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 AD5318ARU and AD5316ARU share the same TSSOP-16 footprint, 2.5 V to 5.5 V supply range, and 10-bit resistor-string DAC architecture, making the AD5318ARU a viable functional replacement candidate for the AD5316ARU in many designs. However, the AD5318ARU provides eight DAC channels versus four on the AD5316ARU, and its reference input configuration differs, so reference drive and channel-count requirements must be validated before substitution.
Resolution
High match
Package Type
High match
Channel Count
Validation required
Reference Input
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 | AD5318ARU | AD5316ARU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 4 | Determines how many independent analog outputs are available; a direct functional difference affecting channel count requirements. |
| Resolution | 10 bits | 10 bits | Sets the output voltage step size and achievable precision; identical resolution means comparable accuracy per channel. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Defines the digital communication protocol with the host controller; matching interfaces simplify drop-in replacement. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Determines compatibility with system power rails; identical range supports the same supply design. |
| Output Voltage Range | 0 V to VREF | 0 V to VREF | Defines the analog output span relative to the reference; matching ranges preserve signal scaling behavior. |
| Reference Input | External | External | Indicates whether an internal reference exists; both requiring external reference means similar external circuitry is needed. |
| Package Type | 16-Lead TSSOP | 16-Lead TSSOP | Affects PCB footprint and assembly; identical packages allow the same board layout. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Specifies environmental limits for reliable operation; matching ranges suit the same application environments. |
| Power-Down Modes | Multiple power-down modes available | Multiple power-down modes available | Enables low-power standby operation; both offering power-down modes supports similar power management strategies. |
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 | AD5318ARU | AD5316ARU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 10 | 10 |
| Number of D/A Converters | 8 | - |
| Settling Time | 9µs | - |
| Output Type | Voltage - Buffered | - |
| Differential Output | No | - |
| Data Interface | SPI, DSP | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 2.5V ~ 5.5V | - |
| Voltage - Supply, Digital | 2.5V ~ 5.5V | - |
| INL / DNL(LSB) | ±0.5, ±0.05 | - |
| Architecture | String DAC | - |
| Operating Temperature | -40°C ~ 125°C | - |
Frequently asked questions
What are the key differences between the AD5318ARU and AD5316ARU?
The AD5318ARU is an octal 10-bit DAC, while the AD5316ARU is a quad 10-bit DAC. Both are members of the Analog Devices AD53xx family and share the same 10-bit resolution, 2.5 V to 5.5 V supply range, and 16-lead TSSOP (RU) package, but the AD5318ARU integrates eight DAC channels versus four on the AD5316ARU.
Are the AD5318ARU and AD5316ARU pin-compatible?
No. Although both devices are offered in a 16-lead TSSOP (RU suffix), the AD5318ARU uses the additional pins to provide four extra DAC outputs and associated reference inputs, so the pinouts are not identical. A direct drop-in replacement is not possible without PCB redesign.
Do the AD5318ARU and AD5316ARU have the same resolution and interface?
Yes. Both are 10-bit voltage-output DACs with a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, operating from a single 2.5 V to 5.5 V supply.
Can the AD5316ARU be used as a substitute for the AD5318ARU in an existing design?
Not directly. The AD5316ARU provides only four DAC channels versus eight on the AD5318ARU, and the pinouts differ. Substitution requires verifying channel count, reference configuration, output loading, and PCB layout against the manufacturer datasheets.
What is the package type for both the AD5318ARU and AD5316ARU?
Both devices are specified in a 16-lead thin shrink small outline package (TSSOP), indicated by the RU suffix in the part number.
Do both devices support the same reference input configuration?
Both the AD5318ARU and AD5316ARU provide external reference inputs and allow the reference to be shared across channels. The AD5318ARU has more reference pins due to its higher channel count, so the reference distribution network differs between the two parts.
Which device is better for applications requiring more analog output channels?
The AD5318ARU is the appropriate choice when eight 10-bit DAC channels are needed in a single 16-lead TSSOP package. The AD5316ARU is suitable when only four channels are required and board space or cost favors the lower channel count.