Part A
AD5321BRM
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 97 Stückzahl
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5320BRM and AD5321BRM are functionally compatible 12-bit single-channel DACs sharing the same MSOP-8 footprint and supply range, making the AD5321BRM a viable replacement candidate for the AD5320BRM in most designs. However, the AD5321BRM draws significantly lower supply current, so engineers should verify that the reduced power consumption does not affect application-specific behavior before committing to the substitution.
Resolution
High match
Package Type
High match
Supply Voltage Range
High match
Supply Current
Validation required
Parts at a glance
Part B
AD5320BRM
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4780 Stückzahl
- Package
- MSOP-8
- Series
- Data Acquisition von 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 | AD5320BRM | AD5321BRM | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the smallest output voltage step the DAC can produce; identical resolution means equivalent output granularity. |
| Number of DAC Channels | 1 | 1 | Both are single-channel DACs, so they match in the number of independent analog outputs required by the design. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | I2C compatible | The digital communication protocol must match the host controller; SPI and I2C are not directly interchangeable without interface changes. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the compatible power rails; identical ranges allow the same supply design to be reused. |
| Output Voltage Range | 0 V to VDD | 0 V to VDD | Determines the span of the analog output signal relative to the supply; matching ranges preserve signal scaling. |
| Reference Type | External | External | Both require an external reference, so the same reference circuitry and accuracy budget can be applied. |
| Package / Mounting | 8-Lead MSOP (RM), Surface Mount | 8-Lead MSOP (RM), Surface Mount | Identical package and footprint allow drop-in board placement without layout changes. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Ensures both parts meet the same environmental requirements for industrial-grade applications. |
| INL (Integral Nonlinearity) | ±16 LSB max | ±16 LSB max | Specifies worst-case deviation from an ideal transfer function; matching INL means comparable accuracy performance. |
| Power-Down Current | 0.2 µA typ at 5 V | 0.2 µA typ at 5 V | Affects standby power consumption in battery-powered or low-power systems; identical values indicate equivalent power-down behavior. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5321BRM | AD5320BRM |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| 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 | 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 | - |
| 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 | - | 1 |
| INL / DNL(LSB) | - | ±16 (Max), ±1 (Max) |
Frequently asked questions
What are the key differences between the AD5320BRM and AD5321BRM?
The AD5320BRM and AD5321BRM are both 12-bit, single-channel, voltage-output DACs from Analog Devices in an 8-lead MSOP package. The primary difference is the digital interface: the AD5320BRM uses a standard 3-wire SPI-compatible interface, while the AD5321BRM uses an I2C-compatible 2-wire interface. Both operate from a 2.7 V to 5.5 V supply and offer similar DAC performance specifications.
Are the AD5320BRM and AD5321BRM pin-compatible?
No. Although both devices are housed in the same 8-lead MSOP package, their pin functions differ because of the different digital interfaces. The AD5320BRM uses pins for SYNC, SCLK, and DIN (SPI), while the AD5321BRM uses pins for SDA and SCL (I2C). Therefore, they are not directly pin-compatible and cannot be interchanged without PCB redesign.
Can the AD5320BRM and AD5321BRM be used interchangeably in an existing design?
No. Because the digital interface protocols and pin assignments differ, the two devices are not drop-in replacements for each other. A design using the AD5320BRM (SPI) cannot directly accept the AD5321BRM (I2C) without changes to both the PCB layout and the controlling firmware or software.
What is the resolution and number of DAC channels for both devices?
Both the AD5320BRM and AD5321BRM are 12-bit resolution, single-channel (1 DAC) voltage-output digital-to-analog converters. This is confirmed in the Analog Devices datasheets for both parts.
What supply voltage range do the AD5320BRM and AD5321BRM support?
Both devices operate from a single supply voltage ranging from 2.7 V to 5.5 V, as specified in their respective Analog Devices datasheets. This wide supply range makes them suitable for both 3 V and 5 V systems.
Do the AD5320BRM and AD5321BRM have the same package and operating temperature range?
Yes. Both the AD5320BRM and AD5321BRM are offered in an 8-lead MSOP package and are specified for the industrial temperature range of −40°C to +105°C, according to their Analog Devices datasheets.
Which device should be selected for an I2C-based system, and which for an SPI-based system?
For an I2C-based system, the AD5321BRM should be selected because it features an I2C-compatible 2-wire serial interface. For an SPI-based system, the AD5320BRM should be selected because it features a 3-wire SPI-compatible serial interface. Selection depends entirely on the host controller's available communication bus.