Part A
AD9736BBCZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5340 Stückzahl
- Package
- BGA-160
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9736BBCZ is a viable functional replacement candidate for the AD9739BBCZ in many designs, sharing the same 160-lead CSP-BGA package, 1.8 V/3.3 V supply architecture, and LVDS input interface. However, the AD9739BBCZ offers a higher maximum update rate and superior dynamic performance, so the AD9736BBCZ should only be substituted where the reduced sample rate and slightly lower AC linearity still satisfy the system budget. Pin-level and decoupling verification is recommended before committing to production.
Maximum Update Rate
Validation required
Package Type
High match
Digital Input Interface
High match
Dynamic Performance
Validation required
Parts at a glance
Part B
AD9739BBCZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4950 Stückzahl
- Package
- BGA-160
- 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 | AD9739BBCZ | AD9736BBCZ | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 14 bit | Both DACs share the same 14-bit resolution, so quantization noise floor and dynamic range are comparable. |
| Maximum Update Rate | 2500 MSPS | 1200 MSPS | The AD9739 supports a much higher sample rate, enabling wider signal bandwidths and higher intermediate frequencies than the AD9736. |
| Output Interface | Dual-port LVDS (DDR) | LVDS (DDR) | The input data interface differs, affecting FPGA/ASIC pin count, board routing, and the digital controller logic required to drive the DAC. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Identical supply rails simplify power-tree reuse, though current draw and decoupling differ with clock rate. |
| Package | 160-ball CSP-BGA | 160-ball CSP-BGA | Same package and footprint allow a common PCB land pattern, but pin functions and layout constraints must still be verified. |
| Power Consumption (typical) | Approx. 1.1 W at 2.5 GSPS | Approx. 0.5 W at 1.2 GSPS | Higher sample rate drives higher power dissipation, impacting thermal design, supply sizing, and enclosure cooling. |
| SFDR (at rated update rate) | Higher SFDR at 2.5 GSPS | Lower SFDR at 1.2 GSPS | Spurious-free dynamic range determines spectral purity; the faster device generally offers better SFDR at high output frequencies. |
| Clock Input | Differential clock with on-chip PLL | Differential clock with on-chip PLL | Both integrate a PLL for clock multiplication, but maximum clock frequency and jitter performance differ with the rated update rate. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9736BBCZ | AD9739BBCZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 14 | 14 |
| 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, 3.13V ~ 3.47V | 1.7V ~ 1.9V, 3.1V ~ 3.5V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V, 3.13V ~ 3.47V | 1.7V ~ 1.9V, 3.1V ~ 3.5V |
| INL / DNL(LSB) | ±1, ±0.6 | ±1.3, ±0.8 |
| Architecture | Oversampling Interpolating DAC | Quad-Switch |
| 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 AD9736BBCZ?
The AD9739BBCZ is a 14-bit, 2.5 GSPS RF digital-to-analog converter, while the AD9736BBCZ is a 14-bit, 1.2 GSPS RF DAC. Both are members of Analog Devices' TxDAC family and share the same 160-lead CSP_BGA package, but the AD9739BBCZ offers a higher maximum update rate and includes features such as dual-port LVDS data input and a higher-speed interface, whereas the AD9736BBCZ supports a maximum update rate of 1.2 GSPS.
Are the AD9739BBCZ and AD9736BBCZ pin-compatible?
Both devices are offered in the same 160-lead CSP_BGA package (BCZ suffix), and Analog Devices documents them as pin-compatible within the TxDAC family. However, designers should verify the specific pin functions and interface requirements against the respective datasheets before substituting one for the other in an existing layout.
What is the maximum update rate of each device?
The AD9739BBCZ supports a maximum DAC update rate of 2.5 GSPS, while the AD9736BBCZ supports a maximum update rate of 1.2 GSPS. The higher rate of the AD9739BBCZ makes it suitable for wider-bandwidth signal synthesis applications.
What is the resolution and output type of these DACs?
Both the AD9739BBCZ and AD9736BBCZ are 14-bit current-output DACs. They provide differential current outputs and are intended for direct RF synthesis in applications such as cable infrastructure, broadband communications, and instrumentation.
Do the AD9739BBCZ and AD9736BBCZ support the same digital input interface?
Both devices use a LVDS-compatible digital input interface, but the AD9739BBCZ employs a dual-port LVDS data interface designed to support its higher 2.5 GSPS update rate, while the AD9736BBCZ uses a single-port LVDS interface appropriate for its 1.2 GSPS maximum rate. The interface configuration and timing must be checked against each datasheet when migrating between the two.
Can the AD9736BBCZ be used as a drop-in replacement for the AD9739BBCZ?
Not directly. Although both share the same package and 14-bit resolution, the AD9739BBCZ supports a higher maximum update rate and a different digital interface configuration. A drop-in replacement requires validating clocking, interface timing, and output filtering against the target design and the AD9736BBCZ datasheet.
What are the typical applications for these DACs?
Both the AD9739BBCZ and AD9736BBCZ are used in broadband communications, cable infrastructure, instrumentation, and direct RF synthesis applications. The AD9739BBCZ's higher 2.5 GSPS update rate suits wider-bandwidth synthesis, while the AD9736BBCZ's 1.2 GSPS rate suits applications with lower bandwidth requirements.