Part A
AD5308ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2931 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5308ARUZ and AD5306BRU are both quad 8-bit voltage-output DACs from Analog Devices in 16-lead TSSOP packages with similar supply and interface characteristics, making the AD5306BRU a viable functional replacement candidate for the AD5308ARUZ in many designs. However, the AD5308ARUZ integrates an on-chip reference and additional output range options, while the AD5306BRU requires an external reference, so designers must validate reference architecture and output configuration before substituting.
Resolution
High match
Channel Count
High match
Reference Architecture
Validation required
Package Type
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5308ARUZ | AD5306BRU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 4 | Channel count determines how many independent analog outputs are available, directly affecting whether one part can replace the other in a multi-channel design. |
| Resolution | 8 bits | 12 bits | Resolution sets the smallest output voltage step; a 12-bit DAC provides 16x finer granularity than an 8-bit DAC, which is critical for precision applications. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | I2C (2-wire) | The digital interface must match the host controller; SPI and I2C are not interchangeable without hardware or firmware changes. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Both parts operate over the same supply range, so power rail compatibility is maintained between the two devices. |
| Package / Mounting | 16-lead TSSOP | 16-lead TSSOP | Identical package and footprint allow a drop-in board layout substitution without PCB redesign. |
| Output Type | Voltage output (buffered) | Voltage output (buffered) | Both provide buffered voltage outputs, so the analog signal conditioning stage can remain the same. |
| Reference Input | External reference | External reference | Both require an external reference, so the reference circuitry and voltage scaling remain compatible. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Matching temperature ranges ensure both parts are suitable for the same industrial and automotive environments. |
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 | AD5308ARUZ | AD5306BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 8 | 8 |
| Number of D/A Converters | 8 | 4 |
| Settling Time | 8µs | 8µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | I²C |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.5V ~ 5.5V | 2.5V ~ 5.5V |
| Voltage - Supply, Digital | 2.5V ~ 5.5V | 2.5V ~ 5.5V |
| INL / DNL(LSB) | ±0.15, ±0.02 | ±0.15, ±0.02 |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 105°C |
Frequently asked questions
What are the main differences between the AD5308ARUZ and the AD5306BRU?
The AD5308ARUZ is an octal 8-bit DAC with a 2.5 V to 5.5 V supply range, SPI interface, and 16-lead TSSOP package. The AD5306BRU is a quad 8-bit DAC with a 2.5 V to 5.5 V supply range, I²C-compatible interface, and 16-lead TSSOP package. The primary differences are channel count (8 vs 4) and digital interface (SPI vs I²C).
Are the AD5308ARUZ and AD5306BRU pin-compatible?
No. Although both devices are offered in 16-lead TSSOP packages, their pin functions differ due to different channel counts and interface types. The AD5308ARUZ uses SPI pins, while the AD5306BRU uses I²C-compatible pins. A direct PCB drop-in replacement is not possible without layout changes.
Can the AD5308ARUZ and AD5306BRU operate from the same supply voltage?
Yes. Both devices are specified for a supply voltage range of 2.5 V to 5.5 V, allowing them to operate from common system rails such as 3.3 V or 5 V.
What is the resolution and channel count of each device?
The AD5308ARUZ provides eight 8-bit voltage output DACs. The AD5306BRU provides four 8-bit voltage output DACs. Both have 8-bit resolution.
Do the AD5308ARUZ and AD5306BRU have the same digital interface?
No. The AD5308ARUZ uses a serial peripheral interface (SPI) compatible with standard SPI, QSPI, MICROWIRE, and DSP interface standards. The AD5306BRU uses a 2-wire I²C-compatible serial interface that supports standard and fast modes.
Are the AD5308ARUZ and AD5306BRU available in the same package type?
Both devices are available in a 16-lead TSSOP package. However, the AD5308ARUZ is also offered in a 16-lead LFCSP package, while the AD5306BRU is offered in a 16-lead TSSOP package. Package options should be verified against the specific ordering part number.
What are the typical applications for the AD5308ARUZ and AD5306BRU?
Both devices are used in portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators. The AD5308ARUZ is suited for applications requiring more DAC channels, while the AD5306BRU is suited for space-constrained designs needing fewer channels with an I²C interface.