Part A
AD5324BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6981 PCS
- Package
- MSOP-10
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Not a drop-in replacement
The AD5321BRMZ and AD5324BRMZ are not drop-in replacements for each other. Although both are 12-bit voltage-output DACs from Analog Devices in the same MSOP-8 package and share a similar serial interface, they differ fundamentally in channel count, reference architecture, and internal register map. The AD5321BRMZ is a single-channel DAC that derives its reference from the supply, while the AD5324BRMZ is a quad-channel DAC with an external reference input and separate reference pins. These architectural differences prevent direct substitution without circuit redesign, and the two devices cannot be interchanged on an existing PCB without verifying reference, addressing, and output configuration requirements.
Different channel count
Different reference architecture
Different pin function assignment
Different register map
Parts at a glance
Part B
AD5321BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3782 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 | AD5321BRMZ | AD5324BRMZ | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 1 | 4 | Determines how many independent analog outputs are available; a single-channel part cannot directly replace a quad-channel part in multi-output designs. |
| Resolution | 12 bits | 12 bits | Both provide 12-bit resolution, so output granularity and accuracy class are equivalent. |
| Interface Type | I2C (2-wire) | SPI (3-wire) | The digital communication protocol must match the host controller; I2C and SPI are not directly interchangeable without interface changes. |
| Package / Pin Count | 8-lead MSOP | 10-lead MSOP | Different package footprints and pin counts affect PCB layout and cannot be drop-in substituted without board redesign. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Both operate over the same supply range, allowing use in similar low-voltage systems. |
| Output Type | Voltage output | Voltage output | Both provide voltage-mode outputs, so the signal type is compatible with the same downstream circuitry. |
| Reference Type | External reference | External reference | Both require an external reference, so reference design and accuracy depend on the same external components. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Identical temperature ratings mean both are suitable for the same industrial temperature environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5324BRMZ | AD5321BRMZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 4 | 1 |
| 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 | ±2, ±0.3 |
| 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 AD5321BRMZ and AD5324BRMZ?
The AD5321BRMZ is a single-channel, 12-bit voltage-output DAC in a 10-lead MSOP package, while the AD5324BRMZ is a quad-channel, 12-bit voltage-output DAC in a 10-lead MSOP package. The AD5321 provides one DAC output, whereas the AD5324 provides four independent DAC outputs in the same package footprint.
Do the AD5321BRMZ and AD5324BRMZ have the same resolution and interface?
Yes. Both devices are 12-bit DACs with a 2-wire I2C-compatible serial interface supporting standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes. Both operate from a single 2.5 V to 5.5 V supply.
Are the AD5321BRMZ and AD5324BRMZ pin-compatible?
No. Although both are offered in a 10-lead MSOP package, their pinouts differ because the AD5324 requires additional pins for its four DAC outputs and reference connections. The AD5321 has a single VOUT pin, while the AD5324 has VOUTA, VOUTB, VOUTC, and VOUTD pins. They are not direct drop-in replacements.
What is the output voltage range of the AD5321BRMZ and AD5324BRMZ?
Both devices provide a rail-to-rail voltage output that swings from 0 V to the reference input voltage (VREF). The output amplifier gain is configured as 1 or 2 via the internal gain setting, allowing output spans of 0 to VREF or 0 to 2×VREF, depending on the reference and supply configuration.
Can the AD5321BRMZ be used as a substitute for the AD5324BRMZ in an existing design?
No. The AD5321BRMZ provides only one DAC channel, while the AD5324BRMZ provides four. Substitution would require significant redesign to accommodate the reduced channel count, different pinout, and different PCB layout. The AD5324 also includes additional features such as a hardware LDAC pin and separate reference pins for each DAC.
What are the operating temperature ranges for the AD5321BRMZ and AD5324BRMZ?
Both the AD5321BRMZ and AD5324BRMZ are specified for the industrial temperature range of −40°C to +105°C, as documented in the Analog Devices datasheets for these products.
Do the AD5321BRMZ and AD5324BRMZ include an internal reference?
No. Neither the AD5321BRMZ nor the AD5324BRMZ includes an internal voltage reference. Both require an external reference voltage applied to the VREF pin (or pins) to set the DAC output full-scale range.
What are the power supply requirements for the AD5321BRMZ and AD5324BRMZ?
Both devices operate from a single supply voltage ranging from 2.5 V to 5.5 V. The AD5324BRMZ typically consumes more supply current than the AD5321BRMZ due to its four DAC channels, but both are designed for low-power operation in portable and industrial applications.