The AD7195BCPZ is a 8-channel Ultralow Noise 24-bit Sigma-Delta (Σ-Δ) ADC with PGA and AC excitation for high precision measurement applications. It contains a low noise, 24-bit Sigma-Delta (Σ-Δ) analogue to digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can interface directly to the ADC. The AD7195 contains AC excitation, which is used to remove DC-induced offsets from bridge sensors. The device can be configured to have two differential inputs or four pseudo differential inputs. The on-chip channel sequencer allows several channels to be enabled simultaneously and the AD7195 sequentially converts on each enabled channel, simplifying communication with the part. The on-chip 4.92MHz clock can be used as the clock source to the ADC or, alternatively, an external clock or crystal can be used. The output data rate from the part can be varied from 4.7Hz to 4.8kHz. The device has two digital filter options.
● AC or DC sensor excitation
● 5nV/°C Offset drift
● 1ppm/°C Gain drift
● Specified drift over time
● 2 Differential/4 pseudo differential input channels
● Automatic channel sequencer
● Programmable gain (1 to 128)
● Internal or external clock
● Simultaneous 50/60Hz rejection
●ESD sensitive device, take proper precaution while handling the device.
