Part A
AD5420AREZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2718 個数
- Package
- TSSOP-24
- 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 AD5420AREZ and AD5428YRUZ are not functionally interchangeable. The AD5420AREZ is a single-channel 16-bit current-output DAC with HART connectivity, while the AD5428YRUZ is a dual-channel 8-bit voltage-output DAC with parallel interface. They differ in resolution, output type, channel count, and digital interface, requiring complete circuit redesign for substitution.
Different output type
Different resolution
Different channel count
Different digital interface
Parts at a glance
Part B
AD5428YRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4183 個数
- Package
- TSSOP-20
- 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 | AD5420AREZ | AD5428YRUZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 8 bit | Higher resolution allows finer analog output steps, which is critical for precision control applications. |
| Number of DAC Channels | 1 | 2 | Channel count determines how many independent analog outputs can be driven by a single device. |
| Output Type | Current (4 mA to 20 mA) | Voltage (unbuffered) | Current-loop versus voltage output dictates the interface type and compatibility with downstream circuitry. |
| Supply Voltage Range | 10.8 V to 40 V (AVDD) | 2.5 V to 5.5 V | Supply range must match the system power rails for proper operation and level compatibility. |
| Interface Type | SPI | Parallel | The digital interface must be compatible with the host controller's available bus. |
| Package / Mounting | 24-Lead TSSOP | 20-Lead TSSOP | Package footprint and pin count affect PCB layout and cannot be substituted without redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | Temperature range determines suitability for industrial or automotive environments. |
| Typical INL | ±0.01 % FSR | ±0.25 LSB | Integral nonlinearity indicates accuracy of the DAC transfer function. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5420AREZ | AD5428YRUZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 8 |
| Number of D/A Converters | 1 | 2 |
| Settling Time | 40µs | 120ns |
| Output Type | Current - Buffered | Current - Unbuffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | Parallel |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 10.8V ~ 40V | 2.5V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| INL / DNL(LSB) | -, ±1 (Max) | ±0.25 (Max), ±1 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the primary functional differences between the AD5420AREZ and the AD5428YRUZ?
The AD5420AREZ is a single-channel, 16-bit, serial-input, 4-20 mA current-loop DAC designed for industrial process control. The AD5428YRUZ is a dual-channel, 8-bit, parallel-input, voltage-output DAC. They differ in resolution, number of channels, output type, and digital interface.
Are the AD5420AREZ and AD5428YRUZ pin-to-pin or package compatible?
No. The AD5420AREZ is supplied in a 24-lead TSSOP (RE-24-1) package, while the AD5428YRUZ is supplied in a 20-lead TSSOP (RU-20) package. Pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements.
Can the AD5420AREZ and AD5428YRUZ operate from the same supply voltage?
No. The AD5420AREZ requires an AVDD supply of 10.8 V to 40 V (or 5 V ± 5% for some configurations) and a DVDD of 2.7 V to 5.5 V. The AD5428YRUZ operates from a single 2.5 V to 5.5 V supply. Their supply requirements are not interchangeable.
What is the output resolution and channel count of each device?
The AD5420AREZ provides one channel with 16-bit resolution and a 4-20 mA current output. The AD5428YRUZ provides two channels with 8-bit resolution and voltage outputs.
Do the AD5420AREZ and AD5428YRUZ use the same digital interface?
No. The AD5420AREZ uses a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. The AD5428YRUZ uses a parallel interface with 8-bit data loading. Interface timing and control signals are not compatible.
Are the AD5420AREZ and AD5428YRUZ interchangeable in a 4-20 mA current-loop application?
No. Only the AD5420AREZ provides a 4-20 mA current-loop output. The AD5428YRUZ provides voltage outputs and cannot directly drive a 4-20 mA current loop without external signal conditioning circuitry.
What are the operating temperature ranges for the AD5420AREZ and AD5428YRUZ?
Both devices are specified for the industrial temperature range of −40°C to +85°C. However, this parameter alone does not make them functionally equivalent or interchangeable.
Which device is better suited for multi-channel voltage-output control systems?
The AD5428YRUZ is better suited for multi-channel voltage-output control because it integrates two 8-bit voltage-output DAC channels in a single package. The AD5420AREZ provides only a single current-output channel.