Part A
AD9744ARU
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5441 PCS
- Package
- TSSOP-28
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9744ARU and AD9740ARZRL are both 10-bit high-speed TxDAC digital-to-analog converters from Analog Devices with matching resolution, update rate class, and supply architecture, making them a viable functional replacement candidate. However, they differ in package type and pinout, so PCB layout validation is required before substitution.
Resolution
High match
Update Rate
High match
Package Type
Validation required
Pin Configuration
Validation required
Parts at a glance
Part B
AD9740ARZRL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2321 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Digital to Analog Converters (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 | AD9744ARU | AD9740ARZRL | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 10 bit | Resolution determines the number of discrete output levels; a 14-bit DAC offers far finer quantization than a 10-bit DAC, directly affecting signal fidelity and SFDR. |
| Number of D/A Converters | 1 | 1 | Both are single-channel DACs, so channel count is compatible for single-path transmit architectures. |
| Update Rate (Max) | 210 MSPS | 210 MSPS | Maximum sample rate defines the achievable output bandwidth; identical rates mean both can support the same signal bandwidths. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Current-output DACs require an external I/V stage; matching output type ensures the same analog front-end can be reused. |
| Supply Voltage (Analog/Digital) | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Supply range compatibility ensures the same power rails can be used without redesigning the power tree. |
| Package / Case | 28-TSSOP | 28-LFCSP (5x5) | Different package footprints require PCB layout changes; TSSOP vs LFCSP affects thermal performance and board space. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings mean both are suitable for the same industrial-grade environments. |
| Data Interface | Parallel | Parallel | Both use a parallel input interface, so the same digital source and timing scheme can drive either device. |
| INL / DNL (Typical) | ±1.5 LSB INL / ±0.5 LSB DNL | ±0.5 LSB INL / ±0.25 LSB DNL | Linearity specs affect distortion and accuracy; the 10-bit part has tighter LSB-referenced linearity, though absolute accuracy differs with resolution. |
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 | AD9744ARU | AD9740ARZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Obsolete | Active |
| Number of Bits | - | 10 |
| Number of D/A Converters | - | 1 |
| Settling Time | - | 11ns (Typ) |
| Output Type | - | Current - Unbuffered |
| Differential Output | - | Yes |
| Data Interface | - | Parallel |
| Reference Type | - | External, Internal |
| Voltage - Supply, Analog | - | 2.7V ~ 3.6V |
| Voltage - Supply, Digital | - | 2.7V ~ 3.6V |
| INL / DNL(LSB) | - | ±0.15, ±0.12 |
| Architecture | - | Current Source |
| Operating Temperature | - | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9744ARU and AD9740ARZRL?
The AD9744ARU is a 14-bit, 210 MSPS TxDAC+ digital-to-analog converter in a 28-lead TSSOP package, while the AD9740ARZRL is a 10-bit, 210 MSPS TxDAC+ DAC in a 28-lead SOIC package. Both share the same 210 MSPS update rate and current-output architecture, but differ in resolution (14-bit vs 10-bit) and package type (TSSOP vs SOIC).
Are the AD9744ARU and AD9740ARZRL pin-compatible?
No. The AD9744ARU uses a 28-lead TSSOP (RU suffix) package, while the AD9740ARZRL uses a 28-lead SOIC (R suffix) package. The package footprints and land patterns differ, so they are not drop-in replacements on the same PCB without layout changes.
Do both parts support the same maximum update rate?
Yes. Both the AD9744 and AD9740 are specified for a maximum update rate of 210 MSPS, allowing them to be used in similar high-speed signal synthesis applications.
What is the resolution difference and how does it affect performance?
The AD9744ARU provides 14-bit resolution, while the AD9740ARZRL provides 10-bit resolution. Higher resolution in the AD9744 yields finer output quantization and lower quantization noise, which can improve signal-to-noise ratio in demanding applications, whereas the 10-bit AD9740 offers reduced digital interface width and lower cost for less demanding designs.
Are the digital input interfaces of the two devices identical?
Both devices use a parallel digital input interface with the same supply and logic family requirements, but the data bus width differs: the AD9744 accepts 14-bit input words, while the AD9740 accepts 10-bit input words. The pin count is the same (28 leads), but the bit assignments and unused data pins differ.
Can the AD9740ARZRL be used as a lower-cost substitute for the AD9744ARU?
Only if the system can tolerate reduced 10-bit resolution and the PCB is redesigned for the SOIC package. Because resolution and package differ, a direct substitution is not possible without validating the design's dynamic performance requirements and updating the layout.
Do both parts operate from the same supply voltage?
Yes. Both the AD9744 and AD9740 are specified to operate from a single 3.0 V to 3.6 V analog and digital supply, with a nominal 3.3 V supply, consistent with the TxDAC+ family architecture.