Part A
AD9742ACPZ
ADI公司
- Lifecycle
- Active
- Stock
- 1312 件
- Package
- LFCSP-32
- Series
- 資料獲取-數模轉換器（DAC）
Replacement verdict
Not a drop-in replacement
The AD9742ACPZ and AD9746BCPZRL are not drop-in replacements for one another. Although both are dual-channel high-speed DACs from Analog Devices, they differ in resolution, output architecture, and package footprint, so a direct substitution is not possible without redesign and validation.
Different resolution
Different output architecture
Different package footprint
Different supply configuration
Parts at a glance
Part B
AD9746BCPZRL
ADI公司
- Lifecycle
- Active
- Stock
- 5608 件
- Package
- VFQFN-72
- 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 | AD9742ACPZ | AD9746BCPZRL | Why it matters |
|---|---|---|---|
| Resolution (Bits) | 12 | 14 | Higher resolution provides finer output quantization and lower quantization noise, directly affecting achievable signal-to-noise ratio and spectral purity. |
| Number of DAC Channels | 1 | 2 | A dual-channel DAC supports I/Q or complex signal generation in one package, while a single-channel device requires two parts for the same function. |
| Maximum Update Rate | 210 MSPS | 250 MSPS | The update rate sets the maximum synthesizable signal bandwidth and determines suitability for high-frequency or wideband applications. |
| Output Type | Current (differential) | Current (differential) | Both provide differential current outputs, so the external output network and transformer/amplifier interface topologies are largely compatible. |
| Supply Voltage | 3.0 V to 3.6 V | 1.8 V to 3.3 V (digital), 3.3 V (analog) | Supply requirements determine power-rail compatibility and whether the part can drop into an existing board without regulator changes. |
| Package | 32-Lead LFCSP | 72-Lead LFCSP | Different package footprints and pin counts prevent direct board-level substitution without a layout redesign. |
| Power Consumption (typical) | 135 mW | 300 mW | Power dissipation affects thermal design, supply sizing, and suitability for power-sensitive or densely packed systems. |
| Interface / Input Format | Parallel CMOS | Parallel CMOS (dual port) | Input bus width and port structure affect the digital driver requirements and the FPGA/ASIC pin allocation needed to feed the DAC. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both parts suit the same environmental conditions and reliability requirements. |
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 | AD9742ACPZ | AD9746BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Number of Bits | 12 | 14 |
| 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) | ±0.5, ±0.4 | ±1, ±0.5 |
| 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 AD9742ACPZ and AD9746BCPZRL?
The AD9742ACPZ is a 12-bit, 210 MSPS TxDAC digital-to-analog converter in a 32-lead LFCSP package, while the AD9746BCPZRL is a dual 14-bit, 250 MSPS TxDAC in a 40-lead LFCSP package. The AD9746 offers higher resolution, higher update rate, and two DAC channels, whereas the AD9742 is a single-channel 12-bit DAC.
Are the AD9742ACPZ and AD9746BCPZRL pin-compatible?
No. The AD9742ACPZ uses a 32-lead LFCSP package and the AD9746BCPZRL uses a 40-lead LFCSP package, so they have different pin counts and footprints and are not pin-compatible.
Can the AD9742ACPZ be used as a drop-in replacement for the AD9746BCPZRL?
No. Beyond the different package and pin count, the AD9742 is a single 12-bit DAC while the AD9746 is a dual 14-bit DAC with a higher maximum update rate. A direct substitution is not possible without redesigning the board and validating the system requirements.
What are the maximum update rates of the AD9742ACPZ and AD9746BCPZRL?
The AD9742ACPZ supports a maximum update rate of 210 MSPS, and the AD9746BCPZRL supports a maximum update rate of 250 MSPS.
What resolution does each DAC provide?
The AD9742ACPZ provides 12-bit resolution, while the AD9746BCPZRL provides 14-bit resolution on each of its two DAC channels.
How many DAC channels does each device integrate?
The AD9742ACPZ integrates a single DAC channel, whereas the AD9746BCPZRL integrates two DAC channels in one package.
What are the package and operating temperature specifications for these parts?
Both devices are offered in LFCSP packages: the AD9742ACPZ in a 32-lead LFCSP and the AD9746BCPZRL in a 40-lead LFCSP. Both are specified for the industrial temperature range of −40°C to +85°C.
Which device is better suited for higher-resolution, dual-channel applications?
The AD9746BCPZRL is better suited for higher-resolution, dual-channel applications because it provides 14-bit resolution, two DAC channels, and a 250 MSPS maximum update rate, compared with the single 12-bit channel and 210 MSPS rate of the AD9742ACPZ.