Part A
AD9146BCPZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2038 個数
- Package
- LFCSP-48
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9146BCPZ is a viable functional replacement candidate for the AD9142ABCPZ in many dual-channel DAC applications, sharing the same 48-lead LFCSP footprint, 16-bit resolution, and 1.8 V/3.3 V supply architecture. However, designers must validate the lower maximum update rate, reduced on-chip interpolation options, and differences in digital interface and JESD204B lane configuration before committing to a drop-in substitution.
Maximum Update Rate
Validation required
Package Type
High match
Digital Interface
Validation required
On-Chip Interpolation
Validation required
Parts at a glance
Part B
AD9142ABCPZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3323 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 | AD9142ABCPZ | AD9146BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit DACs, so quantization noise and dynamic range are comparable for signal synthesis. |
| Maximum Update Rate | 1600 MSPS | 1230 MSPS | Higher update rate enables wider signal bandwidth and higher intermediate frequencies in the transmit path. |
| Number of DAC Channels | 2 | 2 | Dual channels support I/Q transmit architectures; both parts match here for direct substitution. |
| Digital Interface | JESD204B (serial, up to 9.6 Gbps lanes) | LVDS parallel (DDR) | Interface type determines FPGA pin count, board routing complexity, and required clocking scheme; these are not pin-compatible. |
| On-Chip Interpolation | 2x, 4x, 8x | 2x, 4x, 8x | Interpolation filters relax input data rate requirements and shape the output spectrum; both offer the same options. |
| On-Chip NCO / Digital Modulation | Yes (32-bit NCO with digital up-conversion) | Yes (32-bit NCO with digital up-conversion) | Integrated NCO allows digital frequency shifting, reducing external RF mixing stages; both provide this capability. |
| Supply Voltage | 1.8 V (digital), 3.3 V (analog/IO) | 1.8 V (digital), 3.3 V (analog/IO) | Matching supply rails simplify power design and allow reuse of the same regulator scheme. |
| Package | 72-lead LFCSP (10 x 10 mm) | 48-lead LFCSP (7 x 7 mm) | Different package footprint and pinout prevent drop-in board replacement and require layout redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range supports use in 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 | AD9146BCPZ | AD9142ABCPZ |
|---|---|---|
| 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 | 1.71V ~ 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 AD9142ABCPZ and AD9146BCPZ?
The AD9142A is a dual 16-bit, 1600 MSPS TxDAC+ digital-to-analog converter, while the AD9146 is a dual 16-bit, 1230 MSPS TxDAC+ DAC. Both are offered in a 72-lead LFCSP package, but the AD9142A supports a higher maximum update rate and includes an on-chip PLL with a wider frequency range, whereas the AD9146 offers a lower maximum sample rate and lower power consumption at its rated speed.
Are the AD9142ABCPZ and AD9146BCPZ pin-compatible?
Both devices are packaged in a 72-lead LFCSP with the same body size, and Analog Devices documents them as pin-compatible within the TxDAC+ family. However, designers should verify the pin function assignments and any supply or interface differences against the respective datasheets before laying out a common PCB footprint.
What is the maximum DAC update rate for each device?
The AD9142ABCPZ supports a maximum update rate of 1600 MSPS, while the AD9146BCPZ supports a maximum update rate of 1230 MSPS. The higher rate of the AD9142A allows wider signal bandwidths and higher oversampling ratios in transmit applications.
Do both parts include an on-chip PLL for clock generation?
Yes, both the AD9142A and AD9146 integrate an on-chip phase-locked loop (PLL) with a programmable divider to generate the DAC sampling clock from a lower-frequency reference. The PLL frequency range and divider settings differ between the two devices and should be confirmed in each datasheet.
What digital interface do the AD9142ABCPZ and AD9146BCPZ use?
Both devices use a dual-port LVDS input interface for accepting digital data, with support for word and byte loading modes. The AD9142A additionally supports an optional interleaved data bus mode. Interface timing and maximum data rates differ and must be checked against the respective datasheet specifications.
How does power consumption compare between the two DACs?
The AD9146BCPZ is specified with lower power consumption at its maximum 1230 MSPS update rate, while the AD9142ABCPZ consumes more power at its higher 1600 MSPS rate. Actual power depends on sample rate, output frequency, and supply configuration, so designers should consult the power dissipation specifications in each datasheet.
Can the AD9146BCPZ be used as a drop-in replacement for the AD9142ABCPZ?
Not as a direct drop-in replacement without design review. Although both are 72-lead LFCSP dual 16-bit TxDAC+ devices, the AD9142A supports a higher maximum update rate and different PLL and interface capabilities. The system clock plan, data rate, and power budget must be revalidated against the AD9146 datasheet before substitution.
What are the typical applications for these TxDAC+ converters?
Both the AD9142A and AD9146 are intended for wideband transmit applications such as wireless base station transmitters, software-defined radio, point-to-point microwave links, and broadband communications systems. The AD9142A's higher 1600 MSPS rate suits wider-bandwidth or higher-oversampling designs, while the AD9146 targets applications where 1230 MSPS is sufficient with lower power.