1 Features

• Dual channel ADC

• 18-bit 10, 25, 65 MSPS ADC

• Noise floor: -160 dBFS/Hz

• Low power and optimized power scaling:

53 mW/ch (10 MSPS) to 94 mW/ch (65 MSPS)

• Latency: 1-2 clock cycles

• 18-bit, no missing codes

• INL/DNL: ±7/ ±0.7 LSB (typical)

• Reference: external or internal

• Input bandwidth: 900 MHz (3-dB)

• Industrial temperature range: -40 to +105°C

• On-chip digital filter (optional)

– Decimation by 2, 4, 8, 16, 32

– 32-bit NCO

• Serial LVDS digital interface (2-, 1- and 1/2-wire)

• Small footprint: 40-QFN (5x5 mm) package

• Spectral performance (fIN = 5 MHz):

– SNR: 83.8 dBFS

– SFDR: 89 dBc HD2, HD3

– SFDR: 101 dBFS Worst spur

• Spectral performance (fIN = 20 MHz):

– SNR: 82.6 dBFS

– SFDR: 85 dBc HD2, HD3

– SFDR: 97 dBFS Worst spur

2 Applications

• High-speed data acquisition

• Industrial monitoring

• Software defined radio

• Power quality analyzer

• Source measurement unit (SMU)

• Communications infrastructure

• Spectrum analyzer

• Control loops

• Instrumentation

• Imaging

• Spectroscopy

• Radar

3 Description

The ADC3681, 82, 83 (ADC368x) is a low noise, ultralow

power 18-bit 65 MSPS high-speed dual channel

ADC family. Designed for lowest noise performance,

it delivers a noise spectral density of -160 dBFS/Hz

combined with excellent linearity and dynamic range.

The ADC368x offers excellent DC precision together

with IF sampling support which makes it suited for a

wide range of applications. High-speed control loops

benefit from the short latency as low as only 1 clock

cycle. The ADC consumes only 94 mW/ch at 65 Msps

and its power consumption scales well with lower

sampling rates.

The ADC368x uses a serial LVDS (SLVDS) interface

to output the data which minimizes the number of

digital interconnects. The device supports two-lane,

one-lane and half-lane options. The ADC36xx is a

pin to pin compatible family of ADCs with 16 and

18-bit resolution and different speed grades. It comes

in a 40-pin QFN package (5 x 5mm) and supports

the extended industrial temperature range from -40 to

+105⁰C.