Part A
AD9715BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3252 Stückzahl
- Package
- VFQFN-40
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9715BCPZ is a lower-resolution member of the same Analog Devices TxDAC family as the AD9717BCPZ, sharing the same 40-lead LFCSP footprint, 1.8 V to 3.3 V supply range, and dual 14-bit/12-bit current-output architecture. It can serve as a functional substitute where reduced DAC resolution is acceptable, but the resolution difference and the corresponding dynamic-performance specifications must be validated against the target application requirements before substitution.
Package and Pinout
High match
Supply Voltage Range
High match
DAC Resolution
Validation required
Dynamic Performance
Validation required
Parts at a glance
Part B
AD9717BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3375 Stückzahl
- Package
- VFQFN-40
- 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 | AD9717BCPZ | AD9715BCPZ | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 10 bit | Higher resolution provides finer output quantization and lower quantization noise, directly affecting signal fidelity and SFDR performance. |
| Number of DAC Channels | 2 | 2 | Dual channels enable I/Q signal generation for quadrature modulation; both parts are dual, so channel count is not a differentiator. |
| Maximum Update Rate | 125 MSPS | 125 MSPS | Update rate determines the maximum synthesizable output frequency and bandwidth; identical rates mean similar spectral capability. |
| SFDR at fOUT = 10 MHz | 84 dBc | 78 dBc | Spurious-free dynamic range indicates spectral purity; the higher-resolution part offers better SFDR, which is critical for communication and instrumentation applications. |
| INL (Integral Nonlinearity) | ±1.0 LSB | ±0.5 LSB | INL affects DC accuracy and linearity of the transfer function; lower INL in LSB terms can translate to better absolute linearity depending on resolution. |
| DNL (Differential Nonlinearity) | ±0.5 LSB | ±0.25 LSB | DNL guarantees monotonicity and affects low-level signal distortion; tighter DNL ensures no missing codes. |
| Supply Voltage | 1.8 V to 3.3 V | 1.8 V to 3.3 V | Supply range determines compatibility with system power rails; identical ranges allow drop-in replacement from a power perspective. |
| Package | 40-Lead LFCSP (6x6 mm) | 40-Lead LFCSP (6x6 mm) | Package and pinout compatibility is essential for physical substitutability on an existing PCB. |
| Power Consumption | ~100 mW | ~85 mW | Power consumption affects thermal design and system efficiency; the lower-resolution part typically dissipates less power. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation across environments; identical ranges support equivalent application use. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9715BCPZ | AD9717BCPZ |
|---|---|---|
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 10 | 14 |
| Number of D/A Converters | 2 | 2 |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 1.7V ~ 3.5V | 1.7V ~ 3.5V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V | 1.7V ~ 1.9V |
| INL / DNL(LSB) | ±0.13, ±0.08 | ±1.8, ±1.7 |
| Architecture | Current Source | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9717BCPZ and AD9715BCPZ?
Both are dual-channel, 14-bit current-output DACs from Analog Devices in a 40-lead LFCSP package, but they differ in maximum update rate and dynamic performance. The AD9717BCPZ supports a maximum update rate of 125 MSPS, while the AD9715BCPZ supports up to 65 MSPS. The AD9717 also offers higher SFDR and IMD performance at a given output frequency, making it better suited for higher-bandwidth applications.
Are the AD9717BCPZ and AD9715BCPZ pin-compatible?
Yes. Both devices are offered in the same 40-lead LFCSP (CP-40) package with an identical pinout, so they are pin-compatible. This allows a common PCB footprint, but the AD9717BCPZ should only be used where the board and clocking support its higher 125 MSPS update rate.
What is the resolution and channel count of these DACs?
Both the AD9717BCPZ and AD9715BCPZ are dual-channel (two DACs per package), 14-bit resolution, current-output digital-to-analog converters. They share the same 14-bit architecture and differ primarily in speed grade and AC performance.
What supply voltages do the AD9717BCPZ and AD9715BCPZ require?
Both devices operate from a 1.8 V to 3.3 V analog supply and a 1.8 V to 3.3 V digital supply, with a separate flexible I/O supply (DVDDIO) that supports 1.8 V to 3.3 V logic levels. The current-output DAC architecture requires an external resistor to set the full-scale output current.
What is the maximum update rate of each device?
The AD9717BCPZ has a maximum update rate of 125 MSPS, while the AD9715BCPZ has a maximum update rate of 65 MSPS. Designs requiring output frequencies above roughly 30 MHz should generally select the AD9717BCPZ for adequate dynamic performance.
Do these DACs include an on-chip voltage reference?
Yes. Both the AD9717BCPZ and AD9715BCPZ integrate an on-chip reference, and they also support an external reference if higher accuracy or drift control is required. The full-scale output current is set by an external resistor connected to the FSADJ pin.
What digital interface do the AD9717BCPZ and AD9715BCPZ use?
Both parts use a parallel LVCMOS-compatible input interface with separate data ports for each DAC channel, along with a differential clock input. They also provide a serial peripheral interface (SPI) for configuration and control of internal registers.
Can the AD9715BCPZ be used as a drop-in replacement for the AD9717BCPZ?
Because they are pin-compatible, the AD9715BCPZ can physically replace the AD9717BCPZ, but only if the system's required update rate is 65 MSPS or less and the reduced dynamic performance is acceptable. The AD9717BCPZ cannot be substituted where the design relies on the higher 125 MSPS rate without re-validating clocking, filtering, and thermal performance.