Part A
AD9717BCPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3375 PCS
- Package
- VFQFN-40
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9717BCPZ and AD9714BCPZRL7 are both dual-channel, 14-bit current-output DACs from the same Analog Devices TxDAC family, sharing a common 40-lead LFCSP footprint and 1.8 V to 3.3 V supply architecture. The primary functional distinction is the maximum update rate, where the AD9717 offers a higher conversion speed than the AD9714. Designers should validate dynamic performance and timing margins at the target sample rate before substituting the lower-speed AD9714 in place of the AD9717.
Resolution
High match
Channel Count
High match
Maximum Update Rate
Validation required
Package Type
High match
Parts at a glance
Part B
AD9714BCPZRL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 460 PCS
- Package
- VFQFN-40
- Series
- Data Acquisition - 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 | AD9714BCPZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 14 bit | Bit depth determines the quantization accuracy and achievable dynamic range of the DAC output. |
| Number of DAC Channels | 2 | 2 | Dual channels enable I/Q signal generation for communications and quadrature applications. |
| Maximum Update Rate | 125 MSPS | 125 MSPS | Sample rate sets the maximum synthesizable output frequency and signal bandwidth. |
| Output Type | Current (differential) | Current (differential) | Current-output DACs require an external load/transformer to develop a voltage and affect interface design. |
| Supply Voltage | 1.8 V to 3.3 V | 1.8 V to 3.3 V | Supply range determines compatibility with the surrounding digital and analog power rails. |
| Package / Case | 40-lead LFCSP (6 x 6 mm) | 40-lead LFCSP (6 x 6 mm) | Package footprint and pinout must match for a drop-in board-level substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms suitability for the target application environment. |
| Interface | Parallel CMOS | Parallel CMOS | Digital input interface must match the driving logic and timing of the host system. |
| On-Chip Reference | Yes | Yes | An integrated reference simplifies board design and reduces external component count. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9717BCPZ | AD9714BCPZRL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 14 | 8 |
| 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) | ±1.8, ±1.7 | ±0.025, ±0.02 |
| 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 AD9714BCPZRL7?
The AD9717BCPZ is a dual 14-bit, 125 MSPS digital-to-analog converter (DAC) in a 40-lead LFCSP package, while the AD9714BCPZRL7 is a dual 8-bit, 125 MSPS DAC in the same 40-lead LFCSP package. The primary difference is resolution: 14-bit versus 8-bit. Both are members of the AD971x family and share the same pinout and package, but the AD9717 offers significantly higher resolution and lower quantization error.
Are the AD9717BCPZ and AD9714BCPZRL7 pin-compatible?
Yes. Both devices are offered in the same 40-lead LFCSP (CP-40) package and belong to the same AD971x family, which uses a common pinout. This allows the AD9714BCPZRL7 to be used as a lower-resolution, lower-cost alternative on a board designed for the AD9717BCPZ, provided the system can tolerate 8-bit resolution.
What is the maximum update rate of these DACs?
Both the AD9717BCPZ and AD9714BCPZRL7 are specified for a maximum update rate of 125 MSPS. The AD971x family also includes 250 MSPS variants, but the BCPZ and BCPZRL7 suffixes correspond to the 125 MSPS speed grade.
What is the resolution and INL of each device?
The AD9717BCPZ provides 14-bit resolution with an integral nonlinearity (INL) of ±1.0 LSB typical. The AD9714BCPZRL7 provides 8-bit resolution with an INL of ±0.1 LSB typical. The higher resolution of the AD9717 makes it suitable for applications requiring finer amplitude control and lower quantization noise.
Do both parts support the same digital interface?
Yes. Both devices use a parallel CMOS input interface with a dual-port architecture and support the same supply and reference configurations. They also share the same on-chip 1.0 V reference and analog output structure, so the digital timing and interface design are identical between the two parts.
What are the typical power consumption figures for these DACs?
At 125 MSPS, the AD9717BCPZ typically consumes approximately 250 mW total (about 125 mW per DAC channel). The AD9714BCPZRL7, with its lower 8-bit resolution, typically consumes less power per channel. Exact power figures should be confirmed against the respective manufacturer datasheets for the specific operating conditions.
Can the AD9714BCPZRL7 be used as a drop-in replacement for the AD9717BCPZ?
It is pin-compatible, but it is not a functional drop-in replacement because the resolution drops from 14 bits to 8 bits. The replacement is only acceptable if the application's dynamic range and quantization noise requirements can be met with 8-bit resolution. System performance should be re-validated after substitution.
What are the common applications for these dual DACs?
Both devices are used in applications such as baseband I/Q signal synthesis, broadband communications transmitters, instrumentation, and arbitrary waveform generation. The AD9717BCPZ is preferred where higher resolution and lower distortion are required, while the AD9714BCPZRL7 suits cost-sensitive designs with relaxed resolution requirements.