Analog Devices Inc.AD7606C-18 8-Channel DAS is an 18-bit, simultaneous sampling, analog-to-digital data acquisition system (DAS) with eight channels. Each channel has analog input clamp protection, a programmable gain amplifier (PGA), a low-pass filter (LPF). The AD7606C also has an 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). The AD7606C-18 contains a flexible digital filter, a low drift, 2.5V precision reference, a reference buffer to drive the ADC, and flexible parallel and serial interfaces.

FEATURES 18-bit ADC with 1MSPS on all channels Input buffer with 1MΩ minimum analog input impedance (RIN) Single 5V analog supply and 1.71V to 5.25V VDRIVE Per-channel selectable analog input ranges
Bipolar single-ended: ±12.5V, ±10V, ±6.25V, ±5V, ±2.5V Unipolar single-ended: 0V to 12.5V, 0V to 10V, 0V to 5V Bipolar differential: ±20V, ±12.5V, ±10V, ±5V Two bandwidth options: 25kHz and 220kHz, per channel Flexible digital filter, oversampling ratio up to 256 −40°C to +125°C operating range ±21V input clamp protection with 6kV ESD Pin to pin compatible to the AD7606B, AD7608, and AD7609 Performance 93dB SNR 102dB SNR, oversampling by 32 −100dB THD TUE = 0.05% of FSR maximum, external reference ±1 ppm/°C positive and negative FS error drift ±3 ppm/°C reference temperature coefficient APPLICATIONS Power line monitoring Protective relays Multiphase motor control Instrumentation and control systems Data acquisition systems FUNCTIONAL BLOCK DIAGRAM