AD7170 12-Bit Low Power Σ−Δ ADC

The AD7170 is a very low power 12-bit analog-to-digital converter (ADC). It contains a precision 12-bit sigma-delta (Σ-Δ) ADC and an on-chip oscillator. Consuming only 135 μA, the AD7170 is particularly suitable for portable or battery operated products where very low power is a requirement. The AD7170 also has a power-down mode in which the device consumes 5 μA, thus increasing the battery life of the product.

For ease-of-use, all the features of the AD7170 are controlled by dedicated pins. Each time a data read occurs, eight status bits are appended to the 12-bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer. The output data rate of the AD7170 is 125 Hz, whereas the settling time is 24 ms. The AD7170 has one differential input and a gain of 1. This is useful in applications where the user needs to use an external amplifier to implement system-specific filtering or gain requirements.

The AD7170 operates with a power supply from 2.7 V to 5.25 V. It is available in a 10-lead LFCSP package.

The AD7171 is a 16-bit version of the AD7170. It has the same feature set as the AD7170 and is pin-for-pin compatible.

INTERFACE
  • 2-wire serial (read-only device)
  • SPI compatible
  • Schmitt trigger on SCLK
APPLICATIONS
  • Pressure measurement
  • Industrial process control
  • Portable instrumentation
Features and Benefits
  • Output data rate: 125 Hz
  • Pin-programmable power-down and reset
  • Status function
  • Internal clock oscillator
  • Current: 135 μA
  • Power supply: 2.7 V to 5.25 V
  • –40°C to +105°C temperature range
  • Package: 10-lead 3 mm x 3 mm LFCSP
Analog to Digital Converters
Reference Designs
Data Sheets
Documentnote
AD7170: 12-Bit Low Power Sigma-Delta ADC Data Sheet (Rev. B)PDF 264 kB
User Guides
Documentnote
UG-080: Evaluation Board for the AD7170 12-Bit, Low Power Sigma-Delta ADCPDF 554 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7170BCPZ-500RL7 Production10 ld LFCSP (3x3mm)OTH 500-40 to 105C00.95Y
AD7170BCPZ-REEL7 Production10 ld LFCSP (3x3mm)REEL 1500-40 to 105C00.95Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7170EBZEvaluation Board59Y
Reference Materials
AD7170: 12-Bit Low Power Sigma-Delta ADC Data Sheet (Rev. B) ad7170
AD7170: 12位低功耗∑-△型ADC (Rev. A) ad7170
CN0240 设计和集成文件 ad8475
UG-080: Evaluation Board for the AD7170 12-Bit, Low Power Sigma-Delta ADC ad7170
CN0240: 具有270 V共模抑制性能的双向隔离式高端电流检测模块 ad8475
MS-2210:高速ADC的电源设计 ad9861