18-Bit, 1.25 MSPS PulSAR® ADC
AD7643
FEATURES APPLICATIONS
Medical instruments
High speed data acquisition/high dynamic data acquisition
Digital signal processing
Spectrum analysis
Instrumentation
Communications
ATE GENERAL DESCRIPTION
The AD7643 is an 18-bit, 1.25 MSPS, charge redistribution
SAR, fully differential, analog-to-digital converter (ADC) that
operates from a single 2.5 V power supply. The part contains a
high speed, 18-bit sampling ADC, an internal conversion clock,
an internal reference (and buffer), error correction circuits, and
both serial and parallel system interface ports. The part has no
latency and can be used in asynchronous rate applications. The
AD7643 is hardware factory calibrated and tested to ensure ac
parameters, such as signal-to-noise ratio (SNR), in addition to
the more traditional dc parameters of gain, offset, and linearity.
The AD7643 is only available in Pb-free packages with
operation specified from −40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM
TEMP REFBUFIN REF REFGND …