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).