Part A
AD5322BRM
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2754 PCS
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5321BRMZ and AD5322BRM are both 12-bit voltage-output DACs from Analog Devices in the MSOP-8 package, sharing a compatible supply range and serial interface. However, the AD5321BRMZ is a single-channel device while the AD5322BRM is dual-channel, so the AD5322BRM can serve as a functional substitute only when the second DAC channel is unused or the board layout accommodates the additional channel. Designers should verify channel count requirements, reference configuration, and output loading before committing to this substitution.
Resolution
High match
Channel Count
Not compatible
Package Type
High match
Reference Configuration
Validation required
Parts at a glance
Part B
AD5321BRMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3782 PCS
- Package
- MSOP-8
- Series
- Data Acquisition - 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 | AD5321BRMZ | AD5322BRM | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 1 | 2 | Channel count determines how many independent analog outputs the system can drive; a single-channel part cannot replace a dual-channel part without adding another device. |
| Resolution | 12 bits | 12 bits | Resolution sets the smallest output voltage step and thus the achievable precision of the analog output. |
| Interface Type | I2C (2-wire) | SPI (3-wire) | The digital interface must match the host controller's available bus; I2C and SPI are not directly interchangeable without a bus bridge. |
| Package / Mounting | 8-Lead MSOP | 10-Lead MSOP | Different pin counts and footprints affect PCB layout and whether the parts are drop-in compatible. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | The supply range must cover the system rail to ensure correct operation and output swing. |
| Output Type | Voltage output | Voltage output | Voltage-output DACs drive loads directly, while current-output types require an external op-amp, so matching output type is essential for substitution. |
| Reference Input | External reference | External reference | The reference source determines the full-scale output voltage and overall accuracy of the DAC. |
| 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. |
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 | AD5322BRM | AD5321BRMZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | AD5322 | - |
| Number of Bits | 12 | 12 |
| Number of D / A Converters | 2 | - |
| Settling Time | 10µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | I²C |
| Reference Type | External | Supply |
| 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) | ±2, ±0.2 | - |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Number of D/A Converters | - | 1 |
| INL / DNL(LSB) | - | ±2, ±0.3 |
Frequently asked questions
What are the key differences between the AD5321BRMZ and the AD5322BRM?
The AD5321BRMZ is a single-channel, 12-bit voltage-output DAC in a 10-lead MSOP package, while the AD5322BRM is a dual-channel, 12-bit voltage-output DAC in a 10-lead MSOP package. The primary difference is channel count: the AD5321 provides one DAC output, and the AD5322 provides two independent DAC outputs.
Are the AD5321BRMZ and AD5322BRM pin-compatible?
No. Although both devices are offered in a 10-lead MSOP package, their pin functions differ because the AD5322 includes a second DAC output and associated pins. The AD5321BRMZ pinout is not identical to the AD5322BRM pinout, so direct PCB replacement without layout review is not supported.
Do the AD5321BRMZ and AD5322BRM have the same resolution and DAC architecture?
Yes. Both are 12-bit, voltage-output, string DACs. They share the same resolution and basic DAC architecture, but the AD5322 provides two such DAC channels in one package, whereas the AD5321 provides one.
What is the supply voltage range for the AD5321BRMZ and AD5322BRM?
Both devices operate from a single 2.5 V to 5.5 V supply. This wide supply range allows operation in 3 V and 5 V systems, subject to the timing and reference requirements specified in the respective manufacturer datasheets.
What serial interface do the AD5321BRMZ and AD5322BRM use?
Both devices use a 2-wire I2C-compatible serial interface. The interface supports standard and fast modes, and the devices include address pins that allow multiple DACs to be connected on the same bus, subject to the address configuration defined in the datasheets.
Can the AD5321BRMZ be used as a drop-in replacement for the AD5322BRM in an existing design?
No. The AD5322BRM provides two DAC outputs, while the AD5321BRMZ provides only one. In addition, the pinouts and internal register maps differ. A design requiring two DAC channels cannot use the AD5321BRMZ as a direct drop-in replacement without significant redesign.
Do both the AD5321BRMZ and AD5322BRM include an internal reference?
No. Neither the AD5321BRMZ nor the AD5322BRM includes an internal voltage reference. Both require an external reference voltage applied to the REF pin to set the DAC output range. The output voltage is determined by the external reference and the digital code.
What are the operating temperature ranges for the AD5321BRMZ and AD5322BRM?
Both devices are specified for the industrial temperature range of −40°C to +105°C. This makes them suitable for industrial and automotive-adjacent applications that require operation over an extended temperature range, within the limits stated in the manufacturer datasheets.