Part A
AD7390ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3323 PCS
- Package
- SOIC-8
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7390ARZ and AD7393AR are both 12-bit voltage-output DACs from Analog Devices in a 14-lead SOIC package, sharing the same supply range and serial interface family, so the AD7393AR can serve as a functional replacement candidate for the AD7390ARZ. However, the two parts differ in reference architecture and output amplifier configuration, so the replacement is not a pin-for-pin drop-in and requires validation of the reference and output-stage requirements in the target design.
Resolution
High match
Package Type
High match
Reference Architecture
Validation required
Output Amplifier Configuration
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 | AD7390ARZ | AD7393AR | Why it matters |
|---|---|---|---|
| Resolution | 12 bits | 10 bits | Resolution determines the number of discrete output levels; a 12-bit DAC offers 4x finer granularity than a 10-bit DAC, affecting precision of the analog output. |
| Number of DAC Channels | 1 | 1 | Both are single-channel DACs, so channel count is not a differentiator for substitutability. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply range allows either part to operate in the same low-voltage system without redesign of the power rail. |
| Output Type | Voltage output | Voltage output | Both provide buffered voltage outputs, so the downstream signal conditioning topology can remain unchanged. |
| Interface | SPI-compatible serial (3-wire) | SPI-compatible serial (3-wire) | Matching serial interface means the same microcontroller pins and firmware protocol can drive either device. |
| Package | 8-lead SOIC | 8-lead SOIC | Identical package and pinout allow drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range ensures both parts meet the same environmental requirements. |
| Integral Nonlinearity (INL) | ±1 LSB (typ) | ±0.5 LSB (typ) | INL affects absolute accuracy; the 10-bit part specifies tighter LSB linearity, though the 12-bit part achieves finer absolute resolution. |
| Settling Time | 6 µs (typ) | 6 µs (typ) | Equivalent settling time means dynamic response and update rate are comparable between the two parts. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7390ARZ | AD7393AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | - |
| Number of D/A Converters | 1 | - |
| Settling Time | 70µs (Typ) | - |
| Output Type | Voltage - Buffered | - |
| Differential Output | No | - |
| Data Interface | SPI | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | - |
| INL / DNL(LSB) | ±2 (Max), ±1 (Max) | - |
| Architecture | R-2R | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the AD7390ARZ and AD7393AR?
The AD7390ARZ is a 12-bit voltage-output DAC, while the AD7393AR is a 12-bit current-output DAC. The AD7390ARZ integrates an output buffer amplifier and provides a voltage output, whereas the AD7393AR provides a current output requiring an external op-amp for voltage conversion. Both are single-channel DACs in 8-lead SOIC packages and operate from a single 3 V to 5 V supply.
Are the AD7390ARZ and AD7393AR pin-compatible?
No. Although both are offered in 8-lead SOIC packages, their pin functions differ because the AD7390ARZ provides a buffered voltage output (VOUT) while the AD7393AR provides a current output (IOUT). The pin assignments are not interchangeable, so the PCB layout must be designed for the specific device.
What is the resolution and interface type of both devices?
Both the AD7390ARZ and AD7393AR are 12-bit DACs with a serial SPI-compatible interface. They accept a 3-wire serial data input and are suitable for microcontroller-based systems requiring digital-to-analog conversion.
What supply voltage range do the AD7390ARZ and AD7393AR support?
Both devices operate from a single supply voltage of 3 V to 5 V, making them suitable for low-power and portable applications. The specified operating temperature range for the ARZ/AR grades is −40 °C to +85 °C.
Can the AD7393AR be used as a drop-in replacement for the AD7390ARZ?
No. The AD7393AR is a current-output DAC and requires an external op-amp to produce a voltage output, while the AD7390ARZ has an integrated output buffer. A direct drop-in replacement is not possible without circuit redesign and validation against the manufacturer datasheet.
What are the package options for the AD7390ARZ and AD7393AR?
Both the AD7390ARZ and AD7393AR are available in 8-lead SOIC packages. The "ARZ" and "AR" suffixes denote the SOIC package and grade; the "Z" suffix on the AD7390ARZ indicates RoHS-compliant lead-free construction.
Which device is better for a design requiring a direct voltage output?
The AD7390ARZ is the appropriate choice because it integrates an output buffer amplifier and provides a voltage output directly. The AD7393AR provides a current output and would require an external op-amp and additional components to generate a voltage signal.