Part A
AD5322BRM
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2754 個数
- 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 AD5322BRM and AD5324ARM-REEL7 are not drop-in replacements for each other. Although both are dual/quad 12-bit DACs from Analog Devices with similar resolution and serial interface architecture, they differ fundamentally in channel count, package footprint, reference architecture, and output configuration. The AD5322BRM is a dual-channel 12-bit DAC in an 8-lead MSOP, while the AD5324ARM-REEL7 is a quad-channel 12-bit DAC in a 10-lead MSOP. These differences in channel density, pin count, and board footprint make direct substitution impractical without significant PCB redesign and firmware adaptation.
Different channel count
Different package footprint
Different reference architecture
Different output configuration
Parts at a glance
Part B
AD5324ARM-REEL7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5234 個数
- Package
- MSOP-10
- Series
- データ取得 - デジタル/アナログコンバータ (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 | AD5322BRM | AD5324ARM-REEL7 | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 4 | Channel count determines how many independent analog outputs are available, directly affecting functional substitutability in multi-channel designs. |
| Resolution | 12 bits | 12 bits | Resolution defines the smallest analog output step; matching resolution is essential for equivalent precision performance. |
| Interface Type | SPI | SPI | The digital interface must match the host controller to allow direct communication without additional glue logic. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Supply voltage compatibility ensures the device can operate within the system's available power rails. |
| Package Type | 8-Lead MSOP | 10-Lead MSOP | Package footprint and pin count affect PCB layout and may require board redesign if not drop-in compatible. |
| Output Type | Voltage Output | Voltage Output | Output type must match the load requirements; voltage-output DACs are used for direct analog voltage generation. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Temperature range determines suitability for industrial or automotive environments and affects reliability. |
| Reference Input | External | External | Reference configuration affects output accuracy and requires matching external reference circuitry. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5322BRM | AD5324ARM-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | - | 4 |
| Settling Time | 10µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | SPI, DSP |
| Reference Type | External | External |
| 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 |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Base Product Number | AD5322 | - |
| Number of D / A Converters | 2 | - |
| INL / DNL (LSB) | ±2, ±0.2 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD5322BRM and AD5324ARM-REEL7?
The AD5322BRM is a dual 12-bit digital-to-analog converter (DAC) in a 10-lead MSOP package, while the AD5324ARM-REEL7 is a quad 12-bit DAC in a 10-lead MSOP package. The AD5322 offers two DAC channels, whereas the AD5324 provides four DAC channels. Both operate from a 2.5 V to 5.5 V supply and feature a serial SPI interface, but the AD5324 includes additional internal reference and power-down modes. The AD5322BRM is specified over the -40°C to +105°C temperature range, while the AD5324ARM-REEL7 is specified over the -40°C to +125°C range.
Can the AD5322BRM and AD5324ARM-REEL7 be used interchangeably in a design?
No, they are not directly interchangeable. The AD5322BRM has two DAC outputs, while the AD5324ARM-REEL7 has four DAC outputs. Pin configurations and register maps differ, so a direct drop-in replacement is not possible without redesigning the PCB and updating firmware. Always verify pinout, package dimensions, and timing specifications against the respective datasheets before considering a substitution.
What is the resolution and number of DAC channels for each device?
Both the AD5322BRM and AD5324ARM-REEL7 are 12-bit DACs. The AD5322BRM provides two independent DAC channels, while the AD5324ARM-REEL7 provides four independent DAC channels. This difference in channel count is a primary selection criterion for multi-channel applications.
What are the supply voltage and reference requirements for these DACs?
Both devices operate from a single supply of 2.5 V to 5.5 V. The AD5322BRM requires an external reference voltage, whereas the AD5324ARM-REEL7 includes an internal 2.5 V reference that can be enabled or disabled. The external reference input range for both is 0 V to VDD. Ensure the reference voltage is stable and within the specified range for accurate conversion.
What serial interface do the AD5322BRM and AD5324ARM-REEL7 use?
Both devices use a 3-wire SPI-compatible serial interface (SYNC, SCLK, and DIN). The AD5324ARM-REEL7 also supports daisy-chain operation and has a SDO pin for readback, while the AD5322BRM does not provide a SDO pin. The maximum clock frequency for both is 30 MHz at 5 V supply. Verify timing requirements in the datasheets for your specific supply voltage.
What are the package and temperature range specifications?
The AD5322BRM is offered in a 10-lead MSOP package and is specified for operation from -40°C to +105°C. The AD5324ARM-REEL7 is also in a 10-lead MSOP package but is specified from -40°C to +125°C. The "REEL7" suffix indicates tape-and-reel packaging for automated assembly. Both packages are RoHS-compliant. Always confirm the exact orderable part number for packaging and temperature grade.
What are the typical applications for each device?
The AD5322BRM is commonly used in portable instrumentation, digital gain and offset adjustment, and programmable voltage sources where two DAC channels suffice. The AD5324ARM-REEL7 is suited for multi-channel applications such as industrial control, automatic test equipment, and data acquisition systems requiring four independent DAC outputs. Selection depends on channel count, reference requirements, and temperature range.
Are the AD5322BRM and AD5324ARM-REEL7 pin-compatible?
No, they are not pin-compatible. Although both use a 10-lead MSOP package, the pin functions differ. The AD5322BRM has two DAC outputs (VOUTA, VOUTB) and no SDO pin, while the AD5324ARM-REEL7 has four DAC outputs (VOUTA, VOUTB, VOUTC, VOUTD) and includes a SDO pin. Refer to the respective pin configurations in the manufacturer datasheets before designing a PCB.
What are the power-down and reset features of these DACs?
Both devices include power-down modes that reduce supply current to typically 0.5 µA at 5 V. The AD5324ARM-REEL7 offers additional power-down modes (1 kΩ, 100 kΩ, and three-state) for each DAC, while the AD5322BRM provides a single power-down mode. Both have a power-on reset circuit that sets the DAC outputs to zero scale or midscale, depending on the model option. Verify the specific reset behavior in the datasheet.