Part A
AD9146BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2038 PCS
- Package
- LFCSP-48
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9144BCPZRL is a higher-performance, pin-compatible upgrade candidate for the AD9146BCPZ, offering the same 16-bit dual-channel DAC architecture, identical 72-lead LFCSP footprint, and the same 1.8 V/3.3 V supply scheme, while doubling the maximum update rate to 2.8 GSPS. Designers should validate the higher power envelope and JESD204B lane configuration before adopting it as a drop-in substitute.
Resolution and Channel Count
High match
Package and Pinout
High match
Maximum Sample Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD9144BCPZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5946 PCS
- Package
- VFQFN-88
- 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 | AD9146BCPZ | AD9144BCPZRL | Why it matters |
|---|---|---|---|
| Resolution (DAC Bits) | 16 bit | 16 bit | Bit depth determines the quantization noise floor and achievable dynamic range of the DAC output. |
| Number of DAC Channels | 2 (Dual) | 4 (Quad) | Channel count determines how many independent signal paths can be generated, affecting multi-antenna or I/Q architectures. |
| Maximum Update Rate | 1230 MSPS | 2800 MSPS | Higher sample rate supports wider instantaneous signal bandwidth and higher intermediate frequencies. |
| JESD204B Lane Rate / Interface | JESD204B, up to 3.125 Gbps | JESD204B, up to 12.5 Gbps | The serial interface speed constrains the maximum data throughput and number of channels that can be supported. |
| Output Current Range | 2 mA to 20 mA | 2 mA to 40 mA | Output current range affects the achievable output power and the ability to drive downstream analog stages. |
| Package / Pin Count | 72-lead LFCSP | 88-lead LFCSP | Package and pin count affect PCB footprint, routing, and whether the parts are drop-in compatible. |
| Supply Voltage | 1.8 V and 3.3 V | 1.8 V and 3.3 V | Supply rails must match the board power design for the device to operate correctly. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for industrial versus commercial environments. |
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 | AD9146BCPZ | AD9144BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 2 | 4 |
| Settling Time | 20ns (Typ) | 20ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | LVDS - Parallel | JESD204B |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | 3.13V ~ 3.47V | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.71V ~ 1.89V | 1.14V ~ 1.26V |
| INL / DNL(LSB) | ±3.7, ±2.1 | ±2, ±1 |
| Architecture | Current Source | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9146BCPZ and the AD9144BCPZRL?
The AD9146BCPZ is a dual 16-bit, 123 MSPS TxDAC+ digital-to-analog converter, while the AD9144BCPZRL is a quad 16-bit, 2.8 GSPS DAC. The AD9144 offers significantly higher sample rate and channel density, making it suited for wideband multi-channel transmit applications, whereas the AD9146 targets lower-speed dual-channel designs.
Are the AD9146BCPZ and AD9144BCPZRL pin-compatible?
No. The AD9146BCPZ is supplied in a 48-lead LFCSP package, and the AD9144BCPZRL is supplied in an 88-lead LFCSP package. The different package sizes and pin counts mean they are not pin-compatible and cannot be dropped into the same PCB land pattern.
What are the resolution and sample rate specifications of each device?
Both devices provide 16-bit DAC resolution. The AD9146BCPZ supports a maximum update rate of 123 MSPS per channel, while the AD9144BCPZRL supports a maximum sample rate of 2.8 GSPS per channel, enabling direct RF synthesis at much higher frequencies.
How do the channel counts of the two DACs compare?
The AD9146BCPZ integrates two 16-bit DAC channels (dual DAC), whereas the AD9144BCPZRL integrates four 16-bit DAC channels (quad DAC). The higher channel count of the AD9144 supports multi-antenna and I/Q transmit architectures in a single device.
Do both parts support a JESD204B serial interface?
Yes. Both the AD9146BCPZ and the AD9144BCPZRL include a JESD204B serial input interface, which reduces pin count and simplifies routing compared with parallel LVDS interfaces. The AD9144 supports higher lane rates consistent with its higher sample rate.
Which device is better suited for wideband RF transmit applications?
The AD9144BCPZRL is better suited for wideband RF transmit applications because its 2.8 GSPS maximum sample rate supports direct RF synthesis at higher intermediate frequencies. The AD9146BCPZ, limited to 123 MSPS, is intended for lower-frequency, lower-bandwidth transmit signal chains.
Can the AD9146BCPZ be used as a drop-in replacement for the AD9144BCPZRL?
No. Beyond the different package and pin count, the two devices differ in channel count, maximum sample rate, and power/clocking requirements. A replacement requires a full design review against the respective datasheets, including PCB layout, clocking, JESD204B link configuration, and power delivery.