Part A
AD9744ACPZRL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2452 PCS
- Package
- LFCSP-32
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD9744ACPZRL7 and AD9743BCPZRL are not drop-in replacements for one another. Although both are dual-channel, 14-bit high-speed DACs from Analog Devices in a 32-lead LFCSP package, they differ in their digital input interface, maximum update rate, and supply architecture, so a direct board-level substitution is not possible without design changes and validation.
Different input interface
Different update rate
Different supply architecture
Different power dissipation
Parts at a glance
Part B
AD9743BCPZRL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7690 PCS
- Package
- VFQFN-72
- 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 | AD9744ACPZRL7 | AD9743BCPZRL | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 10 bit | Resolution determines the number of discrete output levels; a 14-bit DAC offers far finer quantization than a 10-bit DAC, so they are not functionally interchangeable in precision applications. |
| Number of DAC Channels | 1 | 2 | Channel count defines how many independent analog outputs are available; a dual-channel part cannot directly replace a single-channel part in a single-path design without redesign. |
| Update Rate (Maximum) | 210 MSPS | 250 MSPS | Maximum sample rate sets the achievable signal bandwidth; the higher-rate device can support wider-band signals but may require different clocking and layout. |
| Output Type | Current (differential) | Current (differential) | Both provide differential current outputs, so the analog interface topology is compatible, though external reconstruction filtering must be matched to the resolution and rate. |
| Supply Voltage | 3.0 V to 3.6 V | 1.8 V to 3.3 V (digital) / 3.3 V (analog) | Supply requirements affect board power design and level compatibility; differing rails mean the power tree and I/O interfacing must be revalidated. |
| Package | 32-lead LFCSP | 40-lead LFCSP | Package footprint and pin count must match for a drop-in replacement; different packages require PCB redesign. |
| Interface | Parallel CMOS | Parallel CMOS | A matching parallel CMOS input simplifies digital connection, but the differing bus width (14 vs 10 bits) changes the FPGA/controller pin allocation. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both suit the same environmental conditions, removing thermal qualification as a differentiator. |
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 | AD9743BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Number of Bits | 14 | 10 |
| Number of D/A Converters | 1 | 2 |
| 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 | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 1.7V ~ 1.9V, 3.13V ~ 3.47V |
| INL / DNL(LSB) | ±0.8, ±0.5 | ±0.1, ±0.05 |
| Architecture | Current Source | Quad-Switch |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Series | TxDAC® | - |
| Settling Time | 11ns (Typ) | - |
Frequently asked questions
What are the key differences between the AD9744ACPZRL7 and the AD9743BCPZRL?
The AD9744ACPZRL7 is a single-channel 14-bit current-output DAC, while the AD9743BCPZRL is a dual-channel 10-bit current-output DAC. Both are members of Analog Devices' TxDAC family and operate from a 3.0 V to 3.6 V supply, but they differ in resolution, channel count, and package pinout.
Are the AD9744ACPZRL7 and AD9743BCPZRL pin-compatible?
No. The AD9744ACPZRL7 is supplied in a 32-lead LFCSP package, and the AD9743BCPZRL is supplied in a 40-lead LFCSP package. The different package sizes and pin counts mean they are not drop-in replacements for one another.
What is the maximum update rate of each device?
The AD9744ACPZRL7 supports a maximum update rate of 210 MSPS. The AD9743BCPZRL supports a maximum update rate of 125 MSPS. Designs requiring higher sample rates should account for this difference.
What resolution and channel count does each DAC provide?
The AD9744ACPZRL7 provides a single 14-bit DAC channel. The AD9743BCPZRL provides two independent 10-bit DAC channels. The choice depends on whether the application prioritizes higher resolution (AD9744) or dual-channel integration (AD9743).
Do both parts use the same supply voltage and output configuration?
Yes. Both devices operate from a single 3.0 V to 3.6 V supply and provide differential current outputs. Both are members of the TxDAC family and share similar current-steering architecture, though their resolution and channel count differ.
Can the AD9743BCPZRL replace the AD9744ACPZRL7 in an existing design?
Not directly. The AD9743BCPZRL has a different package (40-lead LFCSP vs 32-lead LFCSP), lower resolution (10-bit vs 14-bit), lower maximum update rate (125 MSPS vs 210 MSPS), and two channels instead of one. A redesign of the PCB land pattern and validation of system performance would be required.
What are typical applications for each device?
The AD9744ACPZRL7 is typically used in single-channel high-resolution applications such as communications transmit paths, instrumentation, and waveform generation. The AD9743BCPZRL is suited to dual-channel applications such as I/Q transmit paths and multi-channel signal generation where 10-bit resolution is sufficient.