Part A
AD5321BRM
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 97 PCS
- Series
- 데이터 수집 - 다이 모드 변환기(DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5320BRMZ and AD5321BRM are both 12-bit single-channel voltage-output DACs from Analog Devices in the same 8-lead MSOP package, sharing an identical pinout and I²C-compatible serial interface. They are functionally interchangeable in most designs, with the primary distinction being the AD5321BRM's integrated 2.5 V reference versus the AD5320BRMZ's external reference requirement. Designers should confirm reference architecture and supply voltage compatibility before substituting.
Resolution
High match
Package Type
High match
Interface Type
High match
Reference Architecture
Validation required
Parts at a glance
Part B
AD5320BRMZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 3563 PCS
- Package
- MSOP-8
- Series
- 데이터 수집 - 다이 모드 변환기(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 | AD5321BRM | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the smallest analog output step; both are 12-bit, so they offer the same output granularity. |
| Number of DAC Channels | 1 | 1 | Defines how many independent analog outputs are available; both provide a single channel. |
| Interface Type | SPI, QSPI, MICROWIRE, DSP compatible | I2C compatible | The digital interface must match the host controller; SPI and I2C are not directly interchangeable without protocol changes. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.5 V to 5.5 V | Determines compatibility with the system power rail; the AD5321 supports a slightly lower minimum supply. |
| Output Voltage Range | 0 V to VREF | 0 V to VREF | Sets the analog output span relative to the reference; both provide rail-to-rail output up to VREF. |
| Reference Input | External | External | An external reference allows the output range to be scaled; both require an external reference voltage. |
| Package Type | 8-Lead MSOP | 8-Lead MSOP | Footprint and assembly compatibility depend on the package; both use the same 8-lead MSOP outline. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Defines the environmental limits for reliable operation; both cover the same industrial temperature range. |
| Power-Down Current | 0.2 µA typical | 0.2 µA typical | Affects standby power consumption in portable or low-power systems; both offer very low power-down current. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5321BRM | AD5320BRMZ |
|---|---|---|
| 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 | 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 AD5320BRMZ and the AD5321BRM?
The AD5320BRMZ is a 12-bit, single-channel, voltage-output DAC in a 10-lead MSOP package, while the AD5321BRM is an 8-bit, single-channel, voltage-output DAC in a 10-lead MSOP package. The primary difference is resolution: 12 bits versus 8 bits. Both are members of the Analog Devices AD532x family and share a similar serial interface and general architecture, but the AD5320 offers higher resolution and therefore finer output granularity.
Are the AD5320BRMZ and AD5321BRM pin-compatible?
Yes. Both devices are offered in the same 10-lead MSOP (RM) package and share the same pinout, which includes VDD, VOUT, GND, SYNC, SCLK, DIN, and reference-related pins. This pin compatibility allows a common PCB footprint, but the designer must still verify all electrical and functional differences before substituting one for the other.
What is the resolution and number of DAC channels for each device?
The AD5320BRMZ provides 12-bit resolution with one voltage-output DAC channel. The AD5321BRM provides 8-bit resolution with one voltage-output DAC channel. Both are single-channel devices, so the channel count is identical; only the resolution differs.
Do the AD5320BRMZ and AD5321BRM use the same digital interface?
Yes. Both devices use a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The interface consists of SYNC, SCLK, and DIN pins. Because the AD5320 has 12-bit resolution and the AD5321 has 8-bit resolution, the number of clock cycles required to load a data word differs, so the host controller firmware must be adjusted accordingly.
What are the supply voltage and reference requirements for these DACs?
Both the AD5320BRMZ and AD5321BRM operate from a single 2.7 V to 5.5 V supply. They use an external reference voltage applied to the REF pin, and the output voltage range is determined by that external reference. The reference input range and the resulting output span must be verified against the respective datasheets for the target application.
Can the AD5321BRM be used as a drop-in replacement for the AD5320BRMZ in an existing design?
Not directly. Although the packages and pinouts are compatible, the AD5321BRM has 8-bit resolution versus 12-bit resolution in the AD5320BRMZ. This changes the transfer function, the number of serial clock cycles per conversion, and the effective output step size. Firmware and system accuracy requirements must be re-evaluated before any substitution.
What are the operating temperature ranges for the AD5320BRMZ and AD5321BRM?
Both devices are specified for the industrial temperature range of −40°C to +105°C. This is a standard specification for the BRM grade in the AD532x family and should be confirmed against the latest Analog Devices datasheet for the specific revision and package option.
Which device is more suitable for high-precision applications?
The AD5320BRMZ is more suitable for high-precision applications because it provides 12-bit resolution, resulting in 4096 output steps, compared with 256 output steps for the 8-bit AD5321BRM. For a given reference voltage, the AD5320BRMZ offers a smaller least significant bit (LSB) size and finer output control, which is preferable when tight output accuracy or small setpoint increments are required.