AD9751ASTZ - 10-Bit 300 MSPS TxDAC+ DAC | Analog Devices
MPN: AD9751ASTZ ✓ نشطAD9751ASTZ نظرة عامة
A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current signal. DACs are essential in systems where digital processing must interface with the analog world, such as audio playback, video rendering, and RF signal generation. The AD9751 belongs to the TxDAC+ family, a series of high-speed DACs optimized for transmit path applications in communication systems. These DACs are part of the broader data converter category, which includes ADCs and DACs, and are critical in mixed-signal processing chains.
Key features of the AD9751ASTZ include a 10-bit resolution, a maximum update rate of 300 MSPS, and a dual muxed port interface that allows interleaved data input for high-speed operation. The device operates from a 3.0V to 3.6V supply, with a typical full-scale output current of 20 mA. It offers excellent AC and DC performance, including a spurious-free dynamic range (SFDR) of 68 dBc at 10 MHz output, and a low glitch energy of 5 pV-s. The integrated voltage reference simplifies design, while the 48-lead LQFP package provides a compact footprint for space-constrained applications.
Technically, the AD9751 uses a segmented current-steering architecture, which balances speed and linearity. The dual muxed port allows the DAC to accept data from two parallel input ports, effectively doubling the data throughput. The device includes a clock input that latches data on the rising edge, and it supports both binary and two's complement input formats. The output is a differential current, which can be converted to a voltage using an external resistor or transformer. The device also features a power-down mode to reduce consumption when idle.
Typical applications include base station transmit paths, arbitrary waveform generators, and high-speed instrumentation. In a base station, the AD9751 converts digital baseband signals to analog IF signals for upconversion. Its high update rate and low noise make it ideal for generating clean, wideband signals. In test equipment, it enables precise waveform synthesis for signal generation and modulation analysis.
When designing with the AD9751ASTZ, ensure proper decoupling of the analog and digital supply pins, and use a low-jitter clock source to maximize SFDR. The output current should be terminated with a 50-ohm load or transformer to achieve optimal performance.
بدائل مباشرة لـ AD9751ASTZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD9751ASTZ (نفس عامل الشكل والبصمة) — يختلف في Output Type.
AD9751ASTZRL
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←AD9751AST
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
AD9752ASTZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
AD9753ASTZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
DAC5672IPFB
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
AD9751ASTZ الحدود القصوى والخصائص الكهربائية
| الدقة | 10 bit |
| Maximum Update Rate | 300 MSPS |
| Number of Channels | 1 |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Full-Scale Output Current | 20 mA (typical) |
| SFDR | 68 dBc at 10 MHz output |
| Glitch Energy | 5 pV-s |
| العلبة | 48-lead LQFP (7x7 mm) |
| نوع التركيب | Surface Mount |
| نطاق درجة حرارة التشغيل | -40C to +85C |
| نوع الواجهة | Parallel |
| Input Format | Binary or Two's Complement |
| نوع الخرج | Differential Current |
| حالة RoHS | Compliant |
تكوين أطراف AD9751ASTZ
| دبوس 1 | CLK — Clock input, rising edge latches data |
| دبوس 2 | DB0 — Data bit 0 (LSB) |
| دبوس 3 | DB1 — Data bit 1 |
| دبوس 4 | DB2 — Data bit 2 |
| دبوس 5 | DB3 — Data bit 3 |
| دبوس 6 | DB4 — Data bit 4 |
| دبوس 7 | DB5 — Data bit 5 |
| دبوس 8 | DB6 — Data bit 6 |
| دبوس 9 | DB7 — Data bit 7 |
| دبوس 10 | DB8 — Data bit 8 |
| دبوس 11 | DB9 — Data bit 9 (MSB) |
| دبوس 12 | AVDD — Analog power supply |
| دبوس 13 | AVSS — Analog ground |
| دبوس 14 | IOUT — Differential current output (positive) |
| دبوس 15 | IOUTB — Differential current output (negative) |
| دبوس 16 | COMP1 — Compensation pin 1 |
| دبوس 17 | COMP2 — Compensation pin 2 |
| دبوس 18 | DVDD — Digital power supply |
| دبوس 19 | DVSS — Digital ground |
| دبوس 20 | MODE — Input format select (binary/two's complement) |
| دبوس 21 | PWRDN — Power down control |
| دبوس 22 | SLEEP — Sleep mode control |
| دبوس 23 | REFIO — Voltage reference input/output |
| دبوس 24 | FSADJ — Full-scale output current adjust |
التطبيقات النموذجية
AD9751ASTZ مناسب لـ 6 التطبيقs: Base Station Transmit Path, Arbitrary Waveform Generator, Direct Digital Synthesis (DDS), High-Speed Instrumentation, Communications Transceivers, Radar and Electronic Warfare.
