Datasheet AD7981 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | High Temperature, 16-Bit, 600 kSPS PulSAR ADC |
| Pages / Page | 26 / 1 — High Temperature, 16-Bit,. 600 kSPS PulSAR ADC. Data Sheet. AD7981. … |
| Revision | B |
| File Format / Size | PDF / 2.1 Mb |
| Document Language | English |
High Temperature, 16-Bit,. 600 kSPS PulSAR ADC. Data Sheet. AD7981. FEATURES. TYPICAL APPLICATION CIRCUIT
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High Temperature, 16-Bit, 600 kSPS PulSAR ADC Data Sheet AD7981 FEATURES TYPICAL APPLICATION CIRCUIT Extreme high temperature operation 2.5V to 5.0V 2.5V Specified temperature range −55°C to +210°C (10-lead FLATPACK) −55°C to +175°C (10-Lead MSOP) REF VDD VIO 1.8V TO 5.0V High performance 0V TO VREF SDI IN+ 16-bit resolution with no missing codes AD7981 SCK 3- OR 4-WIRE INTERFACE IN– SDO (SPI, DAISY CHAIN, CS) 600 kSPS throughput with no latency/pipeline delay GND CNV
001
SNR: 91 dB typical at 1 kHz input frequency
12479-
THD: −102 dB typical at 1 kHz input frequency
Figure 1.
INL: ±2.5 LSB maximum, DNL: ±0.9 LSB maximum Low power 2.25 mW typical at 600 kSPS (VDD only) 4.65 mW typical at 600 kSPS (total) 75 µW typical at 10 kSPS Small footprint 10-lead, 3 mm × 3 mm, monometallic wire bonding MSOP 10-lead, 0.255 mm × 0.255 mm, monometallic wire bonding FLATPACK Pseudo differential analog input range 0 V to VREF with VREF between 2.4 V and 5.1 V Single-supply 2.5 V operation with 1.8 V to 5 V logic interface SPI-/QSPI-/MICROWIRE-/DSP-compatible digital interface Daisy-chain multiple ADCs and busy indicator APPLICATIONS Downhole drilling and instrumentation Avionics Heavy industrial High temperature environments GENERAL DESCRIPTION
3-wire bus and provides an optional busy indicator. It is compatible The AD79811 is a 16-bit, successive approximation, PulSAR® with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply, VIO. analog-to-digital converter (ADC) designed for high temperature For space constrained applications, the AD7981 is available in a operation. The AD7981 is capable of sample rates of up to 600 kSPS 10-lead mini small outline package (MSOP) with operation speci- while maintaining low power consumption from a single power fied from −55°C to +175°C and 10-lead ceramic flat package supply, VDD. It is a fast throughput, high accuracy, high tempera- (FLATPACK) with operation specified from −55°C to +210°C. ture, successive approximation register (SAR) ADC, packaged in a These packages are designed for robustness at extreme tempera- small form factor with a versatile serial port interface (SPI). tures, including monometallic wire bonding, and are qualified On the CNV rising edge, the AD7981 samples an analog input, for up to 1000 hours of operation at the maximum temperature IN+, between 0 V and REF with respect to a ground sense, IN−. rating. The reference voltage, REF, is applied external y and can be set The AD7981 is a member of a growing series of high temperature independent of the supply voltage, VDD. The device power qualified products offered by Analog Devices, Inc. For a complete scales linearly with throughput. selection of available high temperature products, see the high The SPI-compatible serial interface also features the ability, temperature product list and qualification data available at using the SDI input, to daisy-chain several ADCs on a single, www.analog.com/hightemp. 1 Protected by U.S. Patent 6,703,961.
Rev. B 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 ©2014–2017 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 APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE \CS MODE, 3-WIRE WITHOUT A BUSY INDICATOR \CS MODE, 3-WIRE WITH A BUSY INDICATOR \CS MODE, 4-WIRE WITHOUT A BUSY INDICATOR \CS MODE, 4-WIRE WITH A BUSY INDICATOR CHAIN MODE WITHOUT A BUSY INDICATOR CHAIN MODE WITH A BUSY INDICATOR APPLICATIONS INFORMATION PRINTED CIRCUIT BOARD (PCB) LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE
001
SNR: 91 dB typical at 1 kHz input frequency
12479-
THD: −102 dB typical at 1 kHz input frequency
Figure 1.
INL: ±2.5 LSB maximum, DNL: ±0.9 LSB maximum Low power 2.25 mW typical at 600 kSPS (VDD only) 4.65 mW typical at 600 kSPS (total) 75 µW typical at 10 kSPS Small footprint 10-lead, 3 mm × 3 mm, monometallic wire bonding MSOP 10-lead, 0.255 mm × 0.255 mm, monometallic wire bonding FLATPACK Pseudo differential analog input range 0 V to VREF with VREF between 2.4 V and 5.1 V Single-supply 2.5 V operation with 1.8 V to 5 V logic interface SPI-/QSPI-/MICROWIRE-/DSP-compatible digital interface Daisy-chain multiple ADCs and busy indicator APPLICATIONS Downhole drilling and instrumentation Avionics Heavy industrial High temperature environments GENERAL DESCRIPTION
3-wire bus and provides an optional busy indicator. It is compatible The AD79811 is a 16-bit, successive approximation, PulSAR® with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply, VIO. analog-to-digital converter (ADC) designed for high temperature For space constrained applications, the AD7981 is available in a operation. The AD7981 is capable of sample rates of up to 600 kSPS 10-lead mini small outline package (MSOP) with operation speci- while maintaining low power consumption from a single power fied from −55°C to +175°C and 10-lead ceramic flat package supply, VDD. It is a fast throughput, high accuracy, high tempera- (FLATPACK) with operation specified from −55°C to +210°C. ture, successive approximation register (SAR) ADC, packaged in a These packages are designed for robustness at extreme tempera- small form factor with a versatile serial port interface (SPI). tures, including monometallic wire bonding, and are qualified On the CNV rising edge, the AD7981 samples an analog input, for up to 1000 hours of operation at the maximum temperature IN+, between 0 V and REF with respect to a ground sense, IN−. rating. The reference voltage, REF, is applied external y and can be set The AD7981 is a member of a growing series of high temperature independent of the supply voltage, VDD. The device power qualified products offered by Analog Devices, Inc. For a complete scales linearly with throughput. selection of available high temperature products, see the high The SPI-compatible serial interface also features the ability, temperature product list and qualification data available at using the SDI input, to daisy-chain several ADCs on a single, www.analog.com/hightemp. 1 Protected by U.S. Patent 6,703,961.
Rev. B 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 ©2014–2017 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 APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE \CS MODE, 3-WIRE WITHOUT A BUSY INDICATOR \CS MODE, 3-WIRE WITH A BUSY INDICATOR \CS MODE, 4-WIRE WITHOUT A BUSY INDICATOR \CS MODE, 4-WIRE WITH A BUSY INDICATOR CHAIN MODE WITHOUT A BUSY INDICATOR CHAIN MODE WITH A BUSY INDICATOR APPLICATIONS INFORMATION PRINTED CIRCUIT BOARD (PCB) LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE
