Part A
AD5320BRM
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4780 PCS
- Package
- MSOP-8
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD5320BRM and AD5322ARM are not drop-in replacements for each other. Although both are 12-bit DACs from Analog Devices, they differ fundamentally in channel count, digital interface protocol, and package footprint, requiring PCB redesign and firmware changes for substitution.
Different channel count
Different digital interface
Different package footprint
Different reference architecture
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 | AD5322ARM | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 1 | 2 | Determines how many independent analog outputs are available; a single-channel device cannot replace a dual-channel one without additional components. |
| Resolution | 12 bits | 12 bits | Both provide 12-bit resolution, so output granularity and quantization error are equivalent. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Matching serial interfaces allow the same host controller and firmware protocol to drive either device. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.5 V to 5.5 V | The wider lower bound of the AD5322ARM allows operation in lower-voltage systems where the AD5320BRM may not meet the minimum supply requirement. |
| Reference Type | External reference | External reference | Both require an external reference, so the same reference source and decoupling scheme can be reused. |
| Output Voltage Range | 0 V to VREF | 0 V to VREF | Identical output span means the analog signal scaling is the same when using the same reference voltage. |
| Package Type | 8-Lead MSOP | 10-Lead MSOP | Different pin counts and footprints prevent direct drop-in replacement without PCB layout changes. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | The AD5320BRM supports a wider high-temperature range, making it suitable for more demanding industrial environments. |
| Power Consumption (Typical) | 0.7 mW at 3 V | 1.5 mW at 3 V | Lower power consumption of the AD5320BRM is advantageous in battery-powered or energy-sensitive designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5320BRM | AD5322ARM |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 2 |
| Settling Time | 10µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | SPI, DSP |
| Reference Type | Supply | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| INL / DNL(LSB) | ±16 (Max), ±1 (Max) | ±2, ±0.2 |
| 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 AD5320BRM and AD5322ARM?
The AD5320BRM is a single-channel, 12-bit voltage-output DAC in an 8-lead MSOP package, while the AD5322ARM is a dual-channel, 12-bit voltage-output DAC in a 10-lead MSOP package. The AD5320BRM provides one DAC output, whereas the AD5322ARM provides two independent DAC outputs in a slightly larger package.
Are the AD5320BRM and AD5322ARM pin-compatible?
No. The AD5320BRM uses an 8-lead MSOP package, and the AD5322ARM uses a 10-lead MSOP package. The pin counts and pin functions differ, so they are not pin-compatible and cannot be interchanged on the same PCB footprint without redesign.
Do the AD5320BRM and AD5322ARM have the same resolution and DAC architecture?
Yes. Both devices are 12-bit, voltage-output, string DACs. They share the same resolution and basic DAC architecture, but the AD5322ARM integrates two DAC channels while the AD5320BRM integrates one.
What supply voltage and reference configuration do the AD5320BRM and AD5322ARM use?
Both devices operate from a single 2.7 V to 5.5 V supply and use the supply voltage as the reference. Neither device provides a separate external reference input pin, so the output range is referenced to VDD.
What serial interface do the AD5320BRM and AD5322ARM support?
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, allowing high-speed data transfer to the DAC registers.
Can the AD5320BRM be used as a drop-in replacement for the AD5322ARM in an existing design?
No. Because the AD5320BRM is a single-channel DAC in an 8-lead package and the AD5322ARM is a dual-channel DAC in a 10-lead package, they are not drop-in replacements. A design requiring two DAC channels cannot use the AD5320BRM without adding a second device or redesigning the circuit.
What are the operating temperature ranges for the AD5320BRM and AD5322ARM?
Both the AD5320BRM and AD5322ARM are specified for the industrial temperature range of -40°C to +105°C, making them suitable for industrial and automotive-adjacent applications within that range.
How do power consumption and package size compare between the AD5320BRM and AD5322ARM?
Both devices are low-power CMOS DACs. The AD5320BRM typically consumes less total power because it contains one DAC channel, while the AD5322ARM consumes somewhat more due to its two channels. The AD5320BRM in an 8-lead MSOP occupies less board area than the AD5322ARM in a 10-lead MSOP.