Part A
AD8422ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3872 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8422ARZ-R7 and AD8422ARZ are functionally equivalent, sharing the same core amplifier die, package, and specified performance characteristics. The only distinction is the packaging format, with the -R7 suffix denoting tape-and-reel shipment versus the standard tube or tray configuration. Either part number can be used interchangeably in the same PCB footprint and application circuit, making the -R7 variant a valid functional replacement for the base AD8422ARZ when reel packaging is acceptable for the assembly process.
Package Type
High match
Amplifier Core Specifications
High match
Pin Configuration
High match
Operating Temperature Range
High match
Parts at a glance
Part B
AD8422ARZ-R7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3192 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8422ARZ-R7 | AD8422ARZ | Why it matters |
|---|---|---|---|
| Amplifier Type | Instrumentation Amplifier | Instrumentation Amplifier | Confirms both parts are the same functional device type, ensuring substitutability in the target circuit. |
| Number of Channels | 1 | 1 | Channel count must match for the parts to be interchangeable in single-channel signal conditioning designs. |
| Supply Voltage Range | 4.6 V to 36 V (±2.3 V to ±18 V) | 4.6 V to 36 V (±2.3 V to ±18 V) | Identical supply range ensures the parts operate in the same power environment without redesign. |
| Gain Range | 1 to 1000 (set by external resistor) | 1 to 1000 (set by external resistor) | Matching gain capability guarantees the same signal scaling behavior in the application. |
| Input Offset Voltage (max) | 70 µV | 70 µV | Offset voltage directly affects DC accuracy; identical values mean equivalent precision performance. |
| Gain Bandwidth Product | 2.2 MHz (G = 1) | 2.2 MHz (G = 1) | Bandwidth determines the maximum signal frequency the amplifier can handle; matching values ensure identical dynamic response. |
| Input Bias Current (max) | 1 nA | 1 nA | Low bias current minimizes errors in high-impedance sensor interfaces; identical values preserve accuracy. |
| Common Mode Rejection Ratio (CMRR) | 94 dB (G = 1) | 94 dB (G = 1) | CMRR determines rejection of common-mode noise; matching values ensure equivalent noise immunity. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings confirm both parts suit the same environmental conditions. |
| Package / Packaging | 8-Lead SOIC, Tape & Reel (R7) | 8-Lead SOIC, Tube | Same package footprint allows drop-in replacement, but packaging format differs, affecting assembly handling and inventory. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8422ARZ | AD8422ARZ-R7 |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.8V/µs | 0.8V/µs |
| -3 dB Bandwidth | 2.2 MHz | 2.2 MHz |
| Current - Input Bias | 500 pA | 500 pA |
| Voltage - Input Offset | 60 µV | 60 µV |
| Supply Current | 300µA | 300µA |
| Current - Output / Channel | 20 mA | 20 mA |
| Voltage - Supply Span(Min) | 4.6 V | 4.6 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AD8422ARZ-R7 and AD8422ARZ?
Both parts are the same AD8422 instrumentation amplifier in an 8-lead SOIC package (R-8 suffix). The difference is packaging format: AD8422ARZ-R7 is supplied in 7-inch reel packaging (typically 750 pieces per reel), while AD8422ARZ is supplied in tube packaging. The electrical specifications and die are identical.
Are AD8422ARZ-R7 and AD8422ARZ electrically identical?
Yes. Both order codes refer to the same AD8422ARZ device, which is a low power, high performance instrumentation amplifier with rail-to-rail output. The -R7 suffix only denotes reel packaging and does not change any electrical parameter.
Can AD8422ARZ-R7 be used as a drop-in replacement for AD8422ARZ?
Yes, provided the assembly process supports reel-fed pick-and-place. The package, pinout, and electrical performance are the same, so a design using AD8422ARZ can use AD8422ARZ-R7 without circuit changes. The only practical difference is the delivery format.
What package do AD8422ARZ-R7 and AD8422ARZ use?
Both are offered in the 8-lead SOIC package (R-8), with an operating temperature range of -40°C to +85°C. The package and pin configuration are identical between the two order codes.
Which part should be selected for high-volume automated assembly?
AD8422ARZ-R7 is the appropriate choice for high-volume automated assembly because it is supplied on a 7-inch reel compatible with standard pick-and-place equipment. AD8422ARZ in tubes is better suited to low-volume or manual assembly.
Do AD8422ARZ-R7 and AD8422ARZ differ in gain or bandwidth specifications?
No. Because both order codes refer to the same AD8422ARZ die, gain range, bandwidth, and other AC specifications are identical. Packaging format does not affect these parameters.
What is the reel quantity for AD8422ARZ-R7?
AD8422ARZ-R7 is supplied in 7-inch reel packaging with a standard quantity of 750 pieces per reel, as listed in the manufacturer's ordering guide. AD8422ARZ is supplied in tubes.