Part A
AD9739BBCZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4950 個数
- Package
- BGA-160
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9734BBCZ is a reduced-resolution member of the same AD973x TxDAC family as the AD9739BBCZ, sharing the same 160-lead CSP_BGA package, 1.8 V/3.3 V supply scheme, and dual-port LVDS input interface. It can serve as a functional substitute where 10-bit resolution and a lower maximum update rate are acceptable, but the downgraded DAC resolution, narrower input data bus, and reduced clock ceiling must be validated against the target signal-chain requirements before substitution.
Resolution
Validation required
Maximum Update Rate
Validation required
Package Type
High match
Digital Input Interface
High match
Parts at a glance
Part B
AD9734BBCZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 43 個数
- Package
- LFBGA-160
- Series
- データ取得 - デジタル/アナログコンバータ (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 | AD9734BBCZ | Why it matters |
|---|---|---|---|
| Resolution | 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 | Determines the maximum synthesizable output frequency and the ability to support wideband or high-IF signal generation. |
| Output Interface | LVDS (dual-port, DDR) | LVDS (dual-port, DDR) | The digital input interface must match the FPGA/ASIC driver; differences in port count or timing affect board-level compatibility. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Supply rails must be compatible with the existing power design for a drop-in replacement. |
| Package | 160-ball CSP-BGA | 160-ball CSP-BGA | Package and pinout compatibility is essential for physical board substitution without redesign. |
| Power Consumption | Approx. 1.1 W (typical) | Approx. 0.6 W (typical) | Thermal budget and power supply sizing differ; higher power may require additional thermal management. |
| SFDR | Higher (14-bit architecture) | Lower (10-bit architecture) | Spurious-free dynamic range affects spectral purity and suitability for demanding communication or instrumentation applications. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range compatibility ensures operation in the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9739BBCZ | 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) | ±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 AD9734BBCZ?
The AD9739BBCZ 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 AD9739 offers higher resolution and a faster maximum update rate, whereas the AD9734 provides lower resolution at a reduced sample rate. Both are members of Analog Devices' TxDAC family and are housed in the same 160-ball CSP_BGA package.
Are the AD9739BBCZ and AD9734BBCZ pin-compatible?
Yes. Both devices are specified in the same 160-ball CSP_BGA (BC-160-1) package with a common pinout, which allows board designs to accommodate either converter. However, designers must verify that the surrounding circuitry, clocking, and digital interface support the specific resolution and speed grade of the selected part.
What is the maximum update rate of each converter?
The AD9739BBCZ supports a maximum DAC update rate of 2.5 GSPS. The AD9734BBCZ supports a maximum update rate of 1.2 GSPS. The applicable rate depends on the input data rate and the internal interpolation configuration.
What resolution does each DAC provide?
The AD9739BBCZ provides 14-bit resolution, while the AD9734BBCZ provides 10-bit resolution. The higher resolution of the AD9739BBCZ yields lower quantization noise and improved dynamic range for wideband signal synthesis.
Do both parts use the same digital input interface?
Both devices use a dual-port LVDS digital input interface with a source-synchronous DDR clock and support for input data rates up to 1.25 GSPS per port. The AD9739BBCZ additionally supports 2x and 4x interpolation, while the AD9734BBCZ supports 2x interpolation. Designers should confirm the specific interface configuration against the respective datasheets.
Can the AD9734BBCZ be used as a drop-in replacement for the AD9739BBCZ?
Because both parts share the same package and pinout, the AD9734BBCZ can be placed on a board designed for the AD9739BBCZ. However, it is not a functional drop-in replacement: the AD9734BBCZ has lower resolution (10-bit vs. 14-bit) and a lower maximum update rate (1.2 GSPS vs. 2.5 GSPS), so system performance and firmware configuration must be revalidated.
What are the typical applications for these RF DACs?
Both the AD9739BBCZ and AD9734BBCZ are intended for wideband RF signal synthesis applications such as cable modem termination systems, broadband communications, radar, and instrumentation. The AD9739BBCZ is preferred where higher resolution and faster update rates are required, while the AD9734BBCZ suits cost-sensitive designs with lower bandwidth and resolution needs.
Do both converters operate from the same supply voltages?
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 consult the respective datasheets for exact supply tolerances, current consumption, and power dissipation figures before finalizing the power design.