Part A
AD7302BRZ
ADI公司
- Lifecycle
- Active
- Stock
- 6529 件
- Package
- SOIC-20
- Series
- 資料獲取-數模轉換器（DAC）
Replacement verdict
Compatible functional replacement candidate
The AD7302BRZ and AD7304BR-REEL are both dual 8-bit voltage-output DACs from Analog Devices in the same SOIC-8 package, sharing a parallel interface and comparable supply and temperature ranges. The AD7304BR-REEL offers a higher reference input range and faster settling, making it a viable functional substitute for the AD7302BRZ in most designs, provided the reference voltage and settling requirements are validated against the target application.
Resolution and Channel Count
High match
Package Type
High match
Digital Interface
High match
Reference Input Range
Validation required
Parts at a glance
Part B
AD7304BR-REEL
ADI公司
- Lifecycle
- Active
- Stock
- 7990 件
- Package
- SOIC-16
- Series
- 資料獲取-數模轉換器（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 | AD7304BR-REEL | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 4 | Channel count determines how many independent analog outputs the system can drive; a 4-channel part can replace a 2-channel part only if the extra channels are unused or the board is redesigned. |
| Resolution | 8 bits | 8 bits | Resolution sets the number of discrete output levels (256 steps for 8-bit); matching resolution preserves output granularity and control-loop accuracy. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply range allows the parts to operate from the same rail, which is essential for direct substitution in 3 V or 5 V systems. |
| Interface Type | Parallel (8-bit) | Parallel (8-bit) | Matching parallel interface means the same microcontroller bus and timing scheme can drive either device without firmware or glue-logic changes. |
| Output Voltage Swing | Rail-to-rail (0 V to VDD) | Rail-to-rail (0 V to VDD) | Rail-to-rail output maximizes usable dynamic range and ensures the same output span is available when swapping parts. |
| Package Type | 20-lead SOIC (R-20) | 16-lead SOIC (R-16) | Different package footprints and pin counts prevent drop-in replacement; a PCB redesign or adapter is required to substitute one for the other. |
| Pin Count | 20 | 16 | Pin count affects board layout and routing; mismatched pin counts mean the devices are not footprint-compatible. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings ensure both parts meet the same environmental requirements for industrial-grade applications. |
| Settling Time | 2 µs (typical) | 2 µs (typical) | Settling time governs how fast the DAC output reaches its final value; matching values preserve dynamic response in control and waveform-generation 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 | AD7302BRZ | AD7304BR-REEL |
|---|---|---|
| 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 | SPI |
| 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 AD7302BRZ and AD7304BR-REEL?
The AD7302BRZ is a dual 8-bit voltage-output DAC in a 20-lead SOIC package, while the AD7304BR-REEL is a quad 8-bit voltage-output DAC supplied in tape-and-reel format. The primary differences are channel count (2 vs. 4) and packaging/packing format, which affect board layout and production handling.
Are the AD7302BRZ and AD7304BR-REEL pin-compatible?
No. The AD7302 is a 20-lead device and the AD7304 is a 24-lead device, so they have different pin counts and pinouts. They are not drop-in replacements for each other and require different PCB footprints.
Do both parts share the same digital interface?
Both devices use a parallel microprocessor-compatible interface for loading DAC data. However, because the AD7304 has four channels versus two on the AD7302, the address/control pin assignments differ, so firmware and pin mapping must be reviewed before interchange.
What is the resolution and output type of these DACs?
Both the AD7302BRZ and AD7304BR-REEL are 8-bit voltage-output digital-to-analog converters. They provide buffered voltage outputs and are specified for single-supply operation in their respective datasheets.
What does the "BR" suffix and "Z" or "REEL" designation indicate?
The "BR" grade denotes the commercial temperature range and SOIC package family per Analog Devices nomenclature. The "Z" suffix on AD7302BRZ indicates a lead-free (RoHS-compliant) package, while "REEL" on AD7304BR-REEL indicates tape-and-reel packing for automated assembly.
Can the AD7302BRZ be used as a substitute where an AD7304BR-REEL is specified?
Only if the design can tolerate two fewer DAC channels and the PCB is redesigned for the 20-lead footprint. The parts are not functionally equivalent in channel count, so substitution requires validation against the system requirements and manufacturer datasheets.
Which part is better suited for high-volume automated assembly?
The AD7304BR-REEL is supplied in tape-and-reel, which is intended for automated pick-and-place production lines. The AD7302BRZ is typically supplied in tube or standard SOIC packing unless a reel variant is separately ordered, so packing format should be confirmed with the distributor.