Part A
AD9744ARUZRL7
ADI公司
- Lifecycle
- Active
- Stock
- 3270 件
- Package
- TSSOP-28
- Series
- 資料獲取-數模轉換器（DAC）
Replacement verdict
Compatible functional replacement candidate
The AD9744ARUZRL7 and AD9742ARZRL are both 14-bit high-speed TxDAC converters from Analog Devices with matching resolution, supply architecture, and digital interface, making the AD9742ARZRL a viable functional substitute for the AD9744ARUZRL7 in many designs. However, the two parts differ in package footprint and maximum update rate, so the replacement should be validated against the target board layout and timing budget before adoption.
Resolution
High match
Digital Interface
High match
Package Type
Validation required
Maximum Update Rate
Validation required
Parts at a glance
Part B
AD9742ARZRL
ADI公司
- Lifecycle
- Active
- Stock
- 787 件
- Package
- SOIC-28
- Series
- 資料獲取-數模轉換器（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 | AD9744ARUZRL7 | AD9742ARZRL | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Resolution determines the number of discrete output levels; a 14-bit DAC offers 4x finer quantization than a 12-bit DAC, directly affecting signal fidelity and SFDR in reconstruction applications. |
| Update Rate (Max) | 210 MSPS | 210 MSPS | Maximum sample rate defines the highest signal bandwidth the DAC can synthesize; both parts share the same 210 MSPS ceiling, so throughput is not a differentiator. |
| Number of DAC Channels | 1 | 1 | Channel count confirms both are single-channel current-output DACs, so board-level channel architecture is interchangeable. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, meaning external op-amps or transformers are required for voltage conversion; identical output topology simplifies substitution. |
| Supply Voltage (Analog & Digital) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Matching 3.3 V nominal supply ranges means the same power rail design and decoupling can be reused without rework. |
| Package / Case | 28-TSSOP | 28-SOIC | Different package footprints (TSSOP vs SOIC) require different PCB land patterns, so a drop-in replacement is not possible without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature ratings ensure both parts meet the same environmental qualification requirements. |
| Interface | Parallel | Parallel | Both use a parallel input interface, so the same FPGA/ASIC data bus timing and pinout scheme applies to either device. |
| INL (Integral Nonlinearity) | ±1.5 LSB (typ) | ±0.5 LSB (typ) | INL affects absolute accuracy of the transfer function; the 12-bit part specifies tighter LSB-referenced linearity, though absolute error in volts may be comparable. |
| Power Dissipation | 135 mW (typ @ 3.3 V) | 135 mW (typ @ 3.3 V) | Equivalent power consumption means thermal design and supply sizing remain unchanged between the two parts. |
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 | AD9744ARUZRL7 | AD9742ARZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 14 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 11ns (Typ) | 11ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| INL / DNL(LSB) | ±0.8, ±0.5 | ±0.5, ±0.4 |
| Architecture | Current Source | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9744ARUZRL7 and the AD9742ARZRL?
The AD9744ARUZRL7 is a 14-bit, 210 MSPS TxDAC+ digital-to-analog converter, while the AD9742ARZRL is a 12-bit, 210 MSPS TxDAC+ DAC. Both offer the same maximum update rate and similar architecture, but the AD9744 provides 14-bit resolution versus 12-bit on the AD9742, yielding higher dynamic range and lower quantization noise. The AD9744ARUZRL7 is supplied in a 28-lead TSSOP package, whereas the AD9742ARZRL is supplied in a 28-lead SOIC package.
Are the AD9744ARUZRL7 and AD9742ARZRL pin-compatible?
No. The AD9744ARUZRL7 uses a 28-lead TSSOP package and the AD9742ARZRL uses a 28-lead SOIC package, so the package footprints and PCB land patterns differ. A direct drop-in replacement is not possible without a board layout change; pin functions should be verified against the respective datasheets before any substitution.
Do both parts support the same maximum DAC update rate?
Yes. Both the AD9744 and AD9742 are specified for a maximum update rate of 210 MSPS, so the sample clock capability is equivalent between the two devices.
What is the resolution difference and how does it affect performance?
The AD9744ARUZRL7 provides 14-bit resolution, while the AD9742ARZRL provides 12-bit resolution. The higher resolution of the AD9744 reduces quantization error and can improve signal-to-noise ratio and spurious-free dynamic range in the DAC output, which matters in demanding transmit and synthesis applications.
Are the AD9744ARUZRL7 and AD9742ARZRL functionally similar in architecture?
Yes. Both are members of the Analog Devices TxDAC+ family and share a similar current-output DAC architecture with on-chip reference and control functions. They differ primarily in resolution and package, so the surrounding interface and output configuration concepts are comparable, but design values must be recalculated for the selected resolution.
Can the AD9742ARZRL be used as a lower-cost substitute for the AD9744ARUZRL7?
Only if the design can tolerate 12-bit instead of 14-bit resolution and the PCB is redesigned for the SOIC package. Because resolution and package differ, substitution requires validation of dynamic performance, output filtering, and layout against the AD9742 datasheet; it is not a direct drop-in replacement.
What package options distinguish these two ordering codes?
The AD9744ARUZRL7 is offered in a 28-lead TSSOP package, and the AD9742ARZRL is offered in a 28-lead SOIC package. The suffix differences in the ordering codes reflect these package and packing variations, so mechanical and assembly considerations must be checked before interchange.