Part A
AD5308ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2931 Stückzahl
- Package
- TSSOP-16
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5308ARUZ and AD5308BRU are functionally equivalent octal 8-bit DACs sharing identical package, pinout, and channel architecture, making the AD5308BRU a viable replacement candidate for the AD5308ARUZ in most designs. The primary distinction lies in the specified linearity grade, where the BRU version offers tighter relative accuracy and differential nonlinearity specifications. Designers should validate that the BRU grade's guaranteed monotonicity and INL/DNL limits meet the target application's precision requirements before substituting.
Resolution and Channel Count
High match
Package Type and Pinout
High match
Interface Type
High match
INL/DNL Linearity Grade
Validation required
Parts at a glance
Part B
AD5308BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2497 Stückzahl
- Package
- TSSOP-16
- Series
- Data Acquisition von 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 | AD5308ARUZ | AD5308BRU | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 8 bit | Determines the smallest analog output step; both are 8-bit, so quantization granularity is identical. |
| Number of DAC Channels | 8 | 8 | Channel count defines how many independent analog outputs are available; both provide eight channels. |
| Interface Type | SPI, DSP | SPI, DSP | The digital interface must match the host controller; both support SPI and DSP-compatible serial interfaces. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Defines the allowable power supply window; both operate over the same 2.5 V to 5.5 V range. |
| Reference Input | External | External | An external reference sets the full-scale output; both require an external reference voltage. |
| INL (Integral Nonlinearity) | ±0.15 LSB | ±0.15 LSB | INL indicates deviation from an ideal transfer function; matching INL means comparable accuracy performance. |
| DNL (Differential Nonlinearity) | ±0.05 LSB | ±0.05 LSB | DNL affects monotonicity and step uniformity; identical DNL ensures equivalent linearity behavior. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Temperature range determines suitability for industrial and automotive environments; both cover the same extended range. |
| Package / Case | 16-TSSOP | 16-TSSOP | Package type affects PCB footprint and thermal performance; both use the same 16-lead TSSOP. |
| Grade | A Grade | B Grade | Grade typically denotes tested performance limits; A and B grades may differ in guaranteed specifications, affecting substitutability in precision applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5308ARUZ | AD5308BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 8 | 8 |
| Number of D/A Converters | 8 | 8 |
| Settling Time | 8µs | 8µs |
| 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) | ±0.15, ±0.02 | ±0.15, ±0.02 |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD5308ARUZ and AD5308BRU?
The AD5308ARUZ and AD5308BRU are both octal 8-bit DACs from Analog Devices in a 16-lead TSSOP package. The primary difference is the grade: the AD5308ARUZ is the A-grade version, while the AD5308BRU is the B-grade version. The B-grade offers tighter specifications, particularly in relative accuracy (INL) and differential nonlinearity (DNL), compared to the A-grade. Both share the same functional architecture, pinout, and supply requirements.
Are the AD5308ARUZ and AD5308BRU pin-to-pin compatible?
Yes. Both devices are offered in the same 16-lead TSSOP (RU-16) package and share an identical pinout. This allows the AD5308BRU to be used as a drop-in replacement for the AD5308ARUZ on an existing PCB, provided the tighter B-grade specifications are acceptable or required by the design.
What are the INL and DNL specifications for the AD5308ARUZ and AD5308BRU?
Per the Analog Devices datasheet, the AD5308ARUZ (A-grade) has a relative accuracy (INL) of ±1 LSB max and a differential nonlinearity (DNL) of ±1 LSB max, both guaranteed monotonic. The AD5308BRU (B-grade) offers improved linearity with an INL of ±0.625 LSB max and a DNL of ±0.25 LSB max, also guaranteed monotonic. These tighter specs make the B-grade preferable for higher-precision applications.
Do the AD5308ARUZ and AD5308BRU have the same supply voltage and reference requirements?
Yes. Both devices operate from a single 2.5 V to 5.5 V supply and require an external reference voltage. The reference input range is 0.25 V to VDD for both grades. The digital interface is compatible with 3-wire SPI, QSPI, MICROWIRE, and DSP interface standards, and both support power-down modes with software-selectable output loads.
Can the AD5308BRU be used in place of the AD5308ARUZ without any design changes?
Yes, from a hardware and interface perspective, the AD5308BRU is a direct drop-in replacement for the AD5308ARUZ because they share the same package, pinout, and functional behavior. However, the B-grade's tighter linearity specifications may affect system calibration or error budget calculations. The designer should verify that the improved performance does not require adjustments to the surrounding circuitry or software.
What is the operating temperature range for the AD5308ARUZ and AD5308BRU?
Both the AD5308ARUZ and AD5308BRU are specified for the industrial temperature range of −40°C to +105°C. This is consistent across both grades as stated in the Analog Devices datasheet.
Are the AD5308ARUZ and AD5308BRU RoHS compliant?
Yes. Both the AD5308ARUZ and AD5308BRU are RoHS-compliant parts. The "Z" suffix in AD5308ARUZ indicates a RoHS-compliant version, and the AD5308BRU is also supplied in a RoHS-compliant 16-lead TSSOP package. Designers should confirm the specific ordering code and compliance documentation from the manufacturer or authorized distributor for the latest status.