Part A
AD5320BRMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3563 個数
- Package
- MSOP-8
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Not a drop-in replacement
The AD5320BRMZ and AD5322ARM are not drop-in replacements for each other. The AD5320BRMZ is a single-channel 12-bit DAC in an MSOP-8 package, while the AD5322ARM is a dual-channel 12-bit DAC in an MSOP-10 package. They differ in channel count, package footprint, pin configuration, and digital interface protocol, requiring a complete board redesign and firmware modification for substitution.
Different channel count
Different package footprint
Different pin configuration
Different interface protocol
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 | AD5322ARM | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 1 | 2 | Determines how many independent analog outputs are available; a single-channel device cannot directly replace a dual-channel one in multi-output designs. |
| Resolution | 12 bits | 12 bits | Both provide 12-bit resolution, so output granularity and setpoint precision are equivalent. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Serial interface compatibility affects whether the DAC can be driven by the existing host controller without protocol changes. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.5 V to 5.5 V | The allowable supply range determines compatibility with the system rail and low-voltage operation. |
| Reference Type | External reference | External reference | Both require an external reference, so the same reference source can be reused if the system already provides one. |
| Output Voltage Range | 0 V to VREF | 0 V to VREF | Defines the usable analog output span and whether the DAC can cover the required signal range. |
| Package Type | 8-Lead MSOP | 10-Lead MSOP | Package footprint and pin count affect PCB layout, assembly, and drop-in compatibility. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +85 °C | The temperature range must meet the application's environmental and reliability requirements. |
| Power-Down Capability | Yes | Yes | Power-down support helps reduce system power consumption when the DAC output is not needed. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5320BRMZ | AD5322ARM |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | 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 AD5320BRMZ and AD5322ARM?
The AD5320BRMZ is a single-channel, 12-bit voltage-output DAC in a 10-lead MSOP package, while the AD5322ARM is a dual-channel, 12-bit voltage-output DAC in a 10-lead MSOP package. The AD5320BRMZ has one DAC output, whereas the AD5322ARM provides two independent DAC outputs in the same package footprint.
Are the AD5320BRMZ and AD5322ARM pin-compatible?
No. Although both devices are offered in a 10-lead MSOP package, their pin functions differ. The AD5320BRMZ uses its pins for a single DAC output, reference input, and related control signals, while the AD5322ARM uses additional pins for the second DAC output and its associated reference and control functions. They cannot be interchanged without PCB redesign.
What is the resolution and output type of each device?
Both the AD5320BRMZ and AD5322ARM are 12-bit voltage-output digital-to-analog converters. Each provides a buffered voltage output capable of driving a load to a specified voltage based on the applied reference and digital code.
What supply voltage range do the AD5320BRMZ and AD5322ARM require?
Both devices operate from a single 2.7 V to 5.5 V supply, as specified in their respective manufacturer datasheets. This wide supply range makes them suitable for both 3 V and 5 V systems.
How do the digital interfaces of the AD5320BRMZ and AD5322ARM differ?
Both devices use a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The AD5320BRMZ has a single DAC register and associated input shift register, while the AD5322ARM includes separate input registers and DAC registers for each of its two channels, allowing independent updates of the two outputs.
Can the AD5320BRMZ be used as a drop-in replacement for the AD5322ARM in an existing dual-channel design?
No. The AD5320BRMZ provides only one DAC channel, while the AD5322ARM provides two. A dual-channel design requiring two independent voltage outputs cannot be satisfied by the single-channel AD5320BRMZ without adding an external second DAC or redesigning the circuit.
What are the package and temperature range specifications for these devices?
Both the AD5320BRMZ and AD5322ARM are available in a 10-lead MSOP package. The AD5320BRMZ is specified over the industrial temperature range of −40°C to +105°C, while the AD5322ARM is specified over the industrial temperature range of −40°C to +85°C, according to their respective datasheets.
Which device is more suitable for applications requiring two independent DAC outputs?
The AD5322ARM is the appropriate choice for applications requiring two independent 12-bit voltage outputs, as it integrates two DAC channels in a single 10-lead MSOP package. The AD5320BRMZ provides only one channel and would require an additional external DAC to achieve the same functionality.