1 Features
1• 14-Bit, 3-GSPS ADC
• Noise Floor: –155 dBFS/Hz
• RF Input Supports Up To 4.0 GHz
• Aperture Jitter: 90 fS
• Spectral Performance (fIN = 900 MHz, –2 dBFS):
– SNR: 61.4 dBFS
– SFDR: 71-dBc HD2, HD3
– SFDR: 76-dBc Worst Spur
• Spectral Performance (fIN = 1.85 GHz, –2 dBFS):
– SNR: 58.5 dBFS
– SFDR: 65-dBc HD2, HD3
– SFDR: 75-dBc Worst Spur
• On-Chip Digital Down-Converters:
– Up to 2 DDCs (Dual-Band Mode)
– Up to 3 Independent NCOs per DDC
• On-Chip Input Clamp for Overvoltage Protection
• Programmable On-Chip Power Detectors With
Alarm Pins for AGC Support
• On-Chip Dither
• On-Chip Input Termination
• Input Full-Scale: 1.35 VPP
• Support for Multi-Chip Synchronization
• JESD204B Interface:
– Subclass 1-Based Deterministic Latency
– 4 Lanes Support at 12.5 Gbps
• Total Power Dissipation: 3.2 W at 3.0 GSPS
• 72-Pin VQFN Package (10 mm × 10 mm)

2 Applications
• Multi-Carrier GSM Cellular Infrastructure Base
Stations
• Telecommunications Receivers
• DPD Observation Receivers
• Backhaul Receivers
• RF Repeaters and Distributed Antenna Systems

3 Description
The ADC31RF80 device is a 14-bit, 3-GSPS, singlechannel
telecom receiver and feedback device that
supports RF sampling with input frequencies up to
GHz and beyond. Designed for high signal-to-noise
ratio (SNR), the ADC31RF80 delivers a noise
spectral density of –155 dBFS/Hz as well as dynamic
range over a large input frequency range. The
buffered analog input with on-chip termination
provides uniform input impedance across a wide
frequency range and minimizes sample-and-hold
glitch energy.
The ADC31RF80 comes with a dual-band, digital
down-converter (DDC) with up to three independent,
16-bit numerically-controlled oscillators (NCOs) per
DDC for phase-coherent frequency hopping.
Additionally, the ADC is equipped with front-end peak
and RMS power detectors and alarm functions to
support external automatic gain control (AGC)
algorithms.
The ADC31RF80 supports the JESD204B serial
interface with subclass 1-based deterministic latency
using data rates up to 12.5 Gbps with up to four
lanes. The device is offered in a 72-pin VQFN
package (10 mm × 10 mm) and supports the
industrial temperature range (–40°C to +85°C).