AD7193BRUZ-REEL Data Converter IC ADC 4CH Ultra Low Noise 24Bit w/ PGA
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,da converter circuit
AD7193BRUZ-REEL Data Converter IC ADC 4CH Ultra Low Noise 24Bit w/ PGA
FEATURES
- Fast settling filter option
- 4 differential/8 pseudo differential input channels RMS noise: 11 nV @ 4.7 Hz (gain = 128)
- 15.5 noise-free bits @ 2.4 kHz (gain = 128)
- Up to 22 noise-free bits (gain = 1)
- Offset drift: ±5 nV/°C
- Gain drift: ±1 ppm/°C
- Specified drift over time
- 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
- Power supply
- 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
- SPI, QSPITM, MICROWIRETM, and DSP compatible Schmitt trigger on SCLK
APPLICATIONS
- PLC/DCS analog input modules Data acquisition
- Strain gage transducers
- AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AIN8
- AINCOM BPDSW
- 4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
- Pressure measurement Temperature measurement Flow measurement
- Weigh scales Chromatography
- Medical and scientific instrumentation
GENERAL DESCRIPTION
The AD7193 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can interface directly to the ADC.
The device can be configured to have four differential inputs or eight pseudo differential inputs. The on-chip channel sequencer allows several channels to be enabled simultaneously, and the AD7193 sequentially converts on each enabled channel, simplifying communication with the part. The on-chip 4.92 MHz 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 4.7 Hz to 4.8 kHz.
The device has a very flexible digital filter, including a fast settling option. Variables such as output data rate and settling time are dependent on the option selected. The AD7193 also includes a zero latency option.
The part operates with a power supply from 3 V to 5.25 V. It consumes a current of 4.65 mA, and it is available in a 28-lead TSSOP package and a 32-lead LFCSP package.
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