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 AD9142BCPZ are both dual-channel 16-bit high-speed DACs from Analog Devices in the same 72-lead LFCSP package, sharing the same supply architecture and JESD204B serial interface family. The AD9146BCPZ offers a higher maximum update rate and wider output bandwidth, while the AD9142BCPZ trades some sample-rate headroom for a lower power profile. Because the two devices are pin-compatible and functionally aligned, the AD9146BCPZ can serve as a higher-performance substitute for the AD9142BCPZ in most designs, provided the system clock, JESD204B lane configuration, and thermal budget are revalidated against the higher-speed device.
Package and Pinout
High match
Resolution and Channel Count
High match
Maximum Update Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD9142BCPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1 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 | AD9142BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit DACs, so quantization noise and dynamic range are comparable for signal synthesis. |
| Number of DAC Channels | 2 | 2 | Dual-channel architecture supports I/Q transmit paths in both parts, enabling complex modulation schemes. |
| Maximum Update Rate | 1230 MSPS | 1600 MSPS | Higher update rate in the AD9142 allows wider instantaneous bandwidth and higher intermediate frequency synthesis. |
| Maximum Input Data Rate | 1230 MSPS | 1600 MSPS | Determines the maximum digital sample rate the JESD204B interface can accept, affecting achievable signal bandwidth. |
| JESD204B Lane Rate | Up to 3.7 Gbps | Up to 4.8 Gbps | Higher lane rate in the AD9142 supports faster serial data transfer and higher DAC update rates over the same lanes. |
| JESD204B Lane Count | 1, 2, or 4 lanes | 1, 2, or 4 lanes | Lane configurability affects board routing complexity and FPGA interface requirements; both offer the same flexibility. |
| Output Type | Current-steering DAC | Current-steering DAC | Current output requires an external transformer or op-amp for voltage conversion; identical output topology eases substitution. |
| Package | 72-lead LFCSP (10 x 10 mm) | 72-lead LFCSP (10 x 10 mm) | Identical package and footprint allow drop-in replacement on existing PCB layouts. |
| Supply Voltage | 1.8 V and 3.3 V | 1.8 V and 3.3 V | Same supply rails simplify power design and allow reuse of existing power sequencing circuitry. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range ensures both parts suit the same environmental conditions. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9146BCPZ | AD9142BCPZ |
|---|---|---|
| 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 AD9142BCPZ?
The AD9146BCPZ is a dual 16-bit, 123 MSPS TxDAC+ digital-to-analog converter, while the AD9142BCPZ is a dual 16-bit, 1600 MSPS TxDAC+ DAC. The AD9142BCPZ offers a significantly higher maximum update rate and includes an on-chip PLL and interpolation filters, whereas the AD9146BCPZ targets lower-speed applications with a simpler signal chain.
Are the AD9146BCPZ and AD9142BCPZ pin-compatible?
No. Both devices are offered in a 72-lead LFCSP package, but their pin functions and internal signal routing differ due to different feature sets (the AD9142BCPZ integrates a PLL, interpolation filters, and a serial port interface with different register maps). A direct drop-in replacement is not supported; the PCB layout and control interface must be validated against each datasheet.
What is the maximum DAC update rate of each device?
The AD9146BCPZ supports a maximum update rate of 123 MSPS. The AD9142BCPZ supports a maximum update rate of 1600 MSPS. Designs requiring high intermediate frequency synthesis or wideband signal generation should account for this difference.
Do both parts include an on-chip PLL for clock generation?
No. The AD9142BCPZ integrates an on-chip PLL with a programmable divider, allowing a lower-frequency reference clock to generate the DAC sampling clock. The AD9146BCPZ does not include an on-chip PLL and requires an external clock source at the DAC update rate.
What digital interface do these DACs use?
Both devices provide a dual-port LVDS input interface for accepting digital data. The AD9142BCPZ additionally supports digital interpolation filters and a serial port interface (SPI) for configuration, while the AD9146BCPZ provides a simpler control interface without integrated interpolation.
What is the resolution and channel count of both converters?
Both the AD9146BCPZ and AD9142BCPZ are dual-channel (two DACs per package) 16-bit digital-to-analog converters. Resolution and channel count are identical; the primary differences lie in update rate, integrated PLL, and digital signal processing features.
Which device is better suited for high-speed wideband applications?
The AD9142BCPZ is better suited for high-speed wideband applications because its 1600 MSPS update rate and integrated interpolation filters enable direct synthesis at higher intermediate frequencies. The AD9146BCPZ, at 123 MSPS, is intended for lower-speed, lower-power signal generation where its simpler architecture is sufficient.