Part A
AD9739ABBCZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3752 PCS
- Package
- BGA-160
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9739ABBCZ and AD9735BBCZRL are both 14-bit high-speed current-steering DACs from the same Analog Devices TxDAC family, sharing a 160-lead CSP-BGA package and a broadly similar supply and temperature envelope. However, they differ in maximum update rate, on-chip digital features, and power consumption, so the AD9735BBCZRL can serve as a functional substitute for the AD9739ABBCZ only after the system clock budget, digital datapath requirements, and thermal headroom have been validated against the target design.
Resolution and DAC Architecture
Validation required
Maximum Update Rate
Not compatible
Package and Pinout
Validation required
Supply and Power Profile
Validation required
Parts at a glance
Part B
AD9735BBCZRL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5354 PCS
- Package
- LFBGA-160
- 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 | AD9739ABBCZ | AD9735BBCZRL | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Higher resolution provides finer output quantization and lower quantization noise, directly affecting achievable signal fidelity and SFDR in the DAC output. |
| Maximum Update Rate | 2500 MSPS | 1200 MSPS | The update rate determines the maximum synthesizable output frequency and the oversampling ratio available for a given signal bandwidth. |
| Output Type | Current-steering DAC (differential current output) | Current-steering DAC (differential current output) | Both use current-steering architecture, so the analog interface and external output network requirements are similar, aiding substitutability. |
| Input Interface | LVDS, dual-port, with on-chip DLL and data receiver | LVDS, dual-port, with on-chip DLL and data receiver | Matching digital input interfaces simplify board-level redesign when swapping parts, since the FPGA/ASIC drive requirements remain compatible. |
| Supply Voltage | 1.8 V (digital) / 3.3 V (analog) | 1.8 V (digital) / 3.3 V (analog) | Identical supply rails allow reuse of the same power tree and decoupling scheme, reducing redesign effort. |
| Package | 160-lead LFCSP (CSP_BGA) | 160-lead LFCSP (CSP_BGA) | Same package and pinout enable drop-in replacement on an existing PCB footprint without layout changes. |
| Power Consumption | Approximately 1.1 W typical at 2.5 GSPS | Approximately 0.6 W typical at 1.2 GSPS | Power dissipation affects thermal design and supply sizing; the higher-speed device consumes more power, which must be accounted for in the thermal budget. |
| SFDR (Spurious-Free Dynamic Range) | Higher SFDR due to 14-bit resolution and higher update rate | Lower SFDR due to 12-bit resolution and lower update rate | SFDR determines spectral purity and is critical in communications and instrumentation applications where in-band spurs must be minimized. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature ratings mean both parts are suitable for the same environmental conditions and reliability requirements. |
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 | AD9739ABBCZ | AD9735BBCZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Number of Bits | 14 | 12 |
| Number of D/A Converters | 1 | 1 |
| 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 | 1.7V ~ 1.9V, 3.1V ~ 3.5V | 1.7V ~ 1.9V, 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V, 3.1V ~ 3.5V | 1.7V ~ 1.9V, 3.13V ~ 3.47V |
| INL / DNL(LSB) | ±2.5, ±2 | ±0.50, ±0.25 |
| Architecture | Quad-Switch | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Settling Time | 13µs (Typ) | - |
Frequently asked questions
What are the key differences between the AD9739ABBCZ and the AD9735BBCZRL?
The AD9739ABBCZ is a 14-bit, 2.5 GSPS RF digital-to-analog converter, while the AD9735BBCZRL is a 12-bit, 1.2 GSPS DAC. The AD9739ABBCZ offers higher resolution and a significantly higher maximum update rate, making it suitable for wideband applications, whereas the AD9735BBCZRL is a lower-power, lower-speed option for applications with less demanding bandwidth requirements.
Are the AD9739ABBCZ and AD9735BBCZRL pin-compatible?
No, they are not pin-compatible. The AD9739ABBCZ is supplied in an 160-ball CSP_BGA package, while the AD9735BBCZRL is supplied in a 160-lead LQFP package. The different package types and pinouts prevent a direct drop-in replacement without a PCB redesign.
What is the maximum update rate of each device?
The AD9739ABBCZ supports a maximum DAC update rate of 2.5 GSPS. The AD9735BBCZRL supports a maximum DAC update rate of 1.2 GSPS. The higher update rate of the AD9739ABBCZ enables direct RF synthesis at higher frequencies.
How do the resolutions of the AD9739ABBCZ and AD9735BBCZRL compare?
The AD9739ABBCZ provides 14-bit resolution, offering finer amplitude quantization and lower quantization noise. The AD9735BBCZRL provides 12-bit resolution. The 14-bit resolution of the AD9739ABBCZ generally yields better spurious-free dynamic range (SFDR) and signal-to-noise ratio (SNR) performance in wideband signal synthesis.
What are the typical power consumption figures for these DACs?
The AD9739ABBCZ typically consumes approximately 1.1 W at 2.5 GSPS. The AD9735BBCZRL typically consumes approximately 350 mW at 1.2 GSPS. The AD9735BBCZRL is significantly more power-efficient, which is advantageous for power-sensitive designs.
Do both devices support the same digital input interface?
No. The AD9739ABBCZ uses a dual-port LVDS input interface with a maximum input data rate of 1.25 GSPS per port (2.5 GSPS total with DDR). The AD9735BBCZRL uses a single-port LVDS input interface. The interface differences must be considered when selecting a compatible FPGA or digital signal source.
Can the AD9735BBCZRL be used as a drop-in replacement for the AD9739ABBCZ in an existing design?
No. The AD9735BBCZRL cannot be used as a drop-in replacement for the AD9739ABBCZ due to differences in package type (LQFP vs. CSP_BGA), pinout, resolution (12-bit vs. 14-bit), maximum update rate (1.2 GSPS vs. 2.5 GSPS), and digital input interface architecture. A redesign of the PCB and digital interface would be required.
Which device is better suited for wideband RF signal synthesis?
The AD9739ABBCZ is better suited for wideband RF signal synthesis due to its higher 2.5 GSPS update rate and 14-bit resolution, which enable direct synthesis of higher-frequency signals with better dynamic performance. The AD9735BBCZRL, with its 1.2 GSPS update rate and 12-bit resolution, is more appropriate for lower-bandwidth applications where power efficiency is a priority.