Part A
AD9739BBC
ADI公司
- Lifecycle
- Active
- Stock
- 8747 件
- Series
- 資料獲取-數模轉換器（DAC）
Replacement verdict
Not a drop-in replacement
The AD9736BBCZ and AD9739BBC are both 14-bit high-speed DACs from Analog Devices, but they differ in maximum update rate, output interface architecture, and supply configuration, so the AD9739BBC cannot be treated as a direct drop-in substitute for the AD9736BBCZ. Designers must revalidate the clocking, output network, and power scheme before considering substitution.
Different maximum update rate
Different output interface type
Different supply configuration
Different power dissipation
Parts at a glance
Part B
AD9736BBCZ
ADI公司
- Lifecycle
- Active
- Stock
- 5340 件
- Package
- BGA-160
- Series
- 資料獲取-數模轉換器（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 | AD9736BBCZ | AD9739BBC | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 14 bit | Both DACs share the same resolution, so quantization noise floor and SNR potential are comparable. |
| Maximum Update Rate | 1200 MSPS | 2500 MSPS | The AD9739 supports roughly double the sample rate, enabling higher output frequencies and wider signal bandwidths. |
| Output Interface | LVDS (dual-port, DDR) | LVDS (dual-port, DDR) | Both use LVDS dual-port DDR inputs, so the digital interface style is compatible for board-level design. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Matching supply rails simplify power-tree reuse when substituting one part for the other. |
| Package | 160-ball CSP-BGA | 160-ball CSP-BGA | Identical package and ball count allow the same PCB footprint, though pin functions must be verified. |
| Power Consumption | Approx. 1.1 W | Approx. 1.1 W | Similar power draw means thermal design and supply sizing can remain largely unchanged. |
| SFDR | Approx. 82 dBc | Approx. 82 dBc | Comparable spurious-free dynamic range indicates similar spectral purity for signal synthesis. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range supports use in identical environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9739BBC | AD9736BBCZ |
|---|---|---|
| Part Status | Discontinued at DigiKey | Active |
| Base Product Number | AD9739 | - |
| Number of Bits | 14 | 14 |
| Number of D / A Converters | 1 | - |
| Settling Time | 13ns (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 | 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 | - |
| Architecture | Quad-Switch | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tray | - |
| Number of D/A Converters | - | 1 |
| INL / DNL(LSB) | - | ±1, ±0.6 |
Frequently asked questions
What are the key differences between the AD9736BBCZ and AD9739BBC?
The AD9736BBCZ is a 14-bit, 1.2 GSPS RF DAC, while the AD9739BBC is a 14-bit, 2.5 GSPS RF DAC. The AD9739BBC offers a higher maximum update rate and supports a higher input data rate, making it suitable for wider-bandwidth applications. Both are dual-supply (1.8 V and 3.3 V) DACs in a 160-lead CSP_BGA package, but they differ in speed grade and associated dynamic performance specifications.
Are the AD9736BBCZ and AD9739BBC pin-compatible?
Both devices are offered in the same 160-lead CSP_BGA package (BC-160-1), and Analog Devices documents them as pin-compatible within the AD973x family. However, designers should verify the specific pin functions and any speed-grade-dependent pin behavior against the respective datasheets before substituting one for the other on an existing PCB.
What is the maximum DAC update rate for each device?
The AD9736BBCZ supports a maximum DAC update rate of 1.2 GSPS. The AD9739BBC supports a maximum DAC update rate of 2.5 GSPS. The higher update rate of the AD9739BBC enables direct RF synthesis at higher output frequencies.
Do both parts have the same resolution and input interface?
Yes. Both the AD9736BBCZ and AD9739BBC are 14-bit DACs and use a dual-port LVDS input data interface. The primary distinction is the maximum operating speed and the corresponding dynamic performance at those speeds, not the resolution or interface type.
Can the AD9739BBC be used as a drop-in replacement for the AD9736BBCZ?
Because both are 14-bit, pin-compatible devices in the same 160-lead CSP_BGA package, the AD9739BBC can often serve as a higher-speed alternative. However, a drop-in replacement requires validating the system clocking, input data rate, power supply decoupling, and dynamic performance requirements against the AD9739BBC datasheet, since the higher update rate may impose stricter layout and clocking constraints.
What are the typical power supply requirements for these DACs?
Both the AD9736BBCZ and AD9739BBC operate from a 1.8 V digital supply and a 3.3 V analog supply, consistent with the AD973x family architecture. Designers should consult the respective datasheets for exact supply tolerances and current consumption at the intended update rate, as power dissipation scales with operating speed.
Which device is better suited for high-frequency RF synthesis?
The AD9739BBC, with its 2.5 GSPS maximum update rate, is better suited for high-frequency RF synthesis and wideband applications because a higher update rate allows direct digital synthesis at higher output frequencies with wider instantaneous bandwidth. The AD9736BBCZ at 1.2 GSPS is appropriate for lower-frequency or lower-bandwidth signal generation.