Part A
AD7390ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3323 PCS
- Package
- SOIC-8
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7392AR is a functionally compatible replacement candidate for the AD7390ARZ, sharing the same 12-bit DAC architecture, serial interface, and SOIC-8 footprint, though the two devices differ in reference configuration and supply voltage range, so validation against the target design's reference and power scheme is advised before substitution.
Resolution
High match
Package Type
High match
Reference Configuration
Validation required
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD7392AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 359 PCS
- Package
- SOIC-20
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
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 | AD7392AR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both are 12-bit DACs, so resolution is identical and does not affect substitutability. |
| Number of DAC Channels | 1 | 1 | Single-channel architecture in both parts; channel count matches for direct replacement. |
| Interface Type | SPI (3-wire serial) | SPI (3-wire serial) | Both use a 3-wire serial interface, so the host microcontroller connection is compatible. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical supply range allows operation in the same low-voltage systems. |
| Output Type | Voltage output | Voltage output | Both provide buffered voltage outputs, so downstream signal conditioning is unchanged. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Same package and footprint enable drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure equivalent environmental performance. |
| Reference Input | External reference | External reference | Both require an external reference, so the reference circuit can be reused. |
| Power-On Reset | Yes (to zero scale) | Yes (to zero scale) | Both reset to zero scale at power-up, giving predictable startup behavior. |
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 | AD7390ARZ | AD7392AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 70µs (Typ) | 70µs (Typ) |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI | Parallel |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| INL / DNL(LSB) | ±2 (Max), ±1 (Max) | ±3 (Max), ±1 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7390ARZ and AD7392AR?
The AD7390ARZ is a 12-bit voltage-output DAC, while the AD7392AR is a 12-bit current-output DAC. The AD7390ARZ provides a buffered voltage output, whereas the AD7392AR requires an external op-amp for current-to-voltage conversion. Both are single-channel, serial-input DACs in SOIC packages, but they differ in output architecture and therefore in typical application circuits.
Are the AD7390ARZ and AD7392AR pin-compatible?
No. Although both are offered in 8-lead SOIC packages, their pin functions differ because the AD7390ARZ has a voltage output (VOUT) and the AD7392AR has a current output (IOUT). The pin assignments are not interchangeable, so the PCB layout must be designed specifically for each part.
What is the resolution and interface of both devices?
Both the AD7390ARZ and AD7392AR are 12-bit DACs with a serial (SPI-compatible) digital interface. They accept a serial data word to set the DAC register and are intended for microprocessor-controlled systems requiring moderate-resolution analog output.
Can the AD7392AR directly replace the AD7390ARZ in an existing design?
No, not without circuit changes. The AD7390ARZ delivers a buffered voltage output, while the AD7392AR delivers a current output that requires an external operational amplifier to produce a voltage. The output stage, feedback network, and PCB layout must be redesigned accordingly.
What supply voltage do the AD7390ARZ and AD7392AR require?
Both devices operate from a single +2.7 V to +5.5 V supply, making them suitable for low-voltage, single-supply systems. Designers should verify the exact supply range against the respective manufacturer datasheet for the specific grade and package.
Which part is better for a voltage-output control loop?
The AD7390ARZ is the more direct choice for a voltage-output control loop because it integrates a buffered voltage output stage. The AD7392AR would require an external op-amp and associated components to convert its current output to a usable voltage, adding board area and design complexity.
Do both parts come in the same package type?
Both the AD7390ARZ and AD7392AR are available in 8-lead SOIC packages (the "R" suffix in the AD7392AR and the "ARZ" suffix in the AD7390ARZ indicate SOIC). However, package similarity does not imply pin or functional compatibility, so each requires its own layout and external circuitry.