1 Features
• Dual channel
• 14-bit 125 MSPS ADC
• Noise floor: –153 dBFS/Hz
• Ultra-low power with optimized power scaling:
82 mW/ch (125 MSPS)
• Latency: 1 clock cycle
• 14-Bit, no missing codes
• INL: ±1.5 LSB; DNL: ±0.5 LSB
• Reference: external or internal
• Industrial temperature range: –40°C to +105°C
• On-chip digital filter (optional)
– Decimation by 2, 4, 8, 16, 32
– 32-bit NCO
• DDR and Serial CMOS interface
• Small footprint: 40-WQFN (5 mm × 5 mm) package
• Single 1.8-V supply
• Spectral performance (fIN = 5 MHz):
– SNR: 74.0 dBFS
– SFDR: 90-dBc HD2, HD3
– SFDR: 100-dBFS worst spur
• Spectral performance (fIN = 70 MHz):
– SNR: 72.5 dBFS
– SFDR: 70-dBc HD2, HD3
– SFDR: 85-dBFS worst spur

2 Applications
• High-speed data acquisition
• Industrial monitoring
• Thermal imaging
• Imaging and sonar
• Software defined radio
• Power quality
• Communications infrastructure
• High-speed control loops
• Instrumentation
• Smart grids
• Spectroscopy
• Radar

3 Description
The ADC3644 device is a low-noise, ultra-low power,
14-bit, 125-MSPS dual-channel, high-speed analogto-
digital converter (ADC). Designed for low power
consumption, the device delivers a noise spectral
density of –153 dBFS/Hz, combined with very good
linearity and dynamic range. The ADC3644 offers IF
sampling support, which make the device an excellent
choice for a wide range of applications. High-speed
control loops benefit from the short latency of only one
clock cycle. The ADC consumes only 82 mW/ch at
125 MSPS, and power consumption scales well with
lower sampling rates.
The ADC3644 use a DDR or a serial CMOS interface
to output the data offering lowest power digital
interface, together with flexibility to minimize the
number of digital interconnects. These devices are
a pin-to-pin compatible family with different speed
grades. These devices support the extended industrial
temperature range of –40 to 105⁰C.