AD7609 Просмотр технического описания (PDF) - Analog Devices

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AD7609

8-Channel Differential DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC

Analog Devices 

Data Sheet

GENERAL DESCRIPTION

The AD7609 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 AD7609 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 AD7609 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 AD7609 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. B | Page 3 of 36

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