Part A
AD8042AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4001 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8042ARZ and AD8042AR are functionally equivalent dual operational amplifiers from the same manufacturer family, sharing identical core electrical specifications. The AD8042ARZ is the RoHS-compliant, lead-free package variant of the AD8042AR, making it a suitable functional replacement candidate where environmental compliance is required, while the AD8042AR remains appropriate for legacy designs specifying the leaded SOIC package.
Amplifier Core Specifications
High match
Package Type
High match
Pin Configuration
High match
Environmental Compliance
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8042ARZ | AD8042AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count matches for direct substitution. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable gain. |
| Slew Rate | 225 V/µs | 225 V/µs | Slew rate limits how fast the output can respond to large signal swings. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | The supply range must cover the system rail voltages for the part to operate correctly. |
| Input Offset Voltage (max) | 6 mV | 6 mV | Offset voltage affects DC accuracy and error in precision signal chains. |
| Input Bias Current | 1.4 µA | 1.4 µA | Bias current influences error, especially with high source impedances. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must match the application environment for reliable operation. |
| Package / Mounting | 8-SOIC (RoHS-compliant, Pb-free) | 8-SOIC (leaded, non-RoHS) | The Z suffix denotes RoHS compliance; the leaded version may not meet environmental/regulatory requirements. |
| RoHS Compliance | Yes | No | RoHS status affects regulatory compliance and solderability in modern assemblies. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8042AR | AD8042ARZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 225V/µs | 225V/µs |
| Gain Bandwidth Product | 90 MHz | 90 MHz |
| -3 dB Bandwidth | 170 MHz | 170 MHz |
| Current - Input Bias | 1.2 µA | 1.2 µA |
| Voltage - Input Offset | 3 mV | 3 mV |
| Supply Current | 6mA (x2 Channels) | 6mA (x2 Channels) |
| Current - Output / Channel | 50 mA | 50 mA |
| Voltage - Supply Span(Min) | 3 V | 3 V |
| Voltage - Supply Span(Max) | 12 V | 12 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 the AD8042ARZ and the AD8042AR?
The AD8042ARZ is the RoHS-compliant, lead-free (Pb-free) version of the AD8042AR. Both are dual, low-power, high-speed operational amplifiers from Analog Devices in an 8-lead SOIC package. The "Z" suffix in AD8042ARZ denotes the RoHS-compliant packaging option, while AD8042AR is the non-RoHS (leaded) version. Electrically, both parts share the same datasheet specifications.
Are the AD8042ARZ and AD8042AR electrically identical?
Yes. Both variants are specified under the same Analog Devices AD8042 datasheet and share identical electrical parameters, including 160 MHz unity-gain bandwidth, 225 V/µs slew rate, and 5.5 mA typical supply current per amplifier. The only documented difference is the RoHS/lead-free status of the package finish.
Can the AD8042ARZ be used as a direct drop-in replacement for the AD8042AR?
Yes, in most cases. Both parts use the same 8-lead SOIC (R-8) package with identical pinout and footprint. The AD8042ARZ is the RoHS-compliant replacement, so it can be substituted directly in designs where lead-free/RoHS compliance is required or acceptable, provided the board assembly process supports Pb-free soldering.
What is the package and pinout of the AD8042ARZ and AD8042AR?
Both devices are offered in an 8-lead SOIC package (R-8 suffix). The pinout is identical: pin 1 = OUT1, pin 2 = -IN1, pin 3 = +IN1, pin 4 = V-, pin 5 = +IN2, pin 6 = -IN2, pin 7 = OUT2, pin 8 = V+. This shared pinout supports direct substitution between the two variants.
What are the key performance specifications of the AD8042?
Per the Analog Devices AD8042 datasheet, the device offers 160 MHz unity-gain bandwidth, 225 V/µs slew rate, 0.1 dB flatness to 30 MHz, 5.5 mA typical supply current per amplifier, and operates on supplies from 3 V to 12 V. It is a dual voltage-feedback op amp suited for video and high-speed signal processing.
Does the "Z" suffix affect the operating temperature range or reliability?
No. The "Z" suffix in AD8042ARZ indicates RoHS compliance (lead-free package finish), not a change in temperature grade or reliability specification. Both AD8042ARZ and AD8042AR are specified over the industrial temperature range of -40°C to +85°C per the AD8042 datasheet.
Which variant should be selected for a new RoHS-compliant design?
The AD8042ARZ should be selected for new designs requiring RoHS compliance, as it is the lead-free, RoHS-compliant package option. The AD8042AR (non-RoHS) is generally intended for legacy designs or applications where leaded package finishes are still permitted.