Part A
AD9146BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2038 Stückzahl
- Package
- LFCSP-48
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9146BCPZ is a pin-compatible, functionally equivalent alternative to the AD9144BCPZ within the same Analog Devices dual 16-bit DAC family, sharing the LFCSP-72 package, supply architecture, and JESD204B serial interface. Designers should validate the reduced maximum update rate and lower power envelope against the target application before adopting it as a drop-in substitute.
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
AD9144BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3069 Stückzahl
- Package
- LFCSP-88
- Series
- Data Acquisition von 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 | AD9144BCPZ | AD9146BCPZ | Why it matters |
|---|---|---|---|
| Resolution (DAC bits) | 16 | 16 | Both are 16-bit DACs, so quantization noise and dynamic range are equivalent; not a differentiator. |
| Maximum Update Rate (MSPS) | 2800 | 1230 | The AD9144 supports much higher sample rates, enabling wider signal bandwidths and higher intermediate frequencies than the AD9146. |
| Number of DAC Channels | 2 | 2 | Both are dual-channel DACs, so channel count is identical and does not affect substitutability. |
| JESD204B Interface Lanes | 8 lanes (JESD204B) | Not supported (LVDS input) | The AD9144 uses a high-speed serial JESD204B interface, while the AD9146 uses a parallel LVDS interface; this fundamentally changes the digital interface and PCB layout requirements. |
| Digital Input Interface | JESD204B serial | LVDS parallel | Interface type determines pin count, routing complexity, and compatibility with the host FPGA/ASIC, making them non-drop-in replacements. |
| Package | 72-lead LFCSP | 48-lead LFCSP | Different package footprints and pin counts mean the two parts are not physically interchangeable on the same PCB. |
| Supply Voltage (Analog/Digital) | 1.8 V / 1.8 V (with 3.3 V I/O) | 1.8 V / 1.8 V (with 3.3 V I/O) | Similar supply requirements simplify power design reuse, though exact rail tolerances should be verified per datasheet. |
| Power Consumption (typical) | ~1.5 W (at 2.8 GSPS) | ~0.6 W (at 1.23 GSPS) | Higher power dissipation of the AD9144 affects thermal design and power budget, which matters when substituting parts. |
| SFDR (at baseband) | ~80 dBc | ~78 dBc | Spurious-free dynamic range affects signal purity; the AD9144 offers slightly better spectral performance. |
| On-chip PLL / Clocking | Integrated PLL with JESD204B clocking | On-chip PLL for DAC clock | Clocking architecture differs; the AD9144's JESD204B-based clocking simplifies multi-lane synchronization but requires different system design. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9146BCPZ | AD9144BCPZ |
|---|---|---|
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 2 | 4 |
| Settling Time | 20ns (Typ) | 20ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | LVDS - Parallel | JESD204B |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | 3.13V ~ 3.47V | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.71V ~ 1.89V | 1.14V ~ 1.26V |
| INL / DNL(LSB) | ±3.7, ±2.1 | ±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 AD9144BCPZ and AD9146BCPZ?
The AD9144BCPZ is a quad-channel, 16-bit, 2.8 GSPS DAC, while the AD9146BCPZ is a dual-channel, 16-bit, 1.2 GSPS DAC. The AD9144 offers twice the channel count and more than twice the maximum update rate, but both share the same 72-lead LFCSP package and JESD204B serial interface architecture.
Are the AD9144BCPZ and AD9146BCPZ pin-compatible?
No. Although both devices are housed in a 72-lead LFCSP package, the AD9144BCPZ uses the additional pins for its two extra DAC channels and associated interfaces. The pin functions and PCB land patterns differ, so they are not drop-in replacements for each other.
What is the maximum DAC update rate for each device?
The AD9144BCPZ supports a maximum DAC update rate of 2.8 GSPS. The AD9146BCPZ supports a maximum DAC update rate of 1.2 GSPS. Designs requiring higher signal bandwidth or oversampling should account for this difference.
Do both devices support the JESD204B serial interface?
Yes. Both the AD9144BCPZ and AD9146BCPZ incorporate a JESD204B serial input interface, enabling high-speed serial data transfer from an FPGA or DSP and supporting deterministic latency and multi-device synchronization.
How do the channel counts compare between the two DACs?
The AD9144BCPZ integrates four 16-bit DACs, making it suitable for multi-antenna and multi-channel transmit architectures. The AD9146BCPZ integrates two 16-bit DACs, making it appropriate for dual-channel transmit paths where fewer channels are required.
Can the AD9146BCPZ be used as a lower-cost alternative to the AD9144BCPZ?
Only if the design requires no more than two DAC channels and a maximum update rate of 1.2 GSPS. Because the devices are not pin-compatible and differ in channel count and speed, substituting one for the other requires a redesign of the DAC interface and PCB layout, validated against the respective datasheets.
What resolution do the AD9144BCPZ and AD9146BCPZ provide?
Both devices are 16-bit DACs, providing the same nominal resolution. The primary differentiators between them are channel count and maximum update rate rather than resolution.