ADC3908Dx and ADC3908Sx 8-bit, 25 to 125MSPS Low Latency, Low Power, Small,

Single and Dual Channel ADC with Integrated Input Buffers

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. High-

speed 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 pin-

to-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.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

ADC3908D025,

'D065, 'D125

ADC3908S025,'S06

5, 'S125

VQFN (32)

4mm × 4mm

(1)

For more information, see Section 11.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

Device Information

PART NUMBER

(c= #CH; sss= MSPS)

RESOLUTION

SAMPLING RATE

MSPS

ADC3910csss

10-Bit

25, 65, 125

ADC3908csss

8-Bit

25, 65, 125

REF

ADC

ADC

Parallel

Interface

Control

Interface

RESET

AVDD

IOVDD

CLK

GND

M2

M1

M0

INAP

INAM

INBP

INBM

VCM

DCLK

DCLK

#8 DOUT

PDN

Block Diagram

ADC3908D025, ADC3908D065, ADC3908D125

ADC3908S025, ADC3908S065, ADC3908S125

SBASAU9 – OCTOBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.