Part A
AD5318BRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2182 個数
- Package
- TSSOP-16
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5318BRUZ and AD5313ARU are both dual-channel 10-bit voltage-output DACs from Analog Devices, but they differ in digital interface, reference architecture, and resolution. The AD5318BRUZ offers a parallel interface and 10-bit resolution, while the AD5313ARU provides a serial SPI interface with 12-bit resolution. These differences require careful validation before substitution in existing designs.
Resolution
Validation required
Digital Interface
Not compatible
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 | AD5318BRUZ | AD5313ARU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 8 | 2 | Channel count determines how many independent analog outputs the system can drive, directly affecting board layout and device substitution. |
| Resolution | 10 bits | 10 bits | Resolution sets the smallest output voltage step, which governs achievable setpoint accuracy and control granularity. |
| Interface Type | SPI / DSP | I2C | The digital interface must match the host controller, so differing serial protocols prevent direct drop-in replacement. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Compatible supply rails allow the parts to operate from the same system power without additional regulation. |
| Reference Input | External | External | Both require an external reference, so the reference source and its accuracy dominate overall output precision. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Matching footprints enable the same PCB land pattern, though pinout differences still require verification. |
| INL (Integral Nonlinearity) | ±0.5 LSB | ±0.5 LSB | INL defines worst-case deviation from the ideal transfer curve and thus the absolute accuracy of the DAC output. |
| 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 over the full operating window. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5318BRUZ | AD5313ARU |
|---|---|---|
| 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 AD5313ARU?
The AD5318BRUZ is an octal 10-bit voltage-output DAC with a serial interface, while the AD5313ARU is a dual 10-bit voltage-output DAC with a serial interface. The AD5318BRUZ provides eight DAC channels in a 16-lead TSSOP package, whereas the AD5313ARU provides two DAC channels in a 16-lead TSSOP package. Both operate from a 2.5 V to 5.5 V supply and offer a 10-bit resolution, but they differ in channel count, package pinout, and power consumption characteristics.
Are the AD5318BRUZ and AD5313ARU pin-compatible?
No. The AD5318BRUZ and AD5313ARU are not pin-compatible. Although both are offered in a 16-lead TSSOP package, their pin functions and internal architectures differ due to the different number of DAC channels (eight vs. two). The AD5318BRUZ uses additional pins for the extra DAC outputs and associated reference inputs, while the AD5313ARU has a different pin assignment. A direct drop-in replacement is not possible without PCB redesign.
Can the AD5318BRUZ and AD5313ARU operate from the same supply voltage?
Yes. Both the AD5318BRUZ and AD5313ARU are specified to operate from a single supply voltage range of 2.5 V to 5.5 V. This allows both devices to be used in systems with common logic and analog supply levels, such as 3.3 V or 5 V rails, provided the respective datasheet timing and reference requirements are met.
What is the resolution and output type of the AD5318BRUZ and AD5313ARU?
Both the AD5318BRUZ and AD5313ARU are 10-bit voltage-output digital-to-analog converters (DACs). Each provides a buffered voltage output that can swing from 0 V to the reference voltage (or 0 V to VDD, depending on configuration). The AD5318BRUZ integrates eight such DACs, while the AD5313ARU integrates two. Neither device includes an internal reference; an external reference must be supplied for accurate operation.
Do the AD5318BRUZ and AD5313ARU support the same serial interface?
Yes. Both devices use a standard 3-wire or 4-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The interface operates at clock rates up to 30 MHz for the AD5318BRUZ and up to 30 MHz for the AD5313ARU, as specified in their respective datasheets. The command structure and register set differ because the AD5318BRUZ manages eight channels while the AD5313ARU manages two, but the physical interface protocol is similar.
Which device is more suitable for multi-channel applications, the AD5318BRUZ or the AD5313ARU?
The AD5318BRUZ is more suitable for multi-channel applications because it integrates eight independent 10-bit DACs in a single 16-lead TSSOP package, reducing board space and component count compared to using multiple dual DACs. The AD5313ARU, with only two DAC channels, is better suited for applications requiring a small number of analog outputs, such as dual-channel setpoint control or compact closed-loop systems.
What are the power consumption characteristics of the AD5318BRUZ and AD5313ARU?
The AD5318BRUZ typically consumes 0.7 mA per channel at 3 V, resulting in a total supply current of approximately 5.6 mA when all eight channels are active. The AD5313ARU typically consumes 0.7 mA per channel at 3 V, for a total of approximately 1.4 mA with both channels active. Both devices feature a power-down mode that reduces supply current to typically 0.5 µA at 3 V, but the absolute power consumption depends on the number of active channels and the supply voltage.
Are the AD5318BRUZ and AD5313ARU RoHS compliant?
Yes. Both the AD5318BRUZ and AD5313ARU are available in RoHS-compliant packages. The "Z" suffix in AD5318BRUZ indicates a lead-free, RoHS-compliant version of the AD5318 in a 16-lead TSSOP package. The AD5313ARU is also offered in a RoHS-compliant 16-lead TSSOP package, though the exact compliance status should be confirmed by the specific ordering part number and the manufacturer's product change notification or datasheet.