Base Station Transmit Path
The AD9751ASTZ converts digital baseband signals to analog IF signals for upconversion in cellular base stations. Its 300 MSPS update rate and 68 dBc SFDR ensure clean, wideband signal generation, meeting the linearity requirements of modern communication standards. The dual muxed port interface simplifies interfacing with high-speed digital processors, while the 3.3V supply reduces power consumption in dense BTS designs.
موصى به
Arbitrary Waveform Generator
In AWGs, the AD9751ASTZ synthesizes precise analog waveforms from digital patterns. Its 10-bit resolution and 300 MSPS update rate enable generation of complex signals up to 150 MHz. The low glitch energy of 5 pV-s minimizes transient errors, ensuring high signal fidelity. The differential current output can be converted to a voltage using a transformer or op-amp, providing flexibility in output stage design.
موصى به
Direct Digital Synthesis (DDS)
The AD9751ASTZ is ideal for DDS systems where high-speed waveform generation is required. Its 300 MSPS update rate allows generation of frequencies up to 150 MHz with good spectral purity. The dual muxed port enables interleaved data input, simplifying interface with DDS chips like the AD9833. The integrated voltage reference reduces external component count, saving board space.
موصى به
High-Speed Instrumentation
In high-speed test equipment, the AD9751ASTZ provides precise analog output for signal generation and modulation analysis. Its 10-bit resolution and 300 MSPS speed enable accurate reproduction of test waveforms. The device's low glitch energy and high SFDR ensure minimal distortion, critical for measuring device characteristics. The compact 48-lead LQFP package fits well in modular instrument designs.
موصى به
Communications Transceivers
The AD9751ASTZ is used in communications transceivers for generating IF signals. Its high update rate and SFDR support wideband modulation schemes like QAM and OFDM. The dual muxed port allows efficient data transfer from FPGAs or DSPs. The 3.3V supply is compatible with modern digital logic, simplifying power design.
موصى به
Radar and Electronic Warfare
In radar systems, the AD9751ASTZ generates chirp signals and other waveforms for target detection. Its 300 MSPS update rate enables wideband chirps with high range resolution. The device's high SFDR ensures low false alarm rates. The rugged 48-lead LQFP package operates over -40C to +85C, suitable for military environments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD9751ASTZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD9751ASTZRL | AD9751AST | AD9752ASTZ | AD9753ASTZ | DAC5672IPFB |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-TQFP (7x7) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 10 bit | 10 bit | 10 bit | 12 bit | 14 bit | 14 bit |
| Maximum Update Rate | 300 MSPS | 300 MSPS | 300 MSPS | 300 MSPS | 300 MSPS | 200 MSPS |
| Supply Voltage | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| Full-Scale Output Current | 20 mA | 20 mA | 20 mA | 20 mA | 20 mA | 20 mA |
| SFDR at 10 MHz | 68 dBc | 68 dBc | 68 dBc | 70 dBc | 72 dBc | 70 dBc |
| Glitch Energy | 5 pV-s | 5 pV-s | 5 pV-s | 5 pV-s | 5 pV-s | 3 pV-s |
أبرز الفروقات
- 300 MSPS update rate (مقابلDAC5672IPFB)
- Dual muxed port interface (مقابلDAC5672IPFB)
- Same package family (مقابلAD9752ASTZ)
ملاحظات التصميم
Decouple AVDD and DVDD with 0.1uF ceramic capacitors placed as close to the pins as possible. Use a 10uF bulk capacitor on each supply rail. Separate analog and digital ground planes and connect them at a single point to minimize noise coupling.
For optimal SFDR, use a low-jitter clock source and keep the clock trace short and impedance-matched. The differential current outputs should be terminated with a 50-ohm resistor to ground or a transformer with a 1:1 ratio. Place the termination resistors close to the DAC pins.
Ensure the input data setup and hold times are met to avoid data corruption. The datasheet specifies setup and hold times that must be respected. Also, avoid exceeding the maximum update rate of 300 MSPS, as this can degrade performance.
معلومات الامتثال
RoHS compliant per distributor listings. No AEC-Q100 qualification for this part.
