Part A
AD9744ARUZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3270 Stückzahl
- Package
- TSSOP-28
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9744ARUZRL7 and AD9740ARZRL are both 10-bit high-speed TxDAC converters from Analog Devices with matching resolution, update rate class, supply architecture, and 28-lead TSSOP packaging, making them strong functional replacement candidates. Designers should validate the interface timing, reference configuration, and full-scale current settings against the target application before substituting one for the other.
Resolution
High match
Package Type
High match
Supply Voltage
High match
Maximum Update Rate
Validation required
Parts at a glance
Part B
AD9740ARZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2321 Stückzahl
- Package
- SOIC-28
- Series
- Data Acquisition von 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 | AD9744ARUZRL7 | AD9740ARZRL | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 10 bit | Resolution determines the number of discrete output levels; a 14-bit DAC provides 16x finer quantization than a 10-bit DAC, directly affecting signal fidelity and SFDR in reconstruction applications. |
| Number of D/A Converters | 1 | 1 | Both are single-channel DACs, so channel count is not a differentiator for substitutability. |
| Update Rate (Max) | 210 MSPS | 210 MSPS | Maximum sample rate defines the bandwidth of signals that can be synthesized; identical rates mean both suit the same high-speed transmit signal chains. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Current-output DACs require an external I/V stage; matching output topology 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 | Compatible supply rails allow drop-in replacement without redesigning the power tree. |
| Package / Case | 28-TSSOP (0.173", 4.40mm Width) | 28-SOIC (0.295", 7.50mm Width) | Different package footprints (TSSOP vs SOIC) require different PCB land patterns, so a board respin is needed when substituting. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Identical industrial temperature ratings mean both are suitable for the same environmental conditions. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, consistent with modern SMT assembly processes. |
| INL / DNL Linearity | ±1.5 LSB INL (typ), ±0.5 LSB DNL (typ) | ±0.5 LSB INL (typ), ±0.25 LSB DNL (typ) | Linearity errors affect distortion and accuracy; the 10-bit device specifies tighter LSB-referenced linearity, though absolute accuracy differs due to resolution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9744ARUZRL7 | AD9740ARZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 14 | 10 |
| 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 | ±0.15, ±0.12 |
| 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 AD9740ARZRL?
The AD9744ARUZRL7 is a 14-bit, 210 MSPS TxDAC+ digital-to-analog converter, while the AD9740ARZRL is a 10-bit, 210 MSPS TxDAC+ DAC. Both are members of the same Analog Devices TxDAC+ family and share a 210 MSPS update rate, but they differ in resolution (14-bit vs. 10-bit) and package (TSSOP-28 for the AD9744ARUZRL7 vs. LFCSP-32 for the AD9740ARZRL).
Are the AD9744ARUZRL7 and AD9740ARZRL pin-compatible?
No. The AD9744ARUZRL7 is supplied in a 28-lead TSSOP package, whereas the AD9740ARZRL is supplied in a 32-lead LFCSP package. The different package types and pin counts mean they are not drop-in pin-compatible replacements and require different PCB land patterns.
Do both parts support the same maximum update rate?
Yes. Both the AD9744ARUZRL7 and the AD9740ARZRL are specified for a maximum update rate of 210 MSPS, allowing them to be used in comparable high-speed signal synthesis applications where sample rate is the primary constraint.
What is the resolution difference and how does it affect performance?
The AD9744ARUZRL7 provides 14-bit resolution, offering finer quantization and lower quantization noise than the 10-bit AD9740ARZRL. The higher resolution of the AD9744ARUZRL7 generally yields better signal-to-noise ratio and spurious-free dynamic range performance, which matters in demanding communications and instrumentation designs.
Are both devices members of the same Analog Devices TxDAC+ family?
Yes. Both the AD9744ARUZRL7 and the AD9740ARZRL are part of the Analog Devices TxDAC+ portfolio of high-speed CMOS digital-to-analog converters, sharing the same architectural lineage and similar digital interface and control features.
Can the AD9740ARZRL be used as a substitute for the AD9744ARUZRL7 in an existing design?
Not directly. Although both are 210 MSPS TxDAC+ devices, the AD9740ARZRL offers only 10-bit resolution versus 14-bit on the AD9744ARUZRL7, and it uses a different package (32-lead LFCSP vs. 28-lead TSSOP). Substitution requires validating resolution, dynamic performance, pinout, and PCB layout against the manufacturer datasheets.
What package options are available for each device?
The AD9744ARUZRL7 is offered in a 28-lead TSSOP package, while the AD9740ARZRL is offered in a 32-lead LFCSP package. Designers should confirm the exact package suffix against the Analog Devices datasheet before finalizing footprint and assembly documentation.