Part A
AD5544BRSZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7094 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5547BRUZ and AD5544BRSZ are both quad-channel 16-bit current-output DACs from Analog Devices, but they differ in digital interface, reference architecture, and package. The AD5547BRUZ offers a parallel interface with integrated feedback resistors and operates from a single 2.7 V to 5.5 V supply, while the AD5544BRSZ provides a serial SPI interface with external reference inputs and requires dual supplies. Direct drop-in substitution is not possible without interface and reference redesign, but functional replacement is achievable in applications where the host controller and reference circuitry can be adapted.
Digital Interface
Validation required
Reference Architecture
Validation required
Package Type
Not compatible
Resolution and Channel Count
High match
Parts at a glance
Part B
AD5547BRUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1919 PCS
- Package
- TSSOP-38
- Series
- Data Acquisition - 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 | AD5547BRUZ | AD5544BRSZ | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 2 | 4 | Channel count determines how many independent analog outputs the system can drive, directly affecting board layout and whether the part is a functional substitute. |
| Resolution | 16 bits | 16 bits | Resolution sets the smallest output step and achievable precision; matching resolution is essential for equivalent accuracy in the target application. |
| DAC Architecture | R-2R current output | R-2R current output | Architecture influences settling behavior, output configuration, and the external op-amp circuitry required to convert current to voltage. |
| Interface Type | Parallel | SPI / Serial | The digital interface must match the host controller; a parallel-to-serial difference typically prevents drop-in substitution without redesign. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range must be compatible with the system rails to ensure correct operation and signal swing. |
| Package | 28-Lead TSSOP | 28-Lead SSOP | Package footprint and pinout affect PCB layout; differing packages usually require a board revision for substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment to guarantee specified performance and reliability. |
| Reference Input | External | External | External reference requirements determine the accuracy and stability achievable and whether the reference circuitry can be reused. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5544BRSZ | AD5547BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 4 | 2 |
| Settling Time | 900ns (Typ) | 500ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | No | No |
| Data Interface | SPI | Parallel |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| INL / DNL(LSB) | ±1 (Max), ±1 (Max) | ±2 (Max), ±1 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD5547BRUZ and AD5544BRSZ?
The AD5547BRUZ is a dual-channel, 16-bit, current-output parallel-input DAC in a 28-lead TSSOP package, while the AD5544BRSZ is a quad-channel, 16-bit, current-output serial-input DAC in a 28-lead SSOP package. The AD5547 offers higher update rates and parallel interface, whereas the AD5544 provides four independent DAC channels with a serial interface.
Are the AD5547BRUZ and AD5544BRSZ pin-compatible?
No. The AD5547BRUZ uses a 28-lead TSSOP package, and the AD5544BRSZ uses a 28-lead SSOP package. They have different pinouts and package dimensions, so they are not pin-compatible or directly interchangeable on the same PCB footprint.
What is the resolution and number of DAC channels for each device?
Both devices offer 16-bit resolution. The AD5547BRUZ provides two independent current-output DAC channels, while the AD5544BRSZ provides four independent current-output DAC channels.
What digital interface does each DAC use?
The AD5547BRUZ uses a parallel digital interface for loading DAC data. The AD5544BRSZ uses a serial (SPI-compatible) interface. This difference affects microcontroller pin count, PCB routing, and firmware design.
Can the AD5547BRUZ and AD5544BRSZ operate from the same supply voltages?
Both devices are specified for operation with a 2.7 V to 5.5 V digital supply and typically require an external reference and op-amp for voltage output. However, always verify the exact supply and reference requirements in the respective manufacturer datasheets, as absolute maximum ratings and recommended operating conditions may differ.
Which device is better for applications requiring multiple DAC channels with minimal digital I/O?
The AD5544BRSZ is better suited for multi-channel applications with limited digital I/O because it integrates four DAC channels and uses a serial interface, reducing pin count and routing complexity compared to the dual-channel, parallel-interface AD5547BRUZ.
Are the AD5547BRUZ and AD5544BRSZ drop-in replacements for each other?
No. Due to differences in package type, pinout, channel count, and digital interface, they are not drop-in replacements. Any substitution requires a complete design review, including PCB layout changes, firmware updates, and validation against the target specifications.