Part A
AD5422BREZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5465 ПКС
- Series
- Сбор данных - цифровые в аналоговые преобразователи (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
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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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.