Part A
AD9739ABBCZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3752 PCS
- Package
- BGA-160
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9739ABBCZ is a functionally compatible alternative to the AD9739BBCZ, sharing the same 14-bit 2.5 GSPS DAC core, 160-lead CSP-BGA package, and industrial temperature range. The primary distinction is the maximum update rate grade, where the AD9739BBCZ is specified for 2.5 GSPS operation while the AD9739ABBCZ is rated at 2.0 GSPS. Designers should confirm that the system clock and digital interface timing remain within the lower speed grade before substituting, but otherwise the two devices are pin-compatible and architecturally identical.
Resolution and DAC Architecture
High match
Maximum Update Rate
Validation required
Package and Pinout
High match
Operating Temperature Range
High match
Parts at a glance
Part B
AD9739BBCZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4950 PCS
- Package
- BGA-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 | AD9739ABBCZ | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 14 bit | Bit depth determines the quantization noise floor and achievable dynamic range of the DAC output. |
| Maximum Update Rate | 2500 MSPS | 2500 MSPS | The sample rate sets the maximum synthesizable output frequency and directly affects signal bandwidth capability. |
| Output Type | Current - Unbuffered | Current - Unbuffered | The output architecture determines the external interface circuitry required for signal conditioning. |
| Supply Voltage | 1.8 V, 3.3 V | 1.8 V, 3.3 V | Supply requirements dictate power rail design and compatibility with the surrounding system. |
| Package / Case | 160-LFBGA, CSPBGA | 160-LFBGA, CSPBGA | Package footprint and pinout must match for board-level drop-in substitutability. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | The temperature range defines the environments in which the part can be reliably deployed. |
| Interface | LVDS, SPI | LVDS, SPI | The digital input interface must be compatible with the driving FPGA or controller for functional substitution. |
| Number of D/A Converters | 1 | 1 | The channel count determines whether the part fits single- or multi-channel signal chain architectures. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9739ABBCZ | AD9739BBCZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 14 | 14 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 13µs (Typ) | 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, 3.1V ~ 3.5V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V, 3.1V ~ 3.5V | 1.7V ~ 1.9V, 3.1V ~ 3.5V |
| INL / DNL(LSB) | ±2.5, ±2 | ±1.3, ±0.8 |
| Architecture | Quad-Switch | Quad-Switch |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the primary difference between the AD9739BBCZ and the AD9739ABBCZ?
The AD9739BBCZ and AD9739ABBCZ are both 14-bit, 2.5 GSPS RF digital-to-analog converters from Analog Devices. The suffix difference (A vs B) denotes a speed grade and/or performance binning variant. The AD9739BBCZ is specified for a maximum update rate of 2500 MSPS, while the AD9739ABBCZ is specified for a lower maximum update rate of 2000 MSPS. Both are packaged in a 160-ball CSP_BGA and are functionally pin-compatible.
Are the AD9739BBCZ and AD9739ABBCZ pin-compatible and package-compatible?
Yes. Both devices are offered in the same 160-ball CSP_BGA package (12 mm × 12 mm) with identical pin assignments. This allows the AD9739ABBCZ to be used as a drop-in replacement for the AD9739BBCZ on an existing PCB, provided the system timing and thermal requirements are validated for the lower speed grade.
What are the maximum DAC update rates for each variant?
The AD9739BBCZ supports a maximum DAC update rate of 2500 MSPS. The AD9739ABBCZ supports a maximum DAC update rate of 2000 MSPS. Both devices use a dual-port LVDS input interface and an internal interpolation filter, and both are specified for operation with a DAC clock up to their respective maximum rates.
Do both variants support the same digital input interface and data format?
Yes. Both the AD9739BBCZ and AD9739ABBCZ use a dual-port LVDS data input interface with a maximum input data rate of 1250 MSPS per port (for the B grade) and 1000 MSPS per port (for the A grade), consistent with their respective maximum DAC update rates. Both support binary or twos complement data formatting and include an internal 2× interpolation filter.
Can the AD9739ABBCZ be used in place of the AD9739BBCZ in an existing design?
In many cases yes, because the devices are pin-compatible and share the same package and interface. However, the AD9739ABBCZ has a lower maximum update rate (2000 MSPS vs. 2500 MSPS) and correspondingly lower maximum LVDS input rates. The replacement is valid only if the system clock, data rate, and thermal conditions remain within the AD9739ABBCZ specifications. Analog Devices recommends verifying the design against the AD9739ABBCZ datasheet before substitution.
Are the power supply requirements and power consumption the same for both variants?
Both devices operate from the same supply rails: 1.8 V for the digital and analog sections and 3.3 V for the I/O, with an optional 1.8 V or 3.3 V for the SPI interface. Typical power consumption is similar between the two grades, but the AD9739BBCZ, operating at a higher maximum update rate, may dissipate slightly more power at its maximum rated clock. Designers should refer to the respective datasheet power tables for exact values at the intended operating frequency.
Do both variants share the same temperature range and qualification status?
Yes. Both the AD9739BBCZ and AD9739ABBCZ are specified over the industrial temperature range of −40°C to +85°C (case temperature) and are RoHS-compliant. Both are production-released devices from Analog Devices and are available through authorized distributors such as DigiKey and Mouser.