Part A
AD9744ARUZ
ADI公司
- Lifecycle
- Active
- Stock
- 6063 件
- Package
- TSSOP-28
- Series
- 資料獲取-數模轉換器（DAC）
Replacement verdict
Compatible functional replacement candidate
The AD9744ARUZ and AD9740ARURL7 are both 10-bit high-speed TxDAC digital-to-analog converters from Analog Devices in the same TSSOP-28 family, sharing core resolution, supply, and interface characteristics. The AD9744ARUZ offers a higher maximum update rate and wider operating temperature range, while the AD9740ARURL7 is a reduced-rate variant; designers should validate dynamic performance and timing margins at the target sample rate before substituting in production designs.
Resolution and DAC Architecture
High match
Package and Pinout
High match
Maximum Update Rate
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD9740ARURL7
ADI公司
- Lifecycle
- Active
- Stock
- 4799 件
- Package
- TSSOP-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 | AD9744ARUZ | AD9740ARURL7 | 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 the target application. |
| 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 clocking requirements are interchangeable. |
| Number of DAC Channels | 1 | 1 | Single-channel architecture means both devices serve the same single-path transmit or waveform-generation role, simplifying substitution at the system level. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, so the same external transformer or op-amp interface network can be reused without redesign. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Identical single 3.3 V nominal supply range allows the same power rail and decoupling scheme to be shared between the two parts. |
| Package / Case | 28-TSSOP | 28-TSSOP | Matching 28-lead TSSOP footprint enables drop-in board replacement without layout changes, though pin functions should still be verified. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Equivalent industrial temperature ratings mean both parts are qualified for the same environmental conditions in the end application. |
| Interface | Parallel | Parallel | Both use a parallel data interface, so the same FPGA or DSP bus width and timing scheme can drive either device. |
| Power Dissipation (Typical) | 135 mW | 135 mW | Similar typical power consumption keeps thermal budgets and supply sizing unchanged when swapping between the two converters. |
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 | AD9744ARUZ | AD9740ARURL7 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Obsolete |
| Number of Bits | 14 | - |
| 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) | ±0.8, ±0.5 | - |
| Architecture | Current Source | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the AD9744ARUZ and AD9740ARURL7?
The AD9744ARUZ is a 14-bit, 210 MSPS TxDAC+ digital-to-analog converter in a 28-lead TSSOP package, while the AD9740ARURL7 is a 10-bit, 210 MSPS TxDAC+ DAC in a 28-lead TSSOP package supplied in tape-and-reel format. The primary differences are resolution (14-bit vs 10-bit) and packaging/packing format (tube vs tape-and-reel).
Do the AD9744ARUZ and AD9740ARURL7 share the same pinout and package?
Yes. Both devices are offered in a 28-lead TSSOP (RU-28) package and are pin-compatible members of the AD974x TxDAC+ family, allowing board designs to accommodate either resolution variant with the same footprint.
What is the maximum update rate of these DACs?
Both the AD9744ARUZ and AD9740ARURL7 are specified for a maximum update rate of 210 MSPS, making them suitable for high-speed communications, instrumentation, and signal synthesis applications.
What is the resolution difference and how does it affect performance?
The AD9744ARUZ provides 14-bit resolution, while the AD9740ARURL7 provides 10-bit resolution. The higher resolution of the AD9744ARUZ yields finer quantization and lower quantization noise, which generally improves signal-to-noise ratio and spurious-free dynamic range in demanding applications.
What supply voltage and output configuration do these DACs use?
Both devices operate from a single 3.0 V to 3.6 V supply and provide differential current outputs, typically 2 mA to 20 mA full-scale, designed for direct interfacing with differential transformers or op-amp circuits.
What does the "ARURL7" suffix indicate on the AD9740ARURL7?
The "ARURL7" suffix indicates the 28-lead TSSOP package (RU) supplied in tape-and-reel packaging (RL7), which is intended for automated high-volume assembly. The AD9744ARUZ is supplied in the same TSSOP package but in tube form.
Can the AD9740ARURL7 be used as a drop-in replacement for the AD9744ARUZ?
Because both are pin-compatible 28-lead TSSOP devices in the same family, the AD9740ARURL7 can physically populate the same footprint, but it provides only 10-bit resolution versus 14-bit. A design requiring 14-bit performance cannot substitute the 10-bit device without accepting reduced resolution and verifying system performance against the application requirements.