Part A
AD5318ARU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1529 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5318ARUZ and AD5318ARU are functionally equivalent octal 10-bit DACs sharing identical core specifications, with the ARUZ suffix denoting a RoHS-compliant package variant. Both parts are interchangeable in existing designs, though the AD5318ARUZ is preferred for new production due to its lead-free compliance.
Resolution
High match
Channel Count
High match
Package Type
High match
RoHS Compliance
Validation required
Parts at a glance
Part B
AD5318ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5741 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital to Analog Converters (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 | AD5318ARUZ | AD5318ARU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 8 | Channel count determines how many independent analog outputs the device can drive in a system. |
| Resolution | 10 bits | 10 bits | Resolution sets the smallest analog output step and directly affects output precision. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | The supply range must match the system rail to ensure proper operation and output swing. |
| Interface Type | SPI / DSP / Microwire compatible | SPI / DSP / Microwire compatible | The digital interface must be compatible with the host controller for communication. |
| Output Type | Voltage buffered | Voltage buffered | Buffered voltage outputs simplify driving loads without external amplifiers. |
| Package / Mounting | 16-Lead TSSOP | 16-Lead TSSOP | Package and mounting type must match the PCB footprint for direct substitution. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Non-RoHS, contains lead | RoHS compliance affects regulatory acceptance and solder process compatibility in many markets. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | The temperature range must cover the application environment for reliable operation. |
| Reference Input | External | External | External reference allows the output range to be scaled and matched to system requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5318ARU | AD5318ARUZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Number of Bits | 10 | 10 |
| Number of D/A Converters | 8 | 8 |
| Settling Time | 9µs | 9µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | SPI, DSP |
| 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) | ±0.5, ±0.05 | ±0.5, ±0.05 |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the difference between the AD5318ARUZ and the AD5318ARU?
The AD5318ARUZ and AD5318ARU are functionally identical 8-channel, 10-bit digital-to-analog converters from Analog Devices. The primary difference is the package and ordering suffix: the AD5318ARUZ is a lead-free, RoHS-compliant version in a 16-lead TSSOP package, while the AD5318ARU is the non-RoHS version of the same device in the same 16-lead TSSOP package.
Are the AD5318ARUZ and AD5318ARU pin-compatible?
Yes. Both devices are offered in the same 16-lead TSSOP package and share the same pinout. The only difference is the RoHS compliance status indicated by the "Z" suffix on the AD5318ARUZ.
Can the AD5318ARUZ be used as a direct drop-in replacement for the AD5318ARU?
Yes, in most cases. Because both parts have identical electrical specifications, package dimensions, and pinout, the AD5318ARUZ can directly replace the AD5318ARU. However, the AD5318ARUZ is lead-free and RoHS-compliant, so solder reflow profiles may need to be adjusted to match the higher melting point of lead-free solder.
What are the key specifications of the AD5318ARUZ and AD5318ARU?
Both devices are 10-bit, 8-channel voltage-output DACs with a 2.5 V to 5.5 V supply range, a 30 MHz SPI-compatible serial interface, and an on-chip output amplifier capable of rail-to-rail operation. They also feature a power-on reset to zero scale and a power-down mode with software-selectable output loads.
Do the AD5318ARUZ and AD5318ARU differ in operating temperature range?
No. Both the AD5318ARUZ and AD5318ARU are specified over the industrial temperature range of −40°C to +105°C, as stated in the Analog Devices datasheet.
Which part should be selected for a new design, the AD5318ARUZ or the AD5318ARU?
For new designs, the AD5318ARUZ is generally recommended because it is the RoHS-compliant, lead-free version. The AD5318ARU is the legacy non-RoHS version and may be subject to restrictions or availability limitations in certain regions.
Are the AD5318ARUZ and AD5318ARU available in the same package type?
Yes. Both devices are available in a 16-lead TSSOP package. The package dimensions and thermal characteristics are identical between the two versions.