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.