Part A
AD9777BSVZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2987 ПКС
- Package
- TQFP-80
- Series
- Сбор данных - цифровые в аналоговые преобразователи (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9777BSVZ and AD9775BSVZRL are both dual-channel 16-bit high-speed DACs from Analog Devices in the same 80-lead TQFP_EP package, sharing core architecture and supply requirements. The AD9777BSVZ offers a higher maximum update rate and wider input data interface, making it a viable functional substitute for the AD9775BSVZRL in most designs, provided the system timing budget and digital interface width are validated against the higher-speed device.
Resolution and Channel Count
High match
Package Type
High match
Maximum Update Rate
Validation required
Input Data Interface
Validation required
Parts at a glance
Part B
AD9775BSVZRL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2746 ПКС
- Package
- TQFP-80
- Series
- Сбор данных - цифровые в аналоговые преобразователи (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 | AD9777BSVZ | AD9775BSVZRL | Why it matters |
|---|---|---|---|
| Resolution (DAC Bits) | 16 bit | 14 bit | Higher resolution provides finer output quantization and lower quantization noise, which directly affects achievable signal fidelity and SFDR in the target application. |
| Maximum Update Rate | 160 MSPS | 400 MSPS | The maximum DAC update rate determines the highest synthesizable output frequency and the interpolation headroom available for a given input data rate. |
| Maximum Input Data Rate | 50 MSPS | 100 MSPS | The input data rate limits the baseband bandwidth the device can accept before interpolation, affecting system throughput and interface timing requirements. |
| Interpolation Factor | 2x / 4x / 8x | 2x / 4x / 8x | Selectable interpolation filters relax the analog reconstruction filter requirements and shift images away from the band of interest. |
| SFDR at fout | 84 dBc (at 10 MHz, 160 MSPS) | 75 dBc (at 10 MHz, 400 MSPS) | Spurious-free dynamic range indicates the usable dynamic range before spurs corrupt the signal, critical for communications and instrumentation applications. |
| Supply Voltage | 3.3 V (analog and digital) | 3.3 V (analog and digital) | Supply voltage compatibility determines whether the part can drop into an existing power rail design without level shifting or regulator changes. |
| Package | 80-lead TQFP (TQFP-80) | 80-lead TQFP (TQFP-80) | Package and pinout compatibility is essential for board-level substitutability and thermal/assembly considerations. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The industrial temperature range confirms suitability for the same environmental conditions and reliability requirements. |
| On-Chip PLL / Clock Multiplier | Yes (2x to 8x) | Yes (2x to 8x) | An integrated clock multiplier simplifies clock distribution and reduces the number of external components needed for the DAC clock. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9777BSVZ | AD9775BSVZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| Number of Bits | 16 | 14 |
| Number of D/A Converters | 2 | 2 |
| Settling Time | 11µs (Typ) | 11ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3.1V ~ 3.5V | 3.1V ~ 3.5V |
| Voltage - Supply, Digital | 3.1V ~ 3.5V | 3.1V ~ 3.5V |
| INL / DNL(LSB) | ±6, ±3 | ±1.5, ±1 |
| Architecture | Oversampling Interpolating DAC | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9777BSVZ and AD9775BSVZRL?
Both are dual-channel 16-bit digital-to-analog converters from Analog Devices in a 100-lead TQFP_EP package. The AD9777BSVZ is specified for a maximum update rate of 400 MSPS, while the AD9775BSVZRL is specified for 160 MSPS. The AD9777 also offers higher interpolation ratios (up to 8x) compared with the AD9775 (up to 4x), making the AD9777 better suited to higher-frequency signal synthesis.
Are the AD9777BSVZ and AD9775BSVZRL pin-compatible?
Yes. Both devices are offered in the same 100-lead TQFP_EP (SVZ) package with the same pinout, so they are pin-compatible. However, pin compatibility does not guarantee functional equivalence; the maximum sample rate, interpolation options, and power consumption differ and must be validated against the design requirements.
What is the difference in maximum DAC update rate between these two parts?
The AD9777BSVZ supports a maximum DAC update rate of 400 MSPS, whereas the AD9775BSVZRL supports up to 160 MSPS. Designs requiring output signals above the AD9775 limit must use the AD9777 or another higher-speed converter.
Do both parts support the same digital interpolation ratios?
No. The AD9777BSVZ provides selectable 2x, 4x, and 8x interpolation, while the AD9775BSVZRL provides 2x and 4x interpolation. The additional 8x mode on the AD9777 allows a lower input data rate for a given DAC output rate.
What is the difference in power consumption between the AD9777BSVZ and AD9775BSVZRL?
The AD9775BSVZRL typically consumes about 330 mW at 160 MSPS, while the AD9777BSVZ typically consumes about 1.1 W at 400 MSPS. The higher power of the AD9777 reflects its higher update rate and additional interpolation capability, so thermal design must account for the selected device.
Can the AD9775BSVZRL be used as a drop-in replacement for the AD9777BSVZ?
Not unconditionally. Although the package and pinout match, the AD9775BSVZRL has a lower maximum update rate (160 MSPS vs 400 MSPS) and lacks the 8x interpolation mode of the AD9777BSVZ. A drop-in replacement is only valid if the design operates within the AD9775 limits and does not rely on 8x interpolation.
What is the difference between the BSVZ and BSVZRL ordering suffixes?
The BSVZ suffix denotes the 100-lead TQFP_EP package in tray form, while the BSVZRL suffix denotes the same package supplied in tape-and-reel format for automated assembly. The silicon device is identical within each respective part number; only the packaging and shipping format differ.
Are both converters suitable for wideband signal synthesis applications?
Both are dual 16-bit DACs with on-chip interpolation filters suitable for communications and signal synthesis. The AD9777BSVZ, with its 400 MSPS update rate and 8x interpolation, supports wider output bandwidths, while the AD9775BSVZRL at 160 MSPS is appropriate for lower-bandwidth applications within its specified rate.