DAC38RF83 - Dual 14-Bit 9-GSPS RF-Sampling DAC | TI
MPN： DAC38RF83 ✓ 啟用中DAC38RF83 概覽
A digital-to-analog converter (DAC) converts digital binary data into an analog signal. As an RF-sampling DAC, the DAC38RF83 directly synthesizes signals at radio frequencies without an intermediate IF stage, simplifying transceiver architectures. It belongs to the family of high-speed data converters, essential in modern communication systems for bridging the digital and analog domains.
Key features include dual 14-bit DAC cores operating at up to 9 GSPS, a flexible interpolation factor from 6x to 24x, an integrated PLL for clock generation, and a JESD204B interface supporting high per-lane data rates. The device offers single-ended or differential output modes, high dynamic range, and programmable output power, enabling direct RF synthesis up to 4.5 GHz while reducing system complexity and component count.
The DAC38RF83 utilizes advanced CMOS technology and a high-speed current-steering architecture to achieve excellent spurious-free dynamic range (SFDR) and low noise spectral density. The on-chip PLL and clock multiplier reduce the need for external high-frequency clock sources, while the JESD204B serial interface simplifies PCB layout by minimizing data lines. Multiple operating modes, including real and complex output, plus digital gain and offset adjustment, provide design flexibility.
Typical applications include 3G/4G/5G wireless base stations, radar systems, software-defined radio (SDR), and broadband test equipment. The wideband synthesis capability and high dynamic range support complex modulation schemes such as OFDM and wideband spread-spectrum signals.
When designing with the DAC38RF83, careful attention must be paid to power supply decoupling and clock jitter, as these directly impact output signal quality. The device requires multiple supply rails (1.0V, 1.8V, 3.3V per family documentation; verify against the datasheet) and a clean reference clock, with controlled-impedance RF output traces.
直接替換替代品，適用於 DAC38RF83 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： DAC38RF83 （相同外形與佔位） — 差異在於 Architecture, Output Frequency Range.
DAC38RF83IAAVR
✅ 直接替換聯絡詢價
查看資料表 →DAC38RF82
✅ 直接替換📋 參考替代品（不在目錄中）
DAC38RF84
✅ 直接替換📋 參考替代品（不在目錄中）
DAC38RF81
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DAC38RF82IAAV
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DAC38RF83 最大額定值與電氣特性
| 解析度 | 14 bit |
| Number of Channels | 2 |
| Maximum Sampling Rate | 9 GS/s |
| Output Frequency Range | 0 to 4.5 GHz (RF synthesis) |
| Interpolation | 6x to 24x |
| On-Chip PLL | 6 GHz and 9 GHz |
| 介面 | JESD204B |
| Settling Time | 1 ns |
| Output Mode | Single-ended or differential |
| Architecture | Current-steering, CMOS |
| 封裝 | 144-FCBGA (10x10 mm) |
| 安裝類型 | Surface Mount |
DAC38RF83 腳位配置
| 腳位 [DATA_NEEDED] | DA/DB (DAC outputs) — Differential current outputs for channels A and B |
| 腳位 [DATA_NEEDED] | SERDATA/P ADSYNCP — JESD204B serial data and sync inputs |
| 腳位 [DATA_NEEDED] | SYSREFP/N — System reference for JESD204B latency alignment |
| 腳位 [DATA_NEEDED] | CLKP/CLKN — Reference clock inputs to on-chip PLL |
| 腳位 [DATA_NEEDED] | RESET/SRESET — Device reset |
| 腳位 [DATA_NEEDED] | AVDD/DVDD/PLL_VDD — Analog, digital, and PLL supply rails |
| 腳位 [DATA_NEEDED] | GND — Ground / exposed ball grid |
典型應用
DAC38RF83 適用於 6 應用s: 5G Wireless Base Stations, Radar and Electronic Warfare, Software-Defined Radio, Broadband Test and Measurement Equipment, Satellite Communications Uplink, Medical Imaging Ultrasound.
5G Wireless Base Stations
The DAC38RF83 fits 3G/4G/5G base station transmit chains by directly synthesizing wideband OFDM carriers from 0 to 4.5 GHz at up to 9 GSPS. Its 14-bit resolution and high dynamic range preserve EVM and ACLR for wideband modulation, while the JESD204B interface simplifies the digital front end. The on-chip 6/9 GHz PLL removes the need for a separate high-frequency clock synthesizer, reducing BOM cost. Placed after the baseband FPGA or SoC, it replaces multi-stage upconversion, lowering phase noise contribution and board area.
推薦
Radar and Electronic Warfare
Wideband radar waveform generation benefits directly from the DAC38RF83's 9-GSPS rate and 4.5 GHz synthesis bandwidth, enabling high-range-resolution LFM and stepped-frequency waveforms in a single converter. The 14-bit core and current-steering architecture deliver the spurious performance needed for target detection in cluttered spectrum. The JESD204B lane interface supports the sustained data throughput demanded by high-duty-cycle pulse trains, and the interpolating filter chain relaxes input data rate requirements on the FPGA.
推薦
Software-Defined Radio
In SDR transmit paths, the DAC38RF83 enables direct-RF architectures that eliminate mixer/IF stages, letting waveform flexibility live entirely in the digital domain. Real and complex output modes plus digital gain and offset adjustment allow adaptation across frequency plans without hardware change. The 6x-24x interpolation lets a lower-speed JESD204B link feed the 9-GSPS core, and the on-chip PLL accepts a modest reference clock, simplifying multi-band transceiver designs used in test, defense, and prototyping platforms.
推薦
Broadband Test and Measurement Equipment
AWGs, signal generators, and RF test exciters use the DAC38RF83 to generate signals up to 4.5 GHz with 14-bit amplitude accuracy and 1 ns settling. The high dynamic range supports low adjacent-channel spurs required in conducted and radiated testing. The JESD204B interface allows waveform download from a standard FPGA at high throughput, while dual channels enable differential stimulus or multi-tone test configurations. Settling time of 1 ns supports fast frequency hopping sequences in measurement routines.
推薦
Satellite Communications Uplink
Satcom ground terminals and payloads require wideband, spectrally clean carriers; the DAC38RF83 synthesizes Ku-sub-band IF/RF waveforms directly with 14-bit precision. The interpolating filters and on-chip PLL reduce clock-tree complexity in size- and power-constrained transponders, and the differential output mode drives modulator or mixer stages with common-mode noise rejection. High SFDR prevents interference into adjacent transponder channels, a critical regulatory and link-budget consideration for uplink chains.
推薦
Medical Imaging Ultrasound
High-end ultrasound transmitters use the DAC38RF83 to generate arbitrary excitation waveforms (coded pulses, chirps) that improve penetration and resolution versus fixed pulses. The 9-GSPS capability and 1 ns settling produce precise time-delay beamforming waveforms across channels, while the 14-bit core controls apodization amplitude accuracy. JESD204B data transport reduces cable count inside imaging heads and mainframes, and the on-chip PLL eases clocking synchronization between transmit and receive beamformer subsystems.
推薦
推薦產品摘要
工程參考資料，適用於 DAC38RF83 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DAC38RF83IAAVR | DAC38RF82 | DAC38RF84 | DAC38RF81 |
|---|---|---|---|---|---|
| Package | 144-FCBGA (10x10 mm) | 144-FCBGA (10x10 mm) - same | 144-FCBGA (10x10 mm) - same | 144-FCBGA (10x10 mm) - same | 144-FCBGA (10x10 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 9 GS/s | 9 GS/s | 9 GS/s | 9 GS/s | 9 GS/s |
| Interpolation | 6x to 24x | 6x to 24x | 6x to 24x | 6x to 24x | 6x to 24x |
| Interface | JESD204B | JESD204B | JESD204B | JESD204B | JESD204B |
| Output Frequency Range | 0 to 4.5 GHz | 0 to 4.5 GHz | 0 to 4.5 GHz | 0 to 4.5 GHz | 0 to 4.5 GHz |
主要差異化特點
- Dual-channel direct-RF synthesis to 4.5 GHz (對比DAC38RF81)
- Integrated 6 GHz and 9 GHz PLL (對比DAC38RF82)
- Settling time of 1 ns (對比Slower IF-sampling DAC families)
設計說明
Clock jitter directly limits RF output SNR: at 4.5 GHz output, even 100 fs RMS jitter degrades SNR materially. Use a low-noise reference source with the on-chip PLL in its lowest-jitter mode, and route the reference clock as a controlled-impedance differential pair with AC coupling per the TI DAC38RFxx datasheet clocking section.
The 144-FCBGA (10x10 mm) package requires careful ball-map breakout: maintain solid ground planes under the DAC balls, place supply decoupling capacitors on the opposite side of the board directly beneath the ball array, and keep the JESD204B lanes length-matched within the spec given in the datasheet. Use 50-ohm controlled impedance for the differential DAC outputs.
The device requires multiple supply rails; verify exact rail voltages and sequencing in the datasheet before layout. Decouple each rail with bulk plus high-frequency ceramics, and isolate the PLL supply from the switching DAC core supply to avoid spur pickup. Do not omit SYSREF routing - it is required for deterministic JESD204B latency.
合規資訊
[DATA_NEEDED: compliance statuses were not present in the verified web data; consult TI quality/environmental pages for DAC38RF83 packaging and compliance certificates.]
