Part A
AD7302BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7737 Stückzahl
- Package
- TSSOP-20
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7302BRUZ and AD7305BRU are both dual 8-bit voltage-output DACs from Analog Devices in TSSOP-16 packages with comparable supply and temperature ranges, making the AD7305BRU a viable functional replacement candidate for the AD7302BRUZ. Designers should validate the interface timing and reference configuration against the target application before substituting.
Resolution and Channel Count
High match
Package Type
High match
Digital Interface
Validation required
Reference Configuration
Validation required
Parts at a glance
Part B
AD7305BRU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6487 Stückzahl
- Package
- TSSOP-20
- 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 | AD7302BRUZ | AD7305BRU | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 4 | Channel count determines how many independent analog outputs are available; a 4-channel part cannot be substituted where 2 channels suffice without layout changes, and vice versa. |
| Resolution | 8 bits | 8 bits | Resolution sets the number of discrete output levels; matching resolution is essential for equivalent output granularity and accuracy. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The supply range must match the system rail to ensure proper operation and output swing compatibility. |
| Interface Type | Parallel | Parallel | The digital interface must be compatible with the host controller's bus to allow direct communication without glue logic. |
| Package / Mounting | TSSOP-16 (Surface Mount) | TSSOP-16 (Surface Mount) | Package and footprint must match for board-level drop-in compatibility; differing pin counts or body sizes require PCB redesign. |
| Output Type | Voltage output | Voltage output | Voltage-output DACs drive loads directly, while current-output types require external op-amps; matching output type preserves circuit topology. |
| 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. |
| Settling Time | 2 µs (typical) | 2 µs (typical) | Settling time limits the maximum update rate; matching values ensures equivalent dynamic response in control loops. |
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 | AD7302BRUZ | AD7305BRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 8 | 8 |
| Number of D/A Converters | 2 | 4 |
| Settling Time | 2µs | 2µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | Parallel | Parallel |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V, ±5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| INL / DNL(LSB) | ±1 (Max), ±1 (Max) | ±1 (Max), ±1 (Max) |
| Architecture | Current Source | R-2R |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7302BRUZ and the AD7305BRU?
The AD7302BRUZ is a dual 8-bit voltage-output DAC, while the AD7305BRU is a quad 8-bit voltage-output DAC. Both are specified for operation from a single 2.7 V to 5.5 V supply (with the AD7305 also supporting ±5 V dual supplies) and are offered in 20-lead TSSOP packages, but the AD7305 integrates four DAC channels versus two on the AD7302.
Are the AD7302BRUZ and AD7305BRU pin-compatible?
No. Although both devices are housed in 20-lead TSSOP packages, the AD7302 is a dual-channel DAC and the AD7305 is a quad-channel DAC, so the pin functions and internal signal assignments differ. A direct drop-in replacement should not be assumed without verifying the pinout in the respective manufacturer datasheets.
What is the resolution and channel count of each device?
Both parts are 8-bit voltage-output DACs. The AD7302BRUZ provides two independent DAC channels, whereas the AD7305BRU provides four independent DAC channels, making the AD7305 suitable for applications requiring more analog output channels in a single package.
What supply voltage ranges do the AD7302BRUZ and AD7305BRU support?
The AD7302BRUZ operates from a single supply of 2.7 V to 5.5 V. The AD7305BRU operates from a single supply of 2.7 V to 5.5 V and also supports dual supplies of ±5 V, which allows bipolar output swing in dual-supply systems.
Do both devices use the same digital interface?
Both the AD7302 and AD7305 use a parallel digital interface for loading DAC data. Because the AD7305 has four channels versus two on the AD7302, the address/data pin allocation differs, so the host interface timing and control signals should be checked against each device's datasheet before designing a common interface.
Can the AD7302BRUZ be replaced by the AD7305BRU in an existing design?
Not as a direct drop-in replacement. The AD7305 offers four channels instead of two and supports dual ±5 V supplies, but its pinout and control interface differ from the AD7302. Any substitution requires validating the pinout, supply configuration, and digital interface against the manufacturer datasheet for the target design.
What package do the AD7302BRUZ and AD7305BRU use?
Both devices are offered in a 20-lead TSSOP package, indicated by the "RU" suffix in their part numbers. The package style is the same, but the internal pin assignments differ because of the different channel counts.