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 AD9142ABCPZRL is a viable functional replacement candidate for the AD9146BCPZ in dual-channel 16-bit DAC applications, provided the system design accommodates the higher maximum update rate and validates the interface timing and thermal margins under the target operating conditions.
Resolution
High match
Channel Count
High match
Maximum Update Rate
Validation required
Package Type
Validation required
Parts at a glance
Part B
AD9142ABCPZRL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2218 個数
- 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 | AD9146BCPZ | AD9142ABCPZRL | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit DACs, so quantization noise and dynamic range are comparable for high-fidelity signal synthesis. |
| Number of DAC Channels | 2 | 2 | Dual-channel architecture supports I/Q transmit paths; matching channel count is essential for direct RF and quadrature applications. |
| Maximum Update Rate | 1230 MSPS | 1600 MSPS | Higher update rate enables wider instantaneous bandwidth and higher intermediate frequencies, affecting achievable signal bandwidth. |
| Output Type | Current (unbuffered) | Current (unbuffered) | Current-output DACs require external termination and matching networks; identical output topology simplifies analog front-end reuse. |
| Digital Interface | LVDS (DDR) | LVDS (DDR) | Matching LVDS DDR input interfaces allows the same FPGA/ASIC source to drive either part without interface redesign. |
| On-Chip PLL / Clock Multiplier | Yes | Yes | Integrated PLL reduces external clocking complexity and jitter sensitivity; both offering it supports similar clocking architectures. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Identical supply rails allow the same power design and decoupling scheme to be reused across both parts. |
| Package | 72-lead LFCSP | 72-lead LFCSP | Same package and pin count support drop-in PCB layout compatibility, reducing redesign effort for substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching industrial temperature ranges ensure equivalent environmental robustness for the target application. |
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 | AD9142ABCPZRL |
|---|---|---|
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| Digi Key Programmable | - | Not Verified |
| Number of Bits | 16 | 16 |
| Number of D / A Converters | - | 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 |
| Architecture | Current Source | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount |
| Base Product Number | - | AD9142 |
| Number of D/A Converters | 2 | - |
| INL / DNL(LSB) | ±3.7, ±2.1 | - |
Frequently asked questions
What are the key differences between the AD9146BCPZ and the AD9142ABCPZRL?
The AD9146BCPZ is a dual 16-bit, 123 MSPS TxDAC+ digital-to-analog converter, while the AD9142ABCPZRL is a dual 16-bit, 1600 MSPS DAC. The AD9142ABCPZRL 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. Both are dual 16-bit DACs in a 72-lead LFCSP package.
Are the AD9146BCPZ and AD9142ABCPZRL pin-compatible?
No. Although both devices are housed in a 72-lead LFCSP package, they are not pin-compatible. The AD9142ABCPZRL integrates additional functional blocks such as an on-chip PLL and digital interpolation filters, which require different pin assignments. A direct drop-in replacement is not supported; the PCB layout and surrounding circuitry must be redesigned.
What is the maximum DAC update rate of each device?
The AD9146BCPZ supports a maximum update rate of 123 MSPS. The AD9142ABCPZRL supports a maximum update rate of 1600 MSPS. The higher update rate of the AD9142ABCPZRL makes it suitable for wideband and high-frequency signal synthesis applications.
Do both devices include an on-chip PLL for clock generation?
No. The AD9142ABCPZRL includes an on-chip PLL that can generate the DAC sampling clock from a lower-frequency reference, simplifying clock distribution. The AD9146BCPZ does not include an on-chip PLL and requires an externally supplied DAC sampling clock.
What digital interface do these DACs use?
Both the AD9146BCPZ and the AD9142ABCPZRL use a serial peripheral interface (SPI) for configuration and register access. The AD9142ABCPZRL additionally supports a high-speed LVDS data input interface with digital interpolation, while the AD9146BCPZ accepts data at its lower update rate through its parallel input interface.
What is the resolution and channel count of each device?
Both the AD9146BCPZ and the AD9142ABCPZRL are dual-channel (two DACs per package) 16-bit digital-to-analog converters. The 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 wideband RF signal synthesis?
The AD9142ABCPZRL is better suited for wideband RF signal synthesis because its 1600 MSPS update rate and integrated interpolation filters support higher output frequencies and wider instantaneous bandwidths. The AD9146BCPZ, limited to 123 MSPS, is intended for lower-frequency, lower-bandwidth applications.
Can the AD9146BCPZ be replaced by the AD9142ABCPZRL in an existing design?
Not as a direct drop-in replacement. Because the devices are not pin-compatible and differ in clocking architecture, interface, and update rate, replacing the AD9146BCPZ with the AD9142ABCPZRL requires a PCB redesign, updated clocking scheme, and revalidation of the digital interface and signal chain against the AD9142ABCPZRL datasheet.