NSC ADC12EU050CILQ, ADC12EU050 Datasheet

ADVANCE INFORMATION

January 25, 2008

ADC12EU050
Ultra-Low Power, Octal, 12-bit, 40-50 MSPS Analog-to­Digital Converter

General Description

NOTE: This is Advance Information for a product cur­rently in development. ALL specifications are design tar­gets and are subject to change.

The ADC12EU050 is a 12-bit, ultra-low power, octal A/D con­verter for use in high performance analog to digital applica­tions. The ADC12EU050 uses an innovative continuous time
sigma delta architecture offering ultra low power consumption
and an alias free sample bandwidth up to 25MHz. The input
stage of each channel features a proprietary system to ensure
instantaneous recovery from overdrive. Instant overload re­covery (IOR) with no memory effect guarantees the elimina­tion of phase errors resulting from out of range input signals.
The ADC12EU050 reduces interconnection complexity by us­ing programmable serialized outputs which offer the industry
standard LVDS and SLVS modes. Power consumption of only
44mW per channel(@ 50MSPS) gives a total chip power con­sumption of 350mW. The ADC12EU050 can operate entirely
from a 1.2V supply, although a separate output driver supply
of up to 1.8V can be used. The device operates from -40 to
+85 °C and is supplied in a 10 x 10 mm2, 68 pin package.

Features

■

CT∑ΔADC architecture with 40-50MSPS throughput

■

Anti-alias filter free Nyquist sample range

■

Unique Instant Overload Recovery (IOR)

■

Wide 2.10 VPP input range

■

1.2V supply voltage

■

Integrated precision LC PLL

■

Serial control via SPI compatible interface

Key Specifications

■

Resolution 12 Bits

■

Conversion Rate 40 to 50 MSPS

■

SNR 70 dBFS (typ) @ (fIN = 3.5MHz)

■

THD –70 dB (typ) @ (fIN = 3.5MHz)

■

Power Consumption 44 mW/ch (typ) @ 50MSPS

■

40 mW/ch (typ) @ 40MSPS

■

Total Active Power
Consumption

350 mW (typ) @ 50MSPS

(Equalizer off)

■

Inter-Channel Isolation >110 dB @ (fIN = 3.5MHz)

■

Operating Temp. Range -40 to +85 °C

Applications

■

Battery powered portable systems

■

Medical imaging, ultrasound

■

Industrial ultrasound, such as non-destructive testing

■

Communications

© 2008 National Semiconductor Corporation 300511 www.national.com

ADC12EU050 Ultra-Low Power, Octal, 12-bit, 40-50 MSPS Analog-to-Digital Converter

Block Diagram

30051102

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ADC12EU050

Connection Diagram

30051101

Ordering Information

Industrial (−40°C ≤ TA ≤ +85°C)

Package

ADC12EU050CILQ 68 Pin LLP

Note:

The ADC12EU050 evaluation systems comprise a fully populated &
tested device board (DUT), a data capture card with USB 2.0 inter­face, a SPI control daughter board, Merlin® time and frequency

domain measurement software and 2 USB connection cables. The
ADC12EU050 evaluation kit is not compatible with National
Semiconductor’s Wavevision capture board and software.

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ADC12EU050