Part A
AD9744ACPZRL7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2452 個数
- Package
- LFCSP-32
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Not a drop-in replacement
The AD9744ACPZRL7 and AD9746BCPZ are not drop-in replacements for one another. Although both are dual-channel high-speed DACs from the same family, they differ in resolution, output architecture, and package footprint, so a direct board-level swap is not possible without redesign and validation.
Different resolution
Different output architecture
Different package footprint
Different supply configuration
Parts at a glance
Part B
AD9746BCPZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4643 個数
- Package
- LFCSP-72
- Series
- データ取得 - デジタル/アナログコンバータ (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 | AD9746BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 14 bit | Bit depth determines the quantization precision and achievable dynamic range of the DAC output. |
| Number of DAC Channels | 1 | 2 | Single vs dual channel determines whether one device can drive two independent signal paths, affecting board architecture and channel count. |
| Maximum Update Rate | 210 MSPS | 250 MSPS | The update rate sets the maximum synthesizable signal bandwidth and oversampling capability for the application. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output architecture dictates the external interface circuitry (transformer or op-amp) required to convert the DAC current to a usable voltage. |
| Supply Voltage | 3.0 V to 3.6 V | 1.8 V, 3.3 V | Supply requirements determine power rail compatibility and whether level shifting or additional regulators are needed on the board. |
| Package / Case | 32-LFCSP (5x5) | 72-LFCSP (10x10) | Package footprint and pin count affect PCB layout, thermal design, and whether the parts are drop-in compatible. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | The temperature range confirms suitability for industrial-grade environments and reliability across operating conditions. |
| Interface | Parallel | Parallel | The digital interface type determines the host controller requirements and the achievable data throughput per pin. |
| Power Dissipation (Typical) | 135 mW | 320 mW | Power dissipation impacts thermal management, supply sizing, and overall system efficiency, especially in dense designs. |
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 | AD9746BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 14 | 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) | ±0.8, ±0.5 | ±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 architectural differences between the AD9744ACPZRL7 and the AD9746BCPZ?
The AD9744ACPZRL7 is a single-channel, 14-bit, 210 MSPS TxDAC digital-to-analog converter, while the AD9746BCPZ is a dual-channel, 14-bit, 250 MSPS TxDAC converter. The AD9746 integrates two DAC cores in one package, whereas the AD9744 provides a single DAC channel.
Do the AD9744ACPZRL7 and AD9746BCPZ use the same package and pinout?
No. The AD9744ACPZRL7 is supplied in a 32-lead LFCSP (CP-32-2) package, and the AD9746BCPZ is supplied in a 72-lead LFCSP (CP-72-2) package. The pin counts and pinouts differ, so the two devices are not footprint-compatible.
What are the maximum update rates of the AD9744ACPZRL7 and AD9746BCPZ?
The AD9744ACPZRL7 supports a maximum update rate of 210 MSPS. The AD9746BCPZ supports a maximum update rate of 250 MSPS per DAC channel.
What is the resolution and DAC type of each device?
Both devices are 14-bit TxDAC current-output digital-to-analog converters. The AD9744ACPZRL7 provides one 14-bit DAC channel, and the AD9746BCPZ provides two 14-bit DAC channels.
What supply voltages do the AD9744ACPZRL7 and AD9746BCPZ require?
Both devices operate from a 3.3 V analog supply and a 1.8 V to 3.3 V digital supply, with separate analog and digital supply pins to support mixed-signal isolation. Designers should confirm exact supply ranges and tolerances against the respective manufacturer datasheets.
Can the AD9744ACPZRL7 be used as a drop-in replacement for the AD9746BCPZ?
No. The AD9744ACPZRL7 is a single-channel device in a 32-lead LFCSP, while the AD9746BCPZ is a dual-channel device in a 72-lead LFCSP. The channel count, package, pinout, and maximum update rate differ, so a direct drop-in replacement is not possible without redesign.
Which device is better suited for dual-channel I/Q transmit applications?
The AD9746BCPZ is better suited for dual-channel I/Q transmit applications because it integrates two matched 14-bit DAC channels in a single package, supporting a maximum update rate of 250 MSPS per channel. The AD9744ACPZRL7 provides only a single channel and would require two devices for I/Q signal generation.