Datasheet AD7981-KGD (Analog Devices)

High Temperature, 16-Bit, 600 kSPS PulSAR® ADC Known Good Die AD7981-KGD FEATURES FUNCTIONAL BLOCK DIAGRAM Extreme high temperature operation 2.5V TO 5.0V 2.5V Specified temperature range: −55°C to +175°C High performance 16-bit resolution with no missing codes REF VDD VIO 1.8V TO 5.0V 0V TO V 600 kSPS throughput with no latency/pipeline delay REF IN+ SDI SNR: 91 dB typical at 1 kHz input frequency AD7981-KGD SCK 3- OR 4-WIRE INTERFACE IN– SDO (SPI, DAISY CHAIN, CS) THD: −102 dB typical at 1 kHz input frequency GND CNV
001
INL: ±2.0 LSB maximum, DNL: ±0.9 LSB maximum
12589-
Low power dissipation
Figure 1.
2.25 mW typical at 600 kSPS (VDD only) 4.65 mW typical at 600 kSPS (total) 70 µW typical at 10 kSPS Pseudo differential analog input range 0 V to VREF with VREF between 2.4 V and 5.1 V Easy to use Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface SPI-/QSPI-/MICROWIRE-/DSP-compatible digital interface Daisy-chain multiple ADCs and busy indicator Known good die (KGD): these die are fully guaranteed to data sheet specifications APPLICATIONS Downhole drilling and instrumentation Avionics Heavy industrial High temperature environments GENERAL DESCRIPTION
The AD7981-KGD1 is a 16-bit, successive approximation, The SPI-compatible serial interface also features the ability, analog-to-digital converter (ADC) designed for high temperature using the SDI input, to daisy-chain several ADCs on a single, operation. The AD7981-KGD is capable of sample rates up to 3-wire bus and provides an optional busy indicator. It is compatible 600 kSPS while maintaining low power consumption from a single with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO. power supply, VDD. It is a fast throughput, high accuracy, high The AD7981-KGD is a member of a growing series of high temperature, successive approximation register (SAR) ADC and temperature qualified products offered by Analog Devices, Inc. For packaged in a small form factor with a versatile serial port a complete selection of available high temperature products, see interface (SPI). the high temperature product list and qualification data On the CNV rising edge, the AD7981-KGD samples an analog available at www.analog.com/hightemp. input, IN+, between 0 V and REF with respect to a ground Additional application and technical information can be found sense, IN−. The reference voltage, REF, is applied external y and in the AD7981 data sheet. can be set independent of the supply voltage, VDD. The device power scales linearly with throughput. 1 Protected by U.S. Patent 6,703,961.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY OUTLINE DIMENSIONS DIE SPECIFICATIONS AND ASSEMBLY RECOMMENDATIONS ORDERING GUIDE