1 Features

? Sampling rate up to 125MSPS

? Latency: 1 clock cycle

? Low power (2 channel):

– 90mW at 125MSPS

– 56mW at 25MSPS

– 3mW in PD mode

? Small footprint: 32-VQFN (4mm x 4mm)

? Single or dual channel ADC

? Internal reference

? No missing codes, ±0.25 LSB INL

? Buffered, differential or single ended inputs

? Input bandwidth: 150MHz (3dB)

? Single 1.8V supply

– Optional 3.3VIO capability

? Industrial temperature range: -40°C to 105°C

? Parallel (SDR, DDR) CMOS interface

? Spectral performance (FSCLK = 125MSPS, fIN = 5

MHz):

– SNR: 49.8dBFS

– SFDR: 60dBFS

2 Applications

? Low latency control loops

? Laser scanners

? Displacement sensors

? Detection equipment

3 Description

The ADC3908Dx and ADC3908Sx are a family

of ultra-low power 8-bit 125MSPS high-speed dual

and single channel analog-to-digital converters. Highspeed

control loops benefit from the short latency of

only 1 clock cycle. The ADC consumes only 90mW at

125MSPS with a power consumption that scales with

lower sampling rates.

The ADC3908Dx and ADC3908Sx uses parallel DDR

or SDR CMOS interface to output the data, and can

be driven at +1.8V or +3.3V to accommodate various

receiver requirements. The analog input and output

interface can be easily configured via pin control

(Interface Configuration Table). The device is a pinto-

pin compatible family of ADCs with 8 and 10-bit

resolution and different speed grades. The device is

available in a 32-pin VQFN package, and supports

industrial temperature range from -40 to +105°C.