Part A
AD7302BRZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6529 個数
- Package
- SOIC-20
- 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 AD7302BRZ and AD7303BR are both dual 8-bit voltage-output DACs from Analog Devices in 8-lead SOIC packages with a 2.7 V to 5.5 V supply range and similar serial interface architecture, making them strong functional replacement candidates. Designers should validate the reference input configuration and digital interface timing against the target application before substituting one for the other.
Resolution and DAC Architecture
High match
Package Type
High match
Reference Input Configuration
Validation required
Digital Interface Timing
Validation required
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 | AD7303BR | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 2 | Both are dual-channel DACs, so channel count is functionally equivalent for two-output designs. |
| Resolution | 8 bits | 8 bits | Identical resolution means the same output granularity and quantization error for both parts. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply ranges allow either part to operate in the same low-voltage system rails. |
| Interface Type | Parallel | SPI-compatible serial | The interface differs fundamentally; a parallel bus design cannot directly drop in a serial device without rework. |
| Package / Mounting | 20-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Different package pin counts and footprints prevent direct board-level substitution. |
| Reference Type | External reference | External reference | Both require an external reference, so reference design can be shared between the two parts. |
| Output Type | Voltage output | Voltage output | Both provide voltage-mode outputs, matching the signal type expected by downstream analog stages. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Identical temperature ratings ensure equivalent environmental robustness in industrial applications. |
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 | AD7302BRZ | AD7303BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 8 | 8 |
| Number of D/A Converters | 2 | 2 |
| Settling Time | 2µs | 2µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | Parallel | SPI |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| 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 | Current Source |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What are the key differences between the AD7302BRZ and AD7303BR?
The AD7302BRZ is a dual 8-bit voltage-output DAC with a parallel interface, housed in a 20-lead SOIC package. The AD7303BR is a dual 8-bit voltage-output DAC with a serial (SPI-compatible) interface, housed in an 8-lead SOIC package. The primary differences are the digital interface (parallel vs. serial) and package size/pin count.
Are the AD7302BRZ and AD7303BR pin-compatible?
No. The AD7302BRZ uses a 20-lead SOIC package, while the AD7303BR uses an 8-lead SOIC package. They have different pin counts and pin functions, so they are not pin-compatible and cannot be interchanged on the same PCB footprint without redesign.
Do both parts have the same resolution and number of DAC channels?
Yes. Both the AD7302BRZ and AD7303BR are dual-channel, 8-bit voltage-output DACs, offering the same resolution and channel count.
What digital interface does each part use?
The AD7302BRZ uses a parallel microprocessor-compatible interface for loading DAC data. The AD7303BR uses a serial interface compatible with SPI, QSPI, and MICROWIRE protocols, requiring fewer I/O pins from the host controller.
Can the AD7303BR be used as a drop-in replacement for the AD7302BRZ?
No. Because the two devices differ in package footprint (8-lead vs. 20-lead SOIC) and digital interface (serial vs. parallel), the AD7303BR is not a drop-in replacement for the AD7302BRZ. A board redesign and firmware change would be required.
Do both devices operate from the same supply voltage range?
Both the AD7302BRZ and AD7303BR are specified for single-supply operation from 2.7 V to 5.5 V, making them suitable for low-voltage, mixed-signal systems.
Which part is better suited for systems with limited microcontroller I/O pins?
The AD7303BR is better suited for I/O-constrained designs because its serial interface requires only a few control lines, whereas the AD7302BRZ's parallel interface requires a full data bus and additional control signals from the host.