQ

INA826AIDGK

Texas InstrumentsIn Stock: 2871INA826AIDGK Datasheet

SimilarRFQ

INA826AIDGKR

Texas InstrumentsIn Stock: 25121INA826AIDGKR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8422ARMZ-RL is determined by equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: Instrumentation
• Number of Circuits: 1
• Output Type: Rail-to-Rail
• Mounting Type: Surface Mount
• Package compatibility: 8-pin surface mount configuration

Electrical Performance Envelope:

• Supply voltage range must encompass or exceed the minimum 4.6 V requirement
• Output current capability must meet or exceed 20 mA per channel
• Input bias current and input offset voltage must be within acceptable limits for the application
• Bandwidth and slew rate define signal fidelity characteristics

Compliance & Environmental:

• RoHS3 compliance required
• Operating temperature range must support -40°C to 85°C minimum
• REACH compliance status must be unaffected

The identified substitute parts INA826AIDGK and INA826AIDGKR (Texas Instruments) meet these functional and electrical criteria within the instrumentation amplifier category, with variations in packaging format and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

AD8422ARMZ-RL (Primary Device)

The AD8422ARMZ-RL remains the specified component with active product status and full RoHS3 compliance. This device features a higher bandwidth of 2.2 MHz and greater output current capability of 20 mA per channel. The MSL rating of 1 (Unlimited) provides superior moisture tolerance for extended storage and handling. Supply voltage minimum of 4.6 V accommodates applications requiring higher minimum operating voltage.

INA826AIDGK (Substitute - Tube Packaging)

The INA826AIDGK is functionally equivalent within the instrumentation amplifier category with active product status and RoHS3 compliance. This device operates across a lower minimum supply voltage of 2.7 V, extending applicability to lower-voltage systems. The extended operating temperature range of -40°C to 125°C provides thermal margin beyond the primary device. Output current is rated at 16 mA per channel. Packaging is supplied in Tube format. MSL rating of 2 (1 Year) requires standard moisture control during storage and assembly.

INA826AIDGKR (Substitute - Cut Tape & Digi-Reel® Packaging)

The INA826AIDGKR is functionally equivalent with identical electrical specifications to the INA826AIDGK. This variant is supplied in Cut Tape and Digi-Reel® packaging format with significantly higher inventory availability (25,100 pcs). Product status is active with full RoHS3 compliance. Selection of this variant is appropriate when packaging format and supply chain availability are primary considerations within the defined electrical parameter envelope.

Compliance & Regulatory Status

All three devices maintain ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the INA826AIDGK or INA826AIDGKR directly replace the AD8422ARMZ-RL in existing designs?

A: Direct replacement requires verification of three specific parameters: (1) Output current requirement—the INA826 series provides 16 mA per channel versus 20 mA for the AD8422ARMZ-RL; (2) Bandwidth requirement—the AD8422ARMZ-RL provides 2.2 MHz versus 1 MHz for the INA826 series; (3) Minimum supply voltage—the INA826 series operates at 2.7 V minimum versus 4.6 V for the AD8422ARMZ-RL. If the application requires all three of these specifications at their maximum values, the AD8422ARMZ-RL is the only suitable device among these options.

Q: What is the difference between INA826AIDGK and INA826AIDGKR?

A: Both devices are electrically identical with the same specifications and performance characteristics. The primary difference is packaging format: INA826AIDGK is supplied in Tube packaging, while INA826AIDGKR is supplied in Cut Tape and Digi-Reel® format. The INA826AIDGKR has significantly higher inventory availability (25,100 pcs versus 2,851 pcs). Selection between these variants depends on assembly process requirements and supply chain logistics.

Q: Are there package compatibility considerations between these devices?

A: All three devices are housed in 8-pin surface mount packages with 0.118" (3.00mm) width. The AD8422ARMZ-RL uses 8-MSOP package format, while the INA826 variants use 8-VSSOP package format. Both package types are compatible with standard 8-pin surface mount assembly processes. Physical footprint compatibility should be verified against specific PCB layout requirements.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating difference?

A: The AD8422ARMZ-RL has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. The INA826 variants have MSL 2 (1 Year), requiring standard moisture control measures including dry storage and desiccant packaging. For applications with extended storage periods or high-humidity environments, the AD8422ARMZ-RL provides superior moisture tolerance.

Q: How do the input bias current specifications compare?

A: The AD8422ARMZ-RL specifies 500 pA input bias current, while the INA826 variants specify 35 nA. The INA826 series exhibits significantly higher input bias current (approximately 70 times greater). For applications requiring ultra-low input bias current, the AD8422ARMZ-RL is the appropriate selection.

Q: What operating temperature range should be considered for system design?

A: The AD8422ARMZ-RL operates from -40°C to 85°C. The INA826 variants operate from -40°C to 125°C, providing extended high-temperature capability. System thermal design requirements determine whether the extended upper temperature limit of the INA826 series provides operational advantage.