Part A
AD5318BRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2182 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5318BRUZ and AD5317BRU are both quad 10-bit voltage-output DACs from Analog Devices in 16-lead TSSOP packages, sharing identical resolution, channel count, and supply requirements. The AD5318BRUZ provides a parallel interface while the AD5317BRU uses an SPI-compatible serial interface, making them functionally similar but requiring interface validation before substitution. The AD5318BRUZ is a viable functional replacement candidate for the AD5317BRU when the system interface can accommodate the parallel-to-serial change.
Resolution
High match
Channel Count
High match
Digital Interface
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 | AD5318BRUZ | AD5317BRU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 4 | Channel count determines how many independent analog outputs the system can drive, directly affecting board layout and whether the part is a functional substitute. |
| Resolution | 10 bits | 10 bits | Resolution sets the smallest output voltage step, which governs achievable setpoint accuracy and control loop precision. |
| Interface Type | SPI / DSP / Microwire compatible | I2C compatible | The digital interface must match the host controller's available bus, so differing interfaces prevent drop-in substitution without firmware and wiring changes. |
| Package / Pin Count | 16-lead TSSOP | 16-lead TSSOP | Package and pin count affect footprint compatibility and whether the part can be placed on an existing PCB layout. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | The supply range must cover the system rail to ensure correct operation and output headroom. |
| Reference Input | External reference | External reference | Reference configuration determines output full-scale range and whether an external reference circuit is required. |
| Output Type | Voltage output | Voltage output | Output type must match the load and signal chain requirements for the DAC to be usable in the same application. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | The temperature range must cover the application environment to guarantee specified performance and reliability. |
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 | AD5318BRUZ | AD5317BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | 10 |
| Number of D/A Converters | 8 | 4 |
| 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 ~ 105°C |
Frequently asked questions
What are the key differences between the AD5318BRUZ and the AD5317BRU?
The AD5318BRUZ is an octal 10-bit DAC in a 16-lead TSSOP package, while the AD5317BRU is a quad 10-bit DAC in a 16-lead TSSOP package. The AD5318 provides eight DAC channels, whereas the AD5317 provides four DAC channels. Both are members of the Analog Devices AD531x family and share a similar serial interface and reference architecture, but they differ in channel count and therefore in the number of available output pins.
Are the AD5318BRUZ and AD5317BRU pin-compatible?
No. Although both devices are offered in a 16-lead TSSOP package, they are not pin-compatible because the AD5318BRUZ uses the available pins for eight DAC outputs, while the AD5317BRU uses them for four DAC outputs plus additional functions. A direct drop-in replacement without PCB redesign is not supported by the manufacturer datasheets.
Do the AD5318BRUZ and AD5317BRU have the same resolution and DAC architecture?
Yes. Both the AD5318BRUZ and the AD5317BRU are 10-bit voltage-output DACs with a resistor-string architecture. They provide the same resolution and monotonicity performance as specified in their respective Analog Devices datasheets.
What serial interface do the AD5318BRUZ and AD5317BRU use?
Both devices use a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The interface operates at clock rates specified in the Analog Devices datasheets and supports daisy-chain configuration for multiple devices.
Can the AD5318BRUZ and AD5317BRU operate from the same supply voltage range?
Yes. Both the AD5318BRUZ and the AD5317BRU operate from a single 2.5 V to 5.5 V supply, as specified in their Analog Devices datasheets. This allows both devices to be used in similar low-voltage system designs.
Do the AD5318BRUZ and AD5317BRU have the same reference input configuration?
Both devices provide an external reference input pin and do not include an internal reference. The reference input voltage range and the resulting output voltage span are defined by the external reference applied, per the Analog Devices datasheets for each part.
What are the package and temperature range specifications for the AD5318BRUZ and AD5317BRU?
Both the AD5318BRUZ and the AD5317BRU are specified for the industrial temperature range of −40°C to +105°C and are offered in a 16-lead TSSOP package. The "RUZ" suffix in AD5318BRUZ indicates a RoHS-compliant TSSOP package; the AD5317BRU is also available in a 16-lead TSSOP package as stated in the Analog Devices datasheet.
Which part should be selected for an application requiring eight DAC channels?
The AD5318BRUZ should be selected for applications requiring eight independent 10-bit DAC channels in a single 16-lead TSSOP package. The AD5317BRU provides only four DAC channels and would require two devices to achieve eight channels, increasing board space and component count.