Part A
AD7243ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3805 PCS
- Package
- SOIC-16
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7243ARZ and AD7243AR are functionally equivalent 12-bit voltage-output DACs in the same 16-lead SOIC package, differing only in the lead-free (RoHS-compliant) finish of the ARZ suffix. The AD7243ARZ is a direct drop-in replacement for the AD7243AR in existing designs, with no change to electrical performance, pinout, or footprint required.
Resolution and DAC Architecture
High match
Package and Pinout
High match
Output Voltage Range
High match
RoHS and Lead Finish
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 | AD7243ARZ | AD7243AR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the number of discrete output levels; identical resolution means equivalent output granularity for substitution. |
| Number of DAC Channels | 1 | 1 | Channel count must match for the parts to be functionally interchangeable in a given circuit. |
| Output Type | Voltage (buffered) | Voltage (buffered) | Voltage vs current output determines compatibility with the downstream load and signal chain. |
| Supply Voltage | ±15 V (dual) | ±15 V (dual) | The supply rail requirement must match the host system for the device to operate correctly. |
| Package / Mounting | 20-SOIC (SMD) | 20-SOIC (SMD) | Package and mounting style must match for board-level drop-in compatibility. |
| RoHS Compliance | RoHS compliant (Z suffix) | Non-RoHS (legacy) | RoHS status affects regulatory compliance and solderability; the Z suffix denotes the lead-free variant. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment for reliable operation. |
| Interface | Serial (SPI-compatible) | Serial (SPI-compatible) | The digital interface must match the controller to allow direct communication without glue logic. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7243ARZ | AD7243AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | DACPORT® | DACPORT® |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 10µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI | SPI |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | ±10.8V ~ 16.5V | ±10.8V ~ 16.5V |
| INL / DNL(LSB) | ±1 (Max), ±0.9 (Max) | ±1 (Max), ±0.9 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between the AD7243ARZ and the AD7243AR?
The AD7243ARZ and AD7243AR are functionally identical 12-bit voltage-output DACs from Analog Devices. The primary difference is the suffix "Z," which denotes RoHS-compliant lead-free packaging for the AD7243ARZ, while the AD7243AR is the non-RoHS lead-frame version. Both are specified in a 16-lead SOIC package and share the same electrical specifications.
Are the AD7243ARZ and AD7243AR pin-compatible?
Yes. Both devices are offered in the same 16-lead SOIC (R-16) package with identical pin assignments, so they are pin-compatible and can be used on the same PCB land pattern.
Can the AD7243ARZ be used as a drop-in replacement for the AD7243AR?
Yes, in most cases. Because the two parts share the same die, package, pinout, and electrical specifications, the AD7243ARZ is a functional drop-in replacement for the AD7243AR. The only practical difference is RoHS compliance, which matters for regulatory and soldering-process requirements rather than circuit behavior.
What are the key specifications shared by the AD7243ARZ and AD7243AR?
Both are 12-bit voltage-output digital-to-analog converters with an on-chip output amplifier and reference. They operate from a single +5 V supply (with a +10 V reference input option) and provide a buffered voltage output. They feature a serial interface and are specified over the industrial temperature range. For exact grades and timing parameters, consult the Analog Devices AD7243 datasheet.
Does the "Z" suffix affect electrical performance?
No. The "Z" suffix in the AD7243ARZ designates RoHS-compliant, lead-free construction and does not change the device's electrical specifications. Both the AD7243ARZ and AD7243AR are specified to the same performance grades per the manufacturer datasheet.
Which part should be selected for a new RoHS-compliant design?
For new designs requiring RoHS compliance, the AD7243ARZ should be selected because it is the lead-free, RoHS-compliant variant. The AD7243AR is the non-RoHS version and is generally intended for legacy or exempt applications.
Are the AD7243ARZ and AD7243AR still available from distributors?
Availability varies by distributor and over time. The AD7243ARZ is the RoHS-compliant variant and is generally the more current ordering option, while the AD7243AR may have limited or obsolete stock. Check current stock and lifecycle status with authorized distributors such as DigiKey, Mouser, or Analog Devices before ordering.