AD9751ASTZ - 10-Bit 300 MSPS TxDAC+ DAC | Analog Devices
MPN: AD9751ASTZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $45.2 | $45.20 |
| 10 | $44.59 | $445.90 |
| 100 | $40.95 | $4,095.00 |
| 500 | $37.8 | $18,900.00 |
| 1,000 | $35.6 | $35,600.00 |
Drop-in alternatives for AD9751ASTZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD9751AST
β Drop-Inπ Reference alternative (not in catalog)
AD9753ASTZ
β Drop-Inπ Reference alternative (not in catalog)
AD9755ASTZ
β Drop-Inπ Reference alternative (not in catalog)
AD9752ASTZ
β‘ Same Packageπ Reference alternative (not in catalog)
AD9750ASTZ
β‘ Same Packageπ Reference alternative (not in catalog)
AD9751ASTZ Maximum Ratings & Electrical Characteristics
| Resolution | 10 Bit |
| Number of DACs | 1 |
| Maximum Update Rate | 300 MSPS |
| Architecture | TxDAC+ CMOS DAC |
| Interface Type | Dual muxed port parallel |
| Supply Voltage | 3 V to 3.6 V |
| Package / Case | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Voltage Reference | Integrated |
| Output Configuration | [DATA_NEEDED: output type] |
| Operating Temperature Range | [DATA_NEEDED: operating temperature] |
| INL | [DATA_NEEDED: INL] |
| DNL | [DATA_NEEDED: DNL] |
| SFDR | [DATA_NEEDED: SFDR] |
| Power Dissipation | [DATA_NEEDED: power dissipation] |
| RoHS | unknown |
| Lead-Free Designation | Z suffix |
| MSL Level | [DATA_NEEDED: MSL] |
AD9751ASTZ Pin Configuration
| Pin [DATA_NEEDED] | VDD β Positive supply, 3 V to 3.6 V |
| Pin [DATA_NEEDED] | GND β Ground return |
| Pin [DATA_NEEDED] | CLK/CLOCK β Update clock input, supports up to 300 MSPS |
| Pin [DATA_NEEDED] | DATA0-DATA9 β Parallel digital data inputs via dual muxed port |
| Pin [DATA_NEEDED] | IOUTA β DAC differential current output, positive |
| Pin [DATA_NEEDED] | IOUTB β DAC differential current output, negative |
| Pin [DATA_NEEDED] | REFIO β Voltage reference input/output |
| Pin [DATA_NEEDED] | FS_ADJ β Full-scale output current adjust |
| Pin [DATA_NEEDED] | COMP1 β Compensation pin 1 |
| Pin [DATA_NEEDED] | COMP2 β Compensation pin 2 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD9751ASTZ is suitable for 6 applications: Direct Digital Synthesis (DDFS), Wireless Base Station Transmit Path, Arbitrary Waveform Generation (AWG), Radar and Electronic Warfare Exciters, Communications Test Equipment, Broadcast IF Generation.
Direct Digital Synthesis (DDFS)
The AD9751ASTZ is well suited to direct digital synthesis because its 300 MSPS update rate allows reconstruction of carrier waveforms up to roughly half the sample rate. In a typical FPGA DDFS system, the phase accumulator output is fed through the dual muxed port to the DAC at a lower I/O clock, reducing interface timing pressure. The 10-bit resolution gives a good balance between spurious performance and data bus width. An anti-alias low-pass filter is required at the current outputs. This component is chosen when a 100 MSPS-class DAC would limit maximum output frequency or settling performance.
Recommended
Wireless Base Station Transmit Path
The TxDAC+ architecture in the AD9751ASTZ is optimized for communication transmit paths. A 300 MSPS update rate supports IF generation at tens to greater than 100 MHz while maintaining 10-bit waveform fidelity. The dual muxed port separates data into lower-rate streams, simplifying digital baseband handoff from FPGA or ASIC logic. On-chip voltage reference and current-steering output reduce external component count, while differential IOUTA/IOUTB drive transformer-coupled mixers or amplifiers. The 3 V to 3.6 V supply range aligns with I/O domains used in modern transceiver SoCs. This makes the part suitable for picocell, repeaters, and general RF upconversion stages.
Recommended
Arbitrary Waveform Generation (AWG)
Arbitrary waveform generators require high update rates and low glitch energy. The AD9751ASTZ provides 300 MSPS sample update, enabling complex waveforms with fast slew transitions for bench instruments and automated test equipment. The 10-bit data word is easily produced by an FPGA memory subsystem; the dual muxed interface allows two half-rate streams to be multiplexed internally. For multi-tone or modulated waveforms, the current output can be converted to voltage through a transimpedance amplifier and reconstruction filter. Its 3.3 V operation and integrated reference simplify power supply design. This DAC is a practical choice when cost and update rate take precedence over resolution greater than 10 bits.
Recommended
Radar and Electronic Warfare Exciters
Radar and electronic warfare waveform generation needs DACs that can produce chirps, pulsed waveforms, and frequency-hopped signals at high speed. The AD9751ASTZ supports 300 MSPS output while accepting dual muxed digital data, easing FPGA-to-DAC timing inside dense signal processing boards. 10-bit resolution is sufficient for many radar excitation and EW simulation channels, while the small 48-lead LQFP package helps board density. Differential current outputs can drive mixers or directly feed IF chains. The integrated voltage reference cuts BOM and improves temperature stability. Use this part in compact radar target simulators and EW exciter modules.
Recommended
Communications Test Equipment
Communications testers demand known spectral purity and repeatable analog outputs. The AD9751ASTZ as a 300 MSPS 10-bit DAC can generate multi-tone signals, QAM/OFDM waveforms, and interference profiles in signal generators or channel emulators. The dual muxed port accepts lower-rate parallel data, simplifying software-defined radio front-end design. The deterministic current-steering architecture and integrated reference support repeatable output levels. 3 V to 3.6 V operation enables direct connection to 3.3 V FPGA banks. For production test instruments that need high update rates without the cost of 14-bit parts, the AD9751ASTZ provides a suitable price/performance point.
Recommended
Broadcast IF Generation
Broadcast transmitters and digital TV modulators use DACs to create IF signals before upconversion. The AD9751ASTZ's 300 MSPS update rate and 10-bit resolution are appropriate for DVB/ATSC IF generation and low-power transmitter drivers. The integrated voltage reference reduces external drift, while the differential current outputs provide clean drive to baluns and mixers. Because it is a single-channel dual-port TxDAC+, the digital interface can run at half the DAC clock, simplifying PCB routing from the modulator FPGA. Supply range 3 V to 3.6 V matches common 3.3 V logic. This part suits narrowband and moderate bandwidth broadcast IF chains where cost per channel matters.
Recommended
Recommended Products Summary
Engineering reference data for AD9751ASTZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD9751AST | AD9752ASTZ | AD9753ASTZ | AD9755ASTZ | AD9750ASTZ |
|---|---|---|---|---|---|---|
| Package | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 Bit | 10 Bit | 12 Bit | 12 Bit | 14 Bit | 10 Bit |
| Maximum Update Rate | 300 MSPS | 300 MSPS | [DATA_NEEDED: max update rate] | [DATA_NEEDED: max update rate] | [DATA_NEEDED: max update rate] | [DATA_NEEDED: max update rate] |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | [DATA_NEEDED: supply voltage] | [DATA_NEEDED: supply voltage] | [DATA_NEEDED: supply voltage] | [DATA_NEEDED: supply voltage] |
| Interface | Dual muxed port parallel | Dual muxed port parallel | [DATA_NEEDED: interface] | [DATA_NEEDED: interface] | [DATA_NEEDED: interface] | [DATA_NEEDED: interface] |
| Architecture | TxDAC+ CMOS current-steering | TxDAC+ CMOS current-steering | TxDAC+ family | TxDAC+ family | TxDAC+ family | TxDAC+ family |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
Key Differentiators
- 300 MSPS update rate (vs AD9750ASTZ)
- Dual muxed port reduces FPGA clock pressure (vs AD9752ASTZ)
- 10-bit cost/performance optimization (vs AD9755ASTZ)
Design Notes
Operate the AD9751ASTZ within the 3 V to 3.6 V supply range. Use a low-inductance 0.1 uF ceramic capacitor near each VDD pin and a 10 uF bulk capacitor per supply plane. A clean analog supply and separate digital supply trace reduce clock feedthrough and improve SFDR. If the DAC shares a supply plane with FPGA logic, add an LC filter or ferrite bead on the analog supply branch.
Route the differential current outputs IOUTA/IOUTB as 50-ohm controlled impedance traces with matched lengths. For AC-coupled applications, use a balun or transformer with the correct impedance ratio and place the termination resistors close to the DAC output pins. Keep the update clock trace short and terminated to avoid reflections, and use a solid ground plane beneath the LQFP-48 package.
The 48-lead LQFP package has no exposed pad, so thermal relief relies on the lead frame and adjacent copper. At 300 MSPS continuous operation, power dissipation depends on output current, supply voltage, and digital switching. Provide additional copper pour on the attached signal layers and via stitching around the package to improve heat spreading if the DAC runs near maximum output current.
Use the dual muxed port interface at the correct clock ratio so the FPGA data bus does not need to run at 300 MHz. Keep the parallel data trace lengths matched and avoid vias unless necessary. Verify the setup and hold times in the AD9751 datasheet for your selected clock ratio, because marginal timing on the muxed data inputs can degrade spurious performance.
Compliance Information
Retrieved web data does not explicitly state RoHS, REACH, lead-free, or halogen-free status. The Z suffix in ADI part numbers often indicates lead-free finish, but this must be confirmed in the official AD9751 datasheet or ADI product documentation.
