Part A
AD9744ACPZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2452 PCS
- Package
- LFCSP-32
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9744ACPZRL7 and AD9742ACPZRL7 share the same 14-bit DAC architecture, LFCSP-32 package, and pinout, making them strong functional replacement candidates. However, the AD9744 offers a higher maximum update rate and wider input bandwidth than the AD9742, so designers must validate timing margins and signal integrity against the system's sampling requirements before substituting.
Resolution
High match
Package Type
High match
Maximum Update Rate
Validation required
Input Bandwidth
Validation required
Parts at a glance
Part B
AD9742ACPZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5560 PCS
- Package
- WFQFN-32
- Series
- Acquisição de dados - Convertedores digitais para analógicos (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 | AD9744ACPZRL7 | AD9742ACPZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Higher resolution provides finer output quantization and lower quantization noise, which directly affects signal fidelity in DAC applications. |
| Update Rate (Max) | 210 MSPS | 210 MSPS | Maximum sample rate determines the highest signal bandwidth the DAC can synthesize; both parts share the same rate here. |
| Number of D/A Converters | 1 | 1 | Single-channel architecture defines the channel count available for the application. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Current-output DACs require an external op-amp or transformer to convert to voltage, affecting the analog front-end design. |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | Operating supply range must match the system rail to ensure proper operation and interface compatibility. |
| Package / Case | 32-LFCSP (5x5) | 32-LFCSP (5x5) | Package footprint and thermal characteristics determine PCB layout and board-level compatibility. |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Industrial temperature range ensures reliable operation across harsh environments. |
| Data Interface | Parallel | Parallel | Parallel interface affects pin count, timing, and FPGA/controller connection requirements. |
| INL / DNL | ±1.5 LSB INL (typ) | ±0.5 LSB INL (typ) | Integral and differential nonlinearity impact static accuracy and monotonicity of the DAC transfer function. |
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 | AD9744ACPZRL7 | AD9742ACPZRL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Active |
| 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 AD9744ACPZRL7 and AD9742ACPZRL7?
The AD9744ACPZRL7 is a 14-bit, 210 MSPS TxDAC digital-to-analog converter, while the AD9742ACPZRL7 is a 12-bit, 210 MSPS TxDAC. Both are members of the same pin-compatible TxDAC family from Analog Devices, offered in a 32-lead LFCSP (ACPZ) package and supplied in tape-and-reel (RL7) format. The primary difference is resolution: 14-bit versus 12-bit.
Are the AD9744ACPZRL7 and AD9742ACPZRL7 pin-compatible?
Yes. Both devices are part of the Analog Devices TxDAC family and are specified in the same 32-lead LFCSP (5 mm × 5 mm) package with the same pinout, allowing them to share a common PCB footprint. Designers should still confirm the pinout against the respective datasheets before layout.
Do both converters support the same maximum update rate?
Yes. Both the AD9744 and AD9742 are specified for a maximum update rate of 210 MSPS, making them suitable for comparable high-speed signal synthesis applications. The difference lies in resolution and the resulting dynamic performance rather than sample rate.
What is the resolution difference and how does it affect performance?
The AD9744ACPZRL7 provides 14-bit resolution, while the AD9742ACPZRL7 provides 12-bit resolution. The higher resolution of the AD9744 yields finer amplitude quantization, which generally translates to lower quantization noise and improved spurious-free dynamic range (SFDR) and signal-to-noise ratio (SNR) compared with the 12-bit AD9742.
Are both parts supplied in the same package and packing format?
Yes. Both the AD9744ACPZRL7 and AD9742ACPZRL7 use the ACPZ suffix, denoting a 32-lead LFCSP package, and the RL7 suffix, denoting tape-and-reel packaging. This common package and packing format simplifies inventory and assembly handling when both parts are used.
Can the AD9742ACPZRL7 be used as a drop-in replacement for the AD9744ACPZRL7?
Because the two devices are pin-compatible and share the same package and supply voltage range, the AD9742 can physically populate the same footprint. However, substituting a 12-bit device for a 14-bit device reduces resolution and dynamic performance, so the substitution must be validated against the target design's accuracy and spectral requirements before use.
Do both devices operate from the same supply voltage?
Yes. Both the AD9744 and AD9742 operate from a single 3.0 V to 3.6 V supply, with a nominal 3.3 V rail, and both include an on-chip 1.2 V reference. This common supply requirement allows either device to be used in the same power architecture.
Which part should be selected for higher-accuracy signal generation?
For applications requiring finer amplitude resolution and better dynamic performance, the AD9744ACPZRL7 (14-bit) is the appropriate choice. The AD9742ACPZRL7 (12-bit) is suitable where 12-bit resolution meets the design's accuracy and spectral targets, potentially offering a lower-cost option within the same footprint.