Part A
AD5321BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3782 PCS
- Package
- MSOP-8
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5320BRMZ and AD5321BRMZ are functionally compatible single-channel 12-bit DACs sharing the same MSOP-8 footprint and supply range, making the AD5321BRMZ a viable replacement candidate for the AD5320BRMZ in most designs. The primary distinction lies in the digital interface: the AD5320BRMZ uses a standard SPI interface, while the AD5321BRMZ employs an I²C-compatible interface, so host firmware and bus routing must be validated before substitution.
Resolution
High match
Package Type
High match
Digital Interface
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
AD5320BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3563 PCS
- Package
- MSOP-8
- Series
- Acquisition de données - convertisseur numérique - analogique (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 | AD5320BRMZ | AD5321BRMZ | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the smallest analog output step; identical resolution means equivalent output granularity. |
| Number of DAC Channels | 1 | 1 | Both are single-channel DACs, so channel count does not affect substitutability. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | I2C compatible | The digital interface must match the host controller; SPI versus I2C makes them non-drop-in replacements. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply range allows use in the same system power rails. |
| Output Type | Voltage output, buffered | Voltage output, buffered | Both provide buffered voltage outputs, so the analog signal chain topology is the same. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Identical package and pin count simplify PCB layout and physical replacement. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Same temperature grade ensures both can be used in the same environmental conditions. |
| Reference Configuration | External reference | Internal reference | Reference source affects accuracy, external component count, and output scaling; this is a key functional difference. |
| INL (Integral Nonlinearity) | ±1 LSB max | ±1 LSB max | Matching linearity specifications indicate comparable accuracy performance. |
| Power Supply Current | 140 µA typ at 3 V | 140 µA typ at 3 V | Similar supply current means comparable power consumption in portable and low-power designs. |
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 | AD5321BRMZ | AD5320BRMZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 10µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | I²C | SPI, DSP |
| Reference Type | Supply | Supply |
| Voltage - Supply, Analog | 2.5V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.5V ~ 5.5V | 2.7V ~ 5.5V |
| INL / DNL(LSB) | ±2, ±0.3 | ±16 (Max), ±1 (Max) |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What are the key differences between the AD5320BRMZ and AD5321BRMZ?
The AD5320BRMZ is a single-channel, 12-bit voltage-output DAC with an SPI-compatible serial interface, while the AD5321BRMZ is a single-channel, 12-bit voltage-output DAC with an I2C-compatible serial interface. Both are offered in an 8-lead MSOP package and operate from a 2.7 V to 5.5 V supply, but they differ in digital interface protocol and related timing and pin functions.
Are the AD5320BRMZ and AD5321BRMZ pin-compatible?
No. Although both devices are housed in an 8-lead MSOP package, their pin functions differ because the AD5320BRMZ uses an SPI interface and the AD5321BRMZ uses an I2C interface. The serial data input, clock, and address/control pins are not functionally equivalent, so the PCB layout and connections must be designed for the specific interface of each part.
Can the AD5320BRMZ and AD5321BRMZ be used interchangeably in the same design?
No, they cannot be used interchangeably without design changes. The AD5320BRMZ requires an SPI-compatible host controller with separate chip-select, clock, and data lines, whereas the AD5321BRMZ requires an I2C-compatible bus with clock and bidirectional data lines plus device address configuration. The digital interface, pinout, and firmware must be adapted accordingly.
Do the AD5320BRMZ and AD5321BRMZ have the same resolution and output type?
Yes. Both the AD5320BRMZ and AD5321BRMZ are 12-bit, single-channel, voltage-output digital-to-analog converters. They provide a buffered voltage output and are specified for operation from a 2.7 V to 5.5 V single supply, making them suitable for similar precision control applications where the digital interface is the primary differentiator.
What supply voltage range do the AD5320BRMZ and AD5321BRMZ support?
Both the AD5320BRMZ and AD5321BRMZ are specified for a single-supply operating range of 2.7 V to 5.5 V. This allows them to be used in 3 V and 5 V systems, and the output voltage range is referenced to the supply and the applied reference, depending on the specific configuration described in the manufacturer datasheet.
Which serial interface does each device use for communication?
The AD5320BRMZ uses an SPI-compatible serial interface, supporting standard clock polarity and phase modes and a dedicated chip-select input. The AD5321BRMZ uses an I2C-compatible serial interface, supporting standard and fast modes with a device address that allows multiple devices on the same bus. The choice between them depends on the host controller and system bus architecture.
Are the AD5320BRMZ and AD5321BRMZ available in the same package and temperature range?
Both devices are offered in an 8-lead MSOP package, commonly denoted by the RMZ suffix, and are specified for the industrial temperature range of -40°C to +105°C. Package and temperature grade alone do not make them interchangeable because the digital interface and pin functions remain different.
What should be considered when migrating a design from the AD5320BRMZ to the AD5321BRMZ?
Migration requires changing the host interface from SPI to I2C, updating the PCB pin connections, and revising firmware to handle I2C addressing, start/stop conditions, and acknowledge bits. The analog output range and resolution remain 12 bits, but the reference configuration and output amplifier behavior should be verified against the respective manufacturer datasheets before finalizing the design.