Part A
AD9739BBCZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 4950 PCS
- Package
- BGA-160
- Series
- 데이터 수집 - 다이 모드 변환기(DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9736BBCZRL is a viable functional replacement candidate for the AD9739BBCZ in many high-speed DAC applications, sharing the same 160-lead CSP-BGA package, 1.8 V/3.3 V supply architecture, and dual 14-bit/10-bit current-steering DAC topology. However, designers must validate the reduced maximum update rate (1.2 GSPS versus 2.5 GSPS), narrower input data bus width, and lower INL/DNL linearity performance against their specific signal-chain requirements before committing to a drop-in substitution.
Maximum Update Rate
Validation required
Input Data Bus Width
Validation required
Package Type
High match
INL/DNL Linearity
Validation required
Parts at a glance
Part B
AD9736BBCZRL
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 8953 PCS
- Package
- LFBGA-160
- Series
- 데이터 수집 - 다이 모드 변환기(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 | AD9736BBCZRL | Why it matters |
|---|---|---|---|
| Resolution (Bits) | 14 | 14 | Both DACs offer 14-bit resolution, so quantization noise and dynamic range are comparable for signal synthesis. |
| 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 | LVDS (dual-port, DDR) | LVDS (dual-port, DDR) | Both use LVDS dual-port DDR inputs, so the digital interface topology is compatible for board-level substitution. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Matching supply rails simplify power design and allow the same regulator scheme to be reused. |
| Package | 160-ball CSP-BGA | 160-ball CSP-BGA | Identical package and footprint allow drop-in replacement on an existing PCB layout. |
| Power Consumption | ~1.1 W (typical) | ~0.55 W (typical) | The AD9739 dissipates roughly twice the power, affecting thermal design and supply sizing. |
| SFDR | ~78 dBc (at 100 MHz output) | ~75 dBc (at 100 MHz output) | Spurious-free dynamic range determines spectral purity; the AD9739 offers slightly better performance for demanding synthesis. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both parts suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9739BBCZ | AD9736BBCZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| 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, 3.1V ~ 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 | ±1, ±0.6 |
| 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 AD9736BBCZRL?
The AD9739BBCZ is a 14-bit, 2.5 GSPS RF digital-to-analog converter, while the AD9736BBCZRL is a 14-bit, 1.2 GSPS RF DAC. The AD9739 offers a higher maximum update rate and includes a dual-port LVDS data interface with a DLL-based clock management scheme, whereas the AD9736 provides a single-port LVDS interface and operates at 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 AD9739BBCZ and AD9736BBCZRL pin-compatible and package-compatible?
Both devices are offered in the same 160-ball CSP_BGA (BC-160) package with identical body dimensions, but they are not functionally pin-for-pin drop-in replacements. The pin assignments and interface signals differ between the two parts, so a direct PCB substitution without design review is not recommended. Always verify the pinout against the respective Analog Devices datasheets before considering a replacement.
What is the maximum DAC update rate for each device?
The AD9739BBCZ supports a maximum DAC update rate of 2.5 GSPS. The AD9736BBCZRL supports a maximum DAC update rate of 1.2 GSPS. Designs requiring the higher Nyquist bandwidth or higher intermediate frequency synthesis should account for this difference when selecting between the two parts.
What data interface does each converter use?
The AD9739BBCZ uses a dual-port LVDS data interface with a DLL-based clock management scheme to support its 2.5 GSPS operation. The AD9736BBCZRL uses a single-port LVDS data interface. The interface architecture affects FPGA/ASIC pin count, board layout, and the data rate that must be delivered by the digital source.
Do both parts support the same resolution and output configuration?
Yes. Both the AD9739BBCZ and the AD9736BBCZRL are 14-bit current-steering DACs with differential current outputs. Both are designed for direct RF synthesis and support similar output compliance and gain configuration features as documented in their respective Analog Devices datasheets. Resolution alone does not determine interchangeability; sample rate and interface differences must also be evaluated.
Can the AD9736BBCZRL be used as a lower-speed substitute for the AD9739BBCZ?
Only if the target design's required update rate does not exceed 1.2 GSPS and the digital interface can be adapted from dual-port to single-port LVDS. Because the pinouts and interface architectures differ, substitution requires schematic and layout changes plus validation against the AD9736 datasheet. It is not a drop-in replacement.
What package and temperature grade do these devices share?
Both the AD9739BBCZ and the AD9736BBCZRL are supplied in a 160-ball CSP_BGA package and are specified for the industrial temperature range of −40°C to +85°C, as stated in the Analog Devices datasheets. The "BBCZ" suffix indicates the RoHS-compliant BGA package; the "RL" suffix on the AD9736BBCZRL denotes tape-and-reel packaging.
Which device should be selected for higher-frequency RF synthesis?
The AD9739BBCZ is the appropriate choice when the application requires a higher DAC update rate, since its 2.5 GSPS maximum rate supports wider instantaneous bandwidth and higher output frequencies than the 1.2 GSPS maximum rate of the AD9736BBCZRL. Final selection should also consider the digital interface capability of the driving FPGA or ASIC and the power budget, both of which are documented in the respective datasheets.