Part A
AD9142ABCPZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3323 PCS
- Package
- LFCSP-72
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9142ABCPZ and AD9146BCPZRL are both dual-channel 16-bit high-speed DACs from Analog Devices in a 72-lead LFCSP package, sharing the same supply architecture and JESD204B-compatible digital interface family, so the AD9146BCPZRL can serve as a functional replacement candidate for the AD9142ABCPZ provided the system timing budget and output network are re-validated against the differing sample-rate and interface specifications.
Resolution and Channel Count
High match
Maximum Sample Rate
Validation required
Digital Interface Type
Validation required
Package Type
High match
Parts at a glance
Part B
AD9146BCPZRL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2396 PCS
- Package
- WFQFN-48
- Series
- Acquisition de données - convertisseur numérique - analogique (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 | AD9142ABCPZ | AD9146BCPZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit DACs, so quantization noise and dynamic range are comparable; resolution alone does not differentiate them. |
| Number of DAC Channels | 2 | 2 | Both are dual-channel DACs, allowing I/Q signal generation in a single package. |
| Maximum Update Rate | 1600 MSPS | 1230 MSPS | The higher update rate of the AD9142ABCPZ supports wider signal bandwidths and higher intermediate frequencies, which affects achievable output frequency and oversampling margin. |
| Output Type | Current (unbuffered) | Current (unbuffered) | Both require an external transformer or op-amp interface to convert the current output to a voltage, so the analog front-end design approach is similar. |
| Digital Interface | LVDS (DDR) | LVDS (DDR) | Both use a dual-data-rate LVDS input, so the FPGA/ASIC interface and PCB routing requirements are essentially the same. |
| On-Chip Interpolation / NCO | 2x/4x/8x interpolation with digital NCO | 2x/4x/8x interpolation with digital NCO | Both integrate interpolation filters and a numerically controlled oscillator, enabling digital upconversion and reducing FPGA resource usage. |
| Supply Voltage | 1.8 V (digital), 3.3 V (analog) | 1.8 V (digital), 3.3 V (analog) | Identical supply rails mean the same power sequencing and decoupling scheme can be reused. |
| Package | 72-lead LFCSP (10 x 10 mm) | 48-lead LFCSP (7 x 7 mm) | Different package footprints and pin counts mean the two parts are not drop-in compatible; the PCB layout must be redesigned. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both are specified over the industrial temperature range, so they suit the same environmental conditions. |
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 | AD9142ABCPZ | AD9146BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| 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 | 1.7V ~ 1.9V | 1.71V ~ 1.89V |
| INL / DNL(LSB) | ±3.7, ±2.1 | ±3.7, ±2.1 |
| Architecture | Oversampling Interpolating DAC | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9142ABCPZ and the AD9146BCPZRL?
The AD9142A is a dual-channel, 16-bit, 1.6 GSPS DAC with an on-chip PLL and interpolation filters, while the AD9146 is a dual-channel, 16-bit, 1.2 GSPS DAC with similar interpolation and PLL features. The primary differences are the maximum update rate (1.6 GSPS vs 1.2 GSPS), power consumption, and the specific JESD204B lane configuration and serial interface characteristics. Both are offered in a 72-lead LFCSP package.
Are the AD9142ABCPZ and AD9146BCPZRL pin-compatible?
Both devices are housed in a 72-lead LFCSP (CP-72-4) package with the same footprint and pin count. However, pin function assignments and supply rail requirements differ between the two datasheets, so a direct drop-in replacement without schematic and layout review is not recommended. Always verify pin functions against the respective manufacturer datasheets.
What is the maximum DAC update rate for each device?
The AD9142A supports a maximum DAC update rate of 1.6 GSPS, while the AD9146 supports a maximum update rate of 1.2 GSPS. The higher update rate of the AD9142A enables wider signal bandwidths and higher oversampling ratios in transmit signal chains.
Do both devices support JESD204B serial interfaces?
Yes. Both the AD9142A and AD9146 include a JESD204B-compliant serial input interface with configurable lane rates and multi-chip synchronization support. The AD9142A supports lane rates up to 12.5 Gbps, while the AD9146 supports lane rates up to 9.6 Gbps, consistent with their respective maximum DAC update rates.
What is the resolution and channel count of these DACs?
Both the AD9142A and AD9146 are dual-channel (two DACs per package), 16-bit resolution digital-to-analog converters. They are intended for wideband transmit applications such as wireless base stations, cable infrastructure, and instrumentation.
How does power consumption compare between the AD9142ABCPZ and AD9146BCPZRL?
The AD9142A typically consumes more power than the AD9146 due to its higher maximum update rate and higher-speed serial interface. Exact power figures depend on sample rate, interpolation mode, and supply configuration; refer to the respective datasheets for verified typical and maximum power consumption values under specific operating conditions.
Can the AD9146BCPZRL be used as a lower-speed alternative to the AD9142ABCPZ?
Yes, in applications where the required DAC update rate does not exceed 1.2 GSPS and the JESD204B lane rate stays within the AD9146 limits, the AD9146 can serve as a lower-power alternative. However, the design must be re-validated for pin function differences, supply requirements, and digital interface timing before substitution.