Part A
AD5321BRM
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 97 PCS
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5322BRMZ and AD5321BRM are both dual-channel 12-bit voltage-output DACs from Analog Devices in the MSOP-8 package, sharing identical resolution, supply range, and interface type. The AD5322BRMZ offers a higher reference input range and wider operating temperature grade, making it a viable functional substitute for the AD5321BRM in most designs, though reference voltage headroom and thermal margin should be validated against the target application.
Resolution
High match
Output Type
High match
Reference Input Range
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD5322BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1406 PCS
- Package
- MSOP-10
- Series
- Acquisição de dados - Convertedores digitais para analógicos (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 | AD5322BRMZ | AD5321BRM | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 1 | Channel count determines how many independent analog outputs the device can drive, directly affecting functional substitutability in multi-channel designs. |
| Resolution | 12 bits | 12 bits | Resolution defines the smallest analog output step; matching resolution preserves output precision when substituting parts. |
| Interface Type | SPI / DSP compatible serial | I2C compatible serial | The digital interface must match the host controller; SPI and I2C are not interchangeable without hardware or firmware changes. |
| Package / Case | 10-Lead MSOP | 8-Lead MSOP | Package footprint and pin count affect PCB layout compatibility and whether a drop-in replacement is possible. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Compatible supply ranges allow the parts to operate in the same system power domain without level shifting. |
| Output Type | Voltage output, buffered | Voltage output, buffered | Buffered voltage outputs can drive loads directly; matching output type ensures similar drive capability and external circuitry needs. |
| Reference Input | External reference | External reference | Both require an external reference, so the same reference source and decoupling scheme can be reused. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Matching temperature ranges ensures both parts meet the same environmental and reliability requirements. |
| Power-Down / Low-Power Mode | Yes, with programmable power-down | Yes, with programmable power-down | Power-down capability affects system power consumption and is important for battery-powered or energy-sensitive 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 | AD5321BRM | AD5322BRMZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Number of Bits | 12 | 12 |
| Number of D / A Converters | 1 | - |
| Settling Time | 10µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | I2C | SPI, DSP |
| Reference Type | Supply | External |
| 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, ±0.3 | - |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | - |
| Base Product Number | AD5321 | - |
| Number of D/A Converters | - | 2 |
| INL / DNL(LSB) | - | ±2, ±0.2 |
Frequently asked questions
What are the main differences between the AD5322BRMZ and the AD5321BRM?
The AD5322BRMZ is a dual 12-bit digital-to-analog converter (DAC) in a 10-lead MSOP package, while the AD5321BRM is a single 12-bit DAC in an 8-lead MSOP package. The AD5322 provides two independent DAC channels, whereas the AD5321 provides one channel. Both are members of the Analog Devices AD53xx family and share a similar serial interface and reference architecture, but they differ in channel count, package size, and pin count.
Are the AD5322BRMZ and AD5321BRM pin-compatible?
No. The AD5322BRMZ uses a 10-lead MSOP package, while the AD5321BRM uses an 8-lead MSOP package. The different pin counts and pin assignments prevent direct pin-to-pin compatibility. A PCB layout designed for one device cannot directly accept the other without modification.
Do the AD5322BRMZ and AD5321BRM have the same resolution and DAC architecture?
Yes. Both devices are 12-bit voltage-output DACs with a resistor-string architecture. They provide the same resolution and similar integral nonlinearity (INL) and differential nonlinearity (DNL) specifications as documented in their respective Analog Devices datasheets. The primary architectural difference is the number of DAC channels: the AD5322 has two, and the AD5321 has one.
Can the AD5322BRMZ be used as a drop-in replacement for the AD5321BRM in an existing design?
No, not as a direct drop-in replacement. Although both are 12-bit DACs from the same family, the AD5322BRMZ has a different package (10-lead MSOP vs. 8-lead MSOP), a different pinout, and an additional DAC channel. The PCB footprint, pin connections, and control logic must be redesigned to accommodate the AD5322BRMZ. Functional substitution may be possible only after validating all electrical and timing parameters against the target design requirements.
What serial interface do the AD5322BRMZ and AD5321BRM use?
Both devices use a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The interface operates at clock rates up to 30 MHz, as specified in the Analog Devices datasheets. The AD5322BRMZ requires additional control bits to address the two DAC channels, while the AD5321BRM uses a simpler command structure for its single channel.
Do the AD5322BRMZ and AD5321BRM operate from the same supply voltage range?
Yes. Both devices operate from a single 2.5 V to 5.5 V supply, as specified in their respective Analog Devices datasheets. They also share similar power-on reset behavior and low power consumption characteristics, making them suitable for portable and battery-powered applications.
What is the package difference between the AD5322BRMZ and the AD5321BRM?
The AD5322BRMZ is housed in a 10-lead MSOP package, while the AD5321BRM is housed in an 8-lead MSOP package. Both packages are RoHS-compliant, as indicated by the "Z" suffix on the AD5322BRMZ. The AD5321BRM does not carry the "Z" suffix in its standard ordering code, though RoHS-compliant versions may be available under different ordering codes. Always verify the specific ordering code for compliance requirements.
Which device should be selected for a design requiring two independent DAC outputs?
The AD5322BRMZ should be selected for designs requiring two independent 12-bit DAC outputs, as it integrates two DAC channels in a single 10-lead MSOP package. The AD5321BRM provides only one DAC channel and would require two devices to achieve the same functionality, consuming more board space and increasing component count. Selection should be based on verified datasheet parameters and system requirements.