Part A
AD9739BBCZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4950 PCS
- Package
- BGA-160
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Not a drop-in replacement
The AD9739BBCZ and AD9734BBCZRL are both 14-bit high-speed DACs from the same family, but they differ in maximum update rate, output interface configuration, and power/thermal characteristics, so the AD9734BBCZRL cannot be treated as a direct drop-in substitute for the AD9739BBCZ without design validation.
Different maximum sample rate
Different output interface
Different power profile
Validation required
Parts at a glance
Part B
AD9734BBCZRL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2852 PCS
- Package
- LFBGA-160
- Series
- Acquisition de données - convertisseur numérique - analogique (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 | AD9739BBCZ | AD9734BBCZRL | Why it matters |
|---|---|---|---|
| Resolution (Bits) | 14 | 10 | 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 update 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 outputs, so the analog interface topology is compatible, but drive levels and matching networks must be re-verified. |
| Input Interface | LVDS (dual-port, DDR) | LVDS (dual-port, DDR) | A matching LVDS dual-port DDR input allows reuse of the same digital data source and PCB routing with minimal redesign. |
| Supply Voltage | 1.8 V and 3.3 V | 1.8 V and 3.3 V | Identical supply rails simplify power-tree reuse, though current consumption and decoupling requirements may still differ. |
| Package | 160-ball CSP-BGA | 160-ball CSP-BGA | A matching package and ballout enables a drop-in footprint, but pin function differences must be confirmed before substitution. |
| Power Consumption (typical) | Approximately 1.1 W at 2.5 GSPS | Approximately 0.6 W at 1.2 GSPS | Lower power dissipation affects thermal design, supply sizing, and long-term reliability in the target system. |
| SFDR (at rated update rate) | Higher SFDR due to 14-bit resolution | Lower SFDR due to 10-bit resolution | Spurious-free dynamic range governs spectral purity and whether the part meets emission and signal-quality requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9739BBCZ | AD9734BBCZRL |
|---|---|---|
| Supplier | - | 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) | ±1.3, ±0.8 | ±0.12, ±0.06 |
| Architecture | Quad-Switch | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Settling Time | 13ns (Typ) | - |
Frequently asked questions
What are the key differences between the AD9739BBCZ and the AD9734BBCZRL?
The AD9739BBCZ is a 14-bit, 2.5 GSPS RF digital-to-analog converter, while the AD9734BBCZRL is a 10-bit, 1.2 GSPS RF DAC. The AD9739 offers higher resolution and a higher maximum update rate, whereas the AD9734 trades resolution and speed for a different power and cost profile. Both are members of Analog Devices' TxDAC family and are supplied in a 160-ball CSP_BGA package.
Are the AD9739BBCZ and AD9734BBCZRL pin-compatible?
Both devices are offered in the same 160-ball CSP_BGA (BC-160) package, and Analog Devices documents them as part of the same pin-compatible TxDAC family. However, designers must verify the specific pin functions and supply requirements against the respective datasheets before considering a direct board-level swap, because the two parts differ in resolution, sample rate, and internal signal path.
What is the maximum update rate of each device?
The AD9739BBCZ supports a maximum DAC update rate of 2.5 GSPS. The AD9734BBCZRL supports a maximum DAC update rate of 1.2 GSPS. The higher update rate of the AD9739 makes it suitable for wider-bandwidth signal synthesis, while the AD9734 targets lower-speed applications.
What resolution does each DAC provide?
The AD9739BBCZ provides 14-bit resolution, and the AD9734BBCZRL provides 10-bit resolution. The additional bits on the AD9739 yield lower quantization noise and better spurious-free dynamic range for demanding wideband synthesis, whereas the 10-bit AD9734 is adequate for applications with less stringent dynamic-range requirements.
Do both parts support the same digital input interface?
Both devices use a dual-port LVDS digital input interface with on-chip data formatting, consistent with the Analog Devices TxDAC architecture. Because the AD9739 operates at a higher maximum update rate and higher resolution, the input data rate and interface timing requirements differ, so the digital source and clocking must be validated against each device's datasheet.
Can the AD9734BBCZRL be used as a drop-in replacement for the AD9739BBCZ?
No. Although both are 160-ball CSP_BGA TxDAC devices, the AD9734BBCZRL has 10-bit resolution and a 1.2 GSPS maximum update rate versus 14-bit resolution and 2.5 GSPS for the AD9739BBCZ. These differences in resolution, speed, and dynamic performance mean the AD9734 cannot meet the same signal-quality requirements, and any substitution must be validated against the target design's specifications.
What are the typical applications for each device?
The AD9739BBCZ, with 14-bit resolution and 2.5 GSPS update rate, is intended for wideband RF signal synthesis, such as cable and broadband infrastructure, instrumentation, and radar. The AD9734BBCZRL, with 10-bit resolution and 1.2 GSPS update rate, targets lower-bandwidth transmit applications where reduced resolution and speed are acceptable. Both are positioned within Analog Devices' RF DAC portfolio for communications and instrumentation signal chains.
How do the power requirements compare between the two devices?
Both devices operate from standard Analog Devices TxDAC supply rails, typically including a 1.8 V digital supply and 3.3 V analog and clock supplies. Because the AD9739BBCZ runs at a higher update rate and higher resolution, its power consumption is generally higher than that of the AD9734BBCZRL. Exact current and power figures should be taken from the respective datasheets for the specific operating conditions.