Part A
AD5447YRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4134 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
Compatible functional replacement candidate
The AD5447YRUZ and AD5440YRU are both dual-channel 12-bit current-output DACs from Analog Devices in the same TSSOP-24 package, sharing identical resolution, channel count, and digital interface architecture. The AD5447YRUZ offers higher reference input and analog supply voltage ranges, making it a viable functional replacement candidate for the AD5440YRU in most designs, provided the system operates within the AD5440YRU's narrower supply and reference limits. Designers should verify the reference voltage headroom and supply rail compatibility before substituting.
Resolution
High match
Channel Count
High match
Package Type
High match
Supply Voltage Range
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5447YRUZ | AD5440YRU | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 10 bit | Higher resolution provides finer output granularity, directly affecting achievable accuracy and step size in the target application. |
| Number of D/A Converters | 2 | 2 | Dual-channel devices allow two independent analog outputs from a single package, saving board space and cost. |
| Settling Time | 80 ns | 30 ns | Faster settling enables higher update rates and better dynamic performance in waveform generation and control loops. |
| Interface Type | Parallel | Parallel | The digital interface must match the host controller to ensure correct data transfer and timing. |
| Supply Voltage (Analog) | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Compatible supply ranges allow the same power rail to be used, simplifying system design and ensuring interoperability. |
| Reference Input Range | ±10 V | ±10 V | The reference input range determines the full-scale output span and must match the system's signal requirements. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Industrial temperature range ensures reliable operation in harsh environments and automotive/industrial applications. |
| Package / Case | 16-TSSOP | 16-TSSOP | Identical package and pinout allow drop-in replacement without PCB redesign. |
| INL (Integral Nonlinearity) | ±1 LSB | ±0.5 LSB | Lower INL indicates better absolute accuracy, which is critical for precision measurement and control applications. |
| Power Dissipation | 0.5 mW | 0.5 mW | Low power dissipation is essential for portable and battery-powered designs, affecting thermal management and battery life. |
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 | AD5447YRUZ | AD5440YRU |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 10 |
| Number of D/A Converters | 2 | 2 |
| Settling Time | 120ns | 120ns |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | No | No |
| Data Interface | Parallel | Parallel |
| 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) | ±1 (Max), -1/+2 (Max) | ±0.5 (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 AD5447YRUZ and the AD5440YRU?
The AD5447YRUZ is a dual 12-bit current-output digital-to-analog converter (DAC) in a 24-lead TSSOP package, while the AD5440YRU is a dual 10-bit current-output DAC in a 24-lead TSSOP package. The primary difference is resolution: 12 bits versus 10 bits. Both share the same pinout and package footprint, but the AD5447YRUZ offers four times the resolution of the AD5440YRU.
Are the AD5447YRUZ and AD5440YRU pin-compatible?
Yes. Both devices are offered in the same 24-lead TSSOP package and share an identical pinout. This allows the AD5447YRUZ to be used as a higher-resolution drop-in replacement for the AD5440YRU in existing 24-lead TSSOP layouts, provided the system can accommodate the tighter linearity and settling specifications of the 12-bit part.
What is the resolution and channel count of each device?
The AD5447YRUZ provides two independent 12-bit DAC channels. The AD5440YRU provides two independent 10-bit DAC channels. Both are dual-channel, current-output multiplying DACs designed for applications requiring digital-to-analog conversion with an external reference.
Do both parts support the same digital interface?
Yes. Both the AD5447YRUZ and AD5440YRU use a parallel digital interface with 12-bit and 10-bit data buses respectively. The AD5447YRUZ accepts 12-bit parallel data, while the AD5440YRU accepts 10-bit parallel data. Both include readback capability and are compatible with standard microprocessor buses.
What are the reference input and output voltage characteristics?
Both devices are multiplying DACs that operate with an external reference voltage. The AD5447YRUZ and AD5440YRU accept a reference input range typically from -10 V to +10 V, and the output current is proportional to the product of the reference voltage and the digital input code. The output amplifier configuration determines the final voltage output range.
What are the operating temperature ranges for these devices?
Both the AD5447YRUZ and AD5440YRU are specified for the industrial temperature range of -40°C to +125°C. The Y grade suffix in both part numbers indicates this industrial temperature range, making them suitable for harsh-environment applications.
Can the AD5447YRUZ directly replace the AD5440YRU in an existing design?
In many cases yes, because both share the same 24-lead TSSOP package and pinout. However, the AD5447YRUZ provides 12-bit resolution versus 10-bit for the AD5440YRU, so the digital interface must supply 12-bit data. The system firmware and timing must be validated to ensure the additional two data bits are properly driven and that the higher resolution does not introduce unwanted behavior in the control loop.
What are the typical applications for these dual current-output DACs?
Both the AD5447YRUZ and AD5440YRU are used in applications such as industrial process control, programmable logic controllers, digital gain and offset adjustment, and waveform generation. The AD5447YRUZ is preferred where higher resolution (12-bit) is required, while the AD5440YRU suits cost-sensitive designs where 10-bit resolution is sufficient.