Part A
AD9744ACPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1927 PCS
- Package
- WFQFN-32
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9744ACPZ and AD9742ACPRL7 are both 14-bit high-speed TxDAC digital-to-analog converters from Analog Devices in the same 32-lead LFCSP package, sharing identical resolution, supply architecture, and digital interface. The AD9744ACPZ offers a higher maximum update rate and wider analog output compliance range, making it a viable functional upgrade candidate for AD9742ACPRL7 designs, provided the system timing margin and output network are validated against the higher sample rate and full-scale current settings.
Resolution and DAC Architecture
High match
Package and Pin Configuration
High match
Maximum Update Rate
Validation required
Analog Output Compliance Range
Validation required
Parts at a glance
Part B
AD9742ACPRL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4110 PCS
- Package
- WFQFN-32
- 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 | AD9744ACPZ | AD9742ACPRL7 | 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 sample rate defines the highest clock frequency at which the DAC can operate, directly limiting the achievable output bandwidth. |
| Number of DAC Channels | 1 | 1 | Channel count indicates whether the device is single or multi-channel; both are single-channel, so board-level channel architecture is compatible. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output type determines the external interface circuitry required; both provide unbuffered current outputs, so the same output network topology can be reused. |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | Supply voltage range must match the system power rail; identical ranges mean the same power supply design can be used for either part. |
| Package / Case | 32-WFQFN Exposed Pad, CSP | 32-WFQFN Exposed Pad, CSP | Package and footprint compatibility is essential for drop-in substitution; matching packages allow the same PCB land pattern to be used. |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Operating temperature range must cover the application environment; identical ranges ensure equivalent thermal robustness. |
| Data Interface | Parallel | Parallel | Interface type determines the digital connection to the host; both use a parallel interface, so the same FPGA/controller bus can drive either device. |
| INL / DNL | ±1.5 LSB INL (typ) | ±0.5 LSB INL (typ) | Integral and differential nonlinearity indicate static accuracy; differences here affect distortion and monotonicity performance in precision applications. |
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 | AD9744ACPZ | AD9742ACPRL7 |
|---|---|---|
| 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 AD9744ACPZ and AD9742ACPRL7?
The AD9744ACPZ is a 14-bit, 210 MSPS TxDAC+ digital-to-analog converter in a 32-lead LFCSP package, while the AD9742ACPRL7 is a 12-bit, 210 MSPS TxDAC+ DAC in a 28-lead SSOP package supplied in tape-and-reel format. The primary differences are resolution (14-bit vs 12-bit) and package footprint.
Are the AD9744ACPZ and AD9742ACPRL7 pin-compatible?
No. The AD9744ACPZ uses a 32-lead LFCSP package, whereas the AD9742ACPRL7 uses a 28-lead SSOP package. The differing pin counts and package dimensions mean they are not drop-in replacements and require different PCB land patterns.
Do both parts share the same update rate and interface?
Yes. Both the AD9744 and AD9742 are specified for a maximum update rate of 210 MSPS and use a parallel CMOS-compatible input interface with the same TxDAC+ architecture, allowing similar digital input timing and clocking schemes.
What is the resolution difference and how does it affect performance?
The AD9744ACPZ provides 14-bit resolution, while the AD9742ACPRL7 provides 12-bit resolution. The higher resolution of the AD9744 yields finer output quantization and lower quantization noise, which can improve signal-to-noise ratio in demanding waveform synthesis applications.
Can the AD9742ACPRL7 be used as a substitute for the AD9744ACPZ in an existing design?
Not directly. Substitution requires verifying the reduced 12-bit resolution meets the application's accuracy requirements and redesigning the PCB for the 28-lead SSOP footprint instead of the 32-lead LFCSP. Both parts must be evaluated against the target design specifications before substitution.
What are the package and ordering differences between the two parts?
The AD9744ACPZ is supplied in a 32-lead LFCSP package, while the AD9742ACPRL7 is supplied in a 28-lead SSOP package in tape-and-reel (RL7) format. The suffix differences reflect package type and packing configuration, which affect assembly handling and reflow profiles.
Do both converters operate from the same supply voltage?
Yes. Both the AD9744 and AD9742 are specified to operate from a single 3.0 V to 3.6 V analog supply, with a separate digital supply, consistent with the TxDAC+ family architecture. Designers should confirm exact supply and reference requirements against the respective manufacturer datasheets.