Part A
AD7390ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3323 個数
- Package
- SOIC-8
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7396AR is a functionally compatible replacement candidate for the AD7390ARZ, sharing the same 12-bit DAC resolution, serial interface, and voltage output architecture, though the two devices differ in channel count and package footprint, so validation of the multi-channel configuration and board layout is required before substitution.
Resolution
High match
Output Type
High match
Channel Count
Validation required
Package Type
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 | AD7396AR | 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 | 2 | Channel count differs; a single-channel part cannot directly replace a dual-channel part in multi-channel designs. |
| Digital Interface | SPI (3-wire serial) | Parallel | Interface type is fundamentally different, requiring different host controller wiring and firmware. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both support the same supply range, so power rail compatibility is maintained. |
| Output Type | Voltage output | Voltage output | Both provide voltage outputs, so the downstream signal conditioning topology is compatible. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Different package footprints and pin counts prevent drop-in board replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean environmental compatibility is preserved. |
| Settling Time | 6 µs (typical) | 6 µs (typical) | Matching settling times indicate comparable dynamic performance for control-loop applications. |
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 | AD7396AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 2 |
| 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) | ±2 (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 AD7396AR?
The AD7390ARZ is a single-channel 12-bit voltage-output DAC in an 8-lead SOIC package, while the AD7396AR is a dual-channel 12-bit voltage-output DAC in a 14-lead SOIC package. The AD7390ARZ provides one DAC output, whereas the AD7396AR integrates two independent DACs in a single package, making it suitable for applications requiring multiple voltage outputs.
Are the AD7390ARZ and AD7396AR pin-compatible?
No. The AD7390ARZ uses an 8-lead SOIC (R-8) package, while the AD7396AR uses a 14-lead SOIC (R-14) package. The different pin counts and pin assignments mean they are not drop-in replacements for each other and require different PCB footprints.
What is the resolution and architecture of these DACs?
Both the AD7390ARZ and AD7396AR are 12-bit voltage-output digital-to-analog converters. The AD7390ARZ is a single 12-bit DAC, and the AD7396AR contains two 12-bit DACs. Both devices are designed for single-supply or dual-supply operation with a voltage output configuration.
What supply voltage range do the AD7390ARZ and AD7396AR support?
Both devices operate from a single supply of +2.7 V to +5.5 V, and they also support dual-supply operation. The wide supply range allows use in both 3 V and 5 V systems. Designers should confirm the exact supply limits in the respective manufacturer datasheets before finalizing the power design.
How do the digital interfaces of the AD7390ARZ and AD7396AR differ?
Both parts use a serial digital interface for loading DAC data. The AD7390ARZ has a single DAC latch and serial input, while the AD7396AR includes two DAC registers and associated control logic to address and update either channel independently. The interface timing and control signals should be verified against each datasheet.
Can the AD7396AR replace the AD7390ARZ in an existing design?
Not directly. Although both are 12-bit voltage-output DACs, the AD7396AR is a dual-channel device in a 14-lead package, while the AD7390ARZ is a single-channel device in an 8-lead package. A replacement would require PCB layout changes, updated control firmware for the second channel, and verification of pin functions and timing.
What are typical applications for the AD7390ARZ and AD7396AR?
These DACs are typically used in applications such as digital gain and offset adjustment, programmable voltage and current sources, automatic test equipment, and industrial control systems. The AD7390ARZ suits single-output needs, while the AD7396AR suits designs requiring two independently programmable voltage outputs.
What package types are used for the AD7390ARZ and AD7396AR?
The AD7390ARZ is supplied in an 8-lead SOIC package (R-8 suffix), and the AD7396AR is supplied in a 14-lead SOIC package (R-14 suffix). Both are surface-mount packages, but the different lead counts and body widths require distinct PCB land patterns.