Data Sheet
GENERAL DESCRIPTION
The
is an 18-bit, 8-channel, true differential,
simultaneous sampling analog-to-digital data acquisition
system (DAS). The part contains analog input clamp protection,
a second-order antialiasing filter, a track-and-hold amplifier, an
18-bit charge redistribution successive approximation analog-
to-digital converter (ADC), a flexible digital filter, a 2.5 V
reference and reference buffer, and high speed serial and
parallel interfaces.
AD7609
The
operates from a single 5 V supply and can
accommodate ±10 V and ±5 V true bipolar differential input
signals while sampling at throughput rates up to 200 kSPS for
all channels. The input clamp protection circuitry can tolerate
voltages up to ±16.5 V. The
has 1 MΩ analog input
impedance regardless of sampling frequency. The single supply
operation, on-chip filtering, and high input impedance elimi-
nate the need for driver op amps and external bipolar supplies.
The
antialiasing filter has a −3 dB cutoff frequency of
32 kHz and provides 40 dB antialias rejection when sampling
at 200 kSPS. The flexible digital filter is pin driven, yields
improvements in SNR, and reduces the −3 dB bandwidth.
Rev. A | Page 3 of 36
AD [ ANALOG DEVICES ]
