Part # AD7708 AD7718 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: . AD7708_7718

Part Details:

a 8-/10-Channel, Low Voltage, Low Power, - ADCs AD7708/AD7718 FEATURES GENERAL DESCRIPTION 8-/10-Channel, High Resolution - ADCs The AD7708/AD7718 are complete analog front-ends for low AD7708 Has 16-Bit Resolution frequency measurement applications. The AD7718 contains a AD7718 Has 24-Bit Resolution 24-bit - ADC with PGA and can be configured as 4/5 fully- Factory-Calibrated differential input channels or 8/10 pseudo-differential input Single Conversion Cycle Setting channels. Two pins on the device are configurable as analog Programmable Gain Front End inputs or reference inputs. The AD7708 is a 16-bit version of Simultaneous 50 Hz and 60 Hz Rejection the AD7718. Input signal ranges from 20 mV to 2.56 V can be VREF SelectTM Allows Absolute and Ratiometric directly converted using these ADCs. Signals can be converted Measurement Capability directly from a transducer without the need for signal conditioning. Operation Can Be Optimized for The device operates from a 32 kHz crystal with an on-board PLL Analog Performance (CHOP = 0) or generating the required internal operating frequency. The output Channel Throughput (CHOP = 1) data rate from the part is software programmable. The peak-to- INTERFACE peak resolution from the part varies with the programmed gain 3-Wire Serial and output data rate. SPITM, QSPITM, MICROWIRETM, and DSP-Compatible The part operates from a single 3 V or 5 V supply. When operating Schmitt Trigger on SCLK from 3 V supplies, the power dissipation for the part is 3.84 mW typ. POWER Both parts are pin-for-pin compatible allowing an upgradable Specified for Single 3 V and 5 V Operation path from 16 to 24 bits without the need for hardware modifica- Normal: 1.28 mA Typ @ 3 V tions. The AD7708/AD7718 are housed in 28-lead SOIC and Power-Down: 30 A (32 kHz Crystal Running) TSSOP packages. On-Chip Functions Rail-to-Rail Input Buffer and PGA2-Bit Digital I/O Port APPLICATIONSIndustrial Process ControlInstrumentationPressure TransducersPortable InstrumentationSmart Transmitters FUNCTIONAL BLOCK DIAGRAM DVDD DGND REFIN2(+)/AIN9 REFIN1(+) REFIN2(­)/AIN10 REFIN1(­) XTAL1 XTAL2

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AD7708 AD7718.pdf Datasheet