ADI AD7193BRUZ

The AD7193 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit Σ-Δ ADC. The on-chip low noise gain stage means that signals can be directly interfaced to small signal inputs. The device can be configured as four differential inputs or eight pseudo differential inputs. An on-chip channel sequencer allows multiple channels to be enabled simultaneously; the AD7193 sequentially performs conversions on each enabled channel, simplifying communication with the device. The on-chip 4.92 MHz clock can be used as the clock source for the ADC; alternatively, an external clock or crystal can be used. The output data rate of the device can be varied from 4.7 Hz to 4.8 kHz. The device features a very flexible digital filter, including a fast settling option. Variables such as output data rate and settling time depend on the option selected. The AD7193 also includes a zero latency option. The device operates from a 3 V to 5.25 V power supply, consumes 4.65 mA, and is available in a 28-lead TSSOP package and a 32-lead LFCSP package.

• Fast filter settling options
• 4 differential / 8 pseudo-differential input channels
• RMS noise: 1 nV @ 4.7 Hz (G = 128)
• 15.5-bit noise-free resolution (2.4 kHz, G = 128)
• Noise-free resolution up to 22 bits (G = 7)
• Offset drift: ±5 nV/°C
• Gain drift: ±1 ppm/°C
• Stable time drift characteristics
• Automatic channel sequencer
• Programmable gain (1 to 128)
• Output data rate: 4.7 Hz to 4.8 kHz
• Internal or external clock
• Simultaneous 50 Hz/60 Hz rejection
• 4 general-purpose digital outputs
• Supply voltage AVDD: 3 V to 5.25 V, DVDD: 2.7 V to 5.25 V
• Current: 4.65 mA
• Temperature range: -40°C to +105°C
• 28-lead TSSOP and 32-lead LFCSP packages
• Interface: 3-wire serial interface SPI, QSPI, MICROWIRE, and DSP-compatible with Schmitt trigger on SCLK pin

• PLC/DCS analog input modules
• Data acquisition
• Strain gauge sensors
• Pressure measurement
• Temperature measurement
• Flow measurement
• Electronic scales
• Chromatographs
• Medical and scientific instruments