Part A
AD9744ACPZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2452 Stückzahl
- Package
- LFCSP-32
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9744ACPZRL7 and AD9741BCPZ are both 14-bit high-speed current-output DACs from Analog Devices, but they differ in resolution-critical architecture, sample rate, and package. The AD9744 offers a higher update rate and a smaller LFCSP package, while the AD9741 provides dual-channel capability in a larger LFCSP. Neither is a direct drop-in replacement; the AD9741BCPZ is a functional candidate only where dual-channel operation and the lower sample rate are acceptable, and the board layout must be redesigned for the different footprint and pinout.
Resolution and DAC Architecture
Validation required
Sample Rate
Not compatible
Channel Count
Not compatible
Package and Pinout
Not compatible
Parts at a glance
Part B
AD9741BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8711 Stückzahl
- Package
- VFQFN-72
- Series
- Data Acquisition von 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 | AD9741BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Resolution determines the number of discrete output levels; a 14-bit DAC offers finer amplitude granularity than a 12-bit DAC, affecting signal fidelity and dynamic range. |
| Number of DAC Channels | 1 | 2 | Channel count determines whether a single or dual signal path can be driven; a dual-channel part can replace two single-channel parts in I/Q or multi-tone applications. |
| Maximum Update Rate | 210 MSPS | 250 MSPS | The update rate sets the maximum sample clock and usable output bandwidth; a higher rate supports wider signal bandwidths and higher intermediate frequencies. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output architecture determines the external interface circuitry required; both are current-output DACs, so similar output conditioning (transformer or op-amp I/V) is needed. |
| Supply Voltage | 3.0 V to 3.6 V | 1.8 V, 3.3 V | Supply voltage compatibility affects whether the part can drop into an existing rail scheme; differing rails may require level shifting or regulator changes. |
| Package / Case | 32-LFCSP (5x5) | 40-LFCSP (6x6) | Package footprint and pin count must match the PCB layout; different packages require a board redesign and cannot be directly substituted. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | The temperature range confirms suitability for industrial environments; matching ranges mean both parts meet the same thermal requirements. |
| Data Interface | Parallel CMOS | Parallel CMOS | The digital input interface must match the driving logic; both use parallel CMOS, so the same FPGA or DSP output bus can drive either device. |
| Mounting Type | Surface Mount | Surface Mount | Mounting style must match the assembly process; both are surface-mount, so they are compatible with the same reflow assembly flow. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9744ACPZRL7 | AD9741BCPZ |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 14 | 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) | ±0.8, ±0.5 | ±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 AD9744ACPZRL7 and the AD9741BCPZ?
The AD9744ACPZRL7 is a 14-bit, 210 MSPS TxDAC digital-to-analog converter in a 32-lead LFCSP package, while the AD9741BCPZ is a 12-bit, 250 MSPS dual-channel DAC in a 48-lead LFCSP package. The AD9744 is a single-channel device with higher resolution, whereas the AD9741 offers dual channels and a higher update rate at reduced resolution.
Do the AD9744ACPZRL7 and AD9741BCPZ have the same pinout and package footprint?
No. The AD9744ACPZRL7 uses a 32-lead LFCSP (CP-32) package, and the AD9741BCPZ uses a 48-lead LFCSP (CP-48) package. The pin counts, pin functions, and PCB land patterns differ, so they are not footprint-compatible and cannot be interchanged without a board redesign.
What are the resolution and sample rate specifications for each device?
The AD9744ACPZRL7 provides 14-bit resolution with a maximum update rate of 210 MSPS. The AD9741BCPZ provides 12-bit resolution with a maximum update rate of 250 MSPS. The AD9741 has two DAC channels, while the AD9744 has one.
Can the AD9744ACPZRL7 be used as a drop-in replacement for the AD9741BCPZ?
No. Beyond the different package and pinout, the AD9744 is a single-channel 14-bit DAC and the AD9741 is a dual-channel 12-bit DAC. Channel count, resolution, package, and pin functions differ, so a direct drop-in substitution is not possible without design changes and validation against the respective datasheets.
What digital input interface do these DACs use?
Both the AD9744ACPZRL7 and AD9741BCPZ use a parallel CMOS-compatible digital input interface for their DAC data words. The AD9744 accepts a 14-bit parallel word, and the AD9741 accepts 12-bit parallel data for each of its two channels. Designers should confirm timing and logic-level requirements in the respective manufacturer datasheets.
What are the typical power supply requirements for the AD9744ACPZRL7 and AD9741BCPZ?
Both devices operate from a nominal 3.3 V analog and digital supply, with separate analog and digital supply pins to support mixed-signal layout practices. Exact supply ranges, current consumption, and power dissipation should be verified in the official Analog Devices datasheets for each part before finalizing a design.
Which device is better suited for dual-channel I/Q transmit applications?
The AD9741BCPZ is the more suitable choice for dual-channel I/Q transmit paths because it integrates two 12-bit DACs in a single package, simplifying channel matching and board space. The AD9744ACPZRL7 is a single-channel 14-bit DAC, so a dual-channel application would require two devices plus additional board area and matching considerations.