Part A
AD5318BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2182 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD5318BRUZ and AD5313BRU are not drop-in replacements for each other. Although both are dual 10-bit voltage-output DACs from Analog Devices in 16-lead TSSOP packages with similar supply and interface characteristics, they differ in channel count, reference architecture, and internal register configuration, requiring design validation before any substitution.
Different channel count
Different reference architecture
Different register configuration
Different resolution
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 | AD5313BRU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 2 | 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 | 10 bits | 10 bits | Resolution sets the smallest output voltage step and thus the achievable precision of the analog output. |
| Interface Type | SPI / DSP (serial) | I2C (serial) | The digital interface must match the host controller; SPI and I2C are not pin- or protocol-compatible, so substitution requires firmware and wiring changes. |
| Package / Pin Count | 16-lead TSSOP | 16-lead TSSOP | Package and pin count affect PCB footprint and layout compatibility for drop-in replacement. |
| 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 swing. |
| Reference Type | External | External | Reference configuration determines output scaling and whether an external reference circuit is required. |
| Output Type | Voltage output | Voltage output | Output type must match the load requirements; voltage-output DACs are not interchangeable with current-output types. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | The temperature range must cover the application environment for reliable operation. |
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 | AD5313BRU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 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 AD5318BRUZ and the AD5313BRU?
The AD5318BRUZ is an octal 10-bit DAC with a serial interface, while the AD5313BRU is a dual 10-bit DAC with a serial interface. The AD5318 provides eight independent DAC channels in a 16-lead TSSOP package, whereas the AD5313 provides two independent DAC channels in a 16-lead TSSOP package. Both operate from a 2.5 V to 5.5 V supply and offer a rail-to-rail output amplifier.
Are the AD5318BRUZ and AD5313BRU pin-compatible?
No. Although both devices are offered in a 16-lead TSSOP package, their pinouts differ because the AD5318BRUZ has eight DAC outputs and the AD5313BRU has two DAC outputs. The pin functions and assignments are not interchangeable, so they cannot be used as drop-in replacements without PCB redesign.
What is the resolution and number of DAC channels for each device?
The AD5318BRUZ provides eight 10-bit DAC channels. The AD5313BRU provides two 10-bit DAC channels. Both have a 10-bit resolution and a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
What supply voltage range do the AD5318BRUZ and AD5313BRU support?
Both the AD5318BRUZ and AD5313BRU operate from a single supply voltage of 2.5 V to 5.5 V. They also feature a power-on reset to zero scale and a power-down mode that reduces current consumption to typically 0.5 µA at 5 V.
Can the AD5318BRUZ and AD5313BRU be used in daisy-chain applications?
Yes. Both devices include a SDO (Serial Data Output) pin that allows multiple devices to be daisy-chained. This enables the control of multiple DACs using a single serial interface, which is useful when several channels are required in a system.
What are the package and operating temperature ranges for these devices?
Both the AD5318BRUZ and AD5313BRU are available in a 16-lead TSSOP package and are specified for operation over the industrial temperature range of −40°C to +105°C. The AD5318BRUZ and AD5313BRU are RoHS-compliant.
Which device is more suitable for applications requiring many DAC channels?
The AD5318BRUZ is more suitable for applications requiring many DAC channels because it integrates eight 10-bit DACs in a single package. The AD5313BRU, with only two DAC channels, is better suited for designs where board space and cost are critical and only a few channels are needed.
Do the AD5318BRUZ and AD5313BRU have the same digital interface timing?
Yes. Both devices use the same serial interface protocol and have similar timing characteristics, including a maximum SCLK frequency of 30 MHz. The interface is compatible with SPI, QSPI, MICROWIRE, and DSP standards, allowing them to share a common digital bus in mixed configurations.