Part A
AD5422BREZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5465 PCS
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Not a drop-in replacement
The AD5422BREZ and AD5428YRU are not functionally interchangeable. The AD5422BREZ is a single-channel 16-bit current/voltage output DAC with an integrated HART modem interface and on-chip voltage reference, while the AD5428YRU is a dual-channel 8-bit current-output DAC with no voltage output mode and no HART connectivity. They differ fundamentally in resolution, channel count, output configuration, and interface architecture, so direct substitution is not feasible without a complete circuit redesign.
Different resolution
Different channel count
Different output type
Different interface
Parts at a glance
Part B
AD5428YRU
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3733 PCS
- Package
- TSSOP-20
- Series
- Acquisition de données - convertisseur numérique - analogique (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 | AD5422BREZ | AD5428YRU | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 8 bit | Higher resolution allows finer analog output steps, directly affecting output accuracy and precision in the target application. |
| Number of DAC Channels | 1 | 2 | Channel count determines how many independent analog outputs can be driven, affecting system architecture and board space. |
| Output Type | Current and Voltage | Voltage | Current-loop outputs are required for industrial 4-20 mA interfaces, while voltage-only outputs suit different signal chain requirements. |
| Interface Type | SPI | Parallel | The digital interface must match the host controller, so an SPI-to-parallel difference typically prevents direct drop-in substitution. |
| Supply Voltage | 2.7 V to 5.5 V (digital), up to 40 V (analog) | 2.5 V to 5.5 V | Supply requirements dictate power supply design and compatibility with existing rails in the system. |
| Package / Mounting | 24-Lead TSSOP (Surface Mount) | 20-Lead TSSOP (Surface Mount) | Different pin counts and footprints prevent direct PCB replacement without layout changes. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +85 °C | The temperature range determines suitability for industrial or automotive environments with wide thermal excursions. |
| INL (Integral Nonlinearity) | ±0.012 % FSR | ±0.25 LSB | INL defines the maximum deviation from an ideal transfer function, directly impacting achievable accuracy. |
| Reference Type | Internal and External | External | An internal reference simplifies design and reduces external component count, while external-only references offer more flexibility. |
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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 | AD5422BREZ | AD5428YRU |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 8 |
| Number of D/A Converters | - | 2 |
| Settling Time | 25µs (V), 40µs (A) (Typ) | 120ns |
| Output Type | Voltage or Current - Buffered | Current - Unbuffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | Parallel |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 10.8V ~ 40V, -3V ~ 26.4V | 2.5V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| INL / DNL(LSB) | - | ±0.25 (Max), ±1 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 125°C |
| Base Product Number | AD5422 | - |
| Number of D / A Converters | 1 | - |
| INL / DNL (LSB) | -, ±1.3 (Max) | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
Are the AD5422BREZ and AD5428YRU interchangeable in a design?
No. The AD5422BREZ is a single-channel, 16-bit, serial-input, voltage and current output DAC with an integrated precision reference and HART connectivity, while the AD5428YRU is a dual-channel, 8-bit, parallel-input, voltage-output DAC. Their resolution, channel count, interface type, output configuration, and package differ, so they are not pin- or function-compatible substitutes.
What is the resolution and channel count of each device?
The AD5422BREZ provides one 16-bit DAC channel. The AD5428YRU provides two 8-bit DAC channels.
What digital interface does each DAC use?
The AD5422BREZ uses a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. The AD5428YRU uses a parallel interface with an 8-bit data bus.
What output types are available on each part?
The AD5422BREZ supports both voltage output and current output, including 0 mA to 20 mA, 4 mA to 20 mA, 0 V to 5 V, 0 V to 10 V, and ±10 V ranges. The AD5428YRU provides voltage output only.
Do these devices include an internal reference?
The AD5422BREZ includes an integrated 5 V, 10 ppm/°C precision reference. The AD5428YRU does not include an internal reference and requires an external reference voltage.
What are the package and pin-count differences?
The AD5422BREZ is offered in a 24-lead TSSOP package. The AD5428YRU is offered in a 20-lead TSSOP package. The different pin counts and pin functions prevent direct PCB replacement.
Which device is better suited for industrial current-loop applications?
The AD5422BREZ is suited for industrial current-loop applications because it integrates current-output ranges, HART connectivity, and a precision reference. The AD5428YRU is a voltage-output DAC and does not provide a current-loop output stage.
Can the AD5428YRU replace the AD5422BREZ in an existing 16-bit design?
No. The AD5428YRU has 8-bit resolution and two channels, while the AD5422BREZ has 16-bit resolution and one channel. Replacing the AD5422BREZ with the AD5428YRU would reduce resolution, change the channel count, and require a different interface and output stage.