The DAC38RFxx is a family of high-performance, dual/single-channel, 14-bit, 9-GSPS, RF-sampling digital-to-analog converters (DACs) that are capable of synthesizing wideband signals from 0 to 4.5 GHz. A high dynamic range allows the DAC38RFxx family to generate 3G/4G signals for wireless basestations with an output frequency up to 4 GHz.
The devices feature a low-power JESD204B Interface with up to 8 lanes, and provides a maximum bit rate of 12.5 Gbps and input sample rate of 1.23 GSPS complex per channel. The DAC38RFxx provides two digital upconverters per DAC, with multiple interpolation rates and a digital quadrature modulator with independent, frequency flexible NCOs. An optional low-jitter PLL/VCO simplifies the DAC clock generation by allowing use of a lower frequency reference clock.
14-Bit Resolution
Maximum DAC Sample Rate: 9 GSPS
Key Specifications:
RF Full Scale Output Power at 2.1 GHz:
DAC38RF80/90/84: 2 dBm
DAC38RF83/93/85: 4 dBm (with 2:1 balun)
Spectral Performance:
fDAC = 5898.24 MSPS, fOUT = 2.14 GHz
WCDMA ACLR: 74 dBc
WCDMA alt-ACLR: 80 dBc
fDAC = 8847.36 MSPS, fOUT = 3.7 GHz
20 MHz LTE ACLR: 66 dBc
fDAC = 9 GSPS, fOUT = 1.8 GHz, –6 dBFS
IMD3 = 70 dBc
NSD = –154 dBc/Hz
Dual-Band Digital Upconverter per DAC
Max Input Rate: 1 Band: 1250 MSPS Complex, 2 bands: 625 MSPS Complex Each
6, 8, 10, 12, 16, 18, 20 or 24x Interpolation
4 Independent NCOs with 48-Bit Resolution
JESD204B Interface
Subclass 1 Support for Multi-chip Synchronization
Maximum Lane Rate: 12.5 Gbps
Single-Ended Output with Integrated Balun (DAC38RF80/90/84) Covering 700–3800 MHz
