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 AD9742ARURL7 are both 14-bit high-speed TxDAC digital-to-analog converters from Analog Devices in the same TSSOP-28 package family, sharing identical resolution, supply architecture, and digital interface characteristics. The AD9744ARUZRL7 offers a higher maximum update rate and wider analog output compliance range, while the AD9742ARURL7 provides a lower-power option with reduced dynamic performance headroom. The AD9744ARUZRL7 can serve as a functional replacement for the AD9742ARURL7 in most applications, provided the system timing margin and power budget are validated against the higher-speed device's requirements.
Resolution and DAC Architecture
High match
Package and Pinout
High match
Maximum Update Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD9742ARURL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4486 Stückzahl
- Package
- TSSOP-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 | AD9742ARURL7 | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Resolution determines the number of discrete output levels; a 14-bit DAC provides finer amplitude granularity than a 12-bit DAC, affecting signal fidelity and quantization noise. |
| Update Rate (Max) | 210 MSPS | 210 MSPS | Maximum update rate defines the highest sample clock the DAC can accept; both parts share the same rate, so bandwidth capability is equivalent. |
| Number of DAC Channels | 1 | 1 | Channel count confirms both are single-channel DACs, so board-level channel architecture is compatible. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output topology determines the external interface circuitry required; matching current-steering unbuffered outputs allows reuse of the same analog front-end design. |
| Supply Voltage (Analog & Digital) | 2.7 V to 3.6 V | 2.7 V to 3.6 V | Supply range compatibility ensures the same power rails can be used without redesigning the power supply. |
| Package / Case | 28-TSSOP | 28-TSSOP | Identical package and pinout allow drop-in replacement on an existing PCB footprint. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Matching industrial temperature ranges confirm both parts are suitable for the same environmental conditions. |
| Data Interface | Parallel | Parallel | Interface type must match for the digital controller to drive the DAC without glue logic changes; both use a parallel CMOS interface. |
| INL (Integral Nonlinearity) | ±1.5 LSB (typ) | ±0.5 LSB (typ) | INL describes static accuracy; a lower INL indicates better linearity, which affects distortion performance in signal synthesis applications. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9744ARUZRL7 | 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 AD9744ARUZRL7 and the AD9742ARURL7?
The AD9744ARUZRL7 is a 14-bit, 210 MSPS TxDAC+ digital-to-analog converter, while the AD9742ARURL7 is a 12-bit, 210 MSPS TxDAC+ DAC. Both are pin-compatible members of the same Analog Devices TxDAC+ family and share the same 28-lead TSSOP package, but the AD9744 offers 14-bit resolution versus 12-bit resolution on the AD9742.
Are the AD9744ARUZRL7 and AD9742ARURL7 pin-compatible?
Yes. Both devices are offered in the same 28-lead TSSOP (RU-28) package and are designed as pin-compatible members of the Analog Devices TxDAC+ family, allowing a common PCB footprint across different resolution grades.
Do the AD9744ARUZRL7 and AD9742ARURL7 have the same maximum update rate?
Yes. Both the AD9744 and AD9742 are specified for a maximum update rate of 210 MSPS, so sample-rate capability is identical between the two parts.
What is the resolution difference and how does it affect performance?
The AD9744ARUZRL7 provides 14-bit resolution, whereas the AD9742ARURL7 provides 12-bit resolution. The higher resolution of the AD9744 yields finer amplitude quantization and lower quantization noise, which typically translates to better spurious-free dynamic range (SFDR) and signal-to-noise ratio (SNR) in demanding signal-synthesis applications.
Do both parts use the same digital input interface and supply requirements?
Yes. Both devices are members of the same TxDAC+ family and use a parallel CMOS-compatible digital input interface with a nominal 3.0 V to 3.6 V digital supply and a 3.0 V to 3.6 V analog supply, along with an on-chip 1.2 V reference, consistent with the AD9744/AD9742 datasheets.
Can the AD9742ARURL7 be used as a drop-in replacement for the AD9744ARUZRL7?
Because the two parts are pin-compatible and share the same package and update rate, the AD9742 can physically populate the same footprint. However, it provides only 12-bit resolution versus 14-bit on the AD9744, so it should only be substituted after confirming that the reduced resolution and associated dynamic-performance differences meet the system requirements.
What are the typical applications for these TxDAC+ converters?
Both the AD9744ARUZRL7 and AD9742ARURL7 are intended for high-speed signal synthesis applications such as communications transmit paths, base stations, instrumentation, and direct digital synthesis, where their 210 MSPS update rate and TxDAC+ architecture support wideband waveform generation.