8-bit A/D converter achieves best-in-class linearity at 250 MSPS

Analog Devices' new 8-bit analog-to-digital converter (ADC) achieves a
conversion rate of 250 MSPS while maintaining a
differential nonlinearity (DNL) of +/-0.25 LSB. This DNL is two times
better than competitive ICs with comparable sample rates. DNL is
critical in providing accurate displays of small input signals for
applications such as digital oscilloscopes and network analyzers. The
new device also is well-suited for applications that require high
sample rates and high bandwidth, such as point-to-point backhaul
radios and power amplifier (PA) digital pre-distortion subsystems in
cellular base stations.

The AD9480 offers legacy support for demultiplexed TTL/CMOS output
logic, as well as LVDS (low-voltage differential signaling) outputs,
to accommodate both existing and next-generation digital ASICs
(application-specific integrated circuits). In CMOS demultiplexed
mode, the new ADC moves data through two 8-bit channels at one-half
the clock rate in either interleaved or parallel mode. When operating
in LVDS mode, the AD9480 pipes data at the full clock rate through a
single output channel for maximum output performance.

In addition to easing design concerns through its support of LVDS
outputs, the 8-bit AD9480 ADC achieves a 46.4 dB SNR (signal-to-noise
ratio) and no missing codes. The AD9480 also guarantees +/-0.35 LSB
DNL over the entire industrial temperature range of -40 degrees C to
+85 degrees C. The converter operates from a 3.3-V power supply and
includes an internal reference and track-and-hold circuit. Featuring a
similar pin configuration to Analog Devices' AD9054A high-speed ADC,
the AD9480 lowers system development costs by allowing designers to
upgrade their products through a simple board modification.

Pricing and Availability
The AD9480 is sampling now in a 44-pin TQFP (thin quad flat pack) and
is priced at $24.20 per unit in 1,000-piece quantities.

For more
information, please visit

AD9480 data sheet

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