Datasheet AD7171 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 16-Bit, Low Power, Sigma-Delta ADC |
| Pages / Page | 17 / 1 — 16-Bit, Low Power, Sigma-Delta ADC. Data Sheet. AD7171. FEATURES. … |
| Revision | C |
| File Format / Size | PDF / 315 Kb |
| Document Language | English |
16-Bit, Low Power, Sigma-Delta ADC. Data Sheet. AD7171. FEATURES. FUNCTIONAL BLOCK DIAGRAM. Output data rate: 125 Hz. GND VDD
Model Line for this Datasheet
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16-Bit, Low Power, Sigma-Delta ADC Data Sheet AD7171 FEATURES FUNCTIONAL BLOCK DIAGRAM Output data rate: 125 Hz GND VDD REFIN(+) REFIN(–) Pin-programmable power-down and reset Status function AIN(+) 16-BIT Σ-Δ DOUT/RDY Internal clock oscillator ADC AIN(–) SCLK Current: 135 µA PDRST Power supply: 2.7 V to 5.25 V AD7171 INTERNAL CLOCK
001
−40°C to +105°C temperature range
08417-
Package: 10-lead 3 mm × 3 mm LFCSP
Figure 1.
INTERFACE Table 1. 2-wire serial (read-only device) VREF = VDD RMS Noise P-P Noise P-P Resolution ENOB SPI compatible
5 V 11.5 µV 76 µV 16 bits 16 bits
Schmitt trigger on SCLK
3 V 6.9 µV 45 µV 16 bits 16 bits
APPLICATIONS Weigh scales Pressure measurement Industrial process control Portable instrumentation GENERAL DESCRIPTION
The AD7171 is a very low power, 16-bit, analog-to-digital The output data rate of the AD7171 is 125 Hz, whereas the settling converter (ADC). It contains a precision, 16-bit, Σ-Δ ADC and time is 24 ms. The AD7171 has one differential input and a gain an on-chip oscillator. Consuming only 135 µA, the AD7171 is of 1. This is useful in applications where the user needs to use an particularly suitable for portable or battery operated products external amplifier to implement system-specific filtering or gain where very low power is a requirement. The AD7171 also has a requirements. power-down mode in which the device consumes 5 μA, thus The AD7171 operates with a power supply from 2.7 V to 5.25 V. increasing the battery life of the product. It is available in a 10-lead LFCSP. For ease of use, dedicated pins control all of the features of the The AD7170 is a 12-bit version of the AD7171. It has the same AD7171. Each time a data read occurs, eight status bits are feature set as the AD7171 and is pin-for-pin compatible. appended to the 16-bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer.
Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2009–2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES INTERFACE APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT NOISE AND RESOLUTION SPECIFICATIONS ADC CIRCUIT INFORMATION OVERVIEW FILTER, DATA RATE, AND SETTLING TIME GAIN POWER-DOWN/RESET (PDRST\) ANALOG INPUT CHANNEL BIPOLAR CONFIGURATION DATA OUTPUT CODING REFERENCE DIGITAL INTERFACE GROUNDING AND LAYOUT APPLICATIONS INFORMATION TEMPERATURE SYSTEM SIGNAL CONDITIONING CIRCUIT OUTLINE DIMENSIONS ORDERING GUIDE
001
−40°C to +105°C temperature range
08417-
Package: 10-lead 3 mm × 3 mm LFCSP
Figure 1.
INTERFACE Table 1. 2-wire serial (read-only device) VREF = VDD RMS Noise P-P Noise P-P Resolution ENOB SPI compatible
5 V 11.5 µV 76 µV 16 bits 16 bits
Schmitt trigger on SCLK
3 V 6.9 µV 45 µV 16 bits 16 bits
APPLICATIONS Weigh scales Pressure measurement Industrial process control Portable instrumentation GENERAL DESCRIPTION
The AD7171 is a very low power, 16-bit, analog-to-digital The output data rate of the AD7171 is 125 Hz, whereas the settling converter (ADC). It contains a precision, 16-bit, Σ-Δ ADC and time is 24 ms. The AD7171 has one differential input and a gain an on-chip oscillator. Consuming only 135 µA, the AD7171 is of 1. This is useful in applications where the user needs to use an particularly suitable for portable or battery operated products external amplifier to implement system-specific filtering or gain where very low power is a requirement. The AD7171 also has a requirements. power-down mode in which the device consumes 5 μA, thus The AD7171 operates with a power supply from 2.7 V to 5.25 V. increasing the battery life of the product. It is available in a 10-lead LFCSP. For ease of use, dedicated pins control all of the features of the The AD7170 is a 12-bit version of the AD7171. It has the same AD7171. Each time a data read occurs, eight status bits are feature set as the AD7171 and is pin-for-pin compatible. appended to the 16-bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer.
Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2009–2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES INTERFACE APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT NOISE AND RESOLUTION SPECIFICATIONS ADC CIRCUIT INFORMATION OVERVIEW FILTER, DATA RATE, AND SETTLING TIME GAIN POWER-DOWN/RESET (PDRST\) ANALOG INPUT CHANNEL BIPOLAR CONFIGURATION DATA OUTPUT CODING REFERENCE DIGITAL INTERFACE GROUNDING AND LAYOUT APPLICATIONS INFORMATION TEMPERATURE SYSTEM SIGNAL CONDITIONING CIRCUIT OUTLINE DIMENSIONS ORDERING GUIDE
