ADC12EU050_0811 Datasheet, PDF (1/48 Pages) National Semiconductor (TI) – Ultra-Low Power, Octal, 12-bit, 40-50 MSPS Sigma-Delta Analog-to-Digital Converter

November 6, 2008
ADC12EU050
Ultra-Low Power, Octal, 12-bit, 40-50 MSPS Sigma-Delta
Analog-to-Digital Converter
General Description
The ADC12EU050 is a 12-bit, ultra-low power, octal A/D con-
verter for use in high performance analog to digital applica-
tions. 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 re-
covery (IOR) with no memory effect guarantees the elimina-
tion of phase errors resulting from out of range input signals.
The ADC12EU050 reduces interconnection complexity by us-
ing programmable serialized outputs which offer the industry
standard LVDS and SLVS modes. Power consumption of only
48mW per channel @ 50MSPS gives a total chip power con-
sumption of 384mW. 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∑Δ ADC architecture with 40-50MSPS throughput}
■ ^{Anti-alias filter free Nyquist sample range}
■ ^{Unique Instant Overload Recovery (IOR)}
■ ^{Wide 2.10 V}_PP ^{input range}
■ ^{1.2V supply voltage}
■ ^{Integrated precision LC PLL}
■ ^{Serial control via SPI compatible interface}
Key Specifications
■ ^Resolution
■ ^{Conversion Rate}
■ ^SNR
■ ^THD
■ ^{Per Channel Power}
■ ^{Total Active Power}
■ ^{Inter-Channel Isolation}
■ ^{Operating Temp. Range}
12 Bits
40 to 50 MSPS
69.3 dBFS (typ) @ 50 MSPS
f_IN = 4.4MHz
–76.6 dB (typ) @ 50 MSPS
f_IN = 4.4MHz
48 mW/ch (typ) @ 50MSPS
385 mW (typ) @ 50MSPS
>110 dB @ f_IN = 4.4MHz
-40 to +85 °C
Applications
■ ^{Medical imaging, ultrasound}
■ ^{Industrial ultrasound, such as non-destructive testing}
■ ^{Communications}
■ ^{Battery powered portable systems}
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