Part A
AD9146BCPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2038 PCS
- Package
- LFCSP-48
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9146BCPZ and AD9142BCPZRL are both dual-channel 16-bit high-speed DACs from the same Analog Devices family, sharing the LFCSP-72 package and 1.8 V/3.3 V supply architecture, so the AD9146BCPZ is a viable functional replacement candidate for the AD9142BCPZRL in many designs. However, the two parts differ in maximum update rate and interface configuration, so the system clock plan and digital interface timing must be validated against the target application before substitution.
Resolution and Channel Count
High match
Package Type
High match
Maximum Update Rate
Validation required
Digital Interface
Validation required
Parts at a glance
Part B
AD9142BCPZRL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7496 PCS
- Package
- VFQFN-72
- Series
- Data Acquisition - 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 | AD9146BCPZ | AD9142BCPZRL | Why it matters |
|---|---|---|---|
| Resolution (DAC bits) | 16 bit | 16 bit | Bit depth determines the quantization noise floor and achievable dynamic range of the synthesized signal. |
| Maximum Update Rate | 1230 MSPS | 1600 MSPS | Higher update rate enables wider instantaneous bandwidth and higher intermediate frequency synthesis. |
| Number of DAC Channels | 2 | 2 | Dual channels support I/Q complex signal generation for quadrature upconversion architectures. |
| Digital Interface | JESD204A (1 lane per DAC) | JESD204B (up to 2 lanes per DAC) | The serial interface standard affects lane count, deterministic latency capability, and FPGA/ASIC compatibility. |
| Maximum JESD204 Lane Rate | 3.125 Gbps | 6.25 Gbps | Lane rate limits the maximum sample rate and bandwidth that can be transported over the serial link. |
| On-chip Interpolation | 2x, 4x, 8x | 2x, 4x, 8x | Interpolation relaxes input data rate requirements and moves images away from the band of interest. |
| Digital Up Converter (DUC) | Yes (with NCO) | Yes (with NCO) | An integrated DUC with NCO allows frequency shifting in the digital domain, simplifying RF upconversion. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Supply rails must match the board power design for direct drop-in compatibility. |
| Package | 72-lead LFCSP (10 x 10 mm) | 72-lead LFCSP (10 x 10 mm) | Package footprint and pinout determine whether the parts are physically interchangeable on an existing PCB. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range confirms suitability for harsh-environment and outdoor applications. |
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 | AD9142BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 2 | 2 |
| Settling Time | 20ns (Typ) | 20ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | LVDS - Parallel | LVDS - Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3.13V ~ 3.47V | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.71V ~ 1.89V | 1.7V ~ 1.9V |
| INL / DNL(LSB) | ±3.7, ±2.1 | ±3.7, ±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 AD9142BCPZRL?
The AD9146BCPZ is a dual 16-bit, 123 MSPS TxDAC+ digital-to-analog converter, while the AD9142BCPZRL is a dual 16-bit, 1600 MSPS TxDAC+ DAC. The AD9142 offers a significantly higher maximum update rate and includes an on-chip PLL and interpolation filters, whereas the AD9146 targets lower-speed applications with a simpler signal chain. Both are offered in a 72-lead LFCSP package.
Are the AD9146BCPZ and AD9142BCPZRL pin-compatible?
Both devices are housed in a 72-lead LFCSP (CP-72) package, but they are not drop-in pin-compatible substitutes. Pin functions and supply rail assignments differ between the two datasheets, so a direct replacement on an existing PCB is not supported without schematic and layout review against the respective manufacturer datasheets.
What is the maximum DAC update rate of each device?
The AD9146BCPZ supports a maximum update rate of 123 MSPS. The AD9142BCPZRL supports a maximum update rate of 1600 MSPS. The higher rate of the AD9142 makes it suitable for wideband and high-frequency synthesis applications.
Do both parts include an on-chip PLL and digital interpolation?
The AD9142BCPZRL integrates an on-chip PLL and digital interpolation filters, allowing it to accept lower-rate input data and upconvert internally. The AD9146BCPZ does not include an on-chip PLL; it relies on an external clock and does not provide the same integrated interpolation signal chain. Designers should confirm the exact feature set in each datasheet before selecting.
What is the resolution and channel count of these DACs?
Both the AD9146BCPZ and the AD9142BCPZRL are dual-channel, 16-bit digital-to-analog converters. Each provides two independent DAC outputs at 16-bit resolution, making them suitable for I/Q transmit signal chains.
Which device is better suited for high-speed wideband transmit applications?
The AD9142BCPZRL is the better fit for high-speed wideband transmit applications because its 1600 MSPS update rate and integrated interpolation and PLL support higher signal bandwidths. The AD9146BCPZ, at 123 MSPS, is intended for lower-speed applications where the higher rate and integrated features of the AD9142 are not required.
What supply and interface considerations should be checked before comparing these parts?
Designers should verify supply rail voltages, current consumption, digital input interface (including LVDS or CMOS data port timing), and clocking requirements against each device's datasheet. Because the two parts differ in maximum update rate and integrated features, the digital interface timing and power budget will differ, and these parameters must be confirmed from the official manufacturer datasheets before substitution.