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ADS8318IBDGSR
16-Bit, Unipolar Diff Input, 500kSPS Serial Out, 4.5V to 5.5V Micro Power Sampling ADC
CDAC COMP
SAR O/P
Drive
I/P
Shift
Reg
Conversion and I/O
Control Logic
IN+
IN-
REFIN
+VA +VBD
SDO
SDI
SCLK
CONVSTGND
ADS8318
ADS8318
www.ti.com SLAS568A –MAY 2008–REVISED MARCH 2011
16-BIT, 500-KSPS, SERIAL INTERFACE MICROPOWER, MINIATURE,
SAR ANALOG-TO-DIGITAL CONVERTER
Checkfor Samples: ADS8318
1FEATURES DESCRIPTIONThe ADS8318isa 16-bit, 500-KSPS analog-to-digital•
500-kHz Sample Rate converter.It operates witha 2.048-Vto 5.5-V external•
16-Bit Resolution reference. The device includesa capacitor based,
Zero Latencyat Full Speed SAR A/D converter with inherent sample and hold.
Unipolar, Differential Input, Range: –Vref
to Vref The devices includesa 50-MHz SPI compatible serial
SPI Compatible Serial Interface with Daisy interface. The interfaceis designedto support daisy
chaining or cascading of multiple devices. Alsoa
Chain OptionBusy Indicator makesit easyto synchronize with the•
Excellent Performance: digital host.–
95.2dB SNR Typat 10-kHz I/PThe ADS8318 unipolar differential input range– –108dB
THD Typat 10-kHz I/P supportsa differential input swingof –Vrefto +Vref with– ±1.0
LSB Max INL a common-modeof +Vref/2. ±0.75
LSB Max DNL Device operationis optimized for very low power•
Low Power Dissipation:18 mW Typat 500 operation, and the power consumption directly scales
KSPS with speed. This feature makesit attractive for lower
speed applications.•
Power Scales Linearly with Speed: 3.6 mW/100
KSPS Itis availablein 10-pin MSOP and SON packages.
Power Dissipation During Power-Down State:
0.25 μW
Typ 10-Pin MSOP and SON Packages
APPLICATIONS
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