Part A
AD9742ACPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1312 PCS
- Package
- LFCSP-32
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Replacement verdict
Not a drop-in replacement
The AD9742ACPZ and AD9741BCPZ are not drop-in replacements for one another. Although both are dual-channel 12-bit TxDAC converters from Analog Devices, they differ in resolution, sample rate, package footprint, and pin configuration, so a direct board-level substitution is not possible without redesign.
Different resolution
Different sample rate
Different package footprint
Different pin configuration
Parts at a glance
Part B
AD9741BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8711 PCS
- Package
- VFQFN-72
- 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 | AD9742ACPZ | AD9741BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 14 bit | Higher resolution reduces quantization noise and improves dynamic range, which directly affects signal fidelity in the DAC output. |
| Number of DAC Channels | 1 | 2 | A dual-channel DAC can drive two independent signal paths, while a single-channel device requires external duplication for I/Q or multi-tone applications. |
| Maximum Update Rate | 210 MSPS | 250 MSPS | The update rate sets the maximum synthesizable signal bandwidth and determines suitability for high-frequency waveform generation. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Matching output architecture ensures the same external output network and termination scheme can be reused. |
| Supply Voltage | 2.7 V to 3.6 V | 1.8 V, 3.3 V | Supply requirements determine power-rail compatibility and whether the device can drop into an existing board without regulator changes. |
| Package / Case | 32-WFQFN Exposed Pad, CSP | 72-VFQFN Exposed Pad, CSP | Different package footprints and pin counts prevent direct board-level substitution without a layout redesign. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Identical temperature ratings confirm both parts suit the same industrial-grade environmental conditions. |
| Data Interface | Parallel | Parallel | A matching parallel interface allows the same digital controller and timing scheme to drive either device. |
| Mounting Type | Surface Mount | Surface Mount | Consistent mounting style supports the same assembly process, though footprint differences still require layout changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9742ACPZ | AD9741BCPZ |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 8 |
| 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 | ±0.05, ±0.03 |
| 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 AD9741BCPZ?
The AD9742ACPZ is a 12-bit, 210 MSPS TxDAC digital-to-analog converter, while the AD9741BCPZ is a 14-bit, 250 MSPS TxDAC. The AD9741 offers higher resolution and a faster maximum update rate, whereas the AD9742 provides 12-bit resolution at up to 210 MSPS. Both are members of Analog Devices' TxDAC family and are housed in 32-lead LFCSP packages.
Are the AD9742ACPZ and AD9741BCPZ pin-compatible?
Both devices are offered in a 32-lead LFCSP (CP-32) package with the same pin count and footprint. However, designers must verify the pin function assignments against the respective datasheets, as the internal signal routing and configuration pins may differ between the 12-bit AD9742 and 14-bit AD9741. Pin compatibility should be confirmed from the official Analog Devices datasheets before layout.
What is the resolution and maximum update rate of each device?
The AD9742ACPZ provides 12-bit resolution with a maximum update rate of 210 MSPS. The AD9741BCPZ provides 14-bit resolution with a maximum update rate of 250 MSPS. These parameters are specified in the respective Analog Devices datasheets.
Do both parts support the same digital input interface?
Both the AD9742 and AD9741 are TxDAC converters that accept parallel digital input data and include on-chip features such as a 1.2 V reference and a flexible interface. Designers should consult each datasheet for the exact input data format, timing, and latch requirements, since the 12-bit and 14-bit data paths differ in width and must be matched to the driving logic.
What are the typical applications for the AD9742ACPZ and AD9741BCPZ?
Both devices are general-purpose TxDAC converters suited to communications, instrumentation, and signal-generation applications where high-speed digital-to-analog conversion is required. The AD9741BCPZ, with 14-bit resolution and 250 MSPS, is preferable where higher dynamic range and faster update rates are needed, while the AD9742ACPZ suits 12-bit, 210 MSPS designs.
Can the AD9742ACPZ be replaced by the AD9741BCPZ in an existing design?
A direct substitution is not automatic. Although both are 32-lead LFCSP TxDAC devices, the AD9741BCPZ offers 14-bit resolution versus 12-bit for the AD9742ACPZ and a higher 250 MSPS update rate versus 210 MSPS. The digital input width, timing, and configuration must be revalidated against the AD9741 datasheet, and the PCB layout and pin functions should be confirmed before replacement.
What package do the AD9742ACPZ and AD9741BCPZ use?
Both the AD9742ACPZ and AD9741BCPZ are supplied in a 32-lead LFCSP (lead-frame chip-scale package), designated CP-32 by Analog Devices. The "ACPZ" and "BCPZ" suffixes indicate the LFCSP package option. Designers should confirm the exact package outline and thermal pad requirements from the official datasheets.