AD7194 8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA

The AD7194 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 eight differential inputs or sixteen pseudo differential inputs. 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. For applications that require all conversions to be settled, the AD7194 includes zero latency.

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 housed in a 32-lead LFCSP package.

Applications
  • PLC/DCS analog input modules
  • Data acquisition
  • Strain gage transducers
  • Pressure measurement
  • Temperature measurement
  • Flow measurement
  • Weigh scales
  • Chromatography
  • Medical and scientific instrumentation
Features and Benefits
  • Fast settling filter option
  • 8 differential/16 pseudo differential input channels
  • RMS noise: 11 nV at 4.7 Hz (gain = 128)
  • 15.5 noise-free bits at 2.4 kHz (gain = 128)
  • Up to 22 noise-free bits (gain = 1)
  • Offset drift: ±5 nV/°C
  • Gain drift: ±1 ppm/°C
  • 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
  • See data sheet for additional features
Analog to Digital Converters
Design Tools
Data Sheets
Documentnote
AD7194: 8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA (Rev. A)PDF 996 kB
Application Notes
Documentnote
AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0)PDF 125 kB
AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195 (Rev. 0)PDF 118 kB
AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0)PDF 82 kB
User Guides
Documentnote
UG-224: Evaluation Board for the AD7194, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta (Σ-Δ) ADCPDF 775 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7194BCPZ Production32 ld LFCSP (5x5x.85mm) w/3.5exposed padOTH 490-40 to 105C8.26.4Y
AD7194BCPZ-REEL Production32 ld LFCSP (5x5x.85mm) w/3.5exposed padREEL 5000-40 to 105C06.4Y
AD7194BCPZ-REEL7 Production32 ld LFCSP (5x5x.85mm) w/3.5exposed padREEL 1500-40 to 105C06.4Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7194EBZEvaluation Board59Y
Reference Materials
AD7194: 8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA (Rev. A) ad7194
Download the Active Functional Model to evaluate and debug AD719x ad7190
AD7193/AD7194 Digital Filter Models ad7193
AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0) ad7190
AN-1131: AD7190、AD7192、AD7193、AD7194和AD7195的斩波 (Rev. 0) ad7190
AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195 (Rev. 0) ad7190
AN-1084: 通道切换:AD7190、AD7192、AD7193、AD7194、AD7195 (Rev. 0) ad7190
AN-1069: AD7190、AD7192、AD7193、AD7194和AD7195的零延迟模式 (Rev. 0) ad7190
AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0) ad7190
UG-224: Evaluation Board for the AD7194, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta (Σ-Δ) ADC ad7194
Tutorial on Technical and Performance Benefits of AD719x Family ad7190
Analog-to-Digital Converter and Drivers ICs Solutions Bulletin, Volume 10,... ad7986
MS-2210:高速ADC的电源设计 ad9861