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.
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.
|Title||Content Type||File Type|
|AD7609: 8-Channel Differential DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC Data Sheet (Rev A, 02/2012) (pdf, 1737 kB)||Data Sheets|
|MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)||Technical Articles|
|Glossary of EE Terms||Glossary||HTML|
Recommended External 2.5V Voltage Reference for the AD7609
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