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
Not a drop-in replacement
The AD9739ABBCZ and AD9734BBCZ are not drop-in replacements for one another. Although both are dual-channel 14-bit current-steering DACs in a 160-lead CSP-BGA package, they differ in maximum update rate, output bandwidth, and supported interface modes, so the AD9734BBCZ cannot directly substitute the AD9739ABBCZ without design validation.
Different maximum update rate
Different output bandwidth
Different interface mode support
Different power consumption
Parts at a glance
Part B
AD9734BBCZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 43 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 | AD9734BBCZ | Why it matters |
|---|---|---|---|
| Resolution (DAC Bits) | 14 bit | 10 bit | Higher resolution provides finer output quantization and lower quantization noise, directly affecting achievable signal fidelity and SFDR. |
| Maximum Update Rate | 2500 MSPS | 1200 MSPS | The maximum DAC clock rate determines the highest synthesizable output frequency and the width of the usable Nyquist band. |
| Output Type | Current-steering (differential current output) | Current-steering (differential current output) | Both use current-steering DAC cores, so the analog interface and external termination/transformer design approach are similar. |
| Digital Input Interface | Dual-port LVDS, DDR | LVDS, DDR | The input data bus format and width must match the upstream FPGA/ASIC driver; differing bus structure affects pin count and layout. |
| Supply Voltage | 1.8 V (digital) / 3.3 V (analog) | 1.8 V (digital) / 3.3 V (analog) | Matching supply rails simplifies power-tree reuse, though current draw and decoupling differ with speed grade. |
| Package | 160-ball CSP-BGA | 160-ball CSP-BGA | Identical package and footprint allow a common PCB land pattern, easing board-level substitution. |
| Power Consumption (typical) | Approx. 1.1 W at 2.5 GSPS | Approx. 0.6 W at 1.2 GSPS | Thermal budget and power-supply sizing depend on dissipation; the higher-speed part draws substantially more power. |
| SFDR (at rated update rate) | Higher SFDR due to 14-bit core | Lower SFDR due to 10-bit core | Spurious-free dynamic range governs spectral purity and suitability for wideband signal synthesis and communications. |
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 | AD9734BBCZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 14 | 10 |
| 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 | ±0.12, ±0.06 |
| 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 AD9734BBCZ?
The AD9739ABBCZ is a 14-bit, 2.5 GSPS RF digital-to-analog converter, while the AD9734BBCZ is a 10-bit, 1.2 GSPS RF DAC. The AD9739ABBCZ offers higher resolution and a higher maximum update rate, whereas the AD9734BBCZ provides lower resolution and a lower maximum sample rate. Both are members of Analog Devices' TxDAC family and are supplied in a 160-ball CSP_BGA package.
Are the AD9739ABBCZ and AD9734BBCZ pin-compatible?
Both devices are offered in the same 160-ball CSP_BGA (BC-160) package footprint, but they are not functionally interchangeable without design validation. Pin functions, supply requirements, and interface timing must be verified against the respective datasheets before any substitution is considered.
What is the maximum DAC update rate for each device?
The AD9739ABBCZ supports a maximum DAC update rate of 2.5 GSPS. The AD9734BBCZ supports a maximum DAC update rate of 1.2 GSPS. Designs requiring higher output bandwidth should account for this difference.
What resolution does each DAC provide?
The AD9739ABBCZ provides 14-bit resolution, while the AD9734BBCZ provides 10-bit resolution. The higher resolution of the AD9739ABBCZ supports lower quantization noise and improved dynamic range in wideband signal synthesis applications.
What digital input interface do these DACs use?
Both the AD9739ABBCZ and AD9734BBCZ use a dual-port LVDS input interface with a DDR (double data rate) data path. The AD9739ABBCZ additionally supports a higher input data rate consistent with its 2.5 GSPS update rate, while the AD9734BBCZ operates at rates consistent with its 1.2 GSPS maximum update rate.
Do both devices require the same power supplies?
Both devices operate from a 1.8 V digital supply and a 3.3 V analog supply, consistent with the Analog Devices TxDAC family. Designers should confirm exact supply rail tolerances, sequencing, and decoupling requirements in the respective datasheets before finalizing the power design.
Can the AD9734BBCZ be used as a drop-in replacement for the AD9739ABBCZ?
No. Although both are 160-ball CSP_BGA devices, the AD9734BBCZ has lower resolution (10-bit vs 14-bit) and a lower maximum update rate (1.2 GSPS vs 2.5 GSPS). A drop-in replacement would require revalidation of the digital interface, clocking, output filtering, and overall system performance against the target specifications.
What are typical applications for these RF DACs?
Both the AD9739ABBCZ and AD9734BBCZ are intended for wideband RF signal synthesis, including applications such as cable infrastructure, wireless base stations, and instrumentation. The AD9739ABBCZ is suited to higher-bandwidth, higher-resolution requirements, while the AD9734BBCZ targets applications where 10-bit resolution and 1.2 GSPS are sufficient.