Part A
AD7302BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6529 Stückzahl
- Package
- SOIC-20
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD7302BRZ and AD7305BR are both dual 8-bit voltage-output DACs from Analog Devices in 8-lead SOIC packages, sharing a parallel interface and comparable supply and temperature ranges. The AD7305BR offers a wider supply span and higher reference input range, while the AD7302BRZ provides a higher reference input limit and slightly faster settling. Both are functionally similar, but the AD7305BR requires validation of reference drive and output swing in the target design before substitution.
Resolution and Channel Count
High match
Package Type
High match
Supply Voltage Range
Validation required
Reference Input Range
Validation required
Parts at a glance
Part B
AD7305BR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4818 Stückzahl
- Package
- SOIC-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 | AD7302BRZ | AD7305BR | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 4 | Channel count determines how many independent analog outputs are available; a 4-channel part cannot directly replace a 2-channel part in a fixed layout. |
| Resolution | 8 bits | 8 bits | Resolution sets the number of discrete output levels; matching resolution is required for equivalent output granularity. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The supply range must cover the system rail; both parts support the same low-voltage operating window. |
| Interface Type | Parallel | Parallel | The digital interface must match the host bus; both use a parallel interface for direct microcontroller or DSP connection. |
| Package / Mounting | 20-Lead SOIC (Surface Mount) | 20-Lead SOIC (Surface Mount) | Package and footprint must be compatible for board-level substitution; both are 20-lead SOIC surface-mount devices. |
| Output Type | Voltage Output | Voltage Output | Voltage-output DACs drive loads directly without external I-to-V conversion, simplifying the analog signal chain. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | The temperature range must cover the application environment; both parts are specified for industrial temperature operation. |
| Settling Time | 2 µs (typical) | 2 µs (typical) | Settling time affects how quickly the DAC output reaches its final value, impacting dynamic performance in control loops. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7302BRZ | AD7305BR |
|---|---|---|
| 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 architectural differences between the AD7302BRZ and AD7305BR?
The AD7302BRZ is a dual 8-bit voltage-output DAC with a parallel interface, while the AD7305BR is a quad 8-bit voltage-output DAC with a parallel interface. The AD7302 provides two DAC channels, whereas the AD7305 integrates four DAC channels in a single package, making the AD7305BR suitable for applications requiring more analog output channels per device.
Are the AD7302BRZ and AD7305BR pin-compatible?
No. The AD7302BRZ is offered in a 20-lead SOIC package, while the AD7305BR is offered in a 20-lead SOIC package as well, but the pin functions differ because the AD7305 provides four DAC outputs versus two on the AD7302. The additional DAC channels and associated control pins mean the pinouts are not interchangeable, so PCB layouts must be designed specifically for each part.
Do both devices use the same digital interface?
Both the AD7302BRZ and AD7305BR use a parallel digital interface for loading DAC data. However, the AD7305BR requires additional address and control lines to select among its four DAC channels, whereas the AD7302BRZ addresses only two channels. System firmware and bus timing must be adapted accordingly when migrating between the two devices.
What is the resolution and output range of these DACs?
Both the AD7302BRZ and AD7305BR are 8-bit voltage-output DACs. Each provides a rail-to-rail voltage output that swings from 0 V to the reference voltage (or supply rail, depending on configuration). The 8-bit resolution yields 256 output steps, which is identical across both parts; the primary difference is channel count, not resolution.
Can the AD7302BRZ be replaced by the AD7305BR in an existing design?
Not as a drop-in replacement. Although both are 8-bit parallel-input voltage-output DACs, the AD7305BR has four channels versus two on the AD7302BRZ, and the pinouts and channel-addressing scheme differ. A replacement requires PCB redesign, firmware updates for channel addressing, and validation against the manufacturer datasheet for timing and reference requirements.
What are the typical applications for each device?
The AD7302BRZ, with two 8-bit DAC channels, is typically used in applications such as digital gain and offset adjustment, programmable voltage sources, and portable instrumentation where two analog outputs suffice. The AD7305BR, with four channels, suits multi-channel control loops, quad setpoint generation, and systems needing multiple programmable references in a compact footprint.
Do both parts operate from the same supply voltage range?
Both the AD7302BRZ and AD7305BR are specified for single-supply operation in the 2.7 V to 5.5 V range, per the manufacturer datasheet. Designers should confirm the exact supply and reference conditions in the respective datasheets, since output swing and accuracy specifications depend on the applied reference and supply.