AD9774ASZRL Analog Devices Integrated Circuit (Other) In Stock
The AD9774ASZRL is a 14-bit, single-channel D/A converter from Analog Devices with integrated interpolation filters and a parallel word input interface. It is housed in a 44-pin LQFP package and is available on tape-and-reel for volume production.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 44
- Lifecycle
- OBSOLETE
- Datasheet
- AD9774ASZRL Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 14-bit D/A converter with integrated 2× and 4× interpolation filters
- Parallel word input interface for high-throughput digital data transfer
- Single-function DAC core enabling low-latency waveform synthesis
- 44-pin LQFP (S-44-1) package for compact RF and communications board layouts
- Tape-and-reel (ZRL) packaging for automated SMT production lines
Applications
The AD9774ASZRL is designed for digital communications and software-defined radio transmit chains where its 14-bit resolution and on-chip interpolation filters reduce the baseband processing burden on the DSP. It suits ADSL, cable modem, and direct-conversion transmitter designs that require a high-dynamic-range DAC with built-in upsampling to relax reconstruction filter requirements. The device is also applicable in arbitrary waveform generation and test instrumentation where a 14-bit parallel-input DAC with interpolation delivers clean spectral output up to high output update rates.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | S-44-1 |
| YTEOL | 0 |
| Converter Type | D/A CONVERTER |
| Input Bit Code | BINARY |
| Input Format | PARALLEL, WORD |
| JESD-30 Code | S-PQFP-G44 |
| JESD-609 Code | e3 |
| Number of Bits | 14 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP44,.5SQ,32 |
| Package Shape | SQUARE |
| Package Style | FLATPACK |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Settling Time-Nom (tstl) | 0.035 µs |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.8mm |
| Terminal Position | QUAD |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resolution and input format does the AD9774ASZRL use, and what update rates does that enable?
The AD9774ASZRL is a 14-bit DAC with a parallel word input interface, allowing the host DSP or FPGA to transfer full 14-bit samples in a single bus cycle. With integrated 2× or 4× interpolation filters, the DAC core can run at 2× or 4× the input data rate, effectively pushing the imaging aliases far above the signal band and easing the external reconstruction low-pass filter design in ADSL or direct-conversion RF transmitter applications.
How do the on-chip interpolation filters in the AD9774ASZRL reduce system complexity?
The integrated interpolation filters upsample the 14-bit input data by factors of 2× or 4× inside the AD9774ASZRL before conversion. This pushes spectral images to 2× or 4× the input sample rate, dramatically reducing the roll-off requirements of the analog reconstruction filter at the DAC output. In practice, a simple first-order RC or second-order LC filter can replace a complex, high-order anti-imaging filter, cutting BOM cost and PCB area in ADSL, VDSL, and cable modem transmit paths.
Which RF and communications transmit applications suit the AD9774ASZRL best?
The AD9774ASZRL targets wideband transmit signal chains where 14-bit dynamic range is needed alongside digital interpolation. Typical applications include ADSL and VDSL central office line-driver front ends, cable modem upstream transmitters, direct-conversion radio basestations operating below 100 MHz, and software-defined radio (SDR) platforms requiring a DAC with built-in interpolation to reduce FPGA sample-rate requirements while preserving spectral purity.
What package does the AD9774ASZRL use, and what does the ZRL suffix mean for purchasing?
The AD9774ASZRL is packaged in a 44-pin LQFP (Analog Devices code S-44-1, JEDEC S-PQFP-G44) with a 10 mm × 10 mm body and 0.8 mm pin pitch. The ZRL suffix indicates tape-and-reel packaging, typically supplied in 250 or 1000 unit reels, which is required for pick-and-place SMT assembly in volume manufacturing. Engineers ordering small quantities for prototype work should verify whether a tray or tube variant is available.
How does the AD9774ASZRL's 14-bit resolution compare to a 12-bit DAC in a wideband transmit chain?
Moving from 12-bit to 14-bit resolution adds 2 extra bits, increasing the theoretical dynamic range by approximately 12 dB (from about 74 dB to 86 dB SFDR). In a wideband ADSL or multi-carrier OFDM transmitter, this improvement directly reduces spectral re-growth and adjacent-channel interference, allowing the system to meet tighter spectral mask requirements without increasing output power back-off or adding an external high-order reconstruction filter.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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