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 AD9742ARURL7 are both 14-bit high-speed TxDAC digital-to-analog converters from Analog Devices sharing the same resolution, current-output architecture, and 28-lead TSSOP footprint, making the AD9742ARURL7 a viable functional substitute for the AD9744ARUZ in many designs. However, the two parts differ in maximum update rate and dynamic performance, so the replacement should be validated against the target application's sampling frequency, spectral requirements, and power budget before adoption.
Resolution
High match
Output Type
High match
Maximum Update Rate
Validation required
Package Type
Validation required
Parts at a glance
Part B
AD9742ARURL7
ADI公司
- Lifecycle
- Active
- Stock
- 4486 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 | AD9742ARURL7 | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Resolution determines the number of discrete output levels; a 14-bit DAC provides 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 architecture and pin function remain compatible for direct substitution. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, meaning the same external op-amp or transformer interface can be reused without redesign. |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | Identical analog and digital supply ranges allow the same power rail design and decoupling scheme to be used for either device. |
| Package / Case | 28-TSSOP | 28-TSSOP | Matching package and pinout enables drop-in replacement on an existing PCB without layout changes. |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | Equivalent industrial temperature ratings ensure both parts meet the same environmental qualification requirements. |
| Interface | Parallel | Parallel | Both use a parallel CMOS input interface, so the same FPGA or DSP data bus can drive either converter. |
| 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 linearity, though the 14-bit part's LSB is smaller in absolute terms. |
| Power Dissipation | 135 mW typ | 135 mW typ | Similar power consumption means thermal design and supply sizing remain unchanged when swapping between the two devices. |
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 | AD9742ARURL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Obsolete |
| 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 AD9744ARUZ and AD9742ARURL7?
The AD9744ARUZ is a 14-bit, 210 MSPS TxDAC digital-to-analog converter in a 28-lead TSSOP package, while the AD9742ARURL7 is a 12-bit, 210 MSPS TxDAC in a 28-lead TSSOP package supplied in tape-and-reel format. The primary differences are resolution (14-bit vs 12-bit) and packaging/packing format (tube vs tape-and-reel).
Do the AD9744ARUZ and AD9742ARURL7 share the same pinout and package?
Yes. Both devices are offered in a 28-lead TSSOP (RU-28) package and are pin-compatible per Analog Devices documentation, which allows board designs to accommodate either resolution variant without layout changes.
What is the maximum update rate and resolution of each device?
Both the AD9744ARUZ and AD9742ARURL7 support a maximum update rate of 210 MSPS. The AD9744ARUZ provides 14-bit resolution, while the AD9742ARURL7 provides 12-bit resolution.
What are the typical power supply and output characteristics of these DACs?
Both devices operate from a single 3.0 V to 3.6 V supply and provide a differential current output typically in the 2 mA to 20 mA range. They are members of the TxDAC family and are specified for operation over the industrial temperature range of −40 °C to +85 °C.
Can the AD9742ARURL7 be used as a drop-in replacement for the AD9744ARUZ?
Because both parts are pin-compatible 28-lead TSSOP devices with the same 210 MSPS update rate and supply requirements, the AD9742ARURL7 can physically fit the same footprint. However, it provides 12-bit rather than 14-bit resolution, so the substitution is only acceptable if the system's dynamic range and accuracy requirements are met by 12 bits. Validation against the datasheet and target design is required.
What is the difference in packing format between the two part numbers?
The AD9744ARUZ is supplied in tube packaging, whereas the AD9742ARURL7 suffix "RL7" indicates tape-and-reel packaging with 7-inch reels, which is suited to automated surface-mount assembly lines.
Are both devices specified for the same operating temperature range?
Yes. Both the AD9744ARUZ and AD9742ARURL7 are specified over the industrial temperature range of −40 °C to +85 °C, as stated in their respective Analog Devices datasheets